diff options
| author | Linus Torvalds <torvalds@linux-foundation.org> | 2016-08-02 16:11:27 -0400 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2016-08-02 16:11:27 -0400 |
| commit | 221bb8a46e230b9824204ae86537183d9991ff2a (patch) | |
| tree | 92510d72285b2285be7cb87288bf088cb28af4c1 /arch/mips | |
| parent | f7b32e4c021fd788f13f6785e17efbc3eb05b351 (diff) | |
| parent | 23528bb21ee2c9b27f3feddd77a2a3351a8df148 (diff) | |
Merge tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm
Pull KVM updates from Paolo Bonzini:
- ARM: GICv3 ITS emulation and various fixes. Removal of the
old VGIC implementation.
- s390: support for trapping software breakpoints, nested
virtualization (vSIE), the STHYI opcode, initial extensions
for CPU model support.
- MIPS: support for MIPS64 hosts (32-bit guests only) and lots
of cleanups, preliminary to this and the upcoming support for
hardware virtualization extensions.
- x86: support for execute-only mappings in nested EPT; reduced
vmexit latency for TSC deadline timer (by about 30%) on Intel
hosts; support for more than 255 vCPUs.
- PPC: bugfixes.
* tag 'for-linus' of git://git.kernel.org/pub/scm/virt/kvm/kvm: (302 commits)
KVM: PPC: Introduce KVM_CAP_PPC_HTM
MIPS: Select HAVE_KVM for MIPS64_R{2,6}
MIPS: KVM: Reset CP0_PageMask during host TLB flush
MIPS: KVM: Fix ptr->int cast via KVM_GUEST_KSEGX()
MIPS: KVM: Sign extend MFC0/RDHWR results
MIPS: KVM: Fix 64-bit big endian dynamic translation
MIPS: KVM: Fail if ebase doesn't fit in CP0_EBase
MIPS: KVM: Use 64-bit CP0_EBase when appropriate
MIPS: KVM: Set CP0_Status.KX on MIPS64
MIPS: KVM: Make entry code MIPS64 friendly
MIPS: KVM: Use kmap instead of CKSEG0ADDR()
MIPS: KVM: Use virt_to_phys() to get commpage PFN
MIPS: Fix definition of KSEGX() for 64-bit
KVM: VMX: Add VMCS to CPU's loaded VMCSs before VMPTRLD
kvm: x86: nVMX: maintain internal copy of current VMCS
KVM: PPC: Book3S HV: Save/restore TM state in H_CEDE
KVM: PPC: Book3S HV: Pull out TM state save/restore into separate procedures
KVM: arm64: vgic-its: Simplify MAPI error handling
KVM: arm64: vgic-its: Make vgic_its_cmd_handle_mapi similar to other handlers
KVM: arm64: vgic-its: Turn device_id validation into generic ID validation
...
Diffstat (limited to 'arch/mips')
32 files changed, 2386 insertions, 1924 deletions
diff --git a/arch/mips/Kconfig b/arch/mips/Kconfig index ac91939b9b75..29867139851e 100644 --- a/arch/mips/Kconfig +++ b/arch/mips/Kconfig @@ -1488,6 +1488,7 @@ config CPU_MIPS64_R2 select CPU_SUPPORTS_HIGHMEM select CPU_SUPPORTS_HUGEPAGES select CPU_SUPPORTS_MSA + select HAVE_KVM help Choose this option to build a kernel for release 2 or later of the MIPS64 architecture. Many modern embedded systems with a 64-bit @@ -1505,6 +1506,7 @@ config CPU_MIPS64_R6 select CPU_SUPPORTS_MSA select GENERIC_CSUM select MIPS_O32_FP64_SUPPORT if MIPS32_O32 + select HAVE_KVM help Choose this option to build a kernel for release 6 or later of the MIPS64 architecture. New MIPS processors, starting with the Warrior diff --git a/arch/mips/include/asm/addrspace.h b/arch/mips/include/asm/addrspace.h index 3b0e51d5a613..c5b04e752e97 100644 --- a/arch/mips/include/asm/addrspace.h +++ b/arch/mips/include/asm/addrspace.h @@ -45,7 +45,7 @@ /* * Returns the kernel segment base of a given address */ -#define KSEGX(a) ((_ACAST32_ (a)) & 0xe0000000) +#define KSEGX(a) ((_ACAST32_(a)) & _ACAST32_(0xe0000000)) /* * Returns the physical address of a CKSEGx / XKPHYS address diff --git a/arch/mips/include/asm/kvm_host.h b/arch/mips/include/asm/kvm_host.h index 36a391d289aa..b54bcadd8aec 100644 --- a/arch/mips/include/asm/kvm_host.h +++ b/arch/mips/include/asm/kvm_host.h @@ -19,6 +19,9 @@ #include <linux/threads.h> #include <linux/spinlock.h> +#include <asm/inst.h> +#include <asm/mipsregs.h> + /* MIPS KVM register ids */ #define MIPS_CP0_32(_R, _S) \ (KVM_REG_MIPS_CP0 | KVM_REG_SIZE_U32 | (8 * (_R) + (_S))) @@ -53,6 +56,12 @@ #define KVM_REG_MIPS_CP0_CONFIG7 MIPS_CP0_32(16, 7) #define KVM_REG_MIPS_CP0_XCONTEXT MIPS_CP0_64(20, 0) #define KVM_REG_MIPS_CP0_ERROREPC MIPS_CP0_64(30, 0) +#define KVM_REG_MIPS_CP0_KSCRATCH1 MIPS_CP0_64(31, 2) +#define KVM_REG_MIPS_CP0_KSCRATCH2 MIPS_CP0_64(31, 3) +#define KVM_REG_MIPS_CP0_KSCRATCH3 MIPS_CP0_64(31, 4) +#define KVM_REG_MIPS_CP0_KSCRATCH4 MIPS_CP0_64(31, 5) +#define KVM_REG_MIPS_CP0_KSCRATCH5 MIPS_CP0_64(31, 6) +#define KVM_REG_MIPS_CP0_KSCRATCH6 MIPS_CP0_64(31, 7) #define KVM_MAX_VCPUS 1 @@ -65,8 +74,14 @@ -/* Special address that contains the comm page, used for reducing # of traps */ -#define KVM_GUEST_COMMPAGE_ADDR 0x0 +/* + * Special address that contains the comm page, used for reducing # of traps + * This needs to be within 32Kb of 0x0 (so the zero register can be used), but + * preferably not at 0x0 so that most kernel NULL pointer dereferences can be + * caught. + */ +#define KVM_GUEST_COMMPAGE_ADDR ((PAGE_SIZE > 0x8000) ? 0 : \ + (0x8000 - PAGE_SIZE)) #define KVM_GUEST_KERNEL_MODE(vcpu) ((kvm_read_c0_guest_status(vcpu->arch.cop0) & (ST0_EXL | ST0_ERL)) || \ ((kvm_read_c0_guest_status(vcpu->arch.cop0) & KSU_USER) == 0)) @@ -93,9 +108,6 @@ #define KVM_INVALID_ADDR 0xdeadbeef extern atomic_t kvm_mips_instance; -extern kvm_pfn_t (*kvm_mips_gfn_to_pfn)(struct kvm *kvm, gfn_t gfn); -extern void (*kvm_mips_release_pfn_clean)(kvm_pfn_t pfn); -extern bool (*kvm_mips_is_error_pfn)(kvm_pfn_t pfn); struct kvm_vm_stat { u32 remote_tlb_flush; @@ -126,28 +138,6 @@ struct kvm_vcpu_stat { u32 halt_wakeup; }; -enum kvm_mips_exit_types { - WAIT_EXITS, - CACHE_EXITS, - SIGNAL_EXITS, - INT_EXITS, - COP_UNUSABLE_EXITS, - TLBMOD_EXITS, - TLBMISS_LD_EXITS, - TLBMISS_ST_EXITS, - ADDRERR_ST_EXITS, - ADDRERR_LD_EXITS, - SYSCALL_EXITS, - RESVD_INST_EXITS, - BREAK_INST_EXITS, - TRAP_INST_EXITS, - MSA_FPE_EXITS, - FPE_EXITS, - MSA_DISABLED_EXITS, - FLUSH_DCACHE_EXITS, - MAX_KVM_MIPS_EXIT_TYPES -}; - struct kvm_arch_memory_slot { }; @@ -215,73 +205,6 @@ struct mips_coproc { #define MIPS_CP0_CONFIG4_SEL 4 #define MIPS_CP0_CONFIG5_SEL 5 -/* Config0 register bits */ -#define CP0C0_M 31 -#define CP0C0_K23 28 -#define CP0C0_KU 25 -#define CP0C0_MDU 20 -#define CP0C0_MM 17 -#define CP0C0_BM 16 -#define CP0C0_BE 15 -#define CP0C0_AT 13 -#define CP0C0_AR 10 -#define CP0C0_MT 7 -#define CP0C0_VI 3 -#define CP0C0_K0 0 - -/* Config1 register bits */ -#define CP0C1_M 31 -#define CP0C1_MMU 25 -#define CP0C1_IS 22 -#define CP0C1_IL 19 -#define CP0C1_IA 16 -#define CP0C1_DS 13 -#define CP0C1_DL 10 -#define CP0C1_DA 7 -#define CP0C1_C2 6 -#define CP0C1_MD 5 -#define CP0C1_PC 4 -#define CP0C1_WR 3 -#define CP0C1_CA 2 -#define CP0C1_EP 1 -#define CP0C1_FP 0 - -/* Config2 Register bits */ -#define CP0C2_M 31 -#define CP0C2_TU 28 -#define CP0C2_TS 24 -#define CP0C2_TL 20 -#define CP0C2_TA 16 -#define CP0C2_SU 12 -#define CP0C2_SS 8 -#define CP0C2_SL 4 -#define CP0C2_SA 0 - -/* Config3 Register bits */ -#define CP0C3_M 31 -#define CP0C3_ISA_ON_EXC 16 -#define CP0C3_ULRI 13 -#define CP0C3_DSPP 10 -#define CP0C3_LPA 7 -#define CP0C3_VEIC 6 -#define CP0C3_VInt 5 -#define CP0C3_SP 4 -#define CP0C3_MT 2 -#define CP0C3_SM 1 -#define CP0C3_TL 0 - -/* MMU types, the first four entries have the same layout as the - CP0C0_MT field. */ -enum mips_mmu_types { - MMU_TYPE_NONE, - MMU_TYPE_R4000, - MMU_TYPE_RESERVED, - MMU_TYPE_FMT, - MMU_TYPE_R3000, - MMU_TYPE_R6000, - MMU_TYPE_R8000 -}; - /* Resume Flags */ #define RESUME_FLAG_DR (1<<0) /* Reload guest nonvolatile state? */ #define RESUME_FLAG_HOST (1<<1) /* Resume host? */ @@ -298,11 +221,6 @@ enum emulation_result { EMULATE_PRIV_FAIL, }; -#define MIPS3_PG_G 0x00000001 /* Global; ignore ASID if in lo0 & lo1 */ -#define MIPS3_PG_V 0x00000002 /* Valid */ -#define MIPS3_PG_NV 0x00000000 -#define MIPS3_PG_D 0x00000004 /* Dirty */ - #define mips3_paddr_to_tlbpfn(x) \ (((unsigned long)(x) >> MIPS3_PG_SHIFT) & MIPS3_PG_FRAME) #define mips3_tlbpfn_to_paddr(x) \ @@ -313,13 +231,11 @@ enum emulation_result { #define VPN2_MASK 0xffffe000 #define KVM_ENTRYHI_ASID MIPS_ENTRYHI_ASID -#define TLB_IS_GLOBAL(x) (((x).tlb_lo0 & MIPS3_PG_G) && \ - ((x).tlb_lo1 & MIPS3_PG_G)) +#define TLB_IS_GLOBAL(x) ((x).tlb_lo[0] & (x).tlb_lo[1] & ENTRYLO_G) #define TLB_VPN2(x) ((x).tlb_hi & VPN2_MASK) #define TLB_ASID(x) ((x).tlb_hi & KVM_ENTRYHI_ASID) -#define TLB_IS_VALID(x, va) (((va) & (1 << PAGE_SHIFT)) \ - ? ((x).tlb_lo1 & MIPS3_PG_V) \ - : ((x).tlb_lo0 & MIPS3_PG_V)) +#define TLB_LO_IDX(x, va) (((va) >> PAGE_SHIFT) & 1) +#define TLB_IS_VALID(x, va) ((x).tlb_lo[TLB_LO_IDX(x, va)] & ENTRYLO_V) #define TLB_HI_VPN2_HIT(x, y) ((TLB_VPN2(x) & ~(x).tlb_mask) == \ ((y) & VPN2_MASK & ~(x).tlb_mask)) #define TLB_HI_ASID_HIT(x, y) (TLB_IS_GLOBAL(x) || \ @@ -328,26 +244,23 @@ enum emulation_result { struct kvm_mips_tlb { long tlb_mask; long tlb_hi; - long tlb_lo0; - long tlb_lo1; + long tlb_lo[2]; }; -#define KVM_MIPS_FPU_FPU 0x1 -#define KVM_MIPS_FPU_MSA 0x2 +#define KVM_MIPS_AUX_FPU 0x1 +#define KVM_MIPS_AUX_MSA 0x2 #define KVM_MIPS_GUEST_TLB_SIZE 64 struct kvm_vcpu_arch { - void *host_ebase, *guest_ebase; + void *guest_ebase; int (*vcpu_run)(struct kvm_run *run, struct kvm_vcpu *vcpu); unsigned long host_stack; unsigned long host_gp; /* Host CP0 registers used when handling exits from guest */ unsigned long host_cp0_badvaddr; - unsigned long host_cp0_cause; unsigned long host_cp0_epc; - unsigned long host_cp0_entryhi; - uint32_t guest_inst; + u32 host_cp0_cause; /* GPRS */ unsigned long gprs[32]; @@ -357,8 +270,8 @@ struct kvm_vcpu_arch { /* FPU State */ struct mips_fpu_struct fpu; - /* Which FPU state is loaded (KVM_MIPS_FPU_*) */ - unsigned int fpu_inuse; + /* Which auxiliary state is loaded (KVM_MIPS_AUX_*) */ + unsigned int aux_inuse; /* COP0 State */ struct mips_coproc *cop0; @@ -370,11 +283,11 @@ struct kvm_vcpu_arch { struct hrtimer comparecount_timer; /* Count timer control KVM register */ - uint32_t count_ctl; + u32 count_ctl; /* Count bias from the raw time */ - uint32_t count_bias; + u32 count_bias; /* Frequency of timer in Hz */ - uint32_t count_hz; + u32 count_hz; /* Dynamic nanosecond bias (multiple of count_period) to avoid overflow */ s64 count_dyn_bias; /* Resume time */ @@ -388,7 +301,7 @@ struct kvm_vcpu_arch { /* Bitmask of pending exceptions to be cleared */ unsigned long pending_exceptions_clr; - unsigned long pending_load_cause; + u32 pending_load_cause; /* Save/Restore the entryhi register when are are preempted/scheduled back in */ unsigned long preempt_entryhi; @@ -397,8 +310,8 @@ struct kvm_vcpu_arch { struct kvm_mips_tlb guest_tlb[KVM_MIPS_GUEST_TLB_SIZE]; /* Cached guest kernel/user ASIDs */ - uint32_t guest_user_asid[NR_CPUS]; - uint32_t guest_kernel_asid[NR_CPUS]; + u32 guest_user_asid[NR_CPUS]; + u32 guest_kernel_asid[NR_CPUS]; struct mm_struct guest_kernel_mm, guest_user_mm; int last_sched_cpu; @@ -408,6 +321,7 @@ struct kvm_vcpu_arch { u8 fpu_enabled; u8 msa_enabled; + u8 kscratch_enabled; }; @@ -461,6 +375,18 @@ struct kvm_vcpu_arch { #define kvm_write_c0_guest_config7(cop0, val) (cop0->reg[MIPS_CP0_CONFIG][7] = (val)) #define kvm_read_c0_guest_errorepc(cop0) (cop0->reg[MIPS_CP0_ERROR_PC][0]) #define kvm_write_c0_guest_errorepc(cop0, val) (cop0->reg[MIPS_CP0_ERROR_PC][0] = (val)) +#define kvm_read_c0_guest_kscratch1(cop0) (cop0->reg[MIPS_CP0_DESAVE][2]) +#define kvm_read_c0_guest_kscratch2(cop0) (cop0->reg[MIPS_CP0_DESAVE][3]) +#define kvm_read_c0_guest_kscratch3(cop0) (cop0->reg[MIPS_CP0_DESAVE][4]) +#define kvm_read_c0_guest_kscratch4(cop0) (cop0->reg[MIPS_CP0_DESAVE][5]) +#define kvm_read_c0_guest_kscratch5(cop0) (cop0->reg[MIPS_CP0_DESAVE][6]) +#define kvm_read_c0_guest_kscratch6(cop0) (cop0->reg[MIPS_CP0_DESAVE][7]) +#define kvm_write_c0_guest_kscratch1(cop0, val) (cop0->reg[MIPS_CP0_DESAVE][2] = (val)) +#define kvm_write_c0_guest_kscratch2(cop0, val) (cop0->reg[MIPS_CP0_DESAVE][3] = (val)) +#define kvm_write_c0_guest_kscratch3(cop0, val) (cop0->reg[MIPS_CP0_DESAVE][4] = (val)) +#define kvm_write_c0_guest_kscratch4(cop0, val) (cop0->reg[MIPS_CP0_DESAVE][5] = (val)) +#define kvm_write_c0_guest_kscratch5(cop0, val) (cop0->reg[MIPS_CP0_DESAVE][6] = (val)) +#define kvm_write_c0_guest_kscratch6(cop0, val) (cop0->reg[MIPS_CP0_DESAVE][7] = (val)) /* * Some of the guest registers may be modified asynchronously (e.g. from a @@ -474,7 +400,7 @@ static inline void _kvm_atomic_set_c0_guest_reg(unsigned long *reg, unsigned long temp; do { __asm__ __volatile__( - " .set mips3 \n" + " .set "MIPS_ISA_ARCH_LEVEL" \n" " " __LL "%0, %1 \n" " or %0, %2 \n" " " __SC "%0, %1 \n" @@ -490,7 +416,7 @@ static inline void _kvm_atomic_clear_c0_guest_reg(unsigned long *reg, unsigned long temp; do { __asm__ __volatile__( - " .set mips3 \n" + " .set "MIPS_ISA_ARCH_LEVEL" \n" " " __LL "%0, %1 \n" " and %0, %2 \n" " " __SC "%0, %1 \n" @@ -507,7 +433,7 @@ static inline void _kvm_atomic_change_c0_guest_reg(unsigned long *reg, unsigned long temp; do { __asm__ __volatile__( - " .set mips3 \n" + " .set "MIPS_ISA_ARCH_LEVEL" \n" " " __LL "%0, %1 \n" " and %0, %2 \n" " or %0, %3 \n" @@ -542,7 +468,7 @@ static inline void _kvm_atomic_change_c0_guest_reg(unsigned long *reg, static inline bool kvm_mips_guest_can_have_fpu(struct kvm_vcpu_arch *vcpu) { - return (!__builtin_constant_p(cpu_has_fpu) || cpu_has_fpu) && + return (!__builtin_constant_p(raw_cpu_has_fpu) || raw_cpu_has_fpu) && vcpu->fpu_enabled; } @@ -589,9 +515,11 @@ struct kvm_mips_callbacks { void (*dequeue_io_int)(struct kvm_vcpu *vcpu, struct kvm_mips_interrupt *irq); int (*irq_deliver)(struct kvm_vcpu *vcpu, unsigned int priority, - uint32_t cause); + u32 cause); int (*irq_clear)(struct kvm_vcpu *vcpu, unsigned int priority, - uint32_t cause); + u32 cause); + unsigned long (*num_regs)(struct kvm_vcpu *vcpu); + int (*copy_reg_indices)(struct kvm_vcpu *vcpu, u64 __user *indices); int (*get_one_reg)(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg, s64 *v); int (*set_one_reg)(struct kvm_vcpu *vcpu, @@ -605,8 +533,13 @@ int kvm_mips_emulation_init(struct kvm_mips_callbacks **install_callbacks); /* Debug: dump vcpu state */ int kvm_arch_vcpu_dump_regs(struct kvm_vcpu *vcpu); -/* Trampoline ASM routine to start running in "Guest" context */ -extern int __kvm_mips_vcpu_run(struct kvm_run *run, struct kvm_vcpu *vcpu); +extern int kvm_mips_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu); + +/* Building of entry/exception code */ +int kvm_mips_entry_setup(void); +void *kvm_mips_build_vcpu_run(void *addr); +void *kvm_mips_build_exception(void *addr, void *handler); +void *kvm_mips_build_exit(void *addr); /* FPU/MSA context management */ void __kvm_save_fpu(struct kvm_vcpu_arch *vcpu); @@ -622,11 +555,11 @@ void kvm_drop_fpu(struct kvm_vcpu *vcpu); void kvm_lose_fpu(struct kvm_vcpu *vcpu); /* TLB handling */ -uint32_t kvm_get_kernel_asid(struct kvm_vcpu *vcpu); +u32 kvm_get_kernel_asid(struct kvm_vcpu *vcpu); -uint32_t kvm_get_user_asid(struct kvm_vcpu *vcpu); +u32 kvm_get_user_asid(struct kvm_vcpu *vcpu); -uint32_t kvm_get_commpage_asid (struct kvm_vcpu *vcpu); +u32 kvm_get_commpage_asid (struct kvm_vcpu *vcpu); extern int kvm_mips_handle_kseg0_tlb_fault(unsigned long badbaddr, struct kvm_vcpu *vcpu); @@ -635,22 +568,24 @@ extern int kvm_mips_handle_commpage_tlb_fault(unsigned long badvaddr, struct kvm_vcpu *vcpu); extern int kvm_mips_handle_mapped_seg_tlb_fault(struct kvm_vcpu *vcpu, - struct kvm_mips_tlb *tlb, - unsigned long *hpa0, - unsigned long *hpa1); + struct kvm_mips_tlb *tlb); -extern enum emulation_result kvm_mips_handle_tlbmiss(unsigned long cause, - uint32_t *opc, +extern enum emulation_result kvm_mips_handle_tlbmiss(u32 cause, + u32 *opc, struct kvm_run *run, struct kvm_vcpu *vcpu); -extern enum emulation_result kvm_mips_handle_tlbmod(unsigned long cause, - uint32_t *opc, +extern enum emulation_result kvm_mips_handle_tlbmod(u32 cause, + u32 *opc, struct kvm_run *run, struct kvm_vcpu *vcpu); extern void kvm_mips_dump_host_tlbs(void); extern void kvm_mips_dump_guest_tlbs(struct kvm_vcpu *vcpu); +extern int kvm_mips_host_tlb_write(struct kvm_vcpu *vcpu, unsigned long entryhi, + unsigned long entrylo0, + unsigned long entrylo1, + int flush_dcache_mask); extern void kvm_mips_flush_host_tlb(int skip_kseg0); extern int kvm_mips_host_tlb_inv(struct kvm_vcpu *vcpu, unsigned long entryhi); @@ -667,90 +602,90 @@ extern void kvm_mips_vcpu_load(struct kvm_vcpu *vcpu, int cpu); extern void kvm_mips_vcpu_put(struct kvm_vcpu *vcpu); /* Emulation */ -uint32_t kvm_get_inst(uint32_t *opc, struct kvm_vcpu *vcpu); -enum emulation_result update_pc(struct kvm_vcpu *vcpu, uint32_t cause); +u32 kvm_get_inst(u32 *opc, struct kvm_vcpu *vcpu); +enum emulation_result update_pc(struct kvm_vcpu *vcpu, u32 cause); -extern enum emulation_result kvm_mips_emulate_inst(unsigned long cause, - uint32_t *opc, +extern enum emulation_result kvm_mips_emulate_inst(u32 cause, + u32 *opc, struct kvm_run *run, struct kvm_vcpu *vcpu); -extern enum emulation_result kvm_mips_emulate_syscall(unsigned long cause, - uint32_t *opc, +extern enum emulation_result kvm_mips_emulate_syscall(u32 cause, + u32 *opc, struct kvm_run *run, struct kvm_vcpu *vcpu); -extern enum emulation_result kvm_mips_emulate_tlbmiss_ld(unsigned long cause, - uint32_t *opc, +extern enum emulation_result kvm_mips_emulate_tlbmiss_ld(u32 cause, + u32 *opc, struct kvm_run *run, struct kvm_vcpu *vcpu); -extern enum emulation_result kvm_mips_emulate_tlbinv_ld(unsigned long cause, - uint32_t *opc, +extern enum emulation_result kvm_mips_emulate_tlbinv_ld(u32 cause, + u32 *opc, struct kvm_run *run, struct kvm_vcpu *vcpu); -extern enum emulation_result kvm_mips_emulate_tlbmiss_st(unsigned long cause, - uint32_t *opc, +extern enum emulation_result kvm_mips_emulate_tlbmiss_st(u32 cause, + u32 *opc, struct kvm_run *run, struct kvm_vcpu *vcpu); -extern enum emulation_result kvm_mips_emulate_tlbinv_st(unsigned long cause, - uint32_t *opc, +extern enum emulation_result kvm_mips_emulate_tlbinv_st(u32 cause, + u32 *opc, struct kvm_run *run, struct kvm_vcpu *vcpu); -extern enum emulation_result kvm_mips_emulate_tlbmod(unsigned long cause, - uint32_t *opc, +extern enum emulation_result kvm_mips_emulate_tlbmod(u32 cause, + u32 *opc, struct kvm_run *run, struct kvm_vcpu *vcpu); -extern enum emulation_result kvm_mips_emulate_fpu_exc(unsigned long cause, - uint32_t *opc, +extern enum emulation_result kvm_mips_emulate_fpu_exc(u32 cause, + u32 *opc, struct kvm_run *run, struct kvm_vcpu *vcpu); -extern enum emulation_result kvm_mips_handle_ri(unsigned long cause, - uint32_t *opc, +extern enum emulation_result kvm_mips_handle_ri(u32 cause, + u32 *opc, struct kvm_run *run, struct kvm_vcpu *vcpu); -extern enum emulation_result kvm_mips_emulate_ri_exc(unsigned long cause, - uint32_t *opc, +extern enum emulation_result kvm_mips_emulate_ri_exc(u32 cause, + u32 *opc, struct kvm_run *run, struct kvm_vcpu *vcpu); -extern enum emulation_result kvm_mips_emulate_bp_exc(unsigned long cause, - uint32_t *opc, +extern enum emulation_result kvm_mips_emulate_bp_exc(u32 cause, + u32 *opc, struct kvm_run *run, struct kvm_vcpu *vcpu); -extern enum emulation_result kvm_mips_emulate_trap_exc(unsigned long cause, - uint32_t *opc, +extern enum emulation_result kvm_mips_emulate_trap_exc(u32 cause, + u32 *opc, struct kvm_run *run, struct kvm_vcpu *vcpu); -extern enum emulation_result kvm_mips_emulate_msafpe_exc(unsigned long cause, - uint32_t *opc, +extern enum emulation_result kvm_mips_emulate_msafpe_exc(u32 cause, + u32 *opc, struct kvm_run *run, struct kvm_vcpu *vcpu); -extern enum emulation_result kvm_mips_emulate_fpe_exc(unsigned long cause, - uint32_t *opc, +extern enum emulation_result kvm_mips_emulate_fpe_exc(u32 cause, + u32 *opc, struct kvm_run *run, struct kvm_vcpu *vcpu); -extern enum emulation_result kvm_mips_emulate_msadis_exc(unsigned long cause, - uint32_t *opc, +extern enum emulation_result kvm_mips_emulate_msadis_exc(u32 cause, + u32 *opc, struct kvm_run *run, struct kvm_vcpu *vcpu); extern enum emulation_result kvm_mips_complete_mmio_load(struct kvm_vcpu *vcpu, struct kvm_run *run); -uint32_t kvm_mips_read_count(struct kvm_vcpu *vcpu); -void kvm_mips_write_count(struct kvm_vcpu *vcpu, uint32_t count); -void kvm_mips_write_compare(struct kvm_vcpu *vcpu, uint32_t compare, bool ack); +u32 kvm_mips_read_count(struct kvm_vcpu *vcpu); +void kvm_mips_write_count(struct kvm_vcpu *vcpu, u32 count); +void kvm_mips_write_compare(struct kvm_vcpu *vcpu, u32 compare, bool ack); void kvm_mips_init_count(struct kvm_vcpu *vcpu); int kvm_mips_set_count_ctl(struct kvm_vcpu *vcpu, s64 count_ctl); int kvm_mips_set_count_resume(struct kvm_vcpu *vcpu, s64 count_resume); @@ -759,27 +694,27 @@ void kvm_mips_count_enable_cause(struct kvm_vcpu *vcpu); void kvm_mips_count_disable_cause(struct kvm_vcpu *vcpu); enum hrtimer_restart kvm_mips_count_timeout(struct kvm_vcpu *vcpu); -enum emulation_result kvm_mips_check_privilege(unsigned long cause, - uint32_t *opc, +enum emulation_result kvm_mips_check_privilege(u32 cause, + u32 *opc, struct kvm_run *run, struct kvm_vcpu *vcpu); -enum emulation_result kvm_mips_emulate_cache(uint32_t inst, - uint32_t *opc, - uint32_t cause, +enum emulation_result kvm_mips_emulate_cache(union mips_instruction inst, + u32 *opc, + u32 cause, struct kvm_run *run, struct kvm_vcpu *vcpu); -enum emulation_result kvm_mips_emulate_CP0(uint32_t inst, - uint32_t *opc, - uint32_t cause, +enum emulation_result kvm_mips_emulate_CP0(union mips_instruction inst, + u32 *opc, + u32 cause, struct kvm_run *run, struct kvm_vcpu *vcpu); -enum emulation_result kvm_mips_emulate_store(uint32_t inst, - uint32_t cause, +enum emulation_result kvm_mips_emulate_store(union mips_instruction inst, + u32 cause, struct kvm_run *run, struct kvm_vcpu *vcpu); -enum emulation_result kvm_mips_emulate_load(uint32_t inst, - uint32_t cause, +enum emulation_result kvm_mips_emulate_load(union mips_instruction inst, + u32 cause, struct kvm_run *run, struct kvm_vcpu *vcpu); @@ -789,13 +724,13 @@ unsigned int kvm_mips_config4_wrmask(struct kvm_vcpu *vcpu); unsigned int kvm_mips_config5_wrmask(struct kvm_vcpu *vcpu); /* Dynamic binary translation */ -extern int kvm_mips_trans_cache_index(uint32_t inst, uint32_t *opc, - struct kvm_vcpu *vcpu); -extern int kvm_mips_trans_cache_va(uint32_t inst, uint32_t *opc, +extern int kvm_mips_trans_cache_index(union mips_instruction inst, + u32 *opc, struct kvm_vcpu *vcpu); +extern int kvm_mips_trans_cache_va(union mips_instruction inst, u32 *opc, struct kvm_vcpu *vcpu); -extern int kvm_mips_trans_mfc0(uint32_t inst, uint32_t *opc, +extern int kvm_mips_trans_mfc0(union mips_instruction inst, u32 *opc, struct kvm_vcpu *vcpu); -extern int kvm_mips_trans_mtc0(uint32_t inst, uint32_t *opc, +extern int kvm_mips_trans_mtc0(union mips_instruction inst, u32 *opc, struct kvm_vcpu *vcpu); /* Misc */ diff --git a/arch/mips/include/asm/mach-cavium-octeon/cpu-feature-overrides.h b/arch/mips/include/asm/mach-cavium-octeon/cpu-feature-overrides.h index d68e685cde60..bd8b9bbe1771 100644 --- a/arch/mips/include/asm/mach-cavium-octeon/cpu-feature-overrides.h +++ b/arch/mips/include/asm/mach-cavium-octeon/cpu-feature-overrides.h @@ -55,7 +55,7 @@ #define cpu_has_mipsmt 0 #define cpu_has_vint 0 #define cpu_has_veic 0 -#define cpu_hwrena_impl_bits 0xc0000000 +#define cpu_hwrena_impl_bits (MIPS_HWRENA_IMPL1 | MIPS_HWRENA_IMPL2) #define cpu_has_wsbh 1 #define cpu_has_rixi (cpu_data[0].cputype != CPU_CAVIUM_OCTEON) diff --git a/arch/mips/include/asm/mipsregs.h b/arch/mips/include/asm/mipsregs.h index e1ca65c62f6a..def9d8d13f6e 100644 --- a/arch/mips/include/asm/mipsregs.h +++ b/arch/mips/include/asm/mipsregs.h @@ -53,7 +53,7 @@ #define CP0_SEGCTL2 $5, 4 #define CP0_WIRED $6 #define CP0_INFO $7 -#define CP0_HWRENA $7, 0 +#define CP0_HWRENA $7 #define CP0_BADVADDR $8 #define CP0_BADINSTR $8, 1 #define CP0_COUNT $9 @@ -533,6 +533,7 @@ #define TX49_CONF_CWFON (_ULCAST_(1) << 27) /* Bits specific to the MIPS32/64 PRA. */ +#define MIPS_CONF_VI (_ULCAST_(1) << 3) #define MIPS_CONF_MT (_ULCAST_(7) << 7) #define MIPS_CONF_MT_TLB (_ULCAST_(1) << 7) #define MIPS_CONF_MT_FTLB (_ULCAST_(4) << 7) @@ -853,6 +854,24 @@ #define MIPS_CDMMBASE_ADDR_SHIFT 11 #define MIPS_CDMMBASE_ADDR_START 15 +/* RDHWR register numbers */ +#define MIPS_HWR_CPUNUM 0 /* CPU number */ +#define MIPS_HWR_SYNCISTEP 1 /* SYNCI step size */ +#define MIPS_HWR_CC 2 /* Cycle counter */ +#define MIPS_HWR_CCRES 3 /* Cycle counter resolution */ +#define MIPS_HWR_ULR 29 /* UserLocal */ +#define MIPS_HWR_IMPL1 30 /* Implementation dependent */ +#define MIPS_HWR_IMPL2 31 /* Implementation dependent */ + +/* Bits in HWREna register */ +#define MIPS_HWRENA_CPUNUM (_ULCAST_(1) << MIPS_HWR_CPUNUM) +#define MIPS_HWRENA_SYNCISTEP (_ULCAST_(1) << MIPS_HWR_SYNCISTEP) +#define MIPS_HWRENA_CC (_ULCAST_(1) << MIPS_HWR_CC) +#define MIPS_HWRENA_CCRES (_ULCAST_(1) << MIPS_HWR_CCRES) +#define MIPS_HWRENA_ULR (_ULCAST_(1) << MIPS_HWR_ULR) +#define MIPS_HWRENA_IMPL1 (_ULCAST_(1) << MIPS_HWR_IMPL1) +#define MIPS_HWRENA_IMPL2 (_ULCAST_(1) << MIPS_HWR_IMPL2) + /* * Bitfields in the TX39 family CP0 Configuration Register 3 */ diff --git a/arch/mips/include/asm/setup.h b/arch/mips/include/asm/setup.h index d7bfdeba9e84..4f5279a8308d 100644 --- a/arch/mips/include/asm/setup.h +++ b/arch/mips/include/asm/setup.h @@ -21,6 +21,7 @@ extern void *set_vi_handler(int n, vi_handler_t addr); extern void *set_except_vector(int n, void *addr); extern unsigned long ebase; +extern unsigned int hwrena; extern void per_cpu_trap_init(bool); extern void cpu_cache_init(void); diff --git a/arch/mips/include/asm/uasm.h b/arch/mips/include/asm/uasm.h index b6ecfeee4dbe..f7929f65f7ca 100644 --- a/arch/mips/include/asm/uasm.h +++ b/arch/mips/include/asm/uasm.h @@ -104,8 +104,13 @@ Ip_u1s2(_bltz); Ip_u1s2(_bltzl); Ip_u1u2s3(_bne); Ip_u2s3u1(_cache); +Ip_u1u2(_cfc1); +Ip_u2u1(_cfcmsa); +Ip_u1u2(_ctc1); +Ip_u2u1(_ctcmsa); Ip_u2u1s3(_daddiu); Ip_u3u1u2(_daddu); +Ip_u1(_di); Ip_u2u1msbu3(_dins); Ip_u2u1msbu3(_dinsm); Ip_u1u2(_divu); @@ -141,6 +146,8 @@ Ip_u1(_mfhi); Ip_u1(_mflo); Ip_u1u2u3(_mtc0); Ip_u1u2u3(_mthc0); +Ip_u1(_mthi); +Ip_u1(_mtlo); Ip_u3u1u2(_mul); Ip_u3u1u2(_or); Ip_u2u1u3(_ori); diff --git a/arch/mips/include/uapi/asm/inst.h b/arch/mips/include/uapi/asm/inst.h index 8051f9aa1379..77429d1622b3 100644 --- a/arch/mips/include/uapi/asm/inst.h +++ b/arch/mips/include/uapi/asm/inst.h @@ -21,20 +21,20 @@ enum major_op { spec_op, bcond_op, j_op, jal_op, beq_op, bne_op, blez_op, bgtz_op, - addi_op, cbcond0_op = addi_op, addiu_op, slti_op, sltiu_op, + addi_op, pop10_op = addi_op, addiu_op, slti_op, sltiu_op, andi_op, ori_op, xori_op, lui_op, cop0_op, cop1_op, cop2_op, cop1x_op, beql_op, bnel_op, blezl_op, bgtzl_op, - daddi_op, cbcond1_op = daddi_op, daddiu_op, ldl_op, ldr_op, + daddi_op, pop30_op = daddi_op, daddiu_op, ldl_op, ldr_op, spec2_op, jalx_op, mdmx_op, msa_op = mdmx_op, spec3_op, lb_op, lh_op, lwl_op, lw_op, lbu_op, lhu_op, lwr_op, lwu_op, sb_op, sh_op, swl_op, sw_op, sdl_op, sdr_op, swr_op, cache_op, ll_op, lwc1_op, lwc2_op, bc6_op = lwc2_op, pref_op, - lld_op, ldc1_op, ldc2_op, beqzcjic_op = ldc2_op, ld_op, + lld_op, ldc1_op, ldc2_op, pop66_op = ldc2_op, ld_op, sc_op, swc1_op, swc2_op, balc6_op = swc2_op, major_3b_op, - scd_op, sdc1_op, sdc2_op, bnezcjialc_op = sdc2_op, sd_op + scd_op, sdc1_op, sdc2_op, pop76_op = sdc2_op, sd_op }; /* @@ -93,6 +93,50 @@ enum spec3_op { }; /* + * Bits 10-6 minor opcode for r6 spec mult/div encodings + */ +enum mult_op { + mult_mult_op = 0x0, + mult_mul_op = 0x2, + mult_muh_op = 0x3, +}; +enum multu_op { + multu_multu_op = 0x0, + multu_mulu_op = 0x2, + multu_muhu_op = 0x3, +}; +enum div_op { + div_div_op = 0x0, + div_div6_op = 0x2, + div_mod_op = 0x3, +}; +enum divu_op { + divu_divu_op = 0x0, + divu_divu6_op = 0x2, + divu_modu_op = 0x3, +}; +enum dmult_op { + dmult_dmult_op = 0x0, + dmult_dmul_op = 0x2, + dmult_dmuh_op = 0x3, +}; +enum dmultu_op { + dmultu_dmultu_op = 0x0, + dmultu_dmulu_op = 0x2, + dmultu_dmuhu_op = 0x3, +}; +enum ddiv_op { + ddiv_ddiv_op = 0x0, + ddiv_ddiv6_op = 0x2, + ddiv_dmod_op = 0x3, +}; +enum ddivu_op { + ddivu_ddivu_op = 0x0, + ddivu_ddivu6_op = 0x2, + ddivu_dmodu_op = 0x3, +}; + +/* * rt field of bcond opcodes. */ enum rt_op { @@ -103,7 +147,7 @@ enum rt_op { bltzal_op, bgezal_op, bltzall_op, bgezall_op, rt_op_0x14, rt_op_0x15, rt_op_0x16, rt_op_0x17, rt_op_0x18, rt_op_0x19, rt_op_0x1a, rt_op_0x1b, - bposge32_op, rt_op_0x1d, rt_op_0x1e, rt_op_0x1f + bposge32_op, rt_op_0x1d, rt_op_0x1e, synci_op }; /* @@ -238,6 +282,21 @@ enum bshfl_func { }; /* + * MSA minor opcodes. + */ +enum msa_func { + msa_elm_op = 0x19, +}; + +/* + * MSA ELM opcodes. + */ +enum msa_elm { + msa_ctc_op = 0x3e, + msa_cfc_op = 0x7e, +}; + +/* * func field for MSA MI10 format. */ enum msa_mi10_func { @@ -264,7 +323,7 @@ enum mm_major_op { mm_pool32b_op, mm_pool16b_op, mm_lhu16_op, mm_andi16_op, mm_addiu32_op, mm_lhu32_op, mm_sh32_op, mm_lh32_op, mm_pool32i_op, mm_pool16c_op, mm_lwsp16_op, mm_pool16d_op, - mm_ori32_op, mm_pool32f_op, mm_reserved1_op, mm_reserved2_op, + mm_ori32_op, mm_pool32f_op, mm_pool32s_op, mm_reserved2_op, mm_pool32c_op, mm_lwgp16_op, mm_lw16_op, mm_pool16e_op, mm_xori32_op, mm_jals32_op, mm_addiupc_op, mm_reserved3_op, mm_reserved4_op, mm_pool16f_op, mm_sb16_op, mm_beqz16_op, @@ -360,7 +419,10 @@ enum mm_32axf_minor_op { mm_mflo32_op = 0x075, mm_jalrhb_op = 0x07c, mm_tlbwi_op = 0x08d, + mm_mthi32_op = 0x0b5, mm_tlbwr_op = 0x0cd, + mm_mtlo32_op = 0x0f5, + mm_di_op = 0x11d, mm_jalrs_op = 0x13c, mm_jalrshb_op = 0x17c, mm_sync_op = 0x1ad, @@ -479,6 +541,13 @@ enum mm_32f_73_minor_op { }; /* + * (microMIPS) POOL32S minor opcodes. + */ +enum mm_32s_minor_op { + mm_32s_elm_op = 0x16, +}; + +/* * (microMIPS) POOL16C minor opcodes. */ enum mm_16c_minor_op { @@ -586,6 +655,36 @@ struct r_format { /* Register format */ ;)))))) }; +struct c0r_format { /* C0 register format */ + __BITFIELD_FIELD(unsigned int opcode : 6, + __BITFIELD_FIELD(unsigned int rs : 5, + __BITFIELD_FIELD(unsigned int rt : 5, + __BITFIELD_FIELD(unsigned int rd : 5, + __BITFIELD_FIELD(unsigned int z: 8, + __BITFIELD_FIELD(unsigned int sel : 3, + ;)))))) +}; + +struct mfmc0_format { /* MFMC0 register format */ + __BITFIELD_FIELD(unsigned int opcode : 6, + __BITFIELD_FIELD(unsigned int rs : 5, + __BITFIELD_FIELD(unsigned int rt : 5, + __BITFIELD_FIELD(unsigned int rd : 5, + __BITFIELD_FIELD(unsigned int re : 5, + __BITFIELD_FIELD(unsigned int sc : 1, + __BITFIELD_FIELD(unsigned int : 2, + __BITFIELD_FIELD(unsigned int sel : 3, + ;)))))))) +}; + +struct co_format { /* C0 CO format */ + __BITFIELD_FIELD(unsigned int opcode : 6, + __BITFIELD_FIELD(unsigned int co : 1, + __BITFIELD_FIELD(unsigned int code : 19, + __BITFIELD_FIELD(unsigned int func : 6, + ;)))) +}; + struct p_format { /* Performance counter format (R10000) */ __BITFIELD_FIELD(unsigned int opcode : 6, __BITFIELD_FIELD(unsigned int rs : 5, @@ -937,6 +1036,9 @@ union mips_instruction { struct u_format u_format; struct c_format c_format; struct r_format r_format; + struct c0r_format c0r_format; + struct mfmc0_format mfmc0_format; + struct co_format co_format; struct p_format p_format; struct f_format f_format; struct ma_format ma_format; diff --git a/arch/mips/kernel/asm-offsets.c b/arch/mips/kernel/asm-offsets.c index 1ea973b2abb1..fae2f9447792 100644 --- a/arch/mips/kernel/asm-offsets.c +++ b/arch/mips/kernel/asm-offsets.c @@ -339,71 +339,9 @@ void output_pm_defines(void) } #endif -void output_cpuinfo_defines(void) -{ - COMMENT(" MIPS cpuinfo offsets. "); - DEFINE(CPUINFO_SIZE, sizeof(struct cpuinfo_mips)); -#ifdef CONFIG_MIPS_ASID_BITS_VARIABLE - OFFSET(CPUINFO_ASID_MASK, cpuinfo_mips, asid_mask); -#endif -} - void output_kvm_defines(void) { COMMENT(" KVM/MIPS Specfic offsets. "); - DEFINE(VCPU_ARCH_SIZE, sizeof(struct kvm_vcpu_arch)); - OFFSET(VCPU_RUN, kvm_vcpu, run); - OFFSET(VCPU_HOST_ARCH, kvm_vcpu, arch); - - OFFSET(VCPU_HOST_EBASE, kvm_vcpu_arch, host_ebase); - OFFSET(VCPU_GUEST_EBASE, kvm_vcpu_arch, guest_ebase); - - OFFSET(VCPU_HOST_STACK, kvm_vcpu_arch, host_stack); - OFFSET(VCPU_HOST_GP, kvm_vcpu_arch, host_gp); - - OFFSET(VCPU_HOST_CP0_BADVADDR, kvm_vcpu_arch, host_cp0_badvaddr); - OFFSET(VCPU_HOST_CP0_CAUSE, kvm_vcpu_arch, host_cp0_cause); - OFFSET(VCPU_HOST_EPC, kvm_vcpu_arch, host_cp0_epc); - OFFSET(VCPU_HOST_ENTRYHI, kvm_vcpu_arch, host_cp0_entryhi); - - OFFSET(VCPU_GUEST_INST, kvm_vcpu_arch, guest_inst); - - OFFSET(VCPU_R0, kvm_vcpu_arch, gprs[0]); - OFFSET(VCPU_R1, kvm_vcpu_arch, gprs[1]); - OFFSET(VCPU_R2, kvm_vcpu_arch, gprs[2]); - OFFSET(VCPU_R3, kvm_vcpu_arch, gprs[3]); - OFFSET(VCPU_R4, kvm_vcpu_arch, gprs[4]); - OFFSET(VCPU_R5, kvm_vcpu_arch, gprs[5]); - OFFSET(VCPU_R6, kvm_vcpu_arch, gprs[6]); - OFFSET(VCPU_R7, kvm_vcpu_arch, gprs[7]); - OFFSET(VCPU_R8, kvm_vcpu_arch, gprs[8]); - OFFSET(VCPU_R9, kvm_vcpu_arch, gprs[9]); - OFFSET(VCPU_R10, kvm_vcpu_arch, gprs[10]); - OFFSET(VCPU_R11, kvm_vcpu_arch, gprs[11]); - OFFSET(VCPU_R12, kvm_vcpu_arch, gprs[12]); - OFFSET(VCPU_R13, kvm_vcpu_arch, gprs[13]); - OFFSET(VCPU_R14, kvm_vcpu_arch, gprs[14]); - OFFSET(VCPU_R15, kvm_vcpu_arch, gprs[15]); - OFFSET(VCPU_R16, kvm_vcpu_arch, gprs[16]); - OFFSET(VCPU_R17, kvm_vcpu_arch, gprs[17]); - OFFSET(VCPU_R18, kvm_vcpu_arch, gprs[18]); - OFFSET(VCPU_R19, kvm_vcpu_arch, gprs[19]); - OFFSET(VCPU_R20, kvm_vcpu_arch, gprs[20]); - OFFSET(VCPU_R21, kvm_vcpu_arch, gprs[21]); - OFFSET(VCPU_R22, kvm_vcpu_arch, gprs[22]); - OFFSET(VCPU_R23, kvm_vcpu_arch, gprs[23]); - OFFSET(VCPU_R24, kvm_vcpu_arch, gprs[24]); - OFFSET(VCPU_R25, kvm_vcpu_arch, gprs[25]); - OFFSET(VCPU_R26, kvm_vcpu_arch, gprs[26]); - OFFSET(VCPU_R27, kvm_vcpu_arch, gprs[27]); - OFFSET(VCPU_R28, kvm_vcpu_arch, gprs[28]); - OFFSET(VCPU_R29, kvm_vcpu_arch, gprs[29]); - OFFSET(VCPU_R30, kvm_vcpu_arch, gprs[30]); - OFFSET(VCPU_R31, kvm_vcpu_arch, gprs[31]); - OFFSET(VCPU_LO, kvm_vcpu_arch, lo); - OFFSET(VCPU_HI, kvm_vcpu_arch, hi); - OFFSET(VCPU_PC, kvm_vcpu_arch, pc); - BLANK(); OFFSET(VCPU_FPR0, kvm_vcpu_arch, fpu.fpr[0]); OFFSET(VCPU_FPR1, kvm_vcpu_arch, fpu.fpr[1]); @@ -441,14 +379,6 @@ void output_kvm_defines(void) OFFSET(VCPU_FCR31, kvm_vcpu_arch, fpu.fcr31); OFFSET(VCPU_MSA_CSR, kvm_vcpu_arch, fpu.msacsr); BLANK(); - - OFFSET(VCPU_COP0, kvm_vcpu_arch, cop0); - OFFSET(VCPU_GUEST_KERNEL_ASID, kvm_vcpu_arch, guest_kernel_asid); - OFFSET(VCPU_GUEST_USER_ASID, kvm_vcpu_arch, guest_user_asid); - - OFFSET(COP0_TLB_HI, mips_coproc, reg[MIPS_CP0_TLB_HI][0]); - OFFSET(COP0_STATUS, mips_coproc, reg[MIPS_CP0_STATUS][0]); - BLANK(); } #ifdef CONFIG_MIPS_CPS diff --git a/arch/mips/kernel/branch.c b/arch/mips/kernel/branch.c index 6dc3f1fdaccc..46c227fc98f5 100644 --- a/arch/mips/kernel/branch.c +++ b/arch/mips/kernel/branch.c @@ -790,7 +790,7 @@ int __compute_return_epc_for_insn(struct pt_regs *regs, epc += 4 + (insn.i_format.simmediate << 2); regs->cp0_epc = epc; break; - case beqzcjic_op: + case pop66_op: if (!cpu_has_mips_r6) { ret = -SIGILL; break; @@ -798,7 +798,7 @@ int __compute_return_epc_for_insn(struct pt_regs *regs, /* Compact branch: BEQZC || JIC */ regs->cp0_epc += 8; break; - case bnezcjialc_op: + case pop76_op: if (!cpu_has_mips_r6) { ret = -SIGILL; break; @@ -809,8 +809,8 @@ int __compute_return_epc_for_insn(struct pt_regs *regs, regs->cp0_epc += 8; break; #endif - case cbcond0_op: - case cbcond1_op: + case pop10_op: + case pop30_op: /* Only valid for MIPS R6 */ if (!cpu_has_mips_r6) { ret = -SIGILL; diff --git a/arch/mips/kernel/traps.c b/arch/mips/kernel/traps.c index 4a1712b5abdf..6fb4704bd156 100644 --- a/arch/mips/kernel/traps.c +++ b/arch/mips/kernel/traps.c @@ -619,17 +619,17 @@ static int simulate_rdhwr(struct pt_regs *regs, int rd, int rt) perf_sw_event(PERF_COUNT_SW_EMULATION_FAULTS, 1, regs, 0); switch (rd) { - case 0: /* CPU number */ + case MIPS_HWR_CPUNUM: /* CPU number */ regs->regs[rt] = smp_processor_id(); return 0; - case 1: /* SYNCI length */ + case MIPS_HWR_SYNCISTEP: /* SYNCI length */ regs->regs[rt] = min(current_cpu_data.dcache.linesz, current_cpu_data.icache.linesz); return 0; - case 2: /* Read count register */ + case MIPS_HWR_CC: /* Read count register */ regs->regs[rt] = read_c0_count(); return 0; - case 3: /* Count register resolution */ + case MIPS_HWR_CCRES: /* Count register resolution */ switch (current_cpu_type()) { case CPU_20KC: case CPU_25KF: @@ -639,7 +639,7 @@ static int simulate_rdhwr(struct pt_regs *regs, int rd, int rt) regs->regs[rt] = 2; } return 0; - case 29: + case MIPS_HWR_ULR: /* Read UserLocal register */ regs->regs[rt] = ti->tp_value; return 0; default: @@ -1859,6 +1859,7 @@ void __noreturn nmi_exception_handler(struct pt_regs *regs) #define VECTORSPACING 0x100 /* for EI/VI mode */ unsigned long ebase; +EXPORT_SYMBOL_GPL(ebase); unsigned long exception_handlers[32]; unsigned long vi_handlers[64]; @@ -2063,16 +2064,22 @@ static void configure_status(void) status_set); } +unsigned int hwrena; +EXPORT_SYMBOL_GPL(hwrena); + /* configure HWRENA register */ static void configure_hwrena(void) { - unsigned int hwrena = cpu_hwrena_impl_bits; + hwrena = cpu_hwrena_impl_bits; if (cpu_has_mips_r2_r6) - hwrena |= 0x0000000f; + hwrena |= MIPS_HWRENA_CPUNUM | + MIPS_HWRENA_SYNCISTEP | + MIPS_HWRENA_CC | + MIPS_HWRENA_CCRES; if (!noulri && cpu_has_userlocal) - hwrena |= (1 << 29); + hwrena |= MIPS_HWRENA_ULR; if (hwrena) write_c0_hwrena(hwrena); diff --git a/arch/mips/kvm/Kconfig b/arch/mips/kvm/Kconfig index 2ae12825529f..7c56d6b124d1 100644 --- a/arch/mips/kvm/Kconfig +++ b/arch/mips/kvm/Kconfig @@ -17,6 +17,7 @@ if VIRTUALIZATION config KVM tristate "Kernel-based Virtual Machine (KVM) support" depends on HAVE_KVM + select EXPORT_UASM select PREEMPT_NOTIFIERS select ANON_INODES select KVM_MMIO diff --git a/arch/mips/kvm/Makefile b/arch/mips/kvm/Makefile index 637ebbebd549..847429de780d 100644 --- a/arch/mips/kvm/Makefile +++ b/arch/mips/kvm/Makefile @@ -7,9 +7,10 @@ EXTRA_CFLAGS += -Ivirt/kvm -Iarch/mips/kvm common-objs-$(CONFIG_CPU_HAS_MSA) += msa.o -kvm-objs := $(common-objs-y) mips.o emulate.o locore.o \ +kvm-objs := $(common-objs-y) mips.o emulate.o entry.o \ interrupt.o stats.o commpage.o \ dyntrans.o trap_emul.o fpu.o +kvm-objs += mmu.o obj-$(CONFIG_KVM) += kvm.o obj-y += callback.o tlb.o diff --git a/arch/mips/kvm/commpage.c b/arch/mips/kvm/commpage.c index 2d6e976d1add..a36b77e1705c 100644 --- a/arch/mips/kvm/commpage.c +++ b/arch/mips/kvm/commpage.c @@ -4,7 +4,7 @@ * for more details. * * commpage, currently used for Virtual COP0 registers. - * Mapped into the guest kernel @ 0x0. + * Mapped into the guest kernel @ KVM_GUEST_COMMPAGE_ADDR. * * Copyright (C) 2012 MIPS Technologies, Inc. All rights reserved. * Authors: Sanjay Lal <sanjayl@kymasys.com> diff --git a/arch/mips/kvm/dyntrans.c b/arch/mips/kvm/dyntrans.c index f1527a465c1b..d280894915ed 100644 --- a/arch/mips/kvm/dyntrans.c +++ b/arch/mips/kvm/dyntrans.c @@ -11,6 +11,7 @@ #include <linux/errno.h> #include <linux/err.h> +#include <linux/highmem.h> #include <linux/kvm_host.h> #include <linux/module.h> #include <linux/vmalloc.h> @@ -20,125 +21,114 @@ #include "commpage.h" -#define SYNCI_TEMPLATE 0x041f0000 -#define SYNCI_BASE(x) (((x) >> 21) & 0x1f) -#define SYNCI_OFFSET ((x) & 0xffff) +/** + * kvm_mips_trans_replace() - Replace trapping instruction in guest memory. + * @vcpu: Virtual CPU. + * @opc: PC of instruction to replace. + * @replace: Instruction to write + */ +static int kvm_mips_trans_replace(struct kvm_vcpu *vcpu, u32 *opc, + union mips_instruction replace) +{ + unsigned long paddr, flags; + void *vaddr; + + if (KVM_GUEST_KSEGX((unsigned long)opc) == KVM_GUEST_KSEG0) { + paddr = kvm_mips_translate_guest_kseg0_to_hpa(vcpu, + (unsigned long)opc); + vaddr = kmap_atomic(pfn_to_page(PHYS_PFN(paddr))); + vaddr += paddr & ~PAGE_MASK; + memcpy(vaddr, (void *)&replace, sizeof(u32)); + local_flush_icache_range((unsigned long)vaddr, + (unsigned long)vaddr + 32); + kunmap_atomic(vaddr); + } else if (KVM_GUEST_KSEGX((unsigned long) opc) == KVM_GUEST_KSEG23) { + local_irq_save(flags); + memcpy((void *)opc, (void *)&replace, sizeof(u32)); + local_flush_icache_range((unsigned long)opc, + (unsigned long)opc + 32); + local_irq_restore(flags); + } else { + kvm_err("%s: Invalid address: %p\n", __func__, opc); + return -EFAULT; + } -#define LW_TEMPLATE 0x8c000000 -#define CLEAR_TEMPLATE 0x00000020 -#define SW_TEMPLATE 0xac000000 + return 0; +} -int kvm_mips_trans_cache_index(uint32_t inst, uint32_t *opc, +int kvm_mips_trans_cache_index(union mips_instruction inst, u32 *opc, struct kvm_vcpu *vcpu) { - int result = 0; - unsigned long kseg0_opc; - uint32_t synci_inst = 0x0; + union mips_instruction nop_inst = { 0 }; /* Replace the CACHE instruction, with a NOP */ - kseg0_opc = - CKSEG0ADDR(kvm_mips_translate_guest_kseg0_to_hpa - (vcpu, (unsigned long) opc)); - memcpy((void *)kseg0_opc, (void *)&synci_inst, sizeof(uint32_t)); - local_flush_icache_range(kseg0_opc, kseg0_opc + 32); - - return result; + return kvm_mips_trans_replace(vcpu, opc, nop_inst); } /* * Address based CACHE instructions are transformed into synci(s). A little * heavy for just D-cache invalidates, but avoids an expensive trap */ -int kvm_mips_trans_cache_va(uint32_t inst, uint32_t *opc, +int kvm_mips_trans_cache_va(union mips_instruction inst, u32 *opc, struct kvm_vcpu *vcpu) { - int result = 0; - unsigned long kseg0_opc; - uint32_t synci_inst = SYNCI_TEMPLATE, base, offset; - - base = (inst >> 21) & 0x1f; - offset = inst & 0xffff; - synci_inst |= (base << 21); - synci_inst |= offset; - - kseg0_opc = - CKSEG0ADDR(kvm_mips_translate_guest_kseg0_to_hpa - (vcpu, (unsigned long) opc)); - memcpy((void *)kseg0_opc, (void *)&synci_inst, sizeof(uint32_t)); - local_flush_icache_range(kseg0_opc, kseg0_opc + 32); - - return result; + union mips_instruction synci_inst = { 0 }; + + synci_inst.i_format.opcode = bcond_op; + synci_inst.i_format.rs = inst.i_format.rs; + synci_inst.i_format.rt = synci_op; + if (cpu_has_mips_r6) + synci_inst.i_format.simmediate = inst.spec3_format.simmediate; + else + synci_inst.i_format.simmediate = inst.i_format.simmediate; + + return kvm_mips_trans_replace(vcpu, opc, synci_inst); } -int kvm_mips_trans_mfc0(uint32_t inst, uint32_t *opc, struct kvm_vcpu *vcpu) +int kvm_mips_trans_mfc0(union mips_instruction inst, u32 *opc, + struct kvm_vcpu *vcpu) { - int32_t rt, rd, sel; - uint32_t mfc0_inst; - unsigned long kseg0_opc, flags; - - rt = (inst >> 16) & 0x1f; - rd = (inst >> 11) & 0x1f; - sel = inst & 0x7; + union mips_instruction mfc0_inst = { 0 }; + u32 rd, sel; - if ((rd == MIPS_CP0_ERRCTL) && (sel == 0)) { - mfc0_inst = CLEAR_TEMPLATE; - mfc0_inst |= ((rt & 0x1f) << 16); - } else { - mfc0_inst = LW_TEMPLATE; - mfc0_inst |= ((rt & 0x1f) << 16); - mfc0_inst |= offsetof(struct kvm_mips_commpage, - cop0.reg[rd][sel]); - } + rd = inst.c0r_format.rd; + sel = inst.c0r_format.sel; - if (KVM_GUEST_KSEGX(opc) == KVM_GUEST_KSEG0) { - kseg0_opc = - CKSEG0ADDR(kvm_mips_translate_guest_kseg0_to_hpa - (vcpu, (unsigned long) opc)); - memcpy((void *)kseg0_opc, (void *)&mfc0_inst, sizeof(uint32_t)); - local_flush_icache_range(kseg0_opc, kseg0_opc + 32); - } else if (KVM_GUEST_KSEGX((unsigned long) opc) == KVM_GUEST_KSEG23) { - local_irq_save(flags); - memcpy((void *)opc, (void *)&mfc0_inst, sizeof(uint32_t)); - local_flush_icache_range((unsigned long)opc, - (unsigned long)opc + 32); - local_irq_restore(flags); + if (rd == MIPS_CP0_ERRCTL && sel == 0) { + mfc0_inst.r_format.opcode = spec_op; + mfc0_inst.r_format.rd = inst.c0r_format.rt; + mfc0_inst.r_format.func = add_op; } else { - kvm_err("%s: Invalid address: %p\n", __func__, opc); - return -EFAULT; + mfc0_inst.i_format.opcode = lw_op; + mfc0_inst.i_format.rt = inst.c0r_format.rt; + mfc0_inst.i_format.simmediate = KVM_GUEST_COMMPAGE_ADDR | + offsetof(struct kvm_mips_commpage, cop0.reg[rd][sel]); +#ifdef CONFIG_CPU_BIG_ENDIAN + if (sizeof(vcpu->arch.cop0->reg[0][0]) == 8) + mfc0_inst.i_format.simmediate |= 4; +#endif } - return 0; + return kvm_mips_trans_replace(vcpu, opc, mfc0_inst); } -int kvm_mips_trans_mtc0(uint32_t inst, uint32_t *opc, struct kvm_vcpu *vcpu) +int kvm_mips_trans_mtc0(union mips_instruction inst, u32 *opc, + struct kvm_vcpu *vcpu) { - int32_t rt, rd, sel; - uint32_t mtc0_inst = SW_TEMPLATE; - unsigned long kseg0_opc, flags; - - rt = (inst >> 16) & 0x1f; - rd = (inst >> 11) & 0x1f; - sel = inst & 0x7; - - mtc0_inst |= ((rt & 0x1f) << 16); - mtc0_inst |= offsetof(struct kvm_mips_commpage, cop0.reg[rd][sel]); - - if (KVM_GUEST_KSEGX(opc) == KVM_GUEST_KSEG0) { - kseg0_opc = - CKSEG0ADDR(kvm_mips_translate_guest_kseg0_to_hpa - (vcpu, (unsigned long) opc)); - memcpy((void *)kseg0_opc, (void *)&mtc0_inst, sizeof(uint32_t)); - local_flush_icache_range(kseg0_opc, kseg0_opc + 32); - } else if (KVM_GUEST_KSEGX((unsigned long) opc) == KVM_GUEST_KSEG23) { - local_irq_save(flags); - memcpy((void *)opc, (void *)&mtc0_inst, sizeof(uint32_t)); - local_flush_icache_range((unsigned long)opc, - (unsigned long)opc + 32); - local_irq_restore(flags); - } else { - kvm_err("%s: Invalid address: %p\n", __func__, opc); - return -EFAULT; - } - - return 0; + union mips_instruction mtc0_inst = { 0 }; + u32 rd, sel; + + rd = inst.c0r_format.rd; + sel = inst.c0r_format.sel; + + mtc0_inst.i_format.opcode = sw_op; + mtc0_inst.i_format.rt = inst.c0r_format.rt; + mtc0_inst.i_format.simmediate = KVM_GUEST_COMMPAGE_ADDR | + offsetof(struct kvm_mips_commpage, cop0.reg[rd][sel]); +#ifdef CONFIG_CPU_BIG_ENDIAN + if (sizeof(vcpu->arch.cop0->reg[0][0]) == 8) + mtc0_inst.i_format.simmediate |= 4; +#endif + + return kvm_mips_trans_replace(vcpu, opc, mtc0_inst); } diff --git a/arch/mips/kvm/emulate.c b/arch/mips/kvm/emulate.c index 645c8a1982a7..6eb52b9c9818 100644 --- a/arch/mips/kvm/emulate.c +++ b/arch/mips/kvm/emulate.c @@ -52,7 +52,7 @@ unsigned long kvm_compute_return_epc(struct kvm_vcpu *vcpu, goto unaligned; /* Read the instruction */ - insn.word = kvm_get_inst((uint32_t *) epc, vcpu); + insn.word = kvm_get_inst((u32 *) epc, vcpu); if (insn.word == KVM_INVALID_INST) return KVM_INVALID_INST; @@ -161,9 +161,12 @@ unsigned long kvm_compute_return_epc(struct kvm_vcpu *vcpu, nextpc = epc; break; - case blez_op: /* not really i_format */ - case blezl_op: - /* rt field assumed to be zero */ + case blez_op: /* POP06 */ +#ifndef CONFIG_CPU_MIPSR6 + case blezl_op: /* removed in R6 */ +#endif + if (insn.i_format.rt != 0) + goto compact_branch; if ((long)arch->gprs[insn.i_format.rs] <= 0) epc = epc + 4 + (insn.i_format.simmediate << 2); else @@ -171,9 +174,12 @@ unsigned long kvm_compute_return_epc(struct kvm_vcpu *vcpu, nextpc = epc; break; - case bgtz_op: - case bgtzl_op: - /* rt field assumed to be zero */ + case bgtz_op: /* POP07 */ +#ifndef CONFIG_CPU_MIPSR6 + case bgtzl_op: /* removed in R6 */ +#endif + if (insn.i_format.rt != 0) + goto compact_branch; if ((long)arch->gprs[insn.i_format.rs] > 0) epc = epc + 4 + (insn.i_format.simmediate << 2); else @@ -185,6 +191,40 @@ unsigned long kvm_compute_return_epc(struct kvm_vcpu *vcpu, case cop1_op: kvm_err("%s: unsupported cop1_op\n", __func__); break; + +#ifdef CONFIG_CPU_MIPSR6 + /* R6 added the following compact branches with forbidden slots */ + case blezl_op: /* POP26 */ + case bgtzl_op: /* POP27 */ + /* only rt == 0 isn't compact branch */ + if (insn.i_format.rt != 0) + goto compact_branch; + break; + case pop10_op: + case pop30_op: + /* only rs == rt == 0 is reserved, rest are compact branches */ + if (insn.i_format.rs != 0 || insn.i_format.rt != 0) + goto compact_branch; + break; + case pop66_op: + case pop76_op: + /* only rs == 0 isn't compact branch */ + if (insn.i_format.rs != 0) + goto compact_branch; + break; +compact_branch: + /* + * If we've hit an exception on the forbidden slot, then + * the branch must not have been taken. + */ + epc += 8; + nextpc = epc; + break; +#else +compact_branch: + /* Compact branches not supported before R6 */ + break; +#endif } return nextpc; @@ -198,7 +238,7 @@ sigill: return nextpc; } -enum emulation_result update_pc(struct kvm_vcpu *vcpu, uint32_t cause) +enum emulation_result update_pc(struct kvm_vcpu *vcpu, u32 cause) { unsigned long branch_pc; enum emulation_result er = EMULATE_DONE; @@ -243,7 +283,7 @@ static inline int kvm_mips_count_disabled(struct kvm_vcpu *vcpu) * * Assumes !kvm_mips_count_disabled(@vcpu) (guest CP0_Count timer is running). */ -static uint32_t kvm_mips_ktime_to_count(struct kvm_vcpu *vcpu, ktime_t now) +static u32 kvm_mips_ktime_to_count(struct kvm_vcpu *vcpu, ktime_t now) { s64 now_ns, periods; u64 delta; @@ -300,11 +340,11 @@ static inline ktime_t kvm_mips_count_time(struct kvm_vcpu *vcpu) * * Returns: The current value of the guest CP0_Count register. */ -static uint32_t kvm_mips_read_count_running(struct kvm_vcpu *vcpu, ktime_t now) +static u32 kvm_mips_read_count_running(struct kvm_vcpu *vcpu, ktime_t now) { struct mips_coproc *cop0 = vcpu->arch.cop0; ktime_t expires, threshold; - uint32_t count, compare; + u32 count, compare; int running; /* Calculate the biased and scaled guest CP0_Count */ @@ -315,7 +355,7 @@ static uint32_t kvm_mips_read_count_running(struct kvm_vcpu *vcpu, ktime_t now) * Find whether CP0_Count has reached the closest timer interrupt. If * not, we shouldn't inject it. */ - if ((int32_t)(count - compare) < 0) + if ((s32)(count - compare) < 0) return count; /* @@ -360,7 +400,7 @@ static uint32_t kvm_mips_read_count_running(struct kvm_vcpu *vcpu, ktime_t now) * * Returns: The current guest CP0_Count value. */ -uint32_t kvm_mips_read_count(struct kvm_vcpu *vcpu) +u32 kvm_mips_read_count(struct kvm_vcpu *vcpu) { struct mips_coproc *cop0 = vcpu->arch.cop0; @@ -387,8 +427,7 @@ uint32_t kvm_mips_read_count(struct kvm_vcpu *vcpu) * * Returns: The ktime at the point of freeze. */ -static ktime_t kvm_mips_freeze_hrtimer(struct kvm_vcpu *vcpu, - uint32_t *count) +static ktime_t kvm_mips_freeze_hrtimer(struct kvm_vcpu *vcpu, u32 *count) { ktime_t now; @@ -419,16 +458,16 @@ static ktime_t kvm_mips_freeze_hrtimer(struct kvm_vcpu *vcpu, * Assumes !kvm_mips_count_disabled(@vcpu) (guest CP0_Count timer is running). */ static void kvm_mips_resume_hrtimer(struct kvm_vcpu *vcpu, - ktime_t now, uint32_t count) + ktime_t now, u32 count) { struct mips_coproc *cop0 = vcpu->arch.cop0; - uint32_t compare; + u32 compare; u64 delta; ktime_t expire; /* Calculate timeout (wrap 0 to 2^32) */ compare = kvm_read_c0_guest_compare(cop0); - delta = (u64)(uint32_t)(compare - count - 1) + 1; + delta = (u64)(u32)(compare - count - 1) + 1; delta = div_u64(delta * NSEC_PER_SEC, vcpu->arch.count_hz); expire = ktime_add_ns(now, delta); @@ -444,7 +483,7 @@ static void kvm_mips_resume_hrtimer(struct kvm_vcpu *vcpu, * * Sets the CP0_Count value and updates the timer accordingly. */ -void kvm_mips_write_count(struct kvm_vcpu *vcpu, uint32_t count) +void kvm_mips_write_count(struct kvm_vcpu *vcpu, u32 count) { struct mips_coproc *cop0 = vcpu->arch.cop0; ktime_t now; @@ -538,13 +577,13 @@ int kvm_mips_set_count_hz(struct kvm_vcpu *vcpu, s64 count_hz) * If @ack, atomically acknowledge any pending timer interrupt, otherwise ensure * any pending timer interrupt is preserved. */ -void kvm_mips_write_compare(struct kvm_vcpu *vcpu, uint32_t compare, bool ack) +void kvm_mips_write_compare(struct kvm_vcpu *vcpu, u32 compare, bool ack) { struct mips_coproc *cop0 = vcpu->arch.cop0; int dc; u32 old_compare = kvm_read_c0_guest_compare(cop0); ktime_t now; - uint32_t count; + u32 count; /* if unchanged, must just be an ack */ if (old_compare == compare) { @@ -585,7 +624,7 @@ void kvm_mips_write_compare(struct kvm_vcpu *vcpu, uint32_t compare, bool ack) static ktime_t kvm_mips_count_disable(struct kvm_vcpu *vcpu) { struct mips_coproc *cop0 = vcpu->arch.cop0; - uint32_t count; + u32 count; ktime_t now; /* Stop hrtimer */ @@ -632,7 +671,7 @@ void kvm_mips_count_disable_cause(struct kvm_vcpu *vcpu) void kvm_mips_count_enable_cause(struct kvm_vcpu *vcpu) { struct mips_coproc *cop0 = vcpu->arch.cop0; - uint32_t count; + u32 count; kvm_clear_c0_guest_cause(cop0, CAUSEF_DC); @@ -661,7 +700,7 @@ int kvm_mips_set_count_ctl(struct kvm_vcpu *vcpu, s64 count_ctl) s64 changed = count_ctl ^ vcpu->arch.count_ctl; s64 delta; ktime_t expire, now; - uint32_t count, compare; + u32 count, compare; /* Only allow defined bits to be changed */ if (changed & ~(s64)(KVM_REG_MIPS_COUNT_CTL_DC)) @@ -687,7 +726,7 @@ int kvm_mips_set_count_ctl(struct kvm_vcpu *vcpu, s64 count_ctl) */ count = kvm_read_c0_guest_count(cop0); compare = kvm_read_c0_guest_compare(cop0); - delta = (u64)(uint32_t)(compare - count - 1) + 1; + delta = (u64)(u32)(compare - count - 1) + 1; delta = div_u64(delta * NSEC_PER_SEC, vcpu->arch.count_hz); expire = ktime_add_ns(vcpu->arch.count_resume, delta); @@ -776,7 +815,7 @@ enum emulation_result kvm_mips_emul_wait(struct kvm_vcpu *vcpu) vcpu->arch.pending_exceptions); ++vcpu->stat.wait_exits; - trace_kvm_exit(vcpu, WAIT_EXITS); + trace_kvm_exit(vcpu, KVM_TRACE_EXIT_WAIT); if (!vcpu->arch.pending_exceptions) { vcpu->arch.wait = 1; kvm_vcpu_block(vcpu); @@ -801,9 +840,9 @@ enum emulation_result kvm_mips_emul_wait(struct kvm_vcpu *vcpu) enum emulation_result kvm_mips_emul_tlbr(struct kvm_vcpu *vcpu) { struct mips_coproc *cop0 = vcpu->arch.cop0; - uint32_t pc = vcpu->arch.pc; + unsigned long pc = vcpu->arch.pc; - kvm_err("[%#x] COP0_TLBR [%ld]\n", pc, kvm_read_c0_guest_index(cop0)); + kvm_err("[%#lx] COP0_TLBR [%ld]\n", pc, kvm_read_c0_guest_index(cop0)); return EMULATE_FAIL; } @@ -813,11 +852,11 @@ enum emulation_result kvm_mips_emul_tlbwi(struct kvm_vcpu *vcpu) struct mips_coproc *cop0 = vcpu->arch.cop0; int index = kvm_read_c0_guest_index(cop0); struct kvm_mips_tlb *tlb = NULL; - uint32_t pc = vcpu->arch.pc; + unsigned long pc = vcpu->arch.pc; if (index < 0 || index >= KVM_MIPS_GUEST_TLB_SIZE) { kvm_debug("%s: illegal index: %d\n", __func__, index); - kvm_debug("[%#x] COP0_TLBWI [%d] (entryhi: %#lx, entrylo0: %#lx entrylo1: %#lx, mask: %#lx)\n", + kvm_debug("[%#lx] COP0_TLBWI [%d] (entryhi: %#lx, entrylo0: %#lx entrylo1: %#lx, mask: %#lx)\n", pc, index, kvm_read_c0_guest_entryhi(cop0), kvm_read_c0_guest_entrylo0(cop0), kvm_read_c0_guest_entrylo1(cop0), @@ -834,10 +873,10 @@ enum emulation_result kvm_mips_emul_tlbwi(struct kvm_vcpu *vcpu) tlb->tlb_mask = kvm_read_c0_guest_pagemask(cop0); tlb->tlb_hi = kvm_read_c0_guest_entryhi(cop0); - tlb->tlb_lo0 = kvm_read_c0_guest_entrylo0(cop0); - tlb->tlb_lo1 = kvm_read_c0_guest_entrylo1(cop0); + tlb->tlb_lo[0] = kvm_read_c0_guest_entrylo0(cop0); + tlb->tlb_lo[1] = kvm_read_c0_guest_entrylo1(cop0); - kvm_debug("[%#x] COP0_TLBWI [%d] (entryhi: %#lx, entrylo0: %#lx entrylo1: %#lx, mask: %#lx)\n", + kvm_debug("[%#lx] COP0_TLBWI [%d] (entryhi: %#lx, entrylo0: %#lx entrylo1: %#lx, mask: %#lx)\n", pc, index, kvm_read_c0_guest_entryhi(cop0), kvm_read_c0_guest_entrylo0(cop0), kvm_read_c0_guest_entrylo1(cop0), @@ -851,7 +890,7 @@ enum emulation_result kvm_mips_emul_tlbwr(struct kvm_vcpu *vcpu) { struct mips_coproc *cop0 = vcpu->arch.cop0; struct kvm_mips_tlb *tlb = NULL; - uint32_t pc = vcpu->arch.pc; + unsigned long pc = vcpu->arch.pc; int index; get_random_bytes(&index, sizeof(index)); @@ -867,10 +906,10 @@ enum emulation_result kvm_mips_emul_tlbwr(struct kvm_vcpu *vcpu) tlb->tlb_mask = kvm_read_c0_guest_pagemask(cop0); tlb->tlb_hi = kvm_read_c0_guest_entryhi(cop0); - tlb->tlb_lo0 = kvm_read_c0_guest_entrylo0(cop0); - tlb->tlb_lo1 = kvm_read_c0_guest_entrylo1(cop0); + tlb->tlb_lo[0] = kvm_read_c0_guest_entrylo0(cop0); + tlb->tlb_lo[1] = kvm_read_c0_guest_entrylo1(cop0); - kvm_debug("[%#x] COP0_TLBWR[%d] (entryhi: %#lx, entrylo0: %#lx entrylo1: %#lx)\n", + kvm_debug("[%#lx] COP0_TLBWR[%d] (entryhi: %#lx, entrylo0: %#lx entrylo1: %#lx)\n", pc, index, kvm_read_c0_guest_entryhi(cop0), kvm_read_c0_guest_entrylo0(cop0), kvm_read_c0_guest_entrylo1(cop0)); @@ -882,14 +921,14 @@ enum emulation_result kvm_mips_emul_tlbp(struct kvm_vcpu *vcpu) { struct mips_coproc *cop0 = vcpu->arch.cop0; long entryhi = kvm_read_c0_guest_entryhi(cop0); - uint32_t pc = vcpu->arch.pc; + unsigned long pc = vcpu->arch.pc; int index = -1; index = kvm_mips_guest_tlb_lookup(vcpu, entryhi); kvm_write_c0_guest_index(cop0, index); - kvm_debug("[%#x] COP0_TLBP (entryhi: %#lx), index: %d\n", pc, entryhi, + kvm_debug("[%#lx] COP0_TLBP (entryhi: %#lx), index: %d\n", pc, entryhi, index); return EMULATE_DONE; @@ -922,8 +961,8 @@ unsigned int kvm_mips_config1_wrmask(struct kvm_vcpu *vcpu) */ unsigned int kvm_mips_config3_wrmask(struct kvm_vcpu *vcpu) { - /* Config4 is optional */ - unsigned int mask = MIPS_CONF_M; + /* Config4 and ULRI are optional */ + unsigned int mask = MIPS_CONF_M | MIPS_CONF3_ULRI; /* Permit MSA to be present if MSA is supported */ if (kvm_mips_guest_can_have_msa(&vcpu->arch)) @@ -942,7 +981,12 @@ unsigned int kvm_mips_config3_wrmask(struct kvm_vcpu *vcpu) unsigned int kvm_mips_config4_wrmask(struct kvm_vcpu *vcpu) { /* Config5 is optional */ - return MIPS_CONF_M; + unsigned int mask = MIPS_CONF_M; + + /* KScrExist */ + mask |= (unsigned int)vcpu->arch.kscratch_enabled << 16; + + return mask; } /** @@ -973,14 +1017,14 @@ unsigned int kvm_mips_config5_wrmask(struct kvm_vcpu *vcpu) return mask; } -enum emulation_result kvm_mips_emulate_CP0(uint32_t inst, uint32_t *opc, - uint32_t cause, struct kvm_run *run, +enum emulation_result kvm_mips_emulate_CP0(union mips_instruction inst, + u32 *opc, u32 cause, + struct kvm_run *run, struct kvm_vcpu *vcpu) { struct mips_coproc *cop0 = vcpu->arch.cop0; enum emulation_result er = EMULATE_DONE; - int32_t rt, rd, copz, sel, co_bit, op; - uint32_t pc = vcpu->arch.pc; + u32 rt, rd, sel; unsigned long curr_pc; /* @@ -992,16 +1036,8 @@ enum emulation_result kvm_mips_emulate_CP0(uint32_t inst, uint32_t *opc, if (er == EMULATE_FAIL) return er; - copz = (inst >> 21) & 0x1f; - rt = (inst >> 16) & 0x1f; - rd = (inst >> 11) & 0x1f; - sel = inst & 0x7; - co_bit = (inst >> 25) & 1; - - if (co_bit) { - op = (inst) & 0xff; - - switch (op) { + if (inst.co_format.co) { + switch (inst.co_format.func) { case tlbr_op: /* Read indexed TLB entry */ er = kvm_mips_emul_tlbr(vcpu); break; @@ -1020,47 +1056,58 @@ enum emulation_result kvm_mips_emulate_CP0(uint32_t inst, uint32_t *opc, case eret_op: er = kvm_mips_emul_eret(vcpu); goto dont_update_pc; - break; case wait_op: er = kvm_mips_emul_wait(vcpu); break; } } else { - switch (copz) { + rt = inst.c0r_format.rt; + rd = inst.c0r_format.rd; + sel = inst.c0r_format.sel; + + switch (inst.c0r_format.rs) { case mfc_op: #ifdef CONFIG_KVM_MIPS_DEBUG_COP0_COUNTERS cop0->stat[rd][sel]++; #endif /* Get reg */ if ((rd == MIPS_CP0_COUNT) && (sel == 0)) { - vcpu->arch.gprs[rt] = kvm_mips_read_count(vcpu); + vcpu->arch.gprs[rt] = + (s32)kvm_mips_read_count(vcpu); } else if ((rd == MIPS_CP0_ERRCTL) && (sel == 0)) { vcpu->arch.gprs[rt] = 0x0; #ifdef CONFIG_KVM_MIPS_DYN_TRANS kvm_mips_trans_mfc0(inst, opc, vcpu); #endif } else { - vcpu->arch.gprs[rt] = cop0->reg[rd][sel]; + vcpu->arch.gprs[rt] = (s32)cop0->reg[rd][sel]; #ifdef CONFIG_KVM_MIPS_DYN_TRANS kvm_mips_trans_mfc0(inst, opc, vcpu); #endif } - kvm_debug - ("[%#x] MFCz[%d][%d], vcpu->arch.gprs[%d]: %#lx\n", - pc, rd, sel, rt, vcpu->arch.gprs[rt]); - + trace_kvm_hwr(vcpu, KVM_TRACE_MFC0, + KVM_TRACE_COP0(rd, sel), + vcpu->arch.gprs[rt]); break; case dmfc_op: vcpu->arch.gprs[rt] = cop0->reg[rd][sel]; + + trace_kvm_hwr(vcpu, KVM_TRACE_DMFC0, + KVM_TRACE_COP0(rd, sel), + vcpu->arch.gprs[rt]); break; case mtc_op: #ifdef CONFIG_KVM_MIPS_DEBUG_COP0_COUNTERS cop0->stat[rd][sel]++; #endif + trace_kvm_hwr(vcpu, KVM_TRACE_MTC0, + KVM_TRACE_COP0(rd, sel), + vcpu->arch.gprs[rt]); + if ((rd == MIPS_CP0_TLB_INDEX) && (vcpu->arch.gprs[rt] >= KVM_MIPS_GUEST_TLB_SIZE)) { @@ -1078,16 +1125,15 @@ enum emulation_result kvm_mips_emulate_CP0(uint32_t inst, uint32_t *opc, kvm_err("MTCz, cop0->reg[EBASE]: %#lx\n", kvm_read_c0_guest_ebase(cop0)); } else if (rd == MIPS_CP0_TLB_HI && sel == 0) { - uint32_t nasid = + u32 nasid = vcpu->arch.gprs[rt] & KVM_ENTRYHI_ASID; if ((KSEGX(vcpu->arch.gprs[rt]) != CKSEG0) && ((kvm_read_c0_guest_entryhi(cop0) & KVM_ENTRYHI_ASID) != nasid)) { - kvm_debug("MTCz, change ASID from %#lx to %#lx\n", + trace_kvm_asid_change(vcpu, kvm_read_c0_guest_entryhi(cop0) - & KVM_ENTRYHI_ASID, - vcpu->arch.gprs[rt] - & KVM_ENTRYHI_ASID); + & KVM_ENTRYHI_ASID, + nasid); /* Blow away the shadow host TLBs */ kvm_mips_flush_host_tlb(1); @@ -1100,10 +1146,6 @@ enum emulation_result kvm_mips_emulate_CP0(uint32_t inst, uint32_t *opc, kvm_mips_write_count(vcpu, vcpu->arch.gprs[rt]); goto done; } else if ((rd == MIPS_CP0_COMPARE) && (sel == 0)) { - kvm_debug("[%#x] MTCz, COMPARE %#lx <- %#lx\n", - pc, kvm_read_c0_guest_compare(cop0), - vcpu->arch.gprs[rt]); - /* If we are writing to COMPARE */ /* Clear pending timer interrupt, if any */ kvm_mips_write_compare(vcpu, @@ -1155,7 +1197,7 @@ enum emulation_result kvm_mips_emulate_CP0(uint32_t inst, uint32_t *opc, * it first. */ if (change & ST0_CU1 && !(val & ST0_FR) && - vcpu->arch.fpu_inuse & KVM_MIPS_FPU_MSA) + vcpu->arch.aux_inuse & KVM_MIPS_AUX_MSA) kvm_lose_fpu(vcpu); /* @@ -1166,7 +1208,7 @@ enum emulation_result kvm_mips_emulate_CP0(uint32_t inst, uint32_t *opc, * the near future. */ if (change & ST0_CU1 && - vcpu->arch.fpu_inuse & KVM_MIPS_FPU_FPU) + vcpu->arch.aux_inuse & KVM_MIPS_AUX_FPU) change_c0_status(ST0_CU1, val); preempt_enable(); @@ -1201,7 +1243,7 @@ enum emulation_result kvm_mips_emulate_CP0(uint32_t inst, uint32_t *opc, * context is already loaded. */ if (change & MIPS_CONF5_FRE && - vcpu->arch.fpu_inuse & KVM_MIPS_FPU_FPU) + vcpu->arch.aux_inuse & KVM_MIPS_AUX_FPU) change_c0_config5(MIPS_CONF5_FRE, val); /* @@ -1211,7 +1253,7 @@ enum emulation_result kvm_mips_emulate_CP0(uint32_t inst, uint32_t *opc, * quickly enabled again in the near future. */ if (change & MIPS_CONF5_MSAEN && - vcpu->arch.fpu_inuse & KVM_MIPS_FPU_MSA) + vcpu->arch.aux_inuse & KVM_MIPS_AUX_MSA) change_c0_config5(MIPS_CONF5_MSAEN, val); @@ -1219,7 +1261,7 @@ enum emulation_result kvm_mips_emulate_CP0(uint32_t inst, uint32_t *opc, kvm_write_c0_guest_config5(cop0, val); } else if ((rd == MIPS_CP0_CAUSE) && (sel == 0)) { - uint32_t old_cause, new_cause; + u32 old_cause, new_cause; old_cause = kvm_read_c0_guest_cause(cop0); new_cause = vcpu->arch.gprs[rt]; @@ -1233,20 +1275,30 @@ enum emulation_result kvm_mips_emulate_CP0(uint32_t inst, uint32_t *opc, else kvm_mips_count_enable_cause(vcpu); } + } else if ((rd == MIPS_CP0_HWRENA) && (sel == 0)) { + u32 mask = MIPS_HWRENA_CPUNUM | + MIPS_HWRENA_SYNCISTEP | + MIPS_HWRENA_CC | + MIPS_HWRENA_CCRES; + + if (kvm_read_c0_guest_config3(cop0) & + MIPS_CONF3_ULRI) + mask |= MIPS_HWRENA_ULR; + cop0->reg[rd][sel] = vcpu->arch.gprs[rt] & mask; } else { cop0->reg[rd][sel] = vcpu->arch.gprs[rt]; #ifdef CONFIG_KVM_MIPS_DYN_TRANS kvm_mips_trans_mtc0(inst, opc, vcpu); #endif } - - kvm_debug("[%#x] MTCz, cop0->reg[%d][%d]: %#lx\n", pc, - rd, sel, cop0->reg[rd][sel]); break; case dmtc_op: kvm_err("!!!!!!![%#lx]dmtc_op: rt: %d, rd: %d, sel: %d!!!!!!\n", vcpu->arch.pc, rt, rd, sel); + trace_kvm_hwr(vcpu, KVM_TRACE_DMTC0, + KVM_TRACE_COP0(rd, sel), + vcpu->arch.gprs[rt]); er = EMULATE_FAIL; break; @@ -1258,7 +1310,7 @@ enum emulation_result kvm_mips_emulate_CP0(uint32_t inst, uint32_t *opc, vcpu->arch.gprs[rt] = kvm_read_c0_guest_status(cop0); /* EI */ - if (inst & 0x20) { + if (inst.mfmc0_format.sc) { kvm_debug("[%#lx] mfmc0_op: EI\n", vcpu->arch.pc); kvm_set_c0_guest_status(cop0, ST0_IE); @@ -1272,9 +1324,8 @@ enum emulation_result kvm_mips_emulate_CP0(uint32_t inst, uint32_t *opc, case wrpgpr_op: { - uint32_t css = - cop0->reg[MIPS_CP0_STATUS][2] & 0xf; - uint32_t pss = + u32 css = cop0->reg[MIPS_CP0_STATUS][2] & 0xf; + u32 pss = (cop0->reg[MIPS_CP0_STATUS][2] >> 6) & 0xf; /* * We don't support any shadow register sets, so @@ -1291,7 +1342,7 @@ enum emulation_result kvm_mips_emulate_CP0(uint32_t inst, uint32_t *opc, break; default: kvm_err("[%#lx]MachEmulateCP0: unsupported COP0, copz: 0x%x\n", - vcpu->arch.pc, copz); + vcpu->arch.pc, inst.c0r_format.rs); er = EMULATE_FAIL; break; } @@ -1312,13 +1363,14 @@ dont_update_pc: return er; } -enum emulation_result kvm_mips_emulate_store(uint32_t inst, uint32_t cause, +enum emulation_result kvm_mips_emulate_store(union mips_instruction inst, + u32 cause, struct kvm_run *run, struct kvm_vcpu *vcpu) { enum emulation_result er = EMULATE_DO_MMIO; - int32_t op, base, rt, offset; - uint32_t bytes; + u32 rt; + u32 bytes; void *data = run->mmio.data; unsigned long curr_pc; @@ -1331,12 +1383,9 @@ enum emulation_result kvm_mips_emulate_store(uint32_t inst, uint32_t cause, if (er == EMULATE_FAIL) return er; - rt = (inst >> 16) & 0x1f; - base = (inst >> 21) & 0x1f; - offset = inst & 0xffff; - op = (inst >> 26) & 0x3f; + rt = inst.i_format.rt; - switch (op) { + switch (inst.i_format.opcode) { case sb_op: bytes = 1; if (bytes > sizeof(run->mmio.data)) { @@ -1357,7 +1406,7 @@ enum emulation_result kvm_mips_emulate_store(uint32_t inst, uint32_t cause, *(u8 *) data = vcpu->arch.gprs[rt]; kvm_debug("OP_SB: eaddr: %#lx, gpr: %#lx, data: %#x\n", vcpu->arch.host_cp0_badvaddr, vcpu->arch.gprs[rt], - *(uint8_t *) data); + *(u8 *) data); break; @@ -1379,11 +1428,11 @@ enum emulation_result kvm_mips_emulate_store(uint32_t inst, uint32_t cause, run->mmio.is_write = 1; vcpu->mmio_needed = 1; vcpu->mmio_is_write = 1; - *(uint32_t *) data = vcpu->arch.gprs[rt]; + *(u32 *) data = vcpu->arch.gprs[rt]; kvm_debug("[%#lx] OP_SW: eaddr: %#lx, gpr: %#lx, data: %#x\n", vcpu->arch.pc, vcpu->arch.host_cp0_badvaddr, - vcpu->arch.gprs[rt], *(uint32_t *) data); + vcpu->arch.gprs[rt], *(u32 *) data); break; case sh_op: @@ -1404,15 +1453,16 @@ enum emulation_result kvm_mips_emulate_store(uint32_t inst, uint32_t cause, run->mmio.is_write = 1; vcpu->mmio_needed = 1; vcpu->mmio_is_write = 1; - *(uint16_t *) data = vcpu->arch.gprs[rt]; + *(u16 *) data = vcpu->arch.gprs[rt]; kvm_debug("[%#lx] OP_SH: eaddr: %#lx, gpr: %#lx, data: %#x\n", vcpu->arch.pc, vcpu->arch.host_cp0_badvaddr, - vcpu->arch.gprs[rt], *(uint32_t *) data); + vcpu->arch.gprs[rt], *(u32 *) data); break; default: - kvm_err("Store not yet supported"); + kvm_err("Store not yet supported (inst=0x%08x)\n", + inst.word); er = EMULATE_FAIL; break; } @@ -1424,18 +1474,16 @@ enum emulation_result kvm_mips_emulate_store(uint32_t inst, uint32_t cause, return er; } -enum emulation_result kvm_mips_emulate_load(uint32_t inst, uint32_t cause, - struct kvm_run *run, +enum emulation_result kvm_mips_emulate_load(union mips_instruction inst, + u32 cause, struct kvm_run *run, struct kvm_vcpu *vcpu) { enum emulation_result er = EMULATE_DO_MMIO; - int32_t op, base, rt, offset; - uint32_t bytes; + u32 op, rt; + u32 bytes; - rt = (inst >> 16) & 0x1f; - base = (inst >> 21) & 0x1f; - offset = inst & 0xffff; - op = (inst >> 26) & 0x3f; + rt = inst.i_format.rt; + op = inst.i_format.opcode; vcpu->arch.pending_load_cause = cause; vcpu->arch.io_gpr = rt; @@ -1521,7 +1569,8 @@ enum emulation_result kvm_mips_emulate_load(uint32_t inst, uint32_t cause, break; default: - kvm_err("Load not yet supported"); + kvm_err("Load not yet supported (inst=0x%08x)\n", + inst.word); er = EMULATE_FAIL; break; } @@ -1529,40 +1578,15 @@ enum emulation_result kvm_mips_emulate_load(uint32_t inst, uint32_t cause, return er; } -int kvm_mips_sync_icache(unsigned long va, struct kvm_vcpu *vcpu) -{ - unsigned long offset = (va & ~PAGE_MASK); - struct kvm *kvm = vcpu->kvm; - unsigned long pa; - gfn_t gfn; - kvm_pfn_t pfn; - - gfn = va >> PAGE_SHIFT; - - if (gfn >= kvm->arch.guest_pmap_npages) { - kvm_err("%s: Invalid gfn: %#llx\n", __func__, gfn); - kvm_mips_dump_host_tlbs(); - kvm_arch_vcpu_dump_regs(vcpu); - return -1; - } - pfn = kvm->arch.guest_pmap[gfn]; - pa = (pfn << PAGE_SHIFT) | offset; - - kvm_debug("%s: va: %#lx, unmapped: %#x\n", __func__, va, - CKSEG0ADDR(pa)); - - local_flush_icache_range(CKSEG0ADDR(pa), 32); - return 0; -} - -enum emulation_result kvm_mips_emulate_cache(uint32_t inst, uint32_t *opc, - uint32_t cause, +enum emulation_result kvm_mips_emulate_cache(union mips_instruction inst, + u32 *opc, u32 cause, struct kvm_run *run, struct kvm_vcpu *vcpu) { struct mips_coproc *cop0 = vcpu->arch.cop0; enum emulation_result er = EMULATE_DONE; - int32_t offset, cache, op_inst, op, base; + u32 cache, op_inst, op, base; + s16 offset; struct kvm_vcpu_arch *arch = &vcpu->arch; unsigned long va; unsigned long curr_pc; @@ -1576,9 +1600,12 @@ enum emulation_result kvm_mips_emulate_cache(uint32_t inst, uint32_t *opc, if (er == EMULATE_FAIL) return er; - base = (inst >> 21) & 0x1f; - op_inst = (inst >> 16) & 0x1f; - offset = (int16_t)inst; + base = inst.i_format.rs; + op_inst = inst.i_format.rt; + if (cpu_has_mips_r6) + offset = inst.spec3_format.simmediate; + else + offset = inst.i_format.simmediate; cache = op_inst & CacheOp_Cache; op = op_inst & CacheOp_Op; @@ -1634,7 +1661,6 @@ enum emulation_result kvm_mips_emulate_cache(uint32_t inst, uint32_t *opc, (cop0) & KVM_ENTRYHI_ASID)); if (index < 0) { - vcpu->arch.host_cp0_entryhi = (va & VPN2_MASK); vcpu->arch.host_cp0_badvaddr = va; vcpu->arch.pc = curr_pc; er = kvm_mips_emulate_tlbmiss_ld(cause, NULL, run, @@ -1659,9 +1685,7 @@ enum emulation_result kvm_mips_emulate_cache(uint32_t inst, uint32_t *opc, * We fault an entry from the guest tlb to the * shadow host TLB */ - kvm_mips_handle_mapped_seg_tlb_fault(vcpu, tlb, - NULL, - NULL); + kvm_mips_handle_mapped_seg_tlb_fault(vcpu, tlb); } } } else { @@ -1714,20 +1738,20 @@ dont_update_pc: return er; } -enum emulation_result kvm_mips_emulate_inst(unsigned long cause, uint32_t *opc, +enum emulation_result kvm_mips_emulate_inst(u32 cause, u32 *opc, struct kvm_run *run, struct kvm_vcpu *vcpu) { + union mips_instruction inst; enum emulation_result er = EMULATE_DONE; - uint32_t inst; /* Fetch the instruction. */ if (cause & CAUSEF_BD) opc += 1; - inst = kvm_get_inst(opc, vcpu); + inst.word = kvm_get_inst(opc, vcpu); - switch (((union mips_instruction)inst).r_format.opcode) { + switch (inst.r_format.opcode) { case cop0_op: er = kvm_mips_emulate_CP0(inst, opc, cause, run, vcpu); break; @@ -1744,15 +1768,31 @@ enum emulation_result kvm_mips_emulate_inst(unsigned long cause, uint32_t *opc, er = kvm_mips_emulate_load(inst, cause, run, vcpu); break; +#ifndef CONFIG_CPU_MIPSR6 case cache_op: ++vcpu->stat.cache_exits; - trace_kvm_exit(vcpu, CACHE_EXITS); + trace_kvm_exit(vcpu, KVM_TRACE_EXIT_CACHE); er = kvm_mips_emulate_cache(inst, opc, cause, run, vcpu); break; +#else + case spec3_op: + switch (inst.spec3_format.func) { + case cache6_op: + ++vcpu->stat.cache_exits; + trace_kvm_exit(vcpu, KVM_TRACE_EXIT_CACHE); + er = kvm_mips_emulate_cache(inst, opc, cause, run, + vcpu); + break; + default: + goto unknown; + }; + break; +unknown: +#endif default: kvm_err("Instruction emulation not supported (%p/%#x)\n", opc, - inst); + inst.word); kvm_arch_vcpu_dump_regs(vcpu); er = EMULATE_FAIL; break; @@ -1761,8 +1801,8 @@ enum emulation_result kvm_mips_emulate_inst(unsigned long cause, uint32_t *opc, return er; } -enum emulation_result kvm_mips_emulate_syscall(unsigned long cause, - uint32_t *opc, +enum emulation_result kvm_mips_emulate_syscall(u32 cause, + u32 *opc, struct kvm_run *run, struct kvm_vcpu *vcpu) { @@ -1796,8 +1836,8 @@ enum emulation_result kvm_mips_emulate_syscall(unsigned long cause, return er; } -enum emulation_result kvm_mips_emulate_tlbmiss_ld(unsigned long cause, - uint32_t *opc, +enum emulation_result kvm_mips_emulate_tlbmiss_ld(u32 cause, + u32 *opc, struct kvm_run *run, struct kvm_vcpu *vcpu) { @@ -1842,8 +1882,8 @@ enum emulation_result kvm_mips_emulate_tlbmiss_ld(unsigned long cause, return EMULATE_DONE; } -enum emulation_result kvm_mips_emulate_tlbinv_ld(unsigned long cause, - uint32_t *opc, +enum emulation_result kvm_mips_emulate_tlbinv_ld(u32 cause, + u32 *opc, struct kvm_run *run, struct kvm_vcpu *vcpu) { @@ -1888,8 +1928,8 @@ enum emulation_result kvm_mips_emulate_tlbinv_ld(unsigned long cause, return EMULATE_DONE; } -enum emulation_result kvm_mips_emulate_tlbmiss_st(unsigned long cause, - uint32_t *opc, +enum emulation_result kvm_mips_emulate_tlbmiss_st(u32 cause, + u32 *opc, struct kvm_run *run, struct kvm_vcpu *vcpu) { @@ -1932,8 +1972,8 @@ enum emulation_result kvm_mips_emulate_tlbmiss_st(unsigned long cause, return EMULATE_DONE; } -enum emulation_result kvm_mips_emulate_tlbinv_st(unsigned long cause, - uint32_t *opc, +enum emulation_result kvm_mips_emulate_tlbinv_st(u32 cause, + u32 *opc, struct kvm_run *run, struct kvm_vcpu *vcpu) { @@ -1977,7 +2017,7 @@ enum emulation_result kvm_mips_emulate_tlbinv_st(unsigned long cause, } /* TLBMOD: store into address matching TLB with Dirty bit off */ -enum emulation_result kvm_mips_handle_tlbmod(unsigned long cause, uint32_t *opc, +enum emulation_result kvm_mips_handle_tlbmod(u32 cause, u32 *opc, struct kvm_run *run, struct kvm_vcpu *vcpu) { @@ -2005,8 +2045,8 @@ enum emulation_result kvm_mips_handle_tlbmod(unsigned long cause, uint32_t *opc, return er; } -enum emulation_result kvm_mips_emulate_tlbmod(unsigned long cause, - uint32_t *opc, +enum emulation_result kvm_mips_emulate_tlbmod(u32 cause, + u32 *opc, struct kvm_run *run, struct kvm_vcpu *vcpu) { @@ -2048,8 +2088,8 @@ enum emulation_result kvm_mips_emulate_tlbmod(unsigned long cause, return EMULATE_DONE; } -enum emulation_result kvm_mips_emulate_fpu_exc(unsigned long cause, - uint32_t *opc, +enum emulation_result kvm_mips_emulate_fpu_exc(u32 cause, + u32 *opc, struct kvm_run *run, struct kvm_vcpu *vcpu) { @@ -2077,8 +2117,8 @@ enum emulation_result kvm_mips_emulate_fpu_exc(unsigned long cause, return EMULATE_DONE; } -enum emulation_result kvm_mips_emulate_ri_exc(unsigned long cause, - uint32_t *opc, +enum emulation_result kvm_mips_emulate_ri_exc(u32 cause, + u32 *opc, struct kvm_run *run, struct kvm_vcpu *vcpu) { @@ -2112,8 +2152,8 @@ enum emulation_result kvm_mips_emulate_ri_exc(unsigned long cause, return er; } -enum emulation_result kvm_mips_emulate_bp_exc(unsigned long cause, - uint32_t *opc, +enum emulation_result kvm_mips_emulate_bp_exc(u32 cause, + u32 *opc, struct kvm_run *run, struct kvm_vcpu *vcpu) { @@ -2147,8 +2187,8 @@ enum emulation_result kvm_mips_emulate_bp_exc(unsigned long cause, return er; } -enum emulation_result kvm_mips_emulate_trap_exc(unsigned long cause, - uint32_t *opc, +enum emulation_result kvm_mips_emulate_trap_exc(u32 cause, + u32 *opc, struct kvm_run *run, struct kvm_vcpu *vcpu) { @@ -2182,8 +2222,8 @@ enum emulation_result kvm_mips_emulate_trap_exc(unsigned long cause, return er; } -enum emulation_result kvm_mips_emulate_msafpe_exc(unsigned long cause, - uint32_t *opc, +enum emulation_result kvm_mips_emulate_msafpe_exc(u32 cause, + u32 *opc, struct kvm_run *run, struct kvm_vcpu *vcpu) { @@ -2217,8 +2257,8 @@ enum emulation_result kvm_mips_emulate_msafpe_exc(unsigned long cause, return er; } -enum emulation_result kvm_mips_emulate_fpe_exc(unsigned long cause, - uint32_t *opc, +enum emulation_result kvm_mips_emulate_fpe_exc(u32 cause, + u32 *opc, struct kvm_run *run, struct kvm_vcpu *vcpu) { @@ -2252,8 +2292,8 @@ enum emulation_result kvm_mips_emulate_fpe_exc(unsigned long cause, return er; } -enum emulation_result kvm_mips_emulate_msadis_exc(unsigned long cause, - uint32_t *opc, +enum emulation_result kvm_mips_emulate_msadis_exc(u32 cause, + u32 *opc, struct kvm_run *run, struct kvm_vcpu *vcpu) { @@ -2287,22 +2327,7 @@ enum emulation_result kvm_mips_emulate_msadis_exc(unsigned long cause, return er; } -/* ll/sc, rdhwr, sync emulation */ - -#define OPCODE 0xfc000000 -#define BASE 0x03e00000 -#define RT 0x001f0000 -#define OFFSET 0x0000ffff -#define LL 0xc0000000 -#define SC 0xe0000000 -#define SPEC0 0x00000000 -#define SPEC3 0x7c000000 -#define RD 0x0000f800 -#define FUNC 0x0000003f -#define SYNC 0x0000000f -#define RDHWR 0x0000003b - -enum emulation_result kvm_mips_handle_ri(unsigned long cause, uint32_t *opc, +enum emulation_result kvm_mips_handle_ri(u32 cause, u32 *opc, struct kvm_run *run, struct kvm_vcpu *vcpu) { @@ -2310,7 +2335,7 @@ enum emulation_result kvm_mips_handle_ri(unsigned long cause, uint32_t *opc, struct kvm_vcpu_arch *arch = &vcpu->arch; enum emulation_result er = EMULATE_DONE; unsigned long curr_pc; - uint32_t inst; + union mips_instruction inst; /* * Update PC and hold onto current PC in case there is @@ -2325,17 +2350,22 @@ enum emulation_result kvm_mips_handle_ri(unsigned long cause, uint32_t *opc, if (cause & CAUSEF_BD) opc += 1; - inst = kvm_get_inst(opc, vcpu); + inst.word = kvm_get_inst(opc, vcpu); - if (inst == KVM_INVALID_INST) { + if (inst.word == KVM_INVALID_INST) { kvm_err("%s: Cannot get inst @ %p\n", __func__, opc); return EMULATE_FAIL; } - if ((inst & OPCODE) == SPEC3 && (inst & FUNC) == RDHWR) { + if (inst.r_format.opcode == spec3_op && + inst.r_format.func == rdhwr_op && + inst.r_format.rs == 0 && + (inst.r_format.re >> 3) == 0) { int usermode = !KVM_GUEST_KERNEL_MODE(vcpu); - int rd = (inst & RD) >> 11; - int rt = (inst & RT) >> 16; + int rd = inst.r_format.rd; + int rt = inst.r_format.rt; + int sel = inst.r_format.re & 0x7; + /* If usermode, check RDHWR rd is allowed by guest HWREna */ if (usermode && !(kvm_read_c0_guest_hwrena(cop0) & BIT(rd))) { kvm_debug("RDHWR %#x disallowed by HWREna @ %p\n", @@ -2343,17 +2373,17 @@ enum emulation_result kvm_mips_handle_ri(unsigned long cause, uint32_t *opc, goto emulate_ri; } switch (rd) { - case 0: /* CPU number */ - arch->gprs[rt] = 0; + case MIPS_HWR_CPUNUM: /* CPU number */ + arch->gprs[rt] = vcpu->vcpu_id; break; - case 1: /* SYNCI length */ + case MIPS_HWR_SYNCISTEP: /* SYNCI length */ arch->gprs[rt] = min(current_cpu_data.dcache.linesz, current_cpu_data.icache.linesz); break; - case 2: /* Read count register */ - arch->gprs[rt] = kvm_mips_read_count(vcpu); + case MIPS_HWR_CC: /* Read count register */ + arch->gprs[rt] = (s32)kvm_mips_read_count(vcpu); break; - case 3: /* Count register resolution */ + case MIPS_HWR_CCRES: /* Count register resolution */ switch (current_cpu_data.cputype) { case CPU_20KC: case CPU_25KF: @@ -2363,7 +2393,7 @@ enum emulation_result kvm_mips_handle_ri(unsigned long cause, uint32_t *opc, arch->gprs[rt] = 2; } break; - case 29: + case MIPS_HWR_ULR: /* Read UserLocal register */ arch->gprs[rt] = kvm_read_c0_guest_userlocal(cop0); break; @@ -2371,8 +2401,12 @@ enum emulation_result kvm_mips_handle_ri(unsigned long cause, uint32_t *opc, kvm_debug("RDHWR %#x not supported @ %p\n", rd, opc); goto emulate_ri; } + + trace_kvm_hwr(vcpu, KVM_TRACE_RDHWR, KVM_TRACE_HWR(rd, sel), + vcpu->arch.gprs[rt]); } else { - kvm_debug("Emulate RI not supported @ %p: %#x\n", opc, inst); + kvm_debug("Emulate RI not supported @ %p: %#x\n", + opc, inst.word); goto emulate_ri; } @@ -2405,19 +2439,19 @@ enum emulation_result kvm_mips_complete_mmio_load(struct kvm_vcpu *vcpu, switch (run->mmio.len) { case 4: - *gpr = *(int32_t *) run->mmio.data; + *gpr = *(s32 *) run->mmio.data; break; case 2: if (vcpu->mmio_needed == 2) - *gpr = *(int16_t *) run->mmio.data; + *gpr = *(s16 *) run->mmio.data; else - *gpr = *(uint16_t *)run->mmio.data; + *gpr = *(u16 *)run->mmio.data; break; case 1: if (vcpu->mmio_needed == 2) - *gpr = *(int8_t *) run->mmio.data; + *gpr = *(s8 *) run->mmio.data; else *gpr = *(u8 *) run->mmio.data; break; @@ -2432,12 +2466,12 @@ done: return er; } -static enum emulation_result kvm_mips_emulate_exc(unsigned long cause, - uint32_t *opc, +static enum emulation_result kvm_mips_emulate_exc(u32 cause, + u32 *opc, struct kvm_run *run, struct kvm_vcpu *vcpu) { - uint32_t exccode = (cause >> CAUSEB_EXCCODE) & 0x1f; + u32 exccode = (cause >> CAUSEB_EXCCODE) & 0x1f; struct mips_coproc *cop0 = vcpu->arch.cop0; struct kvm_vcpu_arch *arch = &vcpu->arch; enum emulation_result er = EMULATE_DONE; @@ -2470,13 +2504,13 @@ static enum emulation_result kvm_mips_emulate_exc(unsigned long cause, return er; } -enum emulation_result kvm_mips_check_privilege(unsigned long cause, - uint32_t *opc, +enum emulation_result kvm_mips_check_privilege(u32 cause, + u32 *opc, struct kvm_run *run, struct kvm_vcpu *vcpu) { enum emulation_result er = EMULATE_DONE; - uint32_t exccode = (cause >> CAUSEB_EXCCODE) & 0x1f; + u32 exccode = (cause >> CAUSEB_EXCCODE) & 0x1f; unsigned long badvaddr = vcpu->arch.host_cp0_badvaddr; int usermode = !KVM_GUEST_KERNEL_MODE(vcpu); @@ -2566,18 +2600,18 @@ enum emulation_result kvm_mips_check_privilege(unsigned long cause, * (2) TLB entry is present in the Guest TLB but not in the shadow, in this * case we inject the TLB from the Guest TLB into the shadow host TLB */ -enum emulation_result kvm_mips_handle_tlbmiss(unsigned long cause, - uint32_t *opc, +enum emulation_result kvm_mips_handle_tlbmiss(u32 cause, + u32 *opc, struct kvm_run *run, struct kvm_vcpu *vcpu) { enum emulation_result er = EMULATE_DONE; - uint32_t exccode = (cause >> CAUSEB_EXCCODE) & 0x1f; + u32 exccode = (cause >> CAUSEB_EXCCODE) & 0x1f; unsigned long va = vcpu->arch.host_cp0_badvaddr; int index; - kvm_debug("kvm_mips_handle_tlbmiss: badvaddr: %#lx, entryhi: %#lx\n", - vcpu->arch.host_cp0_badvaddr, vcpu->arch.host_cp0_entryhi); + kvm_debug("kvm_mips_handle_tlbmiss: badvaddr: %#lx\n", + vcpu->arch.host_cp0_badvaddr); /* * KVM would not have got the exception if this entry was valid in the @@ -2620,13 +2654,12 @@ enum emulation_result kvm_mips_handle_tlbmiss(unsigned long cause, } } else { kvm_debug("Injecting hi: %#lx, lo0: %#lx, lo1: %#lx into shadow host TLB\n", - tlb->tlb_hi, tlb->tlb_lo0, tlb->tlb_lo1); + tlb->tlb_hi, tlb->tlb_lo[0], tlb->tlb_lo[1]); /* * OK we have a Guest TLB entry, now inject it into the * shadow host TLB */ - kvm_mips_handle_mapped_seg_tlb_fault(vcpu, tlb, NULL, - NULL); + kvm_mips_handle_mapped_seg_tlb_fault(vcpu, tlb); } } diff --git a/arch/mips/kvm/entry.c b/arch/mips/kvm/entry.c new file mode 100644 index 000000000000..6a02b3a3fa65 --- /dev/null +++ b/arch/mips/kvm/entry.c @@ -0,0 +1,701 @@ +/* + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + * + * Generation of main entry point for the guest, exception handling. + * + * Copyright (C) 2012 MIPS Technologies, Inc. + * Authors: Sanjay Lal <sanjayl@kymasys.com> + * + * Copyright (C) 2016 Imagination Technologies Ltd. + */ + +#include <linux/kvm_host.h> +#include <asm/msa.h> +#include <asm/setup.h> +#include <asm/uasm.h> + +/* Register names */ +#define ZERO 0 +#define AT 1 +#define V0 2 +#define V1 3 +#define A0 4 +#define A1 5 + +#if _MIPS_SIM == _MIPS_SIM_ABI32 +#define T0 8 +#define T1 9 +#define T2 10 +#define T3 11 +#endif /* _MIPS_SIM == _MIPS_SIM_ABI32 */ + +#if _MIPS_SIM == _MIPS_SIM_ABI64 || _MIPS_SIM == _MIPS_SIM_NABI32 +#define T0 12 +#define T1 13 +#define T2 14 +#define T3 15 +#endif /* _MIPS_SIM == _MIPS_SIM_ABI64 || _MIPS_SIM == _MIPS_SIM_NABI32 */ + +#define S0 16 +#define S1 17 +#define T9 25 +#define K0 26 +#define K1 27 +#define GP 28 +#define SP 29 +#define RA 31 + +/* Some CP0 registers */ +#define C0_HWRENA 7, 0 +#define C0_BADVADDR 8, 0 +#define C0_ENTRYHI 10, 0 +#define C0_STATUS 12, 0 +#define C0_CAUSE 13, 0 +#define C0_EPC 14, 0 +#define C0_EBASE 15, 1 +#define C0_CONFIG5 16, 5 +#define C0_DDATA_LO 28, 3 +#define C0_ERROREPC 30, 0 + +#define CALLFRAME_SIZ 32 + +#ifdef CONFIG_64BIT +#define ST0_KX_IF_64 ST0_KX +#else +#define ST0_KX_IF_64 0 +#endif + +static unsigned int scratch_vcpu[2] = { C0_DDATA_LO }; +static unsigned int scratch_tmp[2] = { C0_ERROREPC }; + +enum label_id { + label_fpu_1 = 1, + label_msa_1, + label_return_to_host, + label_kernel_asid, + label_exit_common, +}; + +UASM_L_LA(_fpu_1) +UASM_L_LA(_msa_1) +UASM_L_LA(_return_to_host) +UASM_L_LA(_kernel_asid) +UASM_L_LA(_exit_common) + +static void *kvm_mips_build_enter_guest(void *addr); +static void *kvm_mips_build_ret_from_exit(void *addr); +static void *kvm_mips_build_ret_to_guest(void *addr); +static void *kvm_mips_build_ret_to_host(void *addr); + +/** + * kvm_mips_entry_setup() - Perform global setup for entry code. + * + * Perform global setup for entry code, such as choosing a scratch register. + * + * Returns: 0 on success. + * -errno on failure. + */ +int kvm_mips_entry_setup(void) +{ + /* + * We prefer to use KScratchN registers if they are available over the + * defaults above, which may not work on all cores. + */ + unsigned int kscratch_mask = cpu_data[0].kscratch_mask & 0xfc; + + /* Pick a scratch register for storing VCPU */ + if (kscratch_mask) { + scratch_vcpu[0] = 31; + scratch_vcpu[1] = ffs(kscratch_mask) - 1; + kscratch_mask &= ~BIT(scratch_vcpu[1]); + } + + /* Pick a scratch register to use as a temp for saving state */ + if (kscratch_mask) { + scratch_tmp[0] = 31; + scratch_tmp[1] = ffs(kscratch_mask) - 1; + kscratch_mask &= ~BIT(scratch_tmp[1]); + } + + return 0; +} + +static void kvm_mips_build_save_scratch(u32 **p, unsigned int tmp, + unsigned int frame) +{ + /* Save the VCPU scratch register value in cp0_epc of the stack frame */ + UASM_i_MFC0(p, tmp, scratch_vcpu[0], scratch_vcpu[1]); + UASM_i_SW(p, tmp, offsetof(struct pt_regs, cp0_epc), frame); + + /* Save the temp scratch register value in cp0_cause of stack frame */ + if (scratch_tmp[0] == 31) { + UASM_i_MFC0(p, tmp, scratch_tmp[0], scratch_tmp[1]); + UASM_i_SW(p, tmp, offsetof(struct pt_regs, cp0_cause), frame); + } +} + +static void kvm_mips_build_restore_scratch(u32 **p, unsigned int tmp, + unsigned int frame) +{ + /* + * Restore host scratch register values saved by + * kvm_mips_build_save_scratch(). + */ + UASM_i_LW(p, tmp, offsetof(struct pt_regs, cp0_epc), frame); + UASM_i_MTC0(p, tmp, scratch_vcpu[0], scratch_vcpu[1]); + + if (scratch_tmp[0] == 31) { + UASM_i_LW(p, tmp, offsetof(struct pt_regs, cp0_cause), frame); + UASM_i_MTC0(p, tmp, scratch_tmp[0], scratch_tmp[1]); + } +} + +/** + * build_set_exc_base() - Assemble code to write exception base address. + * @p: Code buffer pointer. + * @reg: Source register (generated code may set WG bit in @reg). + * + * Assemble code to modify the exception base address in the EBase register, + * using the appropriately sized access and setting the WG bit if necessary. + */ +static inline void build_set_exc_base(u32 **p, unsigned int reg) +{ + if (cpu_has_ebase_wg) { + /* Set WG so that all the bits get written */ + uasm_i_ori(p, reg, reg, MIPS_EBASE_WG); + UASM_i_MTC0(p, reg, C0_EBASE); + } else { + uasm_i_mtc0(p, reg, C0_EBASE); + } +} + +/** + * kvm_mips_build_vcpu_run() - Assemble function to start running a guest VCPU. + * @addr: Address to start writing code. + * + * Assemble the start of the vcpu_run function to run a guest VCPU. The function + * conforms to the following prototype: + * + * int vcpu_run(struct kvm_run *run, struct kvm_vcpu *vcpu); + * + * The exit from the guest and return to the caller is handled by the code + * generated by kvm_mips_build_ret_to_host(). + * + * Returns: Next address after end of written function. + */ +void *kvm_mips_build_vcpu_run(void *addr) +{ + u32 *p = addr; + unsigned int i; + + /* + * A0: run + * A1: vcpu + */ + + /* k0/k1 not being used in host kernel context */ + UASM_i_ADDIU(&p, K1, SP, -(int)sizeof(struct pt_regs)); + for (i = 16; i < 32; ++i) { + if (i == 24) + i = 28; + UASM_i_SW(&p, i, offsetof(struct pt_regs, regs[i]), K1); + } + + /* Save host status */ + uasm_i_mfc0(&p, V0, C0_STATUS); + UASM_i_SW(&p, V0, offsetof(struct pt_regs, cp0_status), K1); + + /* Save scratch registers, will be used to store pointer to vcpu etc */ + kvm_mips_build_save_scratch(&p, V1, K1); + + /* VCPU scratch register has pointer to vcpu */ + UASM_i_MTC0(&p, A1, scratch_vcpu[0], scratch_vcpu[1]); + + /* Offset into vcpu->arch */ + UASM_i_ADDIU(&p, K1, A1, offsetof(struct kvm_vcpu, arch)); + + /* + * Save the host stack to VCPU, used for exception processing + * when we exit from the Guest + */ + UASM_i_SW(&p, SP, offsetof(struct kvm_vcpu_arch, host_stack), K1); + + /* Save the kernel gp as well */ + UASM_i_SW(&p, GP, offsetof(struct kvm_vcpu_arch, host_gp), K1); + + /* + * Setup status register for running the guest in UM, interrupts + * are disabled + */ + UASM_i_LA(&p, K0, ST0_EXL | KSU_USER | ST0_BEV | ST0_KX_IF_64); + uasm_i_mtc0(&p, K0, C0_STATUS); + uasm_i_ehb(&p); + + /* load up the new EBASE */ + UASM_i_LW(&p, K0, offsetof(struct kvm_vcpu_arch, guest_ebase), K1); + build_set_exc_base(&p, K0); + + /* + * Now that the new EBASE has been loaded, unset BEV, set + * interrupt mask as it was but make sure that timer interrupts + * are enabled + */ + uasm_i_addiu(&p, K0, ZERO, ST0_EXL | KSU_USER | ST0_IE | ST0_KX_IF_64); + uasm_i_andi(&p, V0, V0, ST0_IM); + uasm_i_or(&p, K0, K0, V0); + uasm_i_mtc0(&p, K0, C0_STATUS); + uasm_i_ehb(&p); + + p = kvm_mips_build_enter_guest(p); + + return p; +} + +/** + * kvm_mips_build_enter_guest() - Assemble code to resume guest execution. + * @addr: Address to start writing code. + * + * Assemble the code to resume guest execution. This code is common between the + * initial entry into the guest from the host, and returning from the exit + * handler back to the guest. + * + * Returns: Next address after end of written function. + */ +static void *kvm_mips_build_enter_guest(void *addr) +{ + u32 *p = addr; + unsigned int i; + struct uasm_label labels[2]; + struct uasm_reloc relocs[2]; + struct uasm_label *l = labels; + struct uasm_reloc *r = relocs; + + memset(labels, 0, sizeof(labels)); + memset(relocs, 0, sizeof(relocs)); + + /* Set Guest EPC */ + UASM_i_LW(&p, T0, offsetof(struct kvm_vcpu_arch, pc), K1); + UASM_i_MTC0(&p, T0, C0_EPC); + + /* Set the ASID for the Guest Kernel */ + UASM_i_LW(&p, T0, offsetof(struct kvm_vcpu_arch, cop0), K1); + UASM_i_LW(&p, T0, offsetof(struct mips_coproc, reg[MIPS_CP0_STATUS][0]), + T0); + uasm_i_andi(&p, T0, T0, KSU_USER | ST0_ERL | ST0_EXL); + uasm_i_xori(&p, T0, T0, KSU_USER); + uasm_il_bnez(&p, &r, T0, label_kernel_asid); + UASM_i_ADDIU(&p, T1, K1, + offsetof(struct kvm_vcpu_arch, guest_kernel_asid)); + /* else user */ + UASM_i_ADDIU(&p, T1, K1, + offsetof(struct kvm_vcpu_arch, guest_user_asid)); + uasm_l_kernel_asid(&l, p); + + /* t1: contains the base of the ASID array, need to get the cpu id */ + /* smp_processor_id */ + uasm_i_lw(&p, T2, offsetof(struct thread_info, cpu), GP); + /* x4 */ + uasm_i_sll(&p, T2, T2, 2); + UASM_i_ADDU(&p, T3, T1, T2); + uasm_i_lw(&p, K0, 0, T3); +#ifdef CONFIG_MIPS_ASID_BITS_VARIABLE + /* x sizeof(struct cpuinfo_mips)/4 */ + uasm_i_addiu(&p, T3, ZERO, sizeof(struct cpuinfo_mips)/4); + uasm_i_mul(&p, T2, T2, T3); + + UASM_i_LA_mostly(&p, AT, (long)&cpu_data[0].asid_mask); + UASM_i_ADDU(&p, AT, AT, T2); + UASM_i_LW(&p, T2, uasm_rel_lo((long)&cpu_data[0].asid_mask), AT); + uasm_i_and(&p, K0, K0, T2); +#else + uasm_i_andi(&p, K0, K0, MIPS_ENTRYHI_ASID); +#endif + uasm_i_mtc0(&p, K0, C0_ENTRYHI); + uasm_i_ehb(&p); + + /* Disable RDHWR access */ + uasm_i_mtc0(&p, ZERO, C0_HWRENA); + + /* load the guest context from VCPU and return */ + for (i = 1; i < 32; ++i) { + /* Guest k0/k1 loaded later */ + if (i == K0 || i == K1) + continue; + UASM_i_LW(&p, i, offsetof(struct kvm_vcpu_arch, gprs[i]), K1); + } + +#ifndef CONFIG_CPU_MIPSR6 + /* Restore hi/lo */ + UASM_i_LW(&p, K0, offsetof(struct kvm_vcpu_arch, hi), K1); + uasm_i_mthi(&p, K0); + + UASM_i_LW(&p, K0, offsetof(struct kvm_vcpu_arch, lo), K1); + uasm_i_mtlo(&p, K0); +#endif + + /* Restore the guest's k0/k1 registers */ + UASM_i_LW(&p, K0, offsetof(struct kvm_vcpu_arch, gprs[K0]), K1); + UASM_i_LW(&p, K1, offsetof(struct kvm_vcpu_arch, gprs[K1]), K1); + + /* Jump to guest */ + uasm_i_eret(&p); + + uasm_resolve_relocs(relocs, labels); + + return p; +} + +/** + * kvm_mips_build_exception() - Assemble first level guest exception handler. + * @addr: Address to start writing code. + * @handler: Address of common handler (within range of @addr). + * + * Assemble exception vector code for guest execution. The generated vector will + * branch to the common exception handler generated by kvm_mips_build_exit(). + * + * Returns: Next address after end of written function. + */ +void *kvm_mips_build_exception(void *addr, void *handler) +{ + u32 *p = addr; + struct uasm_label labels[2]; + struct uasm_reloc relocs[2]; + struct uasm_label *l = labels; + struct uasm_reloc *r = relocs; + + memset(labels, 0, sizeof(labels)); + memset(relocs, 0, sizeof(relocs)); + + /* Save guest k1 into scratch register */ + UASM_i_MTC0(&p, K1, scratch_tmp[0], scratch_tmp[1]); + + /* Get the VCPU pointer from the VCPU scratch register */ + UASM_i_MFC0(&p, K1, scratch_vcpu[0], scratch_vcpu[1]); + UASM_i_ADDIU(&p, K1, K1, offsetof(struct kvm_vcpu, arch)); + + /* Save guest k0 into VCPU structure */ + UASM_i_SW(&p, K0, offsetof(struct kvm_vcpu_arch, gprs[K0]), K1); + + /* Branch to the common handler */ + uasm_il_b(&p, &r, label_exit_common); + uasm_i_nop(&p); + + uasm_l_exit_common(&l, handler); + uasm_resolve_relocs(relocs, labels); + + return p; +} + +/** + * kvm_mips_build_exit() - Assemble common guest exit handler. + * @addr: Address to start writing code. + * + * Assemble the generic guest exit handling code. This is called by the + * exception vectors (generated by kvm_mips_build_exception()), and calls + * kvm_mips_handle_exit(), then either resumes the guest or returns to the host + * depending on the return value. + * + * Returns: Next address after end of written function. + */ +void *kvm_mips_build_exit(void *addr) +{ + u32 *p = addr; + unsigned int i; + struct uasm_label labels[3]; + struct uasm_reloc relocs[3]; + struct uasm_label *l = labels; + struct uasm_reloc *r = relocs; + + memset(labels, 0, sizeof(labels)); + memset(relocs, 0, sizeof(relocs)); + + /* + * Generic Guest exception handler. We end up here when the guest + * does something that causes a trap to kernel mode. + * + * Both k0/k1 registers will have already been saved (k0 into the vcpu + * structure, and k1 into the scratch_tmp register). + * + * The k1 register will already contain the kvm_vcpu_arch pointer. + */ + + /* Start saving Guest context to VCPU */ + for (i = 0; i < 32; ++i) { + /* Guest k0/k1 saved later */ + if (i == K0 || i == K1) + continue; + UASM_i_SW(&p, i, offsetof(struct kvm_vcpu_arch, gprs[i]), K1); + } + +#ifndef CONFIG_CPU_MIPSR6 + /* We need to save hi/lo and restore them on the way out */ + uasm_i_mfhi(&p, T0); + UASM_i_SW(&p, T0, offsetof(struct kvm_vcpu_arch, hi), K1); + + uasm_i_mflo(&p, T0); + UASM_i_SW(&p, T0, offsetof(struct kvm_vcpu_arch, lo), K1); +#endif + + /* Finally save guest k1 to VCPU */ + uasm_i_ehb(&p); + UASM_i_MFC0(&p, T0, scratch_tmp[0], scratch_tmp[1]); + UASM_i_SW(&p, T0, offsetof(struct kvm_vcpu_arch, gprs[K1]), K1); + + /* Now that context has been saved, we can use other registers */ + + /* Restore vcpu */ + UASM_i_MFC0(&p, A1, scratch_vcpu[0], scratch_vcpu[1]); + uasm_i_move(&p, S1, A1); + + /* Restore run (vcpu->run) */ + UASM_i_LW(&p, A0, offsetof(struct kvm_vcpu, run), A1); + /* Save pointer to run in s0, will be saved by the compiler */ + uasm_i_move(&p, S0, A0); + + /* + * Save Host level EPC, BadVaddr and Cause to VCPU, useful to process + * the exception + */ + UASM_i_MFC0(&p, K0, C0_EPC); + UASM_i_SW(&p, K0, offsetof(struct kvm_vcpu_arch, pc), K1); + + UASM_i_MFC0(&p, K0, C0_BADVADDR); + UASM_i_SW(&p, K0, offsetof(struct kvm_vcpu_arch, host_cp0_badvaddr), + K1); + + uasm_i_mfc0(&p, K0, C0_CAUSE); + uasm_i_sw(&p, K0, offsetof(struct kvm_vcpu_arch, host_cp0_cause), K1); + + /* Now restore the host state just enough to run the handlers */ + + /* Switch EBASE to the one used by Linux */ + /* load up the host EBASE */ + uasm_i_mfc0(&p, V0, C0_STATUS); + + uasm_i_lui(&p, AT, ST0_BEV >> 16); + uasm_i_or(&p, K0, V0, AT); + + uasm_i_mtc0(&p, K0, C0_STATUS); + uasm_i_ehb(&p); + + UASM_i_LA_mostly(&p, K0, (long)&ebase); + UASM_i_LW(&p, K0, uasm_rel_lo((long)&ebase), K0); + build_set_exc_base(&p, K0); + + if (raw_cpu_has_fpu) { + /* + * If FPU is enabled, save FCR31 and clear it so that later + * ctc1's don't trigger FPE for pending exceptions. + */ + uasm_i_lui(&p, AT, ST0_CU1 >> 16); + uasm_i_and(&p, V1, V0, AT); + uasm_il_beqz(&p, &r, V1, label_fpu_1); + uasm_i_nop(&p); + uasm_i_cfc1(&p, T0, 31); + uasm_i_sw(&p, T0, offsetof(struct kvm_vcpu_arch, fpu.fcr31), + K1); + uasm_i_ctc1(&p, ZERO, 31); + uasm_l_fpu_1(&l, p); + } + + if (cpu_has_msa) { + /* + * If MSA is enabled, save MSACSR and clear it so that later + * instructions don't trigger MSAFPE for pending exceptions. + */ + uasm_i_mfc0(&p, T0, C0_CONFIG5); + uasm_i_ext(&p, T0, T0, 27, 1); /* MIPS_CONF5_MSAEN */ + uasm_il_beqz(&p, &r, T0, label_msa_1); + uasm_i_nop(&p); + uasm_i_cfcmsa(&p, T0, MSA_CSR); + uasm_i_sw(&p, T0, offsetof(struct kvm_vcpu_arch, fpu.msacsr), + K1); + uasm_i_ctcmsa(&p, MSA_CSR, ZERO); + uasm_l_msa_1(&l, p); + } + + /* Now that the new EBASE has been loaded, unset BEV and KSU_USER */ + uasm_i_addiu(&p, AT, ZERO, ~(ST0_EXL | KSU_USER | ST0_IE)); + uasm_i_and(&p, V0, V0, AT); + uasm_i_lui(&p, AT, ST0_CU0 >> 16); + uasm_i_or(&p, V0, V0, AT); + uasm_i_mtc0(&p, V0, C0_STATUS); + uasm_i_ehb(&p); + + /* Load up host GP */ + UASM_i_LW(&p, GP, offsetof(struct kvm_vcpu_arch, host_gp), K1); + + /* Need a stack before we can jump to "C" */ + UASM_i_LW(&p, SP, offsetof(struct kvm_vcpu_arch, host_stack), K1); + + /* Saved host state */ + UASM_i_ADDIU(&p, SP, SP, -(int)sizeof(struct pt_regs)); + + /* + * XXXKYMA do we need to load the host ASID, maybe not because the + * kernel entries are marked GLOBAL, need to verify + */ + + /* Restore host scratch registers, as we'll have clobbered them */ + kvm_mips_build_restore_scratch(&p, K0, SP); + + /* Restore RDHWR access */ + UASM_i_LA_mostly(&p, K0, (long)&hwrena); + uasm_i_lw(&p, K0, uasm_rel_lo((long)&hwrena), K0); + uasm_i_mtc0(&p, K0, C0_HWRENA); + + /* Jump to handler */ + /* + * XXXKYMA: not sure if this is safe, how large is the stack?? + * Now jump to the kvm_mips_handle_exit() to see if we can deal + * with this in the kernel + */ + UASM_i_LA(&p, T9, (unsigned long)kvm_mips_handle_exit); + uasm_i_jalr(&p, RA, T9); + UASM_i_ADDIU(&p, SP, SP, -CALLFRAME_SIZ); + + uasm_resolve_relocs(relocs, labels); + + p = kvm_mips_build_ret_from_exit(p); + + return p; +} + +/** + * kvm_mips_build_ret_from_exit() - Assemble guest exit return handler. + * @addr: Address to start writing code. + * + * Assemble the code to handle the return from kvm_mips_handle_exit(), either + * resuming the guest or returning to the host depending on the return value. + * + * Returns: Next address after end of written function. + */ +static void *kvm_mips_build_ret_from_exit(void *addr) +{ + u32 *p = addr; + struct uasm_label labels[2]; + struct uasm_reloc relocs[2]; + struct uasm_label *l = labels; + struct uasm_reloc *r = relocs; + + memset(labels, 0, sizeof(labels)); + memset(relocs, 0, sizeof(relocs)); + + /* Return from handler Make sure interrupts are disabled */ + uasm_i_di(&p, ZERO); + uasm_i_ehb(&p); + + /* + * XXXKYMA: k0/k1 could have been blown away if we processed + * an exception while we were handling the exception from the + * guest, reload k1 + */ + + uasm_i_move(&p, K1, S1); + UASM_i_ADDIU(&p, K1, K1, offsetof(struct kvm_vcpu, arch)); + + /* + * Check return value, should tell us if we are returning to the + * host (handle I/O etc)or resuming the guest + */ + uasm_i_andi(&p, T0, V0, RESUME_HOST); + uasm_il_bnez(&p, &r, T0, label_return_to_host); + uasm_i_nop(&p); + + p = kvm_mips_build_ret_to_guest(p); + + uasm_l_return_to_host(&l, p); + p = kvm_mips_build_ret_to_host(p); + + uasm_resolve_relocs(relocs, labels); + + return p; +} + +/** + * kvm_mips_build_ret_to_guest() - Assemble code to return to the guest. + * @addr: Address to start writing code. + * + * Assemble the code to handle return from the guest exit handler + * (kvm_mips_handle_exit()) back to the guest. + * + * Returns: Next address after end of written function. + */ +static void *kvm_mips_build_ret_to_guest(void *addr) +{ + u32 *p = addr; + + /* Put the saved pointer to vcpu (s1) back into the scratch register */ + UASM_i_MTC0(&p, S1, scratch_vcpu[0], scratch_vcpu[1]); + + /* Load up the Guest EBASE to minimize the window where BEV is set */ + UASM_i_LW(&p, T0, offsetof(struct kvm_vcpu_arch, guest_ebase), K1); + + /* Switch EBASE back to the one used by KVM */ + uasm_i_mfc0(&p, V1, C0_STATUS); + uasm_i_lui(&p, AT, ST0_BEV >> 16); + uasm_i_or(&p, K0, V1, AT); + uasm_i_mtc0(&p, K0, C0_STATUS); + uasm_i_ehb(&p); + build_set_exc_base(&p, T0); + + /* Setup status register for running guest in UM */ + uasm_i_ori(&p, V1, V1, ST0_EXL | KSU_USER | ST0_IE); + UASM_i_LA(&p, AT, ~(ST0_CU0 | ST0_MX)); + uasm_i_and(&p, V1, V1, AT); + uasm_i_mtc0(&p, V1, C0_STATUS); + uasm_i_ehb(&p); + + p = kvm_mips_build_enter_guest(p); + + return p; +} + +/** + * kvm_mips_build_ret_to_host() - Assemble code to return to the host. + * @addr: Address to start writing code. + * + * Assemble the code to handle return from the guest exit handler + * (kvm_mips_handle_exit()) back to the host, i.e. to the caller of the vcpu_run + * function generated by kvm_mips_build_vcpu_run(). + * + * Returns: Next address after end of written function. + */ +static void *kvm_mips_build_ret_to_host(void *addr) +{ + u32 *p = addr; + unsigned int i; + + /* EBASE is already pointing to Linux */ + UASM_i_LW(&p, K1, offsetof(struct kvm_vcpu_arch, host_stack), K1); + UASM_i_ADDIU(&p, K1, K1, -(int)sizeof(struct pt_regs)); + + /* + * r2/v0 is the return code, shift it down by 2 (arithmetic) + * to recover the err code + */ + uasm_i_sra(&p, K0, V0, 2); + uasm_i_move(&p, V0, K0); + + /* Load context saved on the host stack */ + for (i = 16; i < 31; ++i) { + if (i == 24) + i = 28; + UASM_i_LW(&p, i, offsetof(struct pt_regs, regs[i]), K1); + } + + /* Restore RDHWR access */ + UASM_i_LA_mostly(&p, K0, (long)&hwrena); + uasm_i_lw(&p, K0, uasm_rel_lo((long)&hwrena), K0); + uasm_i_mtc0(&p, K0, C0_HWRENA); + + /* Restore RA, which is the address we will return to */ + UASM_i_LW(&p, RA, offsetof(struct pt_regs, regs[RA]), K1); + uasm_i_jr(&p, RA); + uasm_i_nop(&p); + + return p; +} + diff --git a/arch/mips/kvm/fpu.S b/arch/mips/kvm/fpu.S index 531fbf5131c0..16f17c6390dd 100644 --- a/arch/mips/kvm/fpu.S +++ b/arch/mips/kvm/fpu.S @@ -14,13 +14,16 @@ #include <asm/mipsregs.h> #include <asm/regdef.h> +/* preprocessor replaces the fp in ".set fp=64" with $30 otherwise */ +#undef fp + .set noreorder .set noat LEAF(__kvm_save_fpu) .set push - .set mips64r2 SET_HARDFLOAT + .set fp=64 mfc0 t0, CP0_STATUS sll t0, t0, 5 # is Status.FR set? bgez t0, 1f # no: skip odd doubles @@ -63,8 +66,8 @@ LEAF(__kvm_save_fpu) LEAF(__kvm_restore_fpu) .set push - .set mips64r2 SET_HARDFLOAT + .set fp=64 mfc0 t0, CP0_STATUS sll t0, t0, 5 # is Status.FR set? bgez t0, 1f # no: skip odd doubles diff --git a/arch/mips/kvm/interrupt.c b/arch/mips/kvm/interrupt.c index 95f790663b0c..ad28dac6b7e9 100644 --- a/arch/mips/kvm/interrupt.c +++ b/arch/mips/kvm/interrupt.c @@ -22,12 +22,12 @@ #include "interrupt.h" -void kvm_mips_queue_irq(struct kvm_vcpu *vcpu, uint32_t priority) +void kvm_mips_queue_irq(struct kvm_vcpu *vcpu, unsigned int priority) { set_bit(priority, &vcpu->arch.pending_exceptions); } -void kvm_mips_dequeue_irq(struct kvm_vcpu *vcpu, uint32_t priority) +void kvm_mips_dequeue_irq(struct kvm_vcpu *vcpu, unsigned int priority) { clear_bit(priority, &vcpu->arch.pending_exceptions); } @@ -114,10 +114,10 @@ void kvm_mips_dequeue_io_int_cb(struct kvm_vcpu *vcpu, /* Deliver the interrupt of the corresponding priority, if possible. */ int kvm_mips_irq_deliver_cb(struct kvm_vcpu *vcpu, unsigned int priority, - uint32_t cause) + u32 cause) { int allowed = 0; - uint32_t exccode; + u32 exccode; struct kvm_vcpu_arch *arch = &vcpu->arch; struct mips_coproc *cop0 = vcpu->arch.cop0; @@ -196,12 +196,12 @@ int kvm_mips_irq_deliver_cb(struct kvm_vcpu *vcpu, unsigned int priority, } int kvm_mips_irq_clear_cb(struct kvm_vcpu *vcpu, unsigned int priority, - uint32_t cause) + u32 cause) { return 1; } -void kvm_mips_deliver_interrupts(struct kvm_vcpu *vcpu, uint32_t cause) +void kvm_mips_deliver_interrupts(struct kvm_vcpu *vcpu, u32 cause) { unsigned long *pending = &vcpu->arch.pending_exceptions; unsigned long *pending_clr = &vcpu->arch.pending_exceptions_clr; diff --git a/arch/mips/kvm/interrupt.h b/arch/mips/kvm/interrupt.h index 2143884709e4..fb118a2c8379 100644 --- a/arch/mips/kvm/interrupt.h +++ b/arch/mips/kvm/interrupt.h @@ -28,17 +28,13 @@ #define MIPS_EXC_MAX 12 /* XXXSL More to follow */ -extern char __kvm_mips_vcpu_run_end[]; -extern char mips32_exception[], mips32_exceptionEnd[]; -extern char mips32_GuestException[], mips32_GuestExceptionEnd[]; - #define C_TI (_ULCAST_(1) << 30) #define KVM_MIPS_IRQ_DELIVER_ALL_AT_ONCE (0) #define KVM_MIPS_IRQ_CLEAR_ALL_AT_ONCE (0) -void kvm_mips_queue_irq(struct kvm_vcpu *vcpu, uint32_t priority); -void kvm_mips_dequeue_irq(struct kvm_vcpu *vcpu, uint32_t priority); +void kvm_mips_queue_irq(struct kvm_vcpu *vcpu, unsigned int priority); +void kvm_mips_dequeue_irq(struct kvm_vcpu *vcpu, unsigned int priority); int kvm_mips_pending_timer(struct kvm_vcpu *vcpu); void kvm_mips_queue_timer_int_cb(struct kvm_vcpu *vcpu); @@ -48,7 +44,7 @@ void kvm_mips_queue_io_int_cb(struct kvm_vcpu *vcpu, void kvm_mips_dequeue_io_int_cb(struct kvm_vcpu *vcpu, struct kvm_mips_interrupt *irq); int kvm_mips_irq_deliver_cb(struct kvm_vcpu *vcpu, unsigned int priority, - uint32_t cause); + u32 cause); int kvm_mips_irq_clear_cb(struct kvm_vcpu *vcpu, unsigned int priority, - uint32_t cause); -void kvm_mips_deliver_interrupts(struct kvm_vcpu *vcpu, uint32_t cause); + u32 cause); +void kvm_mips_deliver_interrupts(struct kvm_vcpu *vcpu, u32 cause); diff --git a/arch/mips/kvm/locore.S b/arch/mips/kvm/locore.S deleted file mode 100644 index 828fcfc1cd7f..000000000000 --- a/arch/mips/kvm/locore.S +++ /dev/null @@ -1,605 +0,0 @@ -/* - * This file is subject to the terms and conditions of the GNU General Public - * License. See the file "COPYING" in the main directory of this archive - * for more details. - * - * Main entry point for the guest, exception handling. - * - * Copyright (C) 2012 MIPS Technologies, Inc. All rights reserved. - * Authors: Sanjay Lal <sanjayl@kymasys.com> - */ - -#include <asm/asm.h> -#include <asm/asmmacro.h> -#include <asm/regdef.h> -#include <asm/mipsregs.h> -#include <asm/stackframe.h> -#include <asm/asm-offsets.h> - -#define _C_LABEL(x) x -#define MIPSX(name) mips32_ ## name -#define CALLFRAME_SIZ 32 - -/* - * VECTOR - * exception vector entrypoint - */ -#define VECTOR(x, regmask) \ - .ent _C_LABEL(x),0; \ - EXPORT(x); - -#define VECTOR_END(x) \ - EXPORT(x); - -/* Overload, Danger Will Robinson!! */ -#define PT_HOST_USERLOCAL PT_EPC - -#define CP0_DDATA_LO $28,3 - -/* Resume Flags */ -#define RESUME_FLAG_HOST (1<<1) /* Resume host? */ - -#define RESUME_GUEST 0 -#define RESUME_HOST RESUME_FLAG_HOST - -/* - * __kvm_mips_vcpu_run: entry point to the guest - * a0: run - * a1: vcpu - */ - .set noreorder - -FEXPORT(__kvm_mips_vcpu_run) - /* k0/k1 not being used in host kernel context */ - INT_ADDIU k1, sp, -PT_SIZE - LONG_S $16, PT_R16(k1) - LONG_S $17, PT_R17(k1) - LONG_S $18, PT_R18(k1) - LONG_S $19, PT_R19(k1) - LONG_S $20, PT_R20(k1) - LONG_S $21, PT_R21(k1) - LONG_S $22, PT_R22(k1) - LONG_S $23, PT_R23(k1) - - LONG_S $28, PT_R28(k1) - LONG_S $29, PT_R29(k1) - LONG_S $30, PT_R30(k1) - LONG_S $31, PT_R31(k1) - - /* Save hi/lo */ - mflo v0 - LONG_S v0, PT_LO(k1) - mfhi v1 - LONG_S v1, PT_HI(k1) - - /* Save host status */ - mfc0 v0, CP0_STATUS - LONG_S v0, PT_STATUS(k1) - - /* Save DDATA_LO, will be used to store pointer to vcpu */ - mfc0 v1, CP0_DDATA_LO - LONG_S v1, PT_HOST_USERLOCAL(k1) - - /* DDATA_LO has pointer to vcpu */ - mtc0 a1, CP0_DDATA_LO - - /* Offset into vcpu->arch */ - INT_ADDIU k1, a1, VCPU_HOST_ARCH - - /* - * Save the host stack to VCPU, used for exception processing - * when we exit from the Guest - */ - LONG_S sp, VCPU_HOST_STACK(k1) - - /* Save the kernel gp as well */ - LONG_S gp, VCPU_HOST_GP(k1) - - /* - * Setup status register for running the guest in UM, interrupts - * are disabled - */ - li k0, (ST0_EXL | KSU_USER | ST0_BEV) - mtc0 k0, CP0_STATUS - ehb - - /* load up the new EBASE */ - LONG_L k0, VCPU_GUEST_EBASE(k1) - mtc0 k0, CP0_EBASE - - /* - * Now that the new EBASE has been loaded, unset BEV, set - * interrupt mask as it was but make sure that timer interrupts - * are enabled - */ - li k0, (ST0_EXL | KSU_USER | ST0_IE) - andi v0, v0, ST0_IM - or k0, k0, v0 - mtc0 k0, CP0_STATUS - ehb - - /* Set Guest EPC */ - LONG_L t0, VCPU_PC(k1) - mtc0 t0, CP0_EPC - -FEXPORT(__kvm_mips_load_asid) - /* Set the ASID for the Guest Kernel */ - PTR_L t0, VCPU_COP0(k1) - LONG_L t0, COP0_STATUS(t0) - andi t0, KSU_USER | ST0_ERL | ST0_EXL - xori t0, KSU_USER - bnez t0, 1f /* If kernel */ - INT_ADDIU t1, k1, VCPU_GUEST_KERNEL_ASID /* (BD) */ - INT_ADDIU t1, k1, VCPU_GUEST_USER_ASID /* else user */ -1: - /* t1: contains the base of the ASID array, need to get the cpu id */ - LONG_L t2, TI_CPU($28) /* smp_processor_id */ - INT_SLL t2, t2, 2 /* x4 */ - REG_ADDU t3, t1, t2 - LONG_L k0, (t3) -#ifdef CONFIG_MIPS_ASID_BITS_VARIABLE - li t3, CPUINFO_SIZE/4 - mul t2, t2, t3 /* x sizeof(struct cpuinfo_mips)/4 */ - LONG_L t2, (cpu_data + CPUINFO_ASID_MASK)(t2) - and k0, k0, t2 -#else - andi k0, k0, MIPS_ENTRYHI_ASID -#endif - mtc0 k0, CP0_ENTRYHI - ehb - - /* Disable RDHWR access */ - mtc0 zero, CP0_HWRENA - - .set noat - /* Now load up the Guest Context from VCPU */ - LONG_L $1, VCPU_R1(k1) - LONG_L $2, VCPU_R2(k1) - LONG_L $3, VCPU_R3(k1) - - LONG_L $4, VCPU_R4(k1) - LONG_L $5, VCPU_R5(k1) - LONG_L $6, VCPU_R6(k1) - LONG_L $7, VCPU_R7(k1) - - LONG_L $8, VCPU_R8(k1) - LONG_L $9, VCPU_R9(k1) - LONG_L $10, VCPU_R10(k1) - LONG_L $11, VCPU_R11(k1) - LONG_L $12, VCPU_R12(k1) - LONG_L $13, VCPU_R13(k1) - LONG_L $14, VCPU_R14(k1) - LONG_L $15, VCPU_R15(k1) - LONG_L $16, VCPU_R16(k1) - LONG_L $17, VCPU_R17(k1) - LONG_L $18, VCPU_R18(k1) - LONG_L $19, VCPU_R19(k1) - LONG_L $20, VCPU_R20(k1) - LONG_L $21, VCPU_R21(k1) - LONG_L $22, VCPU_R22(k1) - LONG_L $23, VCPU_R23(k1) - LONG_L $24, VCPU_R24(k1) - LONG_L $25, VCPU_R25(k1) - - /* k0/k1 loaded up later */ - - LONG_L $28, VCPU_R28(k1) - LONG_L $29, VCPU_R29(k1) - LONG_L $30, VCPU_R30(k1) - LONG_L $31, VCPU_R31(k1) - - /* Restore hi/lo */ - LONG_L k0, VCPU_LO(k1) - mtlo k0 - - LONG_L k0, VCPU_HI(k1) - mthi k0 - -FEXPORT(__kvm_mips_load_k0k1) - /* Restore the guest's k0/k1 registers */ - LONG_L k0, VCPU_R26(k1) - LONG_L k1, VCPU_R27(k1) - - /* Jump to guest */ - eret -EXPORT(__kvm_mips_vcpu_run_end) - -VECTOR(MIPSX(exception), unknown) -/* Find out what mode we came from and jump to the proper handler. */ - mtc0 k0, CP0_ERROREPC #01: Save guest k0 - ehb #02: - - mfc0 k0, CP0_EBASE #02: Get EBASE - INT_SRL k0, k0, 10 #03: Get rid of CPUNum - INT_SLL k0, k0, 10 #04 - LONG_S k1, 0x3000(k0) #05: Save k1 @ offset 0x3000 - INT_ADDIU k0, k0, 0x2000 #06: Exception handler is - # installed @ offset 0x2000 - j k0 #07: jump to the function - nop #08: branch delay slot -VECTOR_END(MIPSX(exceptionEnd)) -.end MIPSX(exception) - -/* - * Generic Guest exception handler. We end up here when the guest - * does something that causes a trap to kernel mode. - */ -NESTED (MIPSX(GuestException), CALLFRAME_SIZ, ra) - /* Get the VCPU pointer from DDTATA_LO */ - mfc0 k1, CP0_DDATA_LO - INT_ADDIU k1, k1, VCPU_HOST_ARCH - - /* Start saving Guest context to VCPU */ - LONG_S $0, VCPU_R0(k1) - LONG_S $1, VCPU_R1(k1) - LONG_S $2, VCPU_R2(k1) - LONG_S $3, VCPU_R3(k1) - LONG_S $4, VCPU_R4(k1) - LONG_S $5, VCPU_R5(k1) - LONG_S $6, VCPU_R6(k1) - LONG_S $7, VCPU_R7(k1) - LONG_S $8, VCPU_R8(k1) - LONG_S $9, VCPU_R9(k1) - LONG_S $10, VCPU_R10(k1) - LONG_S $11, VCPU_R11(k1) - LONG_S $12, VCPU_R12(k1) - LONG_S $13, VCPU_R13(k1) - LONG_S $14, VCPU_R14(k1) - LONG_S $15, VCPU_R15(k1) - LONG_S $16, VCPU_R16(k1) - LONG_S $17, VCPU_R17(k1) - LONG_S $18, VCPU_R18(k1) - LONG_S $19, VCPU_R19(k1) - LONG_S $20, VCPU_R20(k1) - LONG_S $21, VCPU_R21(k1) - LONG_S $22, VCPU_R22(k1) - LONG_S $23, VCPU_R23(k1) - LONG_S $24, VCPU_R24(k1) - LONG_S $25, VCPU_R25(k1) - - /* Guest k0/k1 saved later */ - - LONG_S $28, VCPU_R28(k1) - LONG_S $29, VCPU_R29(k1) - LONG_S $30, VCPU_R30(k1) - LONG_S $31, VCPU_R31(k1) - - .set at - - /* We need to save hi/lo and restore them on the way out */ - mfhi t0 - LONG_S t0, VCPU_HI(k1) - - mflo t0 - LONG_S t0, VCPU_LO(k1) - - /* Finally save guest k0/k1 to VCPU */ - mfc0 t0, CP0_ERROREPC - LONG_S t0, VCPU_R26(k1) - - /* Get GUEST k1 and save it in VCPU */ - PTR_LI t1, ~0x2ff - mfc0 t0, CP0_EBASE - and t0, t0, t1 - LONG_L t0, 0x3000(t0) - LONG_S t0, VCPU_R27(k1) - - /* Now that context has been saved, we can use other registers */ - - /* Restore vcpu */ - mfc0 a1, CP0_DDATA_LO - move s1, a1 - - /* Restore run (vcpu->run) */ - LONG_L a0, VCPU_RUN(a1) - /* Save pointer to run in s0, will be saved by the compiler */ - move s0, a0 - - /* - * Save Host level EPC, BadVaddr and Cause to VCPU, useful to - * process the exception - */ - mfc0 k0,CP0_EPC - LONG_S k0, VCPU_PC(k1) - - mfc0 k0, CP0_BADVADDR - LONG_S k0, VCPU_HOST_CP0_BADVADDR(k1) - - mfc0 k0, CP0_CAUSE - LONG_S k0, VCPU_HOST_CP0_CAUSE(k1) - - mfc0 k0, CP0_ENTRYHI - LONG_S k0, VCPU_HOST_ENTRYHI(k1) - - /* Now restore the host state just enough to run the handlers */ - - /* Switch EBASE to the one used by Linux */ - /* load up the host EBASE */ - mfc0 v0, CP0_STATUS - - or k0, v0, ST0_BEV - - mtc0 k0, CP0_STATUS - ehb - - LONG_L k0, VCPU_HOST_EBASE(k1) - mtc0 k0,CP0_EBASE - - /* - * If FPU is enabled, save FCR31 and clear it so that later ctc1's don't - * trigger FPE for pending exceptions. - */ - and v1, v0, ST0_CU1 - beqz v1, 1f - nop - .set push - SET_HARDFLOAT - cfc1 t0, fcr31 - sw t0, VCPU_FCR31(k1) - ctc1 zero,fcr31 - .set pop -1: - -#ifdef CONFIG_CPU_HAS_MSA - /* - * If MSA is enabled, save MSACSR and clear it so that later - * instructions don't trigger MSAFPE for pending exceptions. - */ - mfc0 t0, CP0_CONFIG3 - ext t0, t0, 28, 1 /* MIPS_CONF3_MSAP */ - beqz t0, 1f - nop - mfc0 t0, CP0_CONFIG5 - ext t0, t0, 27, 1 /* MIPS_CONF5_MSAEN */ - beqz t0, 1f - nop - _cfcmsa t0, MSA_CSR - sw t0, VCPU_MSA_CSR(k1) - _ctcmsa MSA_CSR, zero -1: -#endif - - /* Now that the new EBASE has been loaded, unset BEV and KSU_USER */ - and v0, v0, ~(ST0_EXL | KSU_USER | ST0_IE) - or v0, v0, ST0_CU0 - mtc0 v0, CP0_STATUS - ehb - - /* Load up host GP */ - LONG_L gp, VCPU_HOST_GP(k1) - - /* Need a stack before we can jump to "C" */ - LONG_L sp, VCPU_HOST_STACK(k1) - - /* Saved host state */ - INT_ADDIU sp, sp, -PT_SIZE - - /* - * XXXKYMA do we need to load the host ASID, maybe not because the - * kernel entries are marked GLOBAL, need to verify - */ - - /* Restore host DDATA_LO */ - LONG_L k0, PT_HOST_USERLOCAL(sp) - mtc0 k0, CP0_DDATA_LO - - /* Restore RDHWR access */ - PTR_LI k0, 0x2000000F - mtc0 k0, CP0_HWRENA - - /* Jump to handler */ -FEXPORT(__kvm_mips_jump_to_handler) - /* - * XXXKYMA: not sure if this is safe, how large is the stack?? - * Now jump to the kvm_mips_handle_exit() to see if we can deal - * with this in the kernel - */ - PTR_LA t9, kvm_mips_handle_exit - jalr.hb t9 - INT_ADDIU sp, sp, -CALLFRAME_SIZ /* BD Slot */ - - /* Return from handler Make sure interrupts are disabled */ - di - ehb - - /* - * XXXKYMA: k0/k1 could have been blown away if we processed - * an exception while we were handling the exception from the - * guest, reload k1 - */ - - move k1, s1 - INT_ADDIU k1, k1, VCPU_HOST_ARCH - - /* - * Check return value, should tell us if we are returning to the - * host (handle I/O etc)or resuming the guest - */ - andi t0, v0, RESUME_HOST - bnez t0, __kvm_mips_return_to_host - nop - -__kvm_mips_return_to_guest: - /* Put the saved pointer to vcpu (s1) back into the DDATA_LO Register */ - mtc0 s1, CP0_DDATA_LO - - /* Load up the Guest EBASE to minimize the window where BEV is set */ - LONG_L t0, VCPU_GUEST_EBASE(k1) - - /* Switch EBASE back to the one used by KVM */ - mfc0 v1, CP0_STATUS - or k0, v1, ST0_BEV - mtc0 k0, CP0_STATUS - ehb - mtc0 t0, CP0_EBASE - - /* Setup status register for running guest in UM */ - or v1, v1, (ST0_EXL | KSU_USER | ST0_IE) - and v1, v1, ~(ST0_CU0 | ST0_MX) - mtc0 v1, CP0_STATUS - ehb - - /* Set Guest EPC */ - LONG_L t0, VCPU_PC(k1) - mtc0 t0, CP0_EPC - - /* Set the ASID for the Guest Kernel */ - PTR_L t0, VCPU_COP0(k1) - LONG_L t0, COP0_STATUS(t0) - andi t0, KSU_USER | ST0_ERL | ST0_EXL - xori t0, KSU_USER - bnez t0, 1f /* If kernel */ - INT_ADDIU t1, k1, VCPU_GUEST_KERNEL_ASID /* (BD) */ - INT_ADDIU t1, k1, VCPU_GUEST_USER_ASID /* else user */ -1: - /* t1: contains the base of the ASID array, need to get the cpu id */ - LONG_L t2, TI_CPU($28) /* smp_processor_id */ - INT_SLL t2, t2, 2 /* x4 */ - REG_ADDU t3, t1, t2 - LONG_L k0, (t3) -#ifdef CONFIG_MIPS_ASID_BITS_VARIABLE - li t3, CPUINFO_SIZE/4 - mul t2, t2, t3 /* x sizeof(struct cpuinfo_mips)/4 */ - LONG_L t2, (cpu_data + CPUINFO_ASID_MASK)(t2) - and k0, k0, t2 -#else - andi k0, k0, MIPS_ENTRYHI_ASID -#endif - mtc0 k0, CP0_ENTRYHI - ehb - - /* Disable RDHWR access */ - mtc0 zero, CP0_HWRENA - - .set noat - /* load the guest context from VCPU and return */ - LONG_L $0, VCPU_R0(k1) - LONG_L $1, VCPU_R1(k1) - LONG_L $2, VCPU_R2(k1) - LONG_L $3, VCPU_R3(k1) - LONG_L $4, VCPU_R4(k1) - LONG_L $5, VCPU_R5(k1) - LONG_L $6, VCPU_R6(k1) - LONG_L $7, VCPU_R7(k1) - LONG_L $8, VCPU_R8(k1) - LONG_L $9, VCPU_R9(k1) - LONG_L $10, VCPU_R10(k1) - LONG_L $11, VCPU_R11(k1) - LONG_L $12, VCPU_R12(k1) - LONG_L $13, VCPU_R13(k1) - LONG_L $14, VCPU_R14(k1) - LONG_L $15, VCPU_R15(k1) - LONG_L $16, VCPU_R16(k1) - LONG_L $17, VCPU_R17(k1) - LONG_L $18, VCPU_R18(k1) - LONG_L $19, VCPU_R19(k1) - LONG_L $20, VCPU_R20(k1) - LONG_L $21, VCPU_R21(k1) - LONG_L $22, VCPU_R22(k1) - LONG_L $23, VCPU_R23(k1) - LONG_L $24, VCPU_R24(k1) - LONG_L $25, VCPU_R25(k1) - - /* $/k1 loaded later */ - LONG_L $28, VCPU_R28(k1) - LONG_L $29, VCPU_R29(k1) - LONG_L $30, VCPU_R30(k1) - LONG_L $31, VCPU_R31(k1) - -FEXPORT(__kvm_mips_skip_guest_restore) - LONG_L k0, VCPU_HI(k1) - mthi k0 - - LONG_L k0, VCPU_LO(k1) - mtlo k0 - - LONG_L k0, VCPU_R26(k1) - LONG_L k1, VCPU_R27(k1) - - eret - .set at - -__kvm_mips_return_to_host: - /* EBASE is already pointing to Linux */ - LONG_L k1, VCPU_HOST_STACK(k1) - INT_ADDIU k1,k1, -PT_SIZE - - /* Restore host DDATA_LO */ - LONG_L k0, PT_HOST_USERLOCAL(k1) - mtc0 k0, CP0_DDATA_LO - - /* - * r2/v0 is the return code, shift it down by 2 (arithmetic) - * to recover the err code - */ - INT_SRA k0, v0, 2 - move $2, k0 - - /* Load context saved on the host stack */ - LONG_L $16, PT_R16(k1) - LONG_L $17, PT_R17(k1) - LONG_L $18, PT_R18(k1) - LONG_L $19, PT_R19(k1) - LONG_L $20, PT_R20(k1) - LONG_L $21, PT_R21(k1) - LONG_L $22, PT_R22(k1) - LONG_L $23, PT_R23(k1) - - LONG_L $28, PT_R28(k1) - LONG_L $29, PT_R29(k1) - LONG_L $30, PT_R30(k1) - - LONG_L k0, PT_HI(k1) - mthi k0 - - LONG_L k0, PT_LO(k1) - mtlo k0 - - /* Restore RDHWR access */ - PTR_LI k0, 0x2000000F - mtc0 k0, CP0_HWRENA - - /* Restore RA, which is the address we will return to */ - LONG_L ra, PT_R31(k1) - j ra - nop - -VECTOR_END(MIPSX(GuestExceptionEnd)) -.end MIPSX(GuestException) - -MIPSX(exceptions): - #### - ##### The exception handlers. - ##### - .word _C_LABEL(MIPSX(GuestException)) # 0 - .word _C_LABEL(MIPSX(GuestException)) # 1 - .word _C_LABEL(MIPSX(GuestException)) # 2 - .word _C_LABEL(MIPSX(GuestException)) # 3 - .word _C_LABEL(MIPSX(GuestException)) # 4 - .word _C_LABEL(MIPSX(GuestException)) # 5 - .word _C_LABEL(MIPSX(GuestException)) # 6 - .word _C_LABEL(MIPSX(GuestException)) # 7 - .word _C_LABEL(MIPSX(GuestException)) # 8 - .word _C_LABEL(MIPSX(GuestException)) # 9 - .word _C_LABEL(MIPSX(GuestException)) # 10 - .word _C_LABEL(MIPSX(GuestException)) # 11 - .word _C_LABEL(MIPSX(GuestException)) # 12 - .word _C_LABEL(MIPSX(GuestException)) # 13 - .word _C_LABEL(MIPSX(GuestException)) # 14 - .word _C_LABEL(MIPSX(GuestException)) # 15 - .word _C_LABEL(MIPSX(GuestException)) # 16 - .word _C_LABEL(MIPSX(GuestException)) # 17 - .word _C_LABEL(MIPSX(GuestException)) # 18 - .word _C_LABEL(MIPSX(GuestException)) # 19 - .word _C_LABEL(MIPSX(GuestException)) # 20 - .word _C_LABEL(MIPSX(GuestException)) # 21 - .word _C_LABEL(MIPSX(GuestException)) # 22 - .word _C_LABEL(MIPSX(GuestException)) # 23 - .word _C_LABEL(MIPSX(GuestException)) # 24 - .word _C_LABEL(MIPSX(GuestException)) # 25 - .word _C_LABEL(MIPSX(GuestException)) # 26 - .word _C_LABEL(MIPSX(GuestException)) # 27 - .word _C_LABEL(MIPSX(GuestException)) # 28 - .word _C_LABEL(MIPSX(GuestException)) # 29 - .word _C_LABEL(MIPSX(GuestException)) # 30 - .word _C_LABEL(MIPSX(GuestException)) # 31 diff --git a/arch/mips/kvm/mips.c b/arch/mips/kvm/mips.c index 44da5259f390..a6ea084b4d9d 100644 --- a/arch/mips/kvm/mips.c +++ b/arch/mips/kvm/mips.c @@ -9,6 +9,7 @@ * Authors: Sanjay Lal <sanjayl@kymasys.com> */ +#include <linux/bitops.h> #include <linux/errno.h> #include <linux/err.h> #include <linux/kdebug.h> @@ -147,7 +148,7 @@ void kvm_mips_free_vcpus(struct kvm *kvm) /* Put the pages we reserved for the guest pmap */ for (i = 0; i < kvm->arch.guest_pmap_npages; i++) { if (kvm->arch.guest_pmap[i] != KVM_INVALID_PAGE) - kvm_mips_release_pfn_clean(kvm->arch.guest_pmap[i]); + kvm_release_pfn_clean(kvm->arch.guest_pmap[i]); } kfree(kvm->arch.guest_pmap); @@ -244,10 +245,27 @@ void kvm_arch_commit_memory_region(struct kvm *kvm, } } +static inline void dump_handler(const char *symbol, void *start, void *end) +{ + u32 *p; + + pr_debug("LEAF(%s)\n", symbol); + + pr_debug("\t.set push\n"); + pr_debug("\t.set noreorder\n"); + + for (p = start; p < (u32 *)end; ++p) + pr_debug("\t.word\t0x%08x\t\t# %p\n", *p, p); + + pr_debug("\t.set\tpop\n"); + + pr_debug("\tEND(%s)\n", symbol); +} + struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id) { - int err, size, offset; - void *gebase; + int err, size; + void *gebase, *p, *handler; int i; struct kvm_vcpu *vcpu = kzalloc(sizeof(struct kvm_vcpu), GFP_KERNEL); @@ -273,9 +291,6 @@ struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id) else size = 0x4000; - /* Save Linux EBASE */ - vcpu->arch.host_ebase = (void *)read_c0_ebase(); - gebase = kzalloc(ALIGN(size, PAGE_SIZE), GFP_KERNEL); if (!gebase) { @@ -285,44 +300,53 @@ struct kvm_vcpu *kvm_arch_vcpu_create(struct kvm *kvm, unsigned int id) kvm_debug("Allocated %d bytes for KVM Exception Handlers @ %p\n", ALIGN(size, PAGE_SIZE), gebase); + /* + * Check new ebase actually fits in CP0_EBase. The lack of a write gate + * limits us to the low 512MB of physical address space. If the memory + * we allocate is out of range, just give up now. + */ + if (!cpu_has_ebase_wg && virt_to_phys(gebase) >= 0x20000000) { + kvm_err("CP0_EBase.WG required for guest exception base %pK\n", + gebase); + err = -ENOMEM; + goto out_free_gebase; + } + /* Save new ebase */ vcpu->arch.guest_ebase = gebase; - /* Copy L1 Guest Exception handler to correct offset */ + /* Build guest exception vectors dynamically in unmapped memory */ + handler = gebase + 0x2000; /* TLB Refill, EXL = 0 */ - memcpy(gebase, mips32_exception, - mips32_exceptionEnd - mips32_exception); + kvm_mips_build_exception(gebase, handler); /* General Exception Entry point */ - memcpy(gebase + 0x180, mips32_exception, - mips32_exceptionEnd - mips32_exception); + kvm_mips_build_exception(gebase + 0x180, handler); /* For vectored interrupts poke the exception code @ all offsets 0-7 */ for (i = 0; i < 8; i++) { kvm_debug("L1 Vectored handler @ %p\n", gebase + 0x200 + (i * VECTORSPACING)); - memcpy(gebase + 0x200 + (i * VECTORSPACING), mips32_exception, - mips32_exceptionEnd - mips32_exception); + kvm_mips_build_exception(gebase + 0x200 + i * VECTORSPACING, + handler); } - /* General handler, relocate to unmapped space for sanity's sake */ - offset = 0x2000; - kvm_debug("Installing KVM Exception handlers @ %p, %#x bytes\n", - gebase + offset, - mips32_GuestExceptionEnd - mips32_GuestException); + /* General exit handler */ + p = handler; + p = kvm_mips_build_exit(p); - memcpy(gebase + offset, mips32_GuestException, - mips32_GuestExceptionEnd - mips32_GuestException); + /* Guest entry routine */ + vcpu->arch.vcpu_run = p; + p = kvm_mips_build_vcpu_run(p); -#ifdef MODULE - offset += mips32_GuestExceptionEnd - mips32_GuestException; - memcpy(gebase + offset, (char *)__kvm_mips_vcpu_run, - __kvm_mips_vcpu_run_end - (char *)__kvm_mips_vcpu_run); - vcpu->arch.vcpu_run = gebase + offset; -#else - vcpu->arch.vcpu_run = __kvm_mips_vcpu_run; -#endif + /* Dump the generated code */ + pr_debug("#include <asm/asm.h>\n"); + pr_debug("#include <asm/regdef.h>\n"); + pr_debug("\n"); + dump_handler("kvm_vcpu_run", vcpu->arch.vcpu_run, p); + dump_handler("kvm_gen_exc", gebase + 0x180, gebase + 0x200); + dump_handler("kvm_exit", gebase + 0x2000, vcpu->arch.vcpu_run); /* Invalidate the icache for these ranges */ local_flush_icache_range((unsigned long)gebase, @@ -408,17 +432,19 @@ int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *run) kvm_mips_deliver_interrupts(vcpu, kvm_read_c0_guest_cause(vcpu->arch.cop0)); - __kvm_guest_enter(); + guest_enter_irqoff(); /* Disable hardware page table walking while in guest */ htw_stop(); + trace_kvm_enter(vcpu); r = vcpu->arch.vcpu_run(run, vcpu); + trace_kvm_out(vcpu); /* Re-enable HTW before enabling interrupts */ htw_start(); - __kvm_guest_exit(); + guest_exit_irqoff(); local_irq_enable(); if (vcpu->sigset_active) @@ -507,8 +533,10 @@ static u64 kvm_mips_get_one_regs[] = { KVM_REG_MIPS_R30, KVM_REG_MIPS_R31, +#ifndef CONFIG_CPU_MIPSR6 KVM_REG_MIPS_HI, KVM_REG_MIPS_LO, +#endif KVM_REG_MIPS_PC, KVM_REG_MIPS_CP0_INDEX, @@ -539,6 +567,104 @@ static u64 kvm_mips_get_one_regs[] = { KVM_REG_MIPS_COUNT_HZ, }; +static u64 kvm_mips_get_one_regs_fpu[] = { + KVM_REG_MIPS_FCR_IR, + KVM_REG_MIPS_FCR_CSR, +}; + +static u64 kvm_mips_get_one_regs_msa[] = { + KVM_REG_MIPS_MSA_IR, + KVM_REG_MIPS_MSA_CSR, +}; + +static u64 kvm_mips_get_one_regs_kscratch[] = { + KVM_REG_MIPS_CP0_KSCRATCH1, + KVM_REG_MIPS_CP0_KSCRATCH2, + KVM_REG_MIPS_CP0_KSCRATCH3, + KVM_REG_MIPS_CP0_KSCRATCH4, + KVM_REG_MIPS_CP0_KSCRATCH5, + KVM_REG_MIPS_CP0_KSCRATCH6, +}; + +static unsigned long kvm_mips_num_regs(struct kvm_vcpu *vcpu) +{ + unsigned long ret; + + ret = ARRAY_SIZE(kvm_mips_get_one_regs); + if (kvm_mips_guest_can_have_fpu(&vcpu->arch)) { + ret += ARRAY_SIZE(kvm_mips_get_one_regs_fpu) + 48; + /* odd doubles */ + if (boot_cpu_data.fpu_id & MIPS_FPIR_F64) + ret += 16; + } + if (kvm_mips_guest_can_have_msa(&vcpu->arch)) + ret += ARRAY_SIZE(kvm_mips_get_one_regs_msa) + 32; + ret += __arch_hweight8(vcpu->arch.kscratch_enabled); + ret += kvm_mips_callbacks->num_regs(vcpu); + + return ret; +} + +static int kvm_mips_copy_reg_indices(struct kvm_vcpu *vcpu, u64 __user *indices) +{ + u64 index; + unsigned int i; + + if (copy_to_user(indices, kvm_mips_get_one_regs, + sizeof(kvm_mips_get_one_regs))) + return -EFAULT; + indices += ARRAY_SIZE(kvm_mips_get_one_regs); + + if (kvm_mips_guest_can_have_fpu(&vcpu->arch)) { + if (copy_to_user(indices, kvm_mips_get_one_regs_fpu, + sizeof(kvm_mips_get_one_regs_fpu))) + return -EFAULT; + indices += ARRAY_SIZE(kvm_mips_get_one_regs_fpu); + + for (i = 0; i < 32; ++i) { + index = KVM_REG_MIPS_FPR_32(i); + if (copy_to_user(indices, &index, sizeof(index))) + return -EFAULT; + ++indices; + + /* skip odd doubles if no F64 */ + if (i & 1 && !(boot_cpu_data.fpu_id & MIPS_FPIR_F64)) + continue; + + index = KVM_REG_MIPS_FPR_64(i); + if (copy_to_user(indices, &index, sizeof(index))) + return -EFAULT; + ++indices; + } + } + + if (kvm_mips_guest_can_have_msa(&vcpu->arch)) { + if (copy_to_user(indices, kvm_mips_get_one_regs_msa, + sizeof(kvm_mips_get_one_regs_msa))) + return -EFAULT; + indices += ARRAY_SIZE(kvm_mips_get_one_regs_msa); + + for (i = 0; i < 32; ++i) { + index = KVM_REG_MIPS_VEC_128(i); + if (copy_to_user(indices, &index, sizeof(index))) + return -EFAULT; + ++indices; + } + } + + for (i = 0; i < 6; ++i) { + if (!(vcpu->arch.kscratch_enabled & BIT(i + 2))) + continue; + + if (copy_to_user(indices, &kvm_mips_get_one_regs_kscratch[i], + sizeof(kvm_mips_get_one_regs_kscratch[i]))) + return -EFAULT; + ++indices; + } + + return kvm_mips_callbacks->copy_reg_indices(vcpu, indices); +} + static int kvm_mips_get_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg) { @@ -554,12 +680,14 @@ static int kvm_mips_get_reg(struct kvm_vcpu *vcpu, case KVM_REG_MIPS_R0 ... KVM_REG_MIPS_R31: v = (long)vcpu->arch.gprs[reg->id - KVM_REG_MIPS_R0]; break; +#ifndef CONFIG_CPU_MIPSR6 case KVM_REG_MIPS_HI: v = (long)vcpu->arch.hi; break; case KVM_REG_MIPS_LO: v = (long)vcpu->arch.lo; break; +#endif case KVM_REG_MIPS_PC: v = (long)vcpu->arch.pc; break; @@ -688,17 +816,37 @@ static int kvm_mips_get_reg(struct kvm_vcpu *vcpu, case KVM_REG_MIPS_CP0_ERROREPC: v = (long)kvm_read_c0_guest_errorepc(cop0); break; + case KVM_REG_MIPS_CP0_KSCRATCH1 ... KVM_REG_MIPS_CP0_KSCRATCH6: + idx = reg->id - KVM_REG_MIPS_CP0_KSCRATCH1 + 2; + if (!(vcpu->arch.kscratch_enabled & BIT(idx))) + return -EINVAL; + switch (idx) { + case 2: + v = (long)kvm_read_c0_guest_kscratch1(cop0); + break; + case 3: + v = (long)kvm_read_c0_guest_kscratch2(cop0); + break; + case 4: + v = (long)kvm_read_c0_guest_kscratch3(cop0); + break; + case 5: + v = (long)kvm_read_c0_guest_kscratch4(cop0); + break; + case 6: + v = (long)kvm_read_c0_guest_kscratch5(cop0); + break; + case 7: + v = (long)kvm_read_c0_guest_kscratch6(cop0); + break; + } + break; /* registers to be handled specially */ - case KVM_REG_MIPS_CP0_COUNT: - case KVM_REG_MIPS_COUNT_CTL: - case KVM_REG_MIPS_COUNT_RESUME: - case KVM_REG_MIPS_COUNT_HZ: + default: ret = kvm_mips_callbacks->get_one_reg(vcpu, reg, &v); if (ret) return ret; break; - default: - return -EINVAL; } if ((reg->id & KVM_REG_SIZE_MASK) == KVM_REG_SIZE_U64) { u64 __user *uaddr64 = (u64 __user *)(long)reg->addr; @@ -755,12 +903,14 @@ static int kvm_mips_set_reg(struct kvm_vcpu *vcpu, case KVM_REG_MIPS_R1 ... KVM_REG_MIPS_R31: vcpu->arch.gprs[reg->id - KVM_REG_MIPS_R0] = v; break; +#ifndef CONFIG_CPU_MIPSR6 case KVM_REG_MIPS_HI: vcpu->arch.hi = v; break; case KVM_REG_MIPS_LO: vcpu->arch.lo = v; break; +#endif case KVM_REG_MIPS_PC: vcpu->arch.pc = v; break; @@ -859,22 +1009,34 @@ static int kvm_mips_set_reg(struct kvm_vcpu *vcpu, case KVM_REG_MIPS_CP0_ERROREPC: kvm_write_c0_guest_errorepc(cop0, v); break; + case KVM_REG_MIPS_CP0_KSCRATCH1 ... KVM_REG_MIPS_CP0_KSCRATCH6: + idx = reg->id - KVM_REG_MIPS_CP0_KSCRATCH1 + 2; + if (!(vcpu->arch.kscratch_enabled & BIT(idx))) + return -EINVAL; + switch (idx) { + case 2: + kvm_write_c0_guest_kscratch1(cop0, v); + break; + case 3: + kvm_write_c0_guest_kscratch2(cop0, v); + break; + case 4: + kvm_write_c0_guest_kscratch3(cop0, v); + break; + case 5: + kvm_write_c0_guest_kscratch4(cop0, v); + break; + case 6: + kvm_write_c0_guest_kscratch5(cop0, v); + break; + case 7: + kvm_write_c0_guest_kscratch6(cop0, v); + break; + } + break; /* registers to be handled specially */ - case KVM_REG_MIPS_CP0_COUNT: - case KVM_REG_MIPS_CP0_COMPARE: - case KVM_REG_MIPS_CP0_CAUSE: - case KVM_REG_MIPS_CP0_CONFIG: - case KVM_REG_MIPS_CP0_CONFIG1: - case KVM_REG_MIPS_CP0_CONFIG2: - case KVM_REG_MIPS_CP0_CONFIG3: - case KVM_REG_MIPS_CP0_CONFIG4: - case KVM_REG_MIPS_CP0_CONFIG5: - case KVM_REG_MIPS_COUNT_CTL: - case KVM_REG_MIPS_COUNT_RESUME: - case KVM_REG_MIPS_COUNT_HZ: - return kvm_mips_callbacks->set_one_reg(vcpu, reg, v); default: - return -EINVAL; + return kvm_mips_callbacks->set_one_reg(vcpu, reg, v); } return 0; } @@ -927,23 +1089,18 @@ long kvm_arch_vcpu_ioctl(struct file *filp, unsigned int ioctl, } case KVM_GET_REG_LIST: { struct kvm_reg_list __user *user_list = argp; - u64 __user *reg_dest; struct kvm_reg_list reg_list; unsigned n; if (copy_from_user(®_list, user_list, sizeof(reg_list))) return -EFAULT; n = reg_list.n; - reg_list.n = ARRAY_SIZE(kvm_mips_get_one_regs); + reg_list.n = kvm_mips_num_regs(vcpu); if (copy_to_user(user_list, ®_list, sizeof(reg_list))) return -EFAULT; if (n < reg_list.n) return -E2BIG; - reg_dest = user_list->reg; - if (copy_to_user(reg_dest, kvm_mips_get_one_regs, - sizeof(kvm_mips_get_one_regs))) - return -EFAULT; - return 0; + return kvm_mips_copy_reg_indices(vcpu, user_list->reg); } case KVM_NMI: /* Treat the NMI as a CPU reset */ @@ -1222,7 +1379,7 @@ int kvm_arch_vcpu_setup(struct kvm_vcpu *vcpu) static void kvm_mips_set_c0_status(void) { - uint32_t status = read_c0_status(); + u32 status = read_c0_status(); if (cpu_has_dsp) status |= (ST0_MX); @@ -1236,9 +1393,9 @@ static void kvm_mips_set_c0_status(void) */ int kvm_mips_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu) { - uint32_t cause = vcpu->arch.host_cp0_cause; - uint32_t exccode = (cause >> CAUSEB_EXCCODE) & 0x1f; - uint32_t __user *opc = (uint32_t __user *) vcpu->arch.pc; + u32 cause = vcpu->arch.host_cp0_cause; + u32 exccode = (cause >> CAUSEB_EXCCODE) & 0x1f; + u32 __user *opc = (u32 __user *) vcpu->arch.pc; unsigned long badvaddr = vcpu->arch.host_cp0_badvaddr; enum emulation_result er = EMULATE_DONE; int ret = RESUME_GUEST; @@ -1260,6 +1417,7 @@ int kvm_mips_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu) kvm_debug("kvm_mips_handle_exit: cause: %#x, PC: %p, kvm_run: %p, kvm_vcpu: %p\n", cause, opc, run, vcpu); + trace_kvm_exit(vcpu, exccode); /* * Do a privilege check, if in UM most of these exit conditions end up @@ -1279,7 +1437,6 @@ int kvm_mips_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu) kvm_debug("[%d]EXCCODE_INT @ %p\n", vcpu->vcpu_id, opc); ++vcpu->stat.int_exits; - trace_kvm_exit(vcpu, INT_EXITS); if (need_resched()) cond_resched(); @@ -1291,7 +1448,6 @@ int kvm_mips_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu) kvm_debug("EXCCODE_CPU: @ PC: %p\n", opc); ++vcpu->stat.cop_unusable_exits; - trace_kvm_exit(vcpu, COP_UNUSABLE_EXITS); ret = kvm_mips_callbacks->handle_cop_unusable(vcpu); /* XXXKYMA: Might need to return to user space */ if (run->exit_reason == KVM_EXIT_IRQ_WINDOW_OPEN) @@ -1300,7 +1456,6 @@ int kvm_mips_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu) case EXCCODE_MOD: ++vcpu->stat.tlbmod_exits; - trace_kvm_exit(vcpu, TLBMOD_EXITS); ret = kvm_mips_callbacks->handle_tlb_mod(vcpu); break; @@ -1310,7 +1465,6 @@ int kvm_mips_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu) badvaddr); ++vcpu->stat.tlbmiss_st_exits; - trace_kvm_exit(vcpu, TLBMISS_ST_EXITS); ret = kvm_mips_callbacks->handle_tlb_st_miss(vcpu); break; @@ -1319,61 +1473,51 @@ int kvm_mips_handle_exit(struct kvm_run *run, struct kvm_vcpu *vcpu) cause, opc, badvaddr); ++vcpu->stat.tlbmiss_ld_exits; - trace_kvm_exit(vcpu, TLBMISS_LD_EXITS); ret = kvm_mips_callbacks->handle_tlb_ld_miss(vcpu); break; case EXCCODE_ADES: ++vcpu->stat.addrerr_st_exits; - trace_kvm_exit(vcpu, ADDRERR_ST_EXITS); ret = kvm_mips_callbacks->handle_addr_err_st(vcpu); break; case EXCCODE_ADEL: ++vcpu->stat.addrerr_ld_exits; - trace_kvm_exit(vcpu, ADDRERR_LD_EXITS); ret = kvm_mips_callbacks->handle_addr_err_ld(vcpu); break; case EXCCODE_SYS: ++vcpu->stat.syscall_exits; - trace_kvm_exit(vcpu, SYSCALL_EXITS); ret = kvm_mips_callbacks->handle_syscall(vcpu); break; case EXCCODE_RI: ++vcpu->stat.resvd_inst_exits; - trace_kvm_exit(vcpu, RESVD_INST_EXITS); ret = kvm_mips_callbacks->handle_res_inst(vcpu); break; case EXCCODE_BP: ++vcpu->stat.break_inst_exits; - trace_kvm_exit(vcpu, BREAK_INST_EXITS); ret = kvm_mips_callbacks->handle_break(vcpu); break; case EXCCODE_TR: ++vcpu->stat.trap_inst_exits; - trace_kvm_exit(vcpu, TRAP_INST_EXITS); ret = kvm_mips_callbacks->handle_trap(vcpu); break; case EXCCODE_MSAFPE: ++vcpu->stat.msa_fpe_exits; - trace_kvm_exit(vcpu, MSA_FPE_EXITS); ret = kvm_mips_callbacks->handle_msa_fpe(vcpu); break; case EXCCODE_FPE: ++vcpu->stat.fpe_exits; - trace_kvm_exit(vcpu, FPE_EXITS); ret = kvm_mips_callbacks->handle_fpe(vcpu); break; case EXCCODE_MSADIS: ++vcpu->stat.msa_disabled_exits; - trace_kvm_exit(vcpu, MSA_DISABLED_EXITS); ret = kvm_mips_callbacks->handle_msa_disabled(vcpu); break; @@ -1400,11 +1544,13 @@ skip_emul: run->exit_reason = KVM_EXIT_INTR; ret = (-EINTR << 2) | RESUME_HOST; ++vcpu->stat.signal_exits; - trace_kvm_exit(vcpu, SIGNAL_EXITS); + trace_kvm_exit(vcpu, KVM_TRACE_EXIT_SIGNAL); } } if (ret == RESUME_GUEST) { + trace_kvm_reenter(vcpu); + /* * If FPU / MSA are enabled (i.e. the guest's FPU / MSA context * is live), restore FCR31 / MSACSR. @@ -1450,7 +1596,7 @@ void kvm_own_fpu(struct kvm_vcpu *vcpu) * not to clobber the status register directly via the commpage. */ if (cpu_has_msa && sr & ST0_CU1 && !(sr & ST0_FR) && - vcpu->arch.fpu_inuse & KVM_MIPS_FPU_MSA) + vcpu->arch.aux_inuse & KVM_MIPS_AUX_MSA) kvm_lose_fpu(vcpu); /* @@ -1465,9 +1611,12 @@ void kvm_own_fpu(struct kvm_vcpu *vcpu) enable_fpu_hazard(); /* If guest FPU state not active, restore it now */ - if (!(vcpu->arch.fpu_inuse & KVM_MIPS_FPU_FPU)) { + if (!(vcpu->arch.aux_inuse & KVM_MIPS_AUX_FPU)) { __kvm_restore_fpu(&vcpu->arch); - vcpu->arch.fpu_inuse |= KVM_MIPS_FPU_FPU; + vcpu->arch.aux_inuse |= KVM_MIPS_AUX_FPU; + trace_kvm_aux(vcpu, KVM_TRACE_AUX_RESTORE, KVM_TRACE_AUX_FPU); + } else { + trace_kvm_aux(vcpu, KVM_TRACE_AUX_ENABLE, KVM_TRACE_AUX_FPU); } preempt_enable(); @@ -1494,8 +1643,8 @@ void kvm_own_msa(struct kvm_vcpu *vcpu) * interacts with MSA state, so play it safe and save it first. */ if (!(sr & ST0_FR) && - (vcpu->arch.fpu_inuse & (KVM_MIPS_FPU_FPU | - KVM_MIPS_FPU_MSA)) == KVM_MIPS_FPU_FPU) + (vcpu->arch.aux_inuse & (KVM_MIPS_AUX_FPU | + KVM_MIPS_AUX_MSA)) == KVM_MIPS_AUX_FPU) kvm_lose_fpu(vcpu); change_c0_status(ST0_CU1 | ST0_FR, sr); @@ -1509,22 +1658,26 @@ void kvm_own_msa(struct kvm_vcpu *vcpu) set_c0_config5(MIPS_CONF5_MSAEN); enable_fpu_hazard(); - switch (vcpu->arch.fpu_inuse & (KVM_MIPS_FPU_FPU | KVM_MIPS_FPU_MSA)) { - case KVM_MIPS_FPU_FPU: + switch (vcpu->arch.aux_inuse & (KVM_MIPS_AUX_FPU | KVM_MIPS_AUX_MSA)) { + case KVM_MIPS_AUX_FPU: /* * Guest FPU state already loaded, only restore upper MSA state */ __kvm_restore_msa_upper(&vcpu->arch); - vcpu->arch.fpu_inuse |= KVM_MIPS_FPU_MSA; + vcpu->arch.aux_inuse |= KVM_MIPS_AUX_MSA; + trace_kvm_aux(vcpu, KVM_TRACE_AUX_RESTORE, KVM_TRACE_AUX_MSA); break; case 0: /* Neither FPU or MSA already active, restore full MSA state */ __kvm_restore_msa(&vcpu->arch); - vcpu->arch.fpu_inuse |= KVM_MIPS_FPU_MSA; + vcpu->arch.aux_inuse |= KVM_MIPS_AUX_MSA; if (kvm_mips_guest_has_fpu(&vcpu->arch)) - vcpu->arch.fpu_inuse |= KVM_MIPS_FPU_FPU; + vcpu->arch.aux_inuse |= KVM_MIPS_AUX_FPU; + trace_kvm_aux(vcpu, KVM_TRACE_AUX_RESTORE, + KVM_TRACE_AUX_FPU_MSA); break; default: + trace_kvm_aux(vcpu, KVM_TRACE_AUX_ENABLE, KVM_TRACE_AUX_MSA); break; } @@ -1536,13 +1689,15 @@ void kvm_own_msa(struct kvm_vcpu *vcpu) void kvm_drop_fpu(struct kvm_vcpu *vcpu) { preempt_disable(); - if (cpu_has_msa && vcpu->arch.fpu_inuse & KVM_MIPS_FPU_MSA) { + if (cpu_has_msa && vcpu->arch.aux_inuse & KVM_MIPS_AUX_MSA) { disable_msa(); - vcpu->arch.fpu_inuse &= ~KVM_MIPS_FPU_MSA; + trace_kvm_aux(vcpu, KVM_TRACE_AUX_DISCARD, KVM_TRACE_AUX_MSA); + vcpu->arch.aux_inuse &= ~KVM_MIPS_AUX_MSA; } - if (vcpu->arch.fpu_inuse & KVM_MIPS_FPU_FPU) { + if (vcpu->arch.aux_inuse & KVM_MIPS_AUX_FPU) { clear_c0_status(ST0_CU1 | ST0_FR); - vcpu->arch.fpu_inuse &= ~KVM_MIPS_FPU_FPU; + trace_kvm_aux(vcpu, KVM_TRACE_AUX_DISCARD, KVM_TRACE_AUX_FPU); + vcpu->arch.aux_inuse &= ~KVM_MIPS_AUX_FPU; } preempt_enable(); } @@ -1558,25 +1713,27 @@ void kvm_lose_fpu(struct kvm_vcpu *vcpu) */ preempt_disable(); - if (cpu_has_msa && vcpu->arch.fpu_inuse & KVM_MIPS_FPU_MSA) { + if (cpu_has_msa && vcpu->arch.aux_inuse & KVM_MIPS_AUX_MSA) { set_c0_config5(MIPS_CONF5_MSAEN); enable_fpu_hazard(); __kvm_save_msa(&vcpu->arch); + trace_kvm_aux(vcpu, KVM_TRACE_AUX_SAVE, KVM_TRACE_AUX_FPU_MSA); /* Disable MSA & FPU */ disable_msa(); - if (vcpu->arch.fpu_inuse & KVM_MIPS_FPU_FPU) { + if (vcpu->arch.aux_inuse & KVM_MIPS_AUX_FPU) { clear_c0_status(ST0_CU1 | ST0_FR); disable_fpu_hazard(); } - vcpu->arch.fpu_inuse &= ~(KVM_MIPS_FPU_FPU | KVM_MIPS_FPU_MSA); - } else if (vcpu->arch.fpu_inuse & KVM_MIPS_FPU_FPU) { + vcpu->arch.aux_inuse &= ~(KVM_MIPS_AUX_FPU | KVM_MIPS_AUX_MSA); + } else if (vcpu->arch.aux_inuse & KVM_MIPS_AUX_FPU) { set_c0_status(ST0_CU1); enable_fpu_hazard(); __kvm_save_fpu(&vcpu->arch); - vcpu->arch.fpu_inuse &= ~KVM_MIPS_FPU_FPU; + vcpu->arch.aux_inuse &= ~KVM_MIPS_AUX_FPU; + trace_kvm_aux(vcpu, KVM_TRACE_AUX_SAVE, KVM_TRACE_AUX_FPU); /* Disable FPU */ clear_c0_status(ST0_CU1 | ST0_FR); @@ -1638,6 +1795,10 @@ static int __init kvm_mips_init(void) { int ret; + ret = kvm_mips_entry_setup(); + if (ret) + return ret; + ret = kvm_init(NULL, sizeof(struct kvm_vcpu), 0, THIS_MODULE); if (ret) @@ -1645,18 +1806,6 @@ static int __init kvm_mips_init(void) register_die_notifier(&kvm_mips_csr_die_notifier); - /* - * On MIPS, kernel modules are executed from "mapped space", which - * requires TLBs. The TLB handling code is statically linked with - * the rest of the kernel (tlb.c) to avoid the possibility of - * double faulting. The issue is that the TLB code references - * routines that are part of the the KVM module, which are only - * available once the module is loaded. - */ - kvm_mips_gfn_to_pfn = gfn_to_pfn; - kvm_mips_release_pfn_clean = kvm_release_pfn_clean; - kvm_mips_is_error_pfn = is_error_pfn; - return 0; } @@ -1664,10 +1813,6 @@ static void __exit kvm_mips_exit(void) { kvm_exit(); - kvm_mips_gfn_to_pfn = NULL; - kvm_mips_release_pfn_clean = NULL; - kvm_mips_is_error_pfn = NULL; - unregister_die_notifier(&kvm_mips_csr_die_notifier); } diff --git a/arch/mips/kvm/mmu.c b/arch/mips/kvm/mmu.c new file mode 100644 index 000000000000..57319ee57c4f --- /dev/null +++ b/arch/mips/kvm/mmu.c @@ -0,0 +1,375 @@ +/* + * This file is subject to the terms and conditions of the GNU General Public + * License. See the file "COPYING" in the main directory of this archive + * for more details. + * + * KVM/MIPS MMU handling in the KVM module. + * + * Copyright (C) 2012 MIPS Technologies, Inc. All rights reserved. + * Authors: Sanjay Lal <sanjayl@kymasys.com> + */ + +#include <linux/highmem.h> +#include <linux/kvm_host.h> +#include <asm/mmu_context.h> + +static u32 kvm_mips_get_kernel_asid(struct kvm_vcpu *vcpu) +{ + int cpu = smp_processor_id(); + + return vcpu->arch.guest_kernel_asid[cpu] & + cpu_asid_mask(&cpu_data[cpu]); +} + +static u32 kvm_mips_get_user_asid(struct kvm_vcpu *vcpu) +{ + int cpu = smp_processor_id(); + + return vcpu->arch.guest_user_asid[cpu] & + cpu_asid_mask(&cpu_data[cpu]); +} + +static int kvm_mips_map_page(struct kvm *kvm, gfn_t gfn) +{ + int srcu_idx, err = 0; + kvm_pfn_t pfn; + + if (kvm->arch.guest_pmap[gfn] != KVM_INVALID_PAGE) + return 0; + + srcu_idx = srcu_read_lock(&kvm->srcu); + pfn = gfn_to_pfn(kvm, gfn); + + if (is_error_pfn(pfn)) { + kvm_err("Couldn't get pfn for gfn %#llx!\n", gfn); + err = -EFAULT; + goto out; + } + + kvm->arch.guest_pmap[gfn] = pfn; +out: + srcu_read_unlock(&kvm->srcu, srcu_idx); + return err; +} + +/* Translate guest KSEG0 addresses to Host PA */ +unsigned long kvm_mips_translate_guest_kseg0_to_hpa(struct kvm_vcpu *vcpu, + unsigned long gva) +{ + gfn_t gfn; + unsigned long offset = gva & ~PAGE_MASK; + struct kvm *kvm = vcpu->kvm; + + if (KVM_GUEST_KSEGX(gva) != KVM_GUEST_KSEG0) { + kvm_err("%s/%p: Invalid gva: %#lx\n", __func__, + __builtin_return_address(0), gva); + return KVM_INVALID_PAGE; + } + + gfn = (KVM_GUEST_CPHYSADDR(gva) >> PAGE_SHIFT); + + if (gfn >= kvm->arch.guest_pmap_npages) { + kvm_err("%s: Invalid gfn: %#llx, GVA: %#lx\n", __func__, gfn, + gva); + return KVM_INVALID_PAGE; + } + + if (kvm_mips_map_page(vcpu->kvm, gfn) < 0) + return KVM_INVALID_ADDR; + + return (kvm->arch.guest_pmap[gfn] << PAGE_SHIFT) + offset; +} + +/* XXXKYMA: Must be called with interrupts disabled */ +int kvm_mips_handle_kseg0_tlb_fault(unsigned long badvaddr, + struct kvm_vcpu *vcpu) +{ + gfn_t gfn; + kvm_pfn_t pfn0, pfn1; + unsigned long vaddr = 0; + unsigned long entryhi = 0, entrylo0 = 0, entrylo1 = 0; + struct kvm *kvm = vcpu->kvm; + const int flush_dcache_mask = 0; + int ret; + + if (KVM_GUEST_KSEGX(badvaddr) != KVM_GUEST_KSEG0) { + kvm_err("%s: Invalid BadVaddr: %#lx\n", __func__, badvaddr); + kvm_mips_dump_host_tlbs(); + return -1; + } + + gfn = (KVM_GUEST_CPHYSADDR(badvaddr) >> PAGE_SHIFT); + if (gfn >= kvm->arch.guest_pmap_npages) { + kvm_err("%s: Invalid gfn: %#llx, BadVaddr: %#lx\n", __func__, + gfn, badvaddr); + kvm_mips_dump_host_tlbs(); + return -1; + } + vaddr = badvaddr & (PAGE_MASK << 1); + + if (kvm_mips_map_page(vcpu->kvm, gfn) < 0) + return -1; + + if (kvm_mips_map_page(vcpu->kvm, gfn ^ 0x1) < 0) + return -1; + + pfn0 = kvm->arch.guest_pmap[gfn & ~0x1]; + pfn1 = kvm->arch.guest_pmap[gfn | 0x1]; + + entrylo0 = mips3_paddr_to_tlbpfn(pfn0 << PAGE_SHIFT) | + ((_page_cachable_default >> _CACHE_SHIFT) << ENTRYLO_C_SHIFT) | + ENTRYLO_D | ENTRYLO_V; + entrylo1 = mips3_paddr_to_tlbpfn(pfn1 << PAGE_SHIFT) | + ((_page_cachable_default >> _CACHE_SHIFT) << ENTRYLO_C_SHIFT) | + ENTRYLO_D | ENTRYLO_V; + + preempt_disable(); + entryhi = (vaddr | kvm_mips_get_kernel_asid(vcpu)); + ret = kvm_mips_host_tlb_write(vcpu, entryhi, entrylo0, entrylo1, + flush_dcache_mask); + preempt_enable(); + + return ret; +} + +int kvm_mips_handle_mapped_seg_tlb_fault(struct kvm_vcpu *vcpu, + struct kvm_mips_tlb *tlb) +{ + unsigned long entryhi = 0, entrylo0 = 0, entrylo1 = 0; + struct kvm *kvm = vcpu->kvm; + kvm_pfn_t pfn0, pfn1; + int ret; + + if ((tlb->tlb_hi & VPN2_MASK) == 0) { + pfn0 = 0; + pfn1 = 0; + } else { + if (kvm_mips_map_page(kvm, mips3_tlbpfn_to_paddr(tlb->tlb_lo[0]) + >> PAGE_SHIFT) < 0) + return -1; + + if (kvm_mips_map_page(kvm, mips3_tlbpfn_to_paddr(tlb->tlb_lo[1]) + >> PAGE_SHIFT) < 0) + return -1; + + pfn0 = kvm->arch.guest_pmap[ + mips3_tlbpfn_to_paddr(tlb->tlb_lo[0]) >> PAGE_SHIFT]; + pfn1 = kvm->arch.guest_pmap[ + mips3_tlbpfn_to_paddr(tlb->tlb_lo[1]) >> PAGE_SHIFT]; + } + + /* Get attributes from the Guest TLB */ + entrylo0 = mips3_paddr_to_tlbpfn(pfn0 << PAGE_SHIFT) | + ((_page_cachable_default >> _CACHE_SHIFT) << ENTRYLO_C_SHIFT) | + (tlb->tlb_lo[0] & ENTRYLO_D) | + (tlb->tlb_lo[0] & ENTRYLO_V); + entrylo1 = mips3_paddr_to_tlbpfn(pfn1 << PAGE_SHIFT) | + ((_page_cachable_default >> _CACHE_SHIFT) << ENTRYLO_C_SHIFT) | + (tlb->tlb_lo[1] & ENTRYLO_D) | + (tlb->tlb_lo[1] & ENTRYLO_V); + + kvm_debug("@ %#lx tlb_lo0: 0x%08lx tlb_lo1: 0x%08lx\n", vcpu->arch.pc, + tlb->tlb_lo[0], tlb->tlb_lo[1]); + + preempt_disable(); + entryhi = (tlb->tlb_hi & VPN2_MASK) | (KVM_GUEST_KERNEL_MODE(vcpu) ? + kvm_mips_get_kernel_asid(vcpu) : + kvm_mips_get_user_asid(vcpu)); + ret = kvm_mips_host_tlb_write(vcpu, entryhi, entrylo0, entrylo1, + tlb->tlb_mask); + preempt_enable(); + + return ret; +} + +void kvm_get_new_mmu_context(struct mm_struct *mm, unsigned long cpu, + struct kvm_vcpu *vcpu) +{ + unsigned long asid = asid_cache(cpu); + + asid += cpu_asid_inc(); + if (!(asid & cpu_asid_mask(&cpu_data[cpu]))) { + if (cpu_has_vtag_icache) + flush_icache_all(); + + kvm_local_flush_tlb_all(); /* start new asid cycle */ + + if (!asid) /* fix version if needed */ + asid = asid_first_version(cpu); + } + + cpu_context(cpu, mm) = asid_cache(cpu) = asid; +} + +/** + * kvm_mips_migrate_count() - Migrate timer. + * @vcpu: Virtual CPU. + * + * Migrate CP0_Count hrtimer to the current CPU by cancelling and restarting it + * if it was running prior to being cancelled. + * + * Must be called when the VCPU is migrated to a different CPU to ensure that + * timer expiry during guest execution interrupts the guest and causes the + * interrupt to be delivered in a timely manner. + */ +static void kvm_mips_migrate_count(struct kvm_vcpu *vcpu) +{ + if (hrtimer_cancel(&vcpu->arch.comparecount_timer)) + hrtimer_restart(&vcpu->arch.comparecount_timer); +} + +/* Restore ASID once we are scheduled back after preemption */ +void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu) +{ + unsigned long asid_mask = cpu_asid_mask(&cpu_data[cpu]); + unsigned long flags; + int newasid = 0; + + kvm_debug("%s: vcpu %p, cpu: %d\n", __func__, vcpu, cpu); + + /* Allocate new kernel and user ASIDs if needed */ + + local_irq_save(flags); + + if ((vcpu->arch.guest_kernel_asid[cpu] ^ asid_cache(cpu)) & + asid_version_mask(cpu)) { + kvm_get_new_mmu_context(&vcpu->arch.guest_kernel_mm, cpu, vcpu); + vcpu->arch.guest_kernel_asid[cpu] = + vcpu->arch.guest_kernel_mm.context.asid[cpu]; + kvm_get_new_mmu_context(&vcpu->arch.guest_user_mm, cpu, vcpu); + vcpu->arch.guest_user_asid[cpu] = + vcpu->arch.guest_user_mm.context.asid[cpu]; + newasid++; + + kvm_debug("[%d]: cpu_context: %#lx\n", cpu, + cpu_context(cpu, current->mm)); + kvm_debug("[%d]: Allocated new ASID for Guest Kernel: %#x\n", + cpu, vcpu->arch.guest_kernel_asid[cpu]); + kvm_debug("[%d]: Allocated new ASID for Guest User: %#x\n", cpu, + vcpu->arch.guest_user_asid[cpu]); + } + + if (vcpu->arch.last_sched_cpu != cpu) { + kvm_debug("[%d->%d]KVM VCPU[%d] switch\n", + vcpu->arch.last_sched_cpu, cpu, vcpu->vcpu_id); + /* + * Migrate the timer interrupt to the current CPU so that it + * always interrupts the guest and synchronously triggers a + * guest timer interrupt. + */ + kvm_mips_migrate_count(vcpu); + } + + if (!newasid) { + /* + * If we preempted while the guest was executing, then reload + * the pre-empted ASID + */ + if (current->flags & PF_VCPU) { + write_c0_entryhi(vcpu->arch. + preempt_entryhi & asid_mask); + ehb(); + } + } else { + /* New ASIDs were allocated for the VM */ + + /* + * Were we in guest context? If so then the pre-empted ASID is + * no longer valid, we need to set it to what it should be based + * on the mode of the Guest (Kernel/User) + */ + if (current->flags & PF_VCPU) { + if (KVM_GUEST_KERNEL_MODE(vcpu)) + write_c0_entryhi(vcpu->arch. + guest_kernel_asid[cpu] & + asid_mask); + else + write_c0_entryhi(vcpu->arch. + guest_user_asid[cpu] & + asid_mask); + ehb(); + } + } + + /* restore guest state to registers */ + kvm_mips_callbacks->vcpu_set_regs(vcpu); + + local_irq_restore(flags); + +} + +/* ASID can change if another task is scheduled during preemption */ +void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu) +{ + unsigned long flags; + int cpu; + + local_irq_save(flags); + + cpu = smp_processor_id(); + + vcpu->arch.preempt_entryhi = read_c0_entryhi(); + vcpu->arch.last_sched_cpu = cpu; + + /* save guest state in registers */ + kvm_mips_callbacks->vcpu_get_regs(vcpu); + + if (((cpu_context(cpu, current->mm) ^ asid_cache(cpu)) & + asid_version_mask(cpu))) { + kvm_debug("%s: Dropping MMU Context: %#lx\n", __func__, + cpu_context(cpu, current->mm)); + drop_mmu_context(current->mm, cpu); + } + write_c0_entryhi(cpu_asid(cpu, current->mm)); + ehb(); + + local_irq_restore(flags); +} + +u32 kvm_get_inst(u32 *opc, struct kvm_vcpu *vcpu) +{ + struct mips_coproc *cop0 = vcpu->arch.cop0; + unsigned long paddr, flags, vpn2, asid; + unsigned long va = (unsigned long)opc; + void *vaddr; + u32 inst; + int index; + + if (KVM_GUEST_KSEGX(va) < KVM_GUEST_KSEG0 || + KVM_GUEST_KSEGX(va) == KVM_GUEST_KSEG23) { + local_irq_save(flags); + index = kvm_mips_host_tlb_lookup(vcpu, va); + if (index >= 0) { + inst = *(opc); + } else { + vpn2 = va & VPN2_MASK; + asid = kvm_read_c0_guest_entryhi(cop0) & + KVM_ENTRYHI_ASID; + index = kvm_mips_guest_tlb_lookup(vcpu, vpn2 | asid); + if (index < 0) { + kvm_err("%s: get_user_failed for %p, vcpu: %p, ASID: %#lx\n", + __func__, opc, vcpu, read_c0_entryhi()); + kvm_mips_dump_host_tlbs(); + kvm_mips_dump_guest_tlbs(vcpu); + local_irq_restore(flags); + return KVM_INVALID_INST; + } + kvm_mips_handle_mapped_seg_tlb_fault(vcpu, + &vcpu->arch. + guest_tlb[index]); + inst = *(opc); + } + local_irq_restore(flags); + } else if (KVM_GUEST_KSEGX(va) == KVM_GUEST_KSEG0) { + paddr = kvm_mips_translate_guest_kseg0_to_hpa(vcpu, va); + vaddr = kmap_atomic(pfn_to_page(PHYS_PFN(paddr))); + vaddr += paddr & ~PAGE_MASK; + inst = *(u32 *)vaddr; + kunmap_atomic(vaddr); + } else { + kvm_err("%s: illegal address: %p\n", __func__, opc); + return KVM_INVALID_INST; + } + + return inst; +} diff --git a/arch/mips/kvm/stats.c b/arch/mips/kvm/stats.c index 888bb67070ac..53f851a61554 100644 --- a/arch/mips/kvm/stats.c +++ b/arch/mips/kvm/stats.c @@ -11,27 +11,6 @@ #include <linux/kvm_host.h> -char *kvm_mips_exit_types_str[MAX_KVM_MIPS_EXIT_TYPES] = { - "WAIT", - "CACHE", - "Signal", - "Interrupt", - "COP0/1 Unusable", - "TLB Mod", - "TLB Miss (LD)", - "TLB Miss (ST)", - "Address Err (ST)", - "Address Error (LD)", - "System Call", - "Reserved Inst", - "Break Inst", - "Trap Inst", - "MSA FPE", - "FPE", - "MSA Disabled", - "D-Cache Flushes", -}; - char *kvm_cop0_str[N_MIPS_COPROC_REGS] = { "Index", "Random", diff --git a/arch/mips/kvm/tlb.c b/arch/mips/kvm/tlb.c index ed021ae7867a..254377d8e0b9 100644 --- a/arch/mips/kvm/tlb.c +++ b/arch/mips/kvm/tlb.c @@ -14,7 +14,7 @@ #include <linux/smp.h> #include <linux/mm.h> #include <linux/delay.h> -#include <linux/module.h> +#include <linux/export.h> #include <linux/kvm_host.h> #include <linux/srcu.h> @@ -24,6 +24,7 @@ #include <asm/pgtable.h> #include <asm/cacheflush.h> #include <asm/tlb.h> +#include <asm/tlbdebug.h> #undef CONFIG_MIPS_MT #include <asm/r4kcache.h> @@ -32,22 +33,10 @@ #define KVM_GUEST_PC_TLB 0 #define KVM_GUEST_SP_TLB 1 -#define PRIx64 "llx" - atomic_t kvm_mips_instance; EXPORT_SYMBOL_GPL(kvm_mips_instance); -/* These function pointers are initialized once the KVM module is loaded */ -kvm_pfn_t (*kvm_mips_gfn_to_pfn)(struct kvm *kvm, gfn_t gfn); -EXPORT_SYMBOL_GPL(kvm_mips_gfn_to_pfn); - -void (*kvm_mips_release_pfn_clean)(kvm_pfn_t pfn); -EXPORT_SYMBOL_GPL(kvm_mips_release_pfn_clean); - -bool (*kvm_mips_is_error_pfn)(kvm_pfn_t pfn); -EXPORT_SYMBOL_GPL(kvm_mips_is_error_pfn); - -uint32_t kvm_mips_get_kernel_asid(struct kvm_vcpu *vcpu) +static u32 kvm_mips_get_kernel_asid(struct kvm_vcpu *vcpu) { int cpu = smp_processor_id(); @@ -55,7 +44,7 @@ uint32_t kvm_mips_get_kernel_asid(struct kvm_vcpu *vcpu) cpu_asid_mask(&cpu_data[cpu]); } -uint32_t kvm_mips_get_user_asid(struct kvm_vcpu *vcpu) +static u32 kvm_mips_get_user_asid(struct kvm_vcpu *vcpu) { int cpu = smp_processor_id(); @@ -63,7 +52,7 @@ uint32_t kvm_mips_get_user_asid(struct kvm_vcpu *vcpu) cpu_asid_mask(&cpu_data[cpu]); } -inline uint32_t kvm_mips_get_commpage_asid(struct kvm_vcpu *vcpu) +inline u32 kvm_mips_get_commpage_asid(struct kvm_vcpu *vcpu) { return vcpu->kvm->arch.commpage_tlb; } @@ -72,50 +61,15 @@ inline uint32_t kvm_mips_get_commpage_asid(struct kvm_vcpu *vcpu) void kvm_mips_dump_host_tlbs(void) { - unsigned long old_entryhi; - unsigned long old_pagemask; - struct kvm_mips_tlb tlb; unsigned long flags; - int i; local_irq_save(flags); - old_entryhi = read_c0_entryhi(); - old_pagemask = read_c0_pagemask(); - kvm_info("HOST TLBs:\n"); - kvm_info("ASID: %#lx\n", read_c0_entryhi() & - cpu_asid_mask(¤t_cpu_data)); - - for (i = 0; i < current_cpu_data.tlbsize; i++) { - write_c0_index(i); - mtc0_tlbw_hazard(); - - tlb_read(); - tlbw_use_hazard(); + dump_tlb_regs(); + pr_info("\n"); + dump_tlb_all(); - tlb.tlb_hi = read_c0_entryhi(); - tlb.tlb_lo0 = read_c0_entrylo0(); - tlb.tlb_lo1 = read_c0_entrylo1(); - tlb.tlb_mask = read_c0_pagemask(); - - kvm_info("TLB%c%3d Hi 0x%08lx ", - (tlb.tlb_lo0 | tlb.tlb_lo1) & MIPS3_PG_V ? ' ' : '*', - i, tlb.tlb_hi); - kvm_info("Lo0=0x%09" PRIx64 " %c%c attr %lx ", - (uint64_t) mips3_tlbpfn_to_paddr(tlb.tlb_lo0), - (tlb.tlb_lo0 & MIPS3_PG_D) ? 'D' : ' ', - (tlb.tlb_lo0 & MIPS3_PG_G) ? 'G' : ' ', - (tlb.tlb_lo0 >> 3) & 7); - kvm_info("Lo1=0x%09" PRIx64 " %c%c attr %lx sz=%lx\n", - (uint64_t) mips3_tlbpfn_to_paddr(tlb.tlb_lo1), - (tlb.tlb_lo1 & MIPS3_PG_D) ? 'D' : ' ', - (tlb.tlb_lo1 & MIPS3_PG_G) ? 'G' : ' ', - (tlb.tlb_lo1 >> 3) & 7, tlb.tlb_mask); - } - write_c0_entryhi(old_entryhi); - write_c0_pagemask(old_pagemask); - mtc0_tlbw_hazard(); local_irq_restore(flags); } EXPORT_SYMBOL_GPL(kvm_mips_dump_host_tlbs); @@ -132,74 +86,24 @@ void kvm_mips_dump_guest_tlbs(struct kvm_vcpu *vcpu) for (i = 0; i < KVM_MIPS_GUEST_TLB_SIZE; i++) { tlb = vcpu->arch.guest_tlb[i]; kvm_info("TLB%c%3d Hi 0x%08lx ", - (tlb.tlb_lo0 | tlb.tlb_lo1) & MIPS3_PG_V ? ' ' : '*', + (tlb.tlb_lo[0] | tlb.tlb_lo[1]) & ENTRYLO_V + ? ' ' : '*', i, tlb.tlb_hi); - kvm_info("Lo0=0x%09" PRIx64 " %c%c attr %lx ", - (uint64_t) mips3_tlbpfn_to_paddr(tlb.tlb_lo0), - (tlb.tlb_lo0 & MIPS3_PG_D) ? 'D' : ' ', - (tlb.tlb_lo0 & MIPS3_PG_G) ? 'G' : ' ', - (tlb.tlb_lo0 >> 3) & 7); - kvm_info("Lo1=0x%09" PRIx64 " %c%c attr %lx sz=%lx\n", - (uint64_t) mips3_tlbpfn_to_paddr(tlb.tlb_lo1), - (tlb.tlb_lo1 & MIPS3_PG_D) ? 'D' : ' ', - (tlb.tlb_lo1 & MIPS3_PG_G) ? 'G' : ' ', - (tlb.tlb_lo1 >> 3) & 7, tlb.tlb_mask); + kvm_info("Lo0=0x%09llx %c%c attr %lx ", + (u64) mips3_tlbpfn_to_paddr(tlb.tlb_lo[0]), + (tlb.tlb_lo[0] & ENTRYLO_D) ? 'D' : ' ', + (tlb.tlb_lo[0] & ENTRYLO_G) ? 'G' : ' ', + (tlb.tlb_lo[0] & ENTRYLO_C) >> ENTRYLO_C_SHIFT); + kvm_info("Lo1=0x%09llx %c%c attr %lx sz=%lx\n", + (u64) mips3_tlbpfn_to_paddr(tlb.tlb_lo[1]), + (tlb.tlb_lo[1] & ENTRYLO_D) ? 'D' : ' ', + (tlb.tlb_lo[1] & ENTRYLO_G) ? 'G' : ' ', + (tlb.tlb_lo[1] & ENTRYLO_C) >> ENTRYLO_C_SHIFT, + tlb.tlb_mask); } } EXPORT_SYMBOL_GPL(kvm_mips_dump_guest_tlbs); -static int kvm_mips_map_page(struct kvm *kvm, gfn_t gfn) -{ - int srcu_idx, err = 0; - kvm_pfn_t pfn; - - if (kvm->arch.guest_pmap[gfn] != KVM_INVALID_PAGE) - return 0; - - srcu_idx = srcu_read_lock(&kvm->srcu); - pfn = kvm_mips_gfn_to_pfn(kvm, gfn); - - if (kvm_mips_is_error_pfn(pfn)) { - kvm_err("Couldn't get pfn for gfn %#" PRIx64 "!\n", gfn); - err = -EFAULT; - goto out; - } - - kvm->arch.guest_pmap[gfn] = pfn; -out: - srcu_read_unlock(&kvm->srcu, srcu_idx); - return err; -} - -/* Translate guest KSEG0 addresses to Host PA */ -unsigned long kvm_mips_translate_guest_kseg0_to_hpa(struct kvm_vcpu *vcpu, - unsigned long gva) -{ - gfn_t gfn; - uint32_t offset = gva & ~PAGE_MASK; - struct kvm *kvm = vcpu->kvm; - - if (KVM_GUEST_KSEGX(gva) != KVM_GUEST_KSEG0) { - kvm_err("%s/%p: Invalid gva: %#lx\n", __func__, - __builtin_return_address(0), gva); - return KVM_INVALID_PAGE; - } - - gfn = (KVM_GUEST_CPHYSADDR(gva) >> PAGE_SHIFT); - - if (gfn >= kvm->arch.guest_pmap_npages) { - kvm_err("%s: Invalid gfn: %#llx, GVA: %#lx\n", __func__, gfn, - gva); - return KVM_INVALID_PAGE; - } - - if (kvm_mips_map_page(vcpu->kvm, gfn) < 0) - return KVM_INVALID_ADDR; - - return (kvm->arch.guest_pmap[gfn] << PAGE_SHIFT) + offset; -} -EXPORT_SYMBOL_GPL(kvm_mips_translate_guest_kseg0_to_hpa); - /* XXXKYMA: Must be called with interrupts disabled */ /* set flush_dcache_mask == 0 if no dcache flush required */ int kvm_mips_host_tlb_write(struct kvm_vcpu *vcpu, unsigned long entryhi, @@ -243,12 +147,12 @@ int kvm_mips_host_tlb_write(struct kvm_vcpu *vcpu, unsigned long entryhi, /* Flush D-cache */ if (flush_dcache_mask) { - if (entrylo0 & MIPS3_PG_V) { + if (entrylo0 & ENTRYLO_V) { ++vcpu->stat.flush_dcache_exits; flush_data_cache_page((entryhi & VPN2_MASK) & ~flush_dcache_mask); } - if (entrylo1 & MIPS3_PG_V) { + if (entrylo1 & ENTRYLO_V) { ++vcpu->stat.flush_dcache_exits; flush_data_cache_page(((entryhi & VPN2_MASK) & ~flush_dcache_mask) | @@ -259,96 +163,35 @@ int kvm_mips_host_tlb_write(struct kvm_vcpu *vcpu, unsigned long entryhi, /* Restore old ASID */ write_c0_entryhi(old_entryhi); mtc0_tlbw_hazard(); - tlbw_use_hazard(); local_irq_restore(flags); return 0; } - -/* XXXKYMA: Must be called with interrupts disabled */ -int kvm_mips_handle_kseg0_tlb_fault(unsigned long badvaddr, - struct kvm_vcpu *vcpu) -{ - gfn_t gfn; - kvm_pfn_t pfn0, pfn1; - unsigned long vaddr = 0; - unsigned long entryhi = 0, entrylo0 = 0, entrylo1 = 0; - int even; - struct kvm *kvm = vcpu->kvm; - const int flush_dcache_mask = 0; - int ret; - - if (KVM_GUEST_KSEGX(badvaddr) != KVM_GUEST_KSEG0) { - kvm_err("%s: Invalid BadVaddr: %#lx\n", __func__, badvaddr); - kvm_mips_dump_host_tlbs(); - return -1; - } - - gfn = (KVM_GUEST_CPHYSADDR(badvaddr) >> PAGE_SHIFT); - if (gfn >= kvm->arch.guest_pmap_npages) { - kvm_err("%s: Invalid gfn: %#llx, BadVaddr: %#lx\n", __func__, - gfn, badvaddr); - kvm_mips_dump_host_tlbs(); - return -1; - } - even = !(gfn & 0x1); - vaddr = badvaddr & (PAGE_MASK << 1); - - if (kvm_mips_map_page(vcpu->kvm, gfn) < 0) - return -1; - - if (kvm_mips_map_page(vcpu->kvm, gfn ^ 0x1) < 0) - return -1; - - if (even) { - pfn0 = kvm->arch.guest_pmap[gfn]; - pfn1 = kvm->arch.guest_pmap[gfn ^ 0x1]; - } else { - pfn0 = kvm->arch.guest_pmap[gfn ^ 0x1]; - pfn1 = kvm->arch.guest_pmap[gfn]; - } - - entrylo0 = mips3_paddr_to_tlbpfn(pfn0 << PAGE_SHIFT) | (0x3 << 3) | - (1 << 2) | (0x1 << 1); - entrylo1 = mips3_paddr_to_tlbpfn(pfn1 << PAGE_SHIFT) | (0x3 << 3) | - (1 << 2) | (0x1 << 1); - - preempt_disable(); - entryhi = (vaddr | kvm_mips_get_kernel_asid(vcpu)); - ret = kvm_mips_host_tlb_write(vcpu, entryhi, entrylo0, entrylo1, - flush_dcache_mask); - preempt_enable(); - - return ret; -} -EXPORT_SYMBOL_GPL(kvm_mips_handle_kseg0_tlb_fault); +EXPORT_SYMBOL_GPL(kvm_mips_host_tlb_write); int kvm_mips_handle_commpage_tlb_fault(unsigned long badvaddr, struct kvm_vcpu *vcpu) { - kvm_pfn_t pfn0, pfn1; + kvm_pfn_t pfn; unsigned long flags, old_entryhi = 0, vaddr = 0; - unsigned long entrylo0 = 0, entrylo1 = 0; + unsigned long entrylo[2] = { 0, 0 }; + unsigned int pair_idx; - pfn0 = CPHYSADDR(vcpu->arch.kseg0_commpage) >> PAGE_SHIFT; - pfn1 = 0; - entrylo0 = mips3_paddr_to_tlbpfn(pfn0 << PAGE_SHIFT) | (0x3 << 3) | - (1 << 2) | (0x1 << 1); - entrylo1 = 0; + pfn = PFN_DOWN(virt_to_phys(vcpu->arch.kseg0_commpage)); + pair_idx = (badvaddr >> PAGE_SHIFT) & 1; + entrylo[pair_idx] = mips3_paddr_to_tlbpfn(pfn << PAGE_SHIFT) | + ((_page_cachable_default >> _CACHE_SHIFT) << ENTRYLO_C_SHIFT) | + ENTRYLO_D | ENTRYLO_V; local_irq_save(flags); old_entryhi = read_c0_entryhi(); vaddr = badvaddr & (PAGE_MASK << 1); write_c0_entryhi(vaddr | kvm_mips_get_kernel_asid(vcpu)); - mtc0_tlbw_hazard(); - write_c0_entrylo0(entrylo0); - mtc0_tlbw_hazard(); - write_c0_entrylo1(entrylo1); - mtc0_tlbw_hazard(); + write_c0_entrylo0(entrylo[0]); + write_c0_entrylo1(entrylo[1]); write_c0_index(kvm_mips_get_commpage_asid(vcpu)); mtc0_tlbw_hazard(); tlb_write_indexed(); - mtc0_tlbw_hazard(); tlbw_use_hazard(); kvm_debug("@ %#lx idx: %2d [entryhi(R): %#lx] entrylo0 (R): 0x%08lx, entrylo1(R): 0x%08lx\n", @@ -358,68 +201,12 @@ int kvm_mips_handle_commpage_tlb_fault(unsigned long badvaddr, /* Restore old ASID */ write_c0_entryhi(old_entryhi); mtc0_tlbw_hazard(); - tlbw_use_hazard(); local_irq_restore(flags); return 0; } EXPORT_SYMBOL_GPL(kvm_mips_handle_commpage_tlb_fault); -int kvm_mips_handle_mapped_seg_tlb_fault(struct kvm_vcpu *vcpu, - struct kvm_mips_tlb *tlb, - unsigned long *hpa0, - unsigned long *hpa1) -{ - unsigned long entryhi = 0, entrylo0 = 0, entrylo1 = 0; - struct kvm *kvm = vcpu->kvm; - kvm_pfn_t pfn0, pfn1; - int ret; - - if ((tlb->tlb_hi & VPN2_MASK) == 0) { - pfn0 = 0; - pfn1 = 0; - } else { - if (kvm_mips_map_page(kvm, mips3_tlbpfn_to_paddr(tlb->tlb_lo0) - >> PAGE_SHIFT) < 0) - return -1; - - if (kvm_mips_map_page(kvm, mips3_tlbpfn_to_paddr(tlb->tlb_lo1) - >> PAGE_SHIFT) < 0) - return -1; - - pfn0 = kvm->arch.guest_pmap[mips3_tlbpfn_to_paddr(tlb->tlb_lo0) - >> PAGE_SHIFT]; - pfn1 = kvm->arch.guest_pmap[mips3_tlbpfn_to_paddr(tlb->tlb_lo1) - >> PAGE_SHIFT]; - } - - if (hpa0) - *hpa0 = pfn0 << PAGE_SHIFT; - - if (hpa1) - *hpa1 = pfn1 << PAGE_SHIFT; - - /* Get attributes from the Guest TLB */ - entrylo0 = mips3_paddr_to_tlbpfn(pfn0 << PAGE_SHIFT) | (0x3 << 3) | - (tlb->tlb_lo0 & MIPS3_PG_D) | (tlb->tlb_lo0 & MIPS3_PG_V); - entrylo1 = mips3_paddr_to_tlbpfn(pfn1 << PAGE_SHIFT) | (0x3 << 3) | - (tlb->tlb_lo1 & MIPS3_PG_D) | (tlb->tlb_lo1 & MIPS3_PG_V); - - kvm_debug("@ %#lx tlb_lo0: 0x%08lx tlb_lo1: 0x%08lx\n", vcpu->arch.pc, - tlb->tlb_lo0, tlb->tlb_lo1); - - preempt_disable(); - entryhi = (tlb->tlb_hi & VPN2_MASK) | (KVM_GUEST_KERNEL_MODE(vcpu) ? - kvm_mips_get_kernel_asid(vcpu) : - kvm_mips_get_user_asid(vcpu)); - ret = kvm_mips_host_tlb_write(vcpu, entryhi, entrylo0, entrylo1, - tlb->tlb_mask); - preempt_enable(); - - return ret; -} -EXPORT_SYMBOL_GPL(kvm_mips_handle_mapped_seg_tlb_fault); - int kvm_mips_guest_tlb_lookup(struct kvm_vcpu *vcpu, unsigned long entryhi) { int i; @@ -435,7 +222,7 @@ int kvm_mips_guest_tlb_lookup(struct kvm_vcpu *vcpu, unsigned long entryhi) } kvm_debug("%s: entryhi: %#lx, index: %d lo0: %#lx, lo1: %#lx\n", - __func__, entryhi, index, tlb[i].tlb_lo0, tlb[i].tlb_lo1); + __func__, entryhi, index, tlb[i].tlb_lo[0], tlb[i].tlb_lo[1]); return index; } @@ -467,7 +254,6 @@ int kvm_mips_host_tlb_lookup(struct kvm_vcpu *vcpu, unsigned long vaddr) /* Restore old ASID */ write_c0_entryhi(old_entryhi); mtc0_tlbw_hazard(); - tlbw_use_hazard(); local_irq_restore(flags); @@ -498,21 +284,16 @@ int kvm_mips_host_tlb_inv(struct kvm_vcpu *vcpu, unsigned long va) if (idx > 0) { write_c0_entryhi(UNIQUE_ENTRYHI(idx)); - mtc0_tlbw_hazard(); - write_c0_entrylo0(0); - mtc0_tlbw_hazard(); - write_c0_entrylo1(0); mtc0_tlbw_hazard(); tlb_write_indexed(); - mtc0_tlbw_hazard(); + tlbw_use_hazard(); } write_c0_entryhi(old_entryhi); mtc0_tlbw_hazard(); - tlbw_use_hazard(); local_irq_restore(flags); @@ -540,61 +321,39 @@ void kvm_mips_flush_host_tlb(int skip_kseg0) /* Blast 'em all away. */ for (entry = 0; entry < maxentry; entry++) { write_c0_index(entry); - mtc0_tlbw_hazard(); if (skip_kseg0) { + mtc0_tlbr_hazard(); tlb_read(); - tlbw_use_hazard(); + tlb_read_hazard(); entryhi = read_c0_entryhi(); /* Don't blow away guest kernel entries */ if (KVM_GUEST_KSEGX(entryhi) == KVM_GUEST_KSEG0) continue; + + write_c0_pagemask(old_pagemask); } /* Make sure all entries differ. */ write_c0_entryhi(UNIQUE_ENTRYHI(entry)); - mtc0_tlbw_hazard(); write_c0_entrylo0(0); - mtc0_tlbw_hazard(); write_c0_entrylo1(0); mtc0_tlbw_hazard(); tlb_write_indexed(); - mtc0_tlbw_hazard(); + tlbw_use_hazard(); } - tlbw_use_hazard(); - write_c0_entryhi(old_entryhi); write_c0_pagemask(old_pagemask); mtc0_tlbw_hazard(); - tlbw_use_hazard(); local_irq_restore(flags); } EXPORT_SYMBOL_GPL(kvm_mips_flush_host_tlb); -void kvm_get_new_mmu_context(struct mm_struct *mm, unsigned long cpu, - struct kvm_vcpu *vcpu) -{ - unsigned long asid = asid_cache(cpu); - - asid += cpu_asid_inc(); - if (!(asid & cpu_asid_mask(&cpu_data[cpu]))) { - if (cpu_has_vtag_icache) - flush_icache_all(); - - kvm_local_flush_tlb_all(); /* start new asid cycle */ - - if (!asid) /* fix version if needed */ - asid = asid_first_version(cpu); - } - - cpu_context(cpu, mm) = asid_cache(cpu) = asid; -} - void kvm_local_flush_tlb_all(void) { unsigned long flags; @@ -614,185 +373,12 @@ void kvm_local_flush_tlb_all(void) write_c0_index(entry); mtc0_tlbw_hazard(); tlb_write_indexed(); + tlbw_use_hazard(); entry++; } - tlbw_use_hazard(); write_c0_entryhi(old_ctx); mtc0_tlbw_hazard(); local_irq_restore(flags); } EXPORT_SYMBOL_GPL(kvm_local_flush_tlb_all); - -/** - * kvm_mips_migrate_count() - Migrate timer. - * @vcpu: Virtual CPU. - * - * Migrate CP0_Count hrtimer to the current CPU by cancelling and restarting it - * if it was running prior to being cancelled. - * - * Must be called when the VCPU is migrated to a different CPU to ensure that - * timer expiry during guest execution interrupts the guest and causes the - * interrupt to be delivered in a timely manner. - */ -static void kvm_mips_migrate_count(struct kvm_vcpu *vcpu) -{ - if (hrtimer_cancel(&vcpu->arch.comparecount_timer)) - hrtimer_restart(&vcpu->arch.comparecount_timer); -} - -/* Restore ASID once we are scheduled back after preemption */ -void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu) -{ - unsigned long asid_mask = cpu_asid_mask(&cpu_data[cpu]); - unsigned long flags; - int newasid = 0; - - kvm_debug("%s: vcpu %p, cpu: %d\n", __func__, vcpu, cpu); - - /* Allocate new kernel and user ASIDs if needed */ - - local_irq_save(flags); - - if ((vcpu->arch.guest_kernel_asid[cpu] ^ asid_cache(cpu)) & - asid_version_mask(cpu)) { - kvm_get_new_mmu_context(&vcpu->arch.guest_kernel_mm, cpu, vcpu); - vcpu->arch.guest_kernel_asid[cpu] = - vcpu->arch.guest_kernel_mm.context.asid[cpu]; - kvm_get_new_mmu_context(&vcpu->arch.guest_user_mm, cpu, vcpu); - vcpu->arch.guest_user_asid[cpu] = - vcpu->arch.guest_user_mm.context.asid[cpu]; - newasid++; - - kvm_debug("[%d]: cpu_context: %#lx\n", cpu, - cpu_context(cpu, current->mm)); - kvm_debug("[%d]: Allocated new ASID for Guest Kernel: %#x\n", - cpu, vcpu->arch.guest_kernel_asid[cpu]); - kvm_debug("[%d]: Allocated new ASID for Guest User: %#x\n", cpu, - vcpu->arch.guest_user_asid[cpu]); - } - - if (vcpu->arch.last_sched_cpu != cpu) { - kvm_debug("[%d->%d]KVM VCPU[%d] switch\n", - vcpu->arch.last_sched_cpu, cpu, vcpu->vcpu_id); - /* - * Migrate the timer interrupt to the current CPU so that it - * always interrupts the guest and synchronously triggers a - * guest timer interrupt. - */ - kvm_mips_migrate_count(vcpu); - } - - if (!newasid) { - /* - * If we preempted while the guest was executing, then reload - * the pre-empted ASID - */ - if (current->flags & PF_VCPU) { - write_c0_entryhi(vcpu->arch. - preempt_entryhi & asid_mask); - ehb(); - } - } else { - /* New ASIDs were allocated for the VM */ - - /* - * Were we in guest context? If so then the pre-empted ASID is - * no longer valid, we need to set it to what it should be based - * on the mode of the Guest (Kernel/User) - */ - if (current->flags & PF_VCPU) { - if (KVM_GUEST_KERNEL_MODE(vcpu)) - write_c0_entryhi(vcpu->arch. - guest_kernel_asid[cpu] & - asid_mask); - else - write_c0_entryhi(vcpu->arch. - guest_user_asid[cpu] & - asid_mask); - ehb(); - } - } - - /* restore guest state to registers */ - kvm_mips_callbacks->vcpu_set_regs(vcpu); - - local_irq_restore(flags); - -} -EXPORT_SYMBOL_GPL(kvm_arch_vcpu_load); - -/* ASID can change if another task is scheduled during preemption */ -void kvm_arch_vcpu_put(struct kvm_vcpu *vcpu) -{ - unsigned long flags; - uint32_t cpu; - - local_irq_save(flags); - - cpu = smp_processor_id(); - - vcpu->arch.preempt_entryhi = read_c0_entryhi(); - vcpu->arch.last_sched_cpu = cpu; - - /* save guest state in registers */ - kvm_mips_callbacks->vcpu_get_regs(vcpu); - - if (((cpu_context(cpu, current->mm) ^ asid_cache(cpu)) & - asid_version_mask(cpu))) { - kvm_debug("%s: Dropping MMU Context: %#lx\n", __func__, - cpu_context(cpu, current->mm)); - drop_mmu_context(current->mm, cpu); - } - write_c0_entryhi(cpu_asid(cpu, current->mm)); - ehb(); - - local_irq_restore(flags); -} -EXPORT_SYMBOL_GPL(kvm_arch_vcpu_put); - -uint32_t kvm_get_inst(uint32_t *opc, struct kvm_vcpu *vcpu) -{ - struct mips_coproc *cop0 = vcpu->arch.cop0; - unsigned long paddr, flags, vpn2, asid; - uint32_t inst; - int index; - - if (KVM_GUEST_KSEGX((unsigned long) opc) < KVM_GUEST_KSEG0 || - KVM_GUEST_KSEGX((unsigned long) opc) == KVM_GUEST_KSEG23) { - local_irq_save(flags); - index = kvm_mips_host_tlb_lookup(vcpu, (unsigned long) opc); - if (index >= 0) { - inst = *(opc); - } else { - vpn2 = (unsigned long) opc & VPN2_MASK; - asid = kvm_read_c0_guest_entryhi(cop0) & - KVM_ENTRYHI_ASID; - index = kvm_mips_guest_tlb_lookup(vcpu, vpn2 | asid); - if (index < 0) { - kvm_err("%s: get_user_failed for %p, vcpu: %p, ASID: %#lx\n", - __func__, opc, vcpu, read_c0_entryhi()); - kvm_mips_dump_host_tlbs(); - local_irq_restore(flags); - return KVM_INVALID_INST; - } - kvm_mips_handle_mapped_seg_tlb_fault(vcpu, - &vcpu->arch. - guest_tlb[index], - NULL, NULL); - inst = *(opc); - } - local_irq_restore(flags); - } else if (KVM_GUEST_KSEGX(opc) == KVM_GUEST_KSEG0) { - paddr = - kvm_mips_translate_guest_kseg0_to_hpa(vcpu, - (unsigned long) opc); - inst = *(uint32_t *) CKSEG0ADDR(paddr); - } else { - kvm_err("%s: illegal address: %p\n", __func__, opc); - return KVM_INVALID_INST; - } - - return inst; -} -EXPORT_SYMBOL_GPL(kvm_get_inst); diff --git a/arch/mips/kvm/trace.h b/arch/mips/kvm/trace.h index bd6437f67dc0..c858cf168078 100644 --- a/arch/mips/kvm/trace.h +++ b/arch/mips/kvm/trace.h @@ -17,8 +17,75 @@ #define TRACE_INCLUDE_PATH . #define TRACE_INCLUDE_FILE trace -/* Tracepoints for VM eists */ -extern char *kvm_mips_exit_types_str[MAX_KVM_MIPS_EXIT_TYPES]; +/* + * Tracepoints for VM enters + */ +DECLARE_EVENT_CLASS(kvm_transition, + TP_PROTO(struct kvm_vcpu *vcpu), + TP_ARGS(vcpu), + TP_STRUCT__entry( + __field(unsigned long, pc) + ), + + TP_fast_assign( + __entry->pc = vcpu->arch.pc; + ), + + TP_printk("PC: 0x%08lx", + __entry->pc) +); + +DEFINE_EVENT(kvm_transition, kvm_enter, + TP_PROTO(struct kvm_vcpu *vcpu), + TP_ARGS(vcpu)); + +DEFINE_EVENT(kvm_transition, kvm_reenter, + TP_PROTO(struct kvm_vcpu *vcpu), + TP_ARGS(vcpu)); + +DEFINE_EVENT(kvm_transition, kvm_out, + TP_PROTO(struct kvm_vcpu *vcpu), + TP_ARGS(vcpu)); + +/* The first 32 exit reasons correspond to Cause.ExcCode */ +#define KVM_TRACE_EXIT_INT 0 +#define KVM_TRACE_EXIT_TLBMOD 1 +#define KVM_TRACE_EXIT_TLBMISS_LD 2 +#define KVM_TRACE_EXIT_TLBMISS_ST 3 +#define KVM_TRACE_EXIT_ADDRERR_LD 4 +#define KVM_TRACE_EXIT_ADDRERR_ST 5 +#define KVM_TRACE_EXIT_SYSCALL 8 +#define KVM_TRACE_EXIT_BREAK_INST 9 +#define KVM_TRACE_EXIT_RESVD_INST 10 +#define KVM_TRACE_EXIT_COP_UNUSABLE 11 +#define KVM_TRACE_EXIT_TRAP_INST 13 +#define KVM_TRACE_EXIT_MSA_FPE 14 +#define KVM_TRACE_EXIT_FPE 15 +#define KVM_TRACE_EXIT_MSA_DISABLED 21 +/* Further exit reasons */ +#define KVM_TRACE_EXIT_WAIT 32 +#define KVM_TRACE_EXIT_CACHE 33 +#define KVM_TRACE_EXIT_SIGNAL 34 + +/* Tracepoints for VM exits */ +#define kvm_trace_symbol_exit_types \ + { KVM_TRACE_EXIT_INT, "Interrupt" }, \ + { KVM_TRACE_EXIT_TLBMOD, "TLB Mod" }, \ + { KVM_TRACE_EXIT_TLBMISS_LD, "TLB Miss (LD)" }, \ + { KVM_TRACE_EXIT_TLBMISS_ST, "TLB Miss (ST)" }, \ + { KVM_TRACE_EXIT_ADDRERR_LD, "Address Error (LD)" }, \ + { KVM_TRACE_EXIT_ADDRERR_ST, "Address Err (ST)" }, \ + { KVM_TRACE_EXIT_SYSCALL, "System Call" }, \ + { KVM_TRACE_EXIT_BREAK_INST, "Break Inst" }, \ + { KVM_TRACE_EXIT_RESVD_INST, "Reserved Inst" }, \ + { KVM_TRACE_EXIT_COP_UNUSABLE, "COP0/1 Unusable" }, \ + { KVM_TRACE_EXIT_TRAP_INST, "Trap Inst" }, \ + { KVM_TRACE_EXIT_MSA_FPE, "MSA FPE" }, \ + { KVM_TRACE_EXIT_FPE, "FPE" }, \ + { KVM_TRACE_EXIT_MSA_DISABLED, "MSA Disabled" }, \ + { KVM_TRACE_EXIT_WAIT, "WAIT" }, \ + { KVM_TRACE_EXIT_CACHE, "CACHE" }, \ + { KVM_TRACE_EXIT_SIGNAL, "Signal" } TRACE_EVENT(kvm_exit, TP_PROTO(struct kvm_vcpu *vcpu, unsigned int reason), @@ -34,10 +101,173 @@ TRACE_EVENT(kvm_exit, ), TP_printk("[%s]PC: 0x%08lx", - kvm_mips_exit_types_str[__entry->reason], + __print_symbolic(__entry->reason, + kvm_trace_symbol_exit_types), __entry->pc) ); +#define KVM_TRACE_MFC0 0 +#define KVM_TRACE_MTC0 1 +#define KVM_TRACE_DMFC0 2 +#define KVM_TRACE_DMTC0 3 +#define KVM_TRACE_RDHWR 4 + +#define KVM_TRACE_HWR_COP0 0 +#define KVM_TRACE_HWR_HWR 1 + +#define KVM_TRACE_COP0(REG, SEL) ((KVM_TRACE_HWR_COP0 << 8) | \ + ((REG) << 3) | (SEL)) +#define KVM_TRACE_HWR(REG, SEL) ((KVM_TRACE_HWR_HWR << 8) | \ + ((REG) << 3) | (SEL)) + +#define kvm_trace_symbol_hwr_ops \ + { KVM_TRACE_MFC0, "MFC0" }, \ + { KVM_TRACE_MTC0, "MTC0" }, \ + { KVM_TRACE_DMFC0, "DMFC0" }, \ + { KVM_TRACE_DMTC0, "DMTC0" }, \ + { KVM_TRACE_RDHWR, "RDHWR" } + +#define kvm_trace_symbol_hwr_cop \ + { KVM_TRACE_HWR_COP0, "COP0" }, \ + { KVM_TRACE_HWR_HWR, "HWR" } + +#define kvm_trace_symbol_hwr_regs \ + { KVM_TRACE_COP0( 0, 0), "Index" }, \ + { KVM_TRACE_COP0( 2, 0), "EntryLo0" }, \ + { KVM_TRACE_COP0( 3, 0), "EntryLo1" }, \ + { KVM_TRACE_COP0( 4, 0), "Context" }, \ + { KVM_TRACE_COP0( 4, 2), "UserLocal" }, \ + { KVM_TRACE_COP0( 5, 0), "PageMask" }, \ + { KVM_TRACE_COP0( 6, 0), "Wired" }, \ + { KVM_TRACE_COP0( 7, 0), "HWREna" }, \ + { KVM_TRACE_COP0( 8, 0), "BadVAddr" }, \ + { KVM_TRACE_COP0( 9, 0), "Count" }, \ + { KVM_TRACE_COP0(10, 0), "EntryHi" }, \ + { KVM_TRACE_COP0(11, 0), "Compare" }, \ + { KVM_TRACE_COP0(12, 0), "Status" }, \ + { KVM_TRACE_COP0(12, 1), "IntCtl" }, \ + { KVM_TRACE_COP0(12, 2), "SRSCtl" }, \ + { KVM_TRACE_COP0(13, 0), "Cause" }, \ + { KVM_TRACE_COP0(14, 0), "EPC" }, \ + { KVM_TRACE_COP0(15, 0), "PRId" }, \ + { KVM_TRACE_COP0(15, 1), "EBase" }, \ + { KVM_TRACE_COP0(16, 0), "Config" }, \ + { KVM_TRACE_COP0(16, 1), "Config1" }, \ + { KVM_TRACE_COP0(16, 2), "Config2" }, \ + { KVM_TRACE_COP0(16, 3), "Config3" }, \ + { KVM_TRACE_COP0(16, 4), "Config4" }, \ + { KVM_TRACE_COP0(16, 5), "Config5" }, \ + { KVM_TRACE_COP0(16, 7), "Config7" }, \ + { KVM_TRACE_COP0(26, 0), "ECC" }, \ + { KVM_TRACE_COP0(30, 0), "ErrorEPC" }, \ + { KVM_TRACE_COP0(31, 2), "KScratch1" }, \ + { KVM_TRACE_COP0(31, 3), "KScratch2" }, \ + { KVM_TRACE_COP0(31, 4), "KScratch3" }, \ + { KVM_TRACE_COP0(31, 5), "KScratch4" }, \ + { KVM_TRACE_COP0(31, 6), "KScratch5" }, \ + { KVM_TRACE_COP0(31, 7), "KScratch6" }, \ + { KVM_TRACE_HWR( 0, 0), "CPUNum" }, \ + { KVM_TRACE_HWR( 1, 0), "SYNCI_Step" }, \ + { KVM_TRACE_HWR( 2, 0), "CC" }, \ + { KVM_TRACE_HWR( 3, 0), "CCRes" }, \ + { KVM_TRACE_HWR(29, 0), "ULR" } + +TRACE_EVENT(kvm_hwr, + TP_PROTO(struct kvm_vcpu *vcpu, unsigned int op, unsigned int reg, + unsigned long val), + TP_ARGS(vcpu, op, reg, val), + TP_STRUCT__entry( + __field(unsigned long, val) + __field(u16, reg) + __field(u8, op) + ), + + TP_fast_assign( + __entry->val = val; + __entry->reg = reg; + __entry->op = op; + ), + + TP_printk("%s %s (%s:%u:%u) 0x%08lx", + __print_symbolic(__entry->op, + kvm_trace_symbol_hwr_ops), + __print_symbolic(__entry->reg, + kvm_trace_symbol_hwr_regs), + __print_symbolic(__entry->reg >> 8, + kvm_trace_symbol_hwr_cop), + (__entry->reg >> 3) & 0x1f, + __entry->reg & 0x7, + __entry->val) +); + +#define KVM_TRACE_AUX_RESTORE 0 +#define KVM_TRACE_AUX_SAVE 1 +#define KVM_TRACE_AUX_ENABLE 2 +#define KVM_TRACE_AUX_DISABLE 3 +#define KVM_TRACE_AUX_DISCARD 4 + +#define KVM_TRACE_AUX_FPU 1 +#define KVM_TRACE_AUX_MSA 2 +#define KVM_TRACE_AUX_FPU_MSA 3 + +#define kvm_trace_symbol_aux_op \ + { KVM_TRACE_AUX_RESTORE, "restore" }, \ + { KVM_TRACE_AUX_SAVE, "save" }, \ + { KVM_TRACE_AUX_ENABLE, "enable" }, \ + { KVM_TRACE_AUX_DISABLE, "disable" }, \ + { KVM_TRACE_AUX_DISCARD, "discard" } + +#define kvm_trace_symbol_aux_state \ + { KVM_TRACE_AUX_FPU, "FPU" }, \ + { KVM_TRACE_AUX_MSA, "MSA" }, \ + { KVM_TRACE_AUX_FPU_MSA, "FPU & MSA" } + +TRACE_EVENT(kvm_aux, + TP_PROTO(struct kvm_vcpu *vcpu, unsigned int op, + unsigned int state), + TP_ARGS(vcpu, op, state), + TP_STRUCT__entry( + __field(unsigned long, pc) + __field(u8, op) + __field(u8, state) + ), + + TP_fast_assign( + __entry->pc = vcpu->arch.pc; + __entry->op = op; + __entry->state = state; + ), + + TP_printk("%s %s PC: 0x%08lx", + __print_symbolic(__entry->op, + kvm_trace_symbol_aux_op), + __print_symbolic(__entry->state, + kvm_trace_symbol_aux_state), + __entry->pc) +); + +TRACE_EVENT(kvm_asid_change, + TP_PROTO(struct kvm_vcpu *vcpu, unsigned int old_asid, + unsigned int new_asid), + TP_ARGS(vcpu, old_asid, new_asid), + TP_STRUCT__entry( + __field(unsigned long, pc) + __field(u8, old_asid) + __field(u8, new_asid) + ), + + TP_fast_assign( + __entry->pc = vcpu->arch.pc; + __entry->old_asid = old_asid; + __entry->new_asid = new_asid; + ), + + TP_printk("PC: 0x%08lx old: 0x%02x new: 0x%02x", + __entry->pc, + __entry->old_asid, + __entry->new_asid) +); + #endif /* _TRACE_KVM_H */ /* This part must be outside protection */ diff --git a/arch/mips/kvm/trap_emul.c b/arch/mips/kvm/trap_emul.c index 6ba0fafcecbc..091553942bcb 100644 --- a/arch/mips/kvm/trap_emul.c +++ b/arch/mips/kvm/trap_emul.c @@ -21,7 +21,7 @@ static gpa_t kvm_trap_emul_gva_to_gpa_cb(gva_t gva) { gpa_t gpa; - uint32_t kseg = KSEGX(gva); + gva_t kseg = KSEGX(gva); if ((kseg == CKSEG0) || (kseg == CKSEG1)) gpa = CPHYSADDR(gva); @@ -40,8 +40,8 @@ static int kvm_trap_emul_handle_cop_unusable(struct kvm_vcpu *vcpu) { struct mips_coproc *cop0 = vcpu->arch.cop0; struct kvm_run *run = vcpu->run; - uint32_t __user *opc = (uint32_t __user *) vcpu->arch.pc; - unsigned long cause = vcpu->arch.host_cp0_cause; + u32 __user *opc = (u32 __user *) vcpu->arch.pc; + u32 cause = vcpu->arch.host_cp0_cause; enum emulation_result er = EMULATE_DONE; int ret = RESUME_GUEST; @@ -87,15 +87,15 @@ static int kvm_trap_emul_handle_cop_unusable(struct kvm_vcpu *vcpu) static int kvm_trap_emul_handle_tlb_mod(struct kvm_vcpu *vcpu) { struct kvm_run *run = vcpu->run; - uint32_t __user *opc = (uint32_t __user *) vcpu->arch.pc; + u32 __user *opc = (u32 __user *) vcpu->arch.pc; unsigned long badvaddr = vcpu->arch.host_cp0_badvaddr; - unsigned long cause = vcpu->arch.host_cp0_cause; + u32 cause = vcpu->arch.host_cp0_cause; enum emulation_result er = EMULATE_DONE; int ret = RESUME_GUEST; if (KVM_GUEST_KSEGX(badvaddr) < KVM_GUEST_KSEG0 || KVM_GUEST_KSEGX(badvaddr) == KVM_GUEST_KSEG23) { - kvm_debug("USER/KSEG23 ADDR TLB MOD fault: cause %#lx, PC: %p, BadVaddr: %#lx\n", + kvm_debug("USER/KSEG23 ADDR TLB MOD fault: cause %#x, PC: %p, BadVaddr: %#lx\n", cause, opc, badvaddr); er = kvm_mips_handle_tlbmod(cause, opc, run, vcpu); @@ -111,14 +111,14 @@ static int kvm_trap_emul_handle_tlb_mod(struct kvm_vcpu *vcpu) * when we are not using HIGHMEM. Need to address this in a * HIGHMEM kernel */ - kvm_err("TLB MOD fault not handled, cause %#lx, PC: %p, BadVaddr: %#lx\n", + kvm_err("TLB MOD fault not handled, cause %#x, PC: %p, BadVaddr: %#lx\n", cause, opc, badvaddr); kvm_mips_dump_host_tlbs(); kvm_arch_vcpu_dump_regs(vcpu); run->exit_reason = KVM_EXIT_INTERNAL_ERROR; ret = RESUME_HOST; } else { - kvm_err("Illegal TLB Mod fault address , cause %#lx, PC: %p, BadVaddr: %#lx\n", + kvm_err("Illegal TLB Mod fault address , cause %#x, PC: %p, BadVaddr: %#lx\n", cause, opc, badvaddr); kvm_mips_dump_host_tlbs(); kvm_arch_vcpu_dump_regs(vcpu); @@ -128,59 +128,12 @@ static int kvm_trap_emul_handle_tlb_mod(struct kvm_vcpu *vcpu) return ret; } -static int kvm_trap_emul_handle_tlb_st_miss(struct kvm_vcpu *vcpu) -{ - struct kvm_run *run = vcpu->run; - uint32_t __user *opc = (uint32_t __user *) vcpu->arch.pc; - unsigned long badvaddr = vcpu->arch.host_cp0_badvaddr; - unsigned long cause = vcpu->arch.host_cp0_cause; - enum emulation_result er = EMULATE_DONE; - int ret = RESUME_GUEST; - - if (((badvaddr & PAGE_MASK) == KVM_GUEST_COMMPAGE_ADDR) - && KVM_GUEST_KERNEL_MODE(vcpu)) { - if (kvm_mips_handle_commpage_tlb_fault(badvaddr, vcpu) < 0) { - run->exit_reason = KVM_EXIT_INTERNAL_ERROR; - ret = RESUME_HOST; - } - } else if (KVM_GUEST_KSEGX(badvaddr) < KVM_GUEST_KSEG0 - || KVM_GUEST_KSEGX(badvaddr) == KVM_GUEST_KSEG23) { - kvm_debug("USER ADDR TLB LD fault: cause %#lx, PC: %p, BadVaddr: %#lx\n", - cause, opc, badvaddr); - er = kvm_mips_handle_tlbmiss(cause, opc, run, vcpu); - if (er == EMULATE_DONE) - ret = RESUME_GUEST; - else { - run->exit_reason = KVM_EXIT_INTERNAL_ERROR; - ret = RESUME_HOST; - } - } else if (KVM_GUEST_KSEGX(badvaddr) == KVM_GUEST_KSEG0) { - /* - * All KSEG0 faults are handled by KVM, as the guest kernel does - * not expect to ever get them - */ - if (kvm_mips_handle_kseg0_tlb_fault - (vcpu->arch.host_cp0_badvaddr, vcpu) < 0) { - run->exit_reason = KVM_EXIT_INTERNAL_ERROR; - ret = RESUME_HOST; - } - } else { - kvm_err("Illegal TLB LD fault address , cause %#lx, PC: %p, BadVaddr: %#lx\n", - cause, opc, badvaddr); - kvm_mips_dump_host_tlbs(); - kvm_arch_vcpu_dump_regs(vcpu); - run->exit_reason = KVM_EXIT_INTERNAL_ERROR; - ret = RESUME_HOST; - } - return ret; -} - -static int kvm_trap_emul_handle_tlb_ld_miss(struct kvm_vcpu *vcpu) +static int kvm_trap_emul_handle_tlb_miss(struct kvm_vcpu *vcpu, bool store) { struct kvm_run *run = vcpu->run; - uint32_t __user *opc = (uint32_t __user *) vcpu->arch.pc; + u32 __user *opc = (u32 __user *) vcpu->arch.pc; unsigned long badvaddr = vcpu->arch.host_cp0_badvaddr; - unsigned long cause = vcpu->arch.host_cp0_cause; + u32 cause = vcpu->arch.host_cp0_cause; enum emulation_result er = EMULATE_DONE; int ret = RESUME_GUEST; @@ -192,8 +145,8 @@ static int kvm_trap_emul_handle_tlb_ld_miss(struct kvm_vcpu *vcpu) } } else if (KVM_GUEST_KSEGX(badvaddr) < KVM_GUEST_KSEG0 || KVM_GUEST_KSEGX(badvaddr) == KVM_GUEST_KSEG23) { - kvm_debug("USER ADDR TLB ST fault: PC: %#lx, BadVaddr: %#lx\n", - vcpu->arch.pc, badvaddr); + kvm_debug("USER ADDR TLB %s fault: cause %#x, PC: %p, BadVaddr: %#lx\n", + store ? "ST" : "LD", cause, opc, badvaddr); /* * User Address (UA) fault, this could happen if @@ -213,14 +166,18 @@ static int kvm_trap_emul_handle_tlb_ld_miss(struct kvm_vcpu *vcpu) ret = RESUME_HOST; } } else if (KVM_GUEST_KSEGX(badvaddr) == KVM_GUEST_KSEG0) { + /* + * All KSEG0 faults are handled by KVM, as the guest kernel does + * not expect to ever get them + */ if (kvm_mips_handle_kseg0_tlb_fault (vcpu->arch.host_cp0_badvaddr, vcpu) < 0) { run->exit_reason = KVM_EXIT_INTERNAL_ERROR; ret = RESUME_HOST; } } else { - kvm_err("Illegal TLB ST fault address , cause %#lx, PC: %p, BadVaddr: %#lx\n", - cause, opc, badvaddr); + kvm_err("Illegal TLB %s fault address , cause %#x, PC: %p, BadVaddr: %#lx\n", + store ? "ST" : "LD", cause, opc, badvaddr); kvm_mips_dump_host_tlbs(); kvm_arch_vcpu_dump_regs(vcpu); run->exit_reason = KVM_EXIT_INTERNAL_ERROR; @@ -229,12 +186,22 @@ static int kvm_trap_emul_handle_tlb_ld_miss(struct kvm_vcpu *vcpu) return ret; } +static int kvm_trap_emul_handle_tlb_st_miss(struct kvm_vcpu *vcpu) +{ + return kvm_trap_emul_handle_tlb_miss(vcpu, true); +} + +static int kvm_trap_emul_handle_tlb_ld_miss(struct kvm_vcpu *vcpu) +{ + return kvm_trap_emul_handle_tlb_miss(vcpu, false); +} + static int kvm_trap_emul_handle_addr_err_st(struct kvm_vcpu *vcpu) { struct kvm_run *run = vcpu->run; - uint32_t __user *opc = (uint32_t __user *) vcpu->arch.pc; + u32 __user *opc = (u32 __user *) vcpu->arch.pc; unsigned long badvaddr = vcpu->arch.host_cp0_badvaddr; - unsigned long cause = vcpu->arch.host_cp0_cause; + u32 cause = vcpu->arch.host_cp0_cause; enum emulation_result er = EMULATE_DONE; int ret = RESUME_GUEST; @@ -251,7 +218,7 @@ static int kvm_trap_emul_handle_addr_err_st(struct kvm_vcpu *vcpu) ret = RESUME_HOST; } } else { - kvm_err("Address Error (STORE): cause %#lx, PC: %p, BadVaddr: %#lx\n", + kvm_err("Address Error (STORE): cause %#x, PC: %p, BadVaddr: %#lx\n", cause, opc, badvaddr); run->exit_reason = KVM_EXIT_INTERNAL_ERROR; ret = RESUME_HOST; @@ -262,9 +229,9 @@ static int kvm_trap_emul_handle_addr_err_st(struct kvm_vcpu *vcpu) static int kvm_trap_emul_handle_addr_err_ld(struct kvm_vcpu *vcpu) { struct kvm_run *run = vcpu->run; - uint32_t __user *opc = (uint32_t __user *) vcpu->arch.pc; + u32 __user *opc = (u32 __user *) vcpu->arch.pc; unsigned long badvaddr = vcpu->arch.host_cp0_badvaddr; - unsigned long cause = vcpu->arch.host_cp0_cause; + u32 cause = vcpu->arch.host_cp0_cause; enum emulation_result er = EMULATE_DONE; int ret = RESUME_GUEST; @@ -280,7 +247,7 @@ static int kvm_trap_emul_handle_addr_err_ld(struct kvm_vcpu *vcpu) ret = RESUME_HOST; } } else { - kvm_err("Address Error (LOAD): cause %#lx, PC: %p, BadVaddr: %#lx\n", + kvm_err("Address Error (LOAD): cause %#x, PC: %p, BadVaddr: %#lx\n", cause, opc, badvaddr); run->exit_reason = KVM_EXIT_INTERNAL_ERROR; ret = RESUME_HOST; @@ -292,8 +259,8 @@ static int kvm_trap_emul_handle_addr_err_ld(struct kvm_vcpu *vcpu) static int kvm_trap_emul_handle_syscall(struct kvm_vcpu *vcpu) { struct kvm_run *run = vcpu->run; - uint32_t __user *opc = (uint32_t __user *) vcpu->arch.pc; - unsigned long cause = vcpu->arch.host_cp0_cause; + u32 __user *opc = (u32 __user *) vcpu->arch.pc; + u32 cause = vcpu->arch.host_cp0_cause; enum emulation_result er = EMULATE_DONE; int ret = RESUME_GUEST; @@ -310,8 +277,8 @@ static int kvm_trap_emul_handle_syscall(struct kvm_vcpu *vcpu) static int kvm_trap_emul_handle_res_inst(struct kvm_vcpu *vcpu) { struct kvm_run *run = vcpu->run; - uint32_t __user *opc = (uint32_t __user *) vcpu->arch.pc; - unsigned long cause = vcpu->arch.host_cp0_cause; + u32 __user *opc = (u32 __user *) vcpu->arch.pc; + u32 cause = vcpu->arch.host_cp0_cause; enum emulation_result er = EMULATE_DONE; int ret = RESUME_GUEST; @@ -328,8 +295,8 @@ static int kvm_trap_emul_handle_res_inst(struct kvm_vcpu *vcpu) static int kvm_trap_emul_handle_break(struct kvm_vcpu *vcpu) { struct kvm_run *run = vcpu->run; - uint32_t __user *opc = (uint32_t __user *) vcpu->arch.pc; - unsigned long cause = vcpu->arch.host_cp0_cause; + u32 __user *opc = (u32 __user *) vcpu->arch.pc; + u32 cause = vcpu->arch.host_cp0_cause; enum emulation_result er = EMULATE_DONE; int ret = RESUME_GUEST; @@ -346,8 +313,8 @@ static int kvm_trap_emul_handle_break(struct kvm_vcpu *vcpu) static int kvm_trap_emul_handle_trap(struct kvm_vcpu *vcpu) { struct kvm_run *run = vcpu->run; - uint32_t __user *opc = (uint32_t __user *)vcpu->arch.pc; - unsigned long cause = vcpu->arch.host_cp0_cause; + u32 __user *opc = (u32 __user *)vcpu->arch.pc; + u32 cause = vcpu->arch.host_cp0_cause; enum emulation_result er = EMULATE_DONE; int ret = RESUME_GUEST; @@ -364,8 +331,8 @@ static int kvm_trap_emul_handle_trap(struct kvm_vcpu *vcpu) static int kvm_trap_emul_handle_msa_fpe(struct kvm_vcpu *vcpu) { struct kvm_run *run = vcpu->run; - uint32_t __user *opc = (uint32_t __user *)vcpu->arch.pc; - unsigned long cause = vcpu->arch.host_cp0_cause; + u32 __user *opc = (u32 __user *)vcpu->arch.pc; + u32 cause = vcpu->arch.host_cp0_cause; enum emulation_result er = EMULATE_DONE; int ret = RESUME_GUEST; @@ -382,8 +349,8 @@ static int kvm_trap_emul_handle_msa_fpe(struct kvm_vcpu *vcpu) static int kvm_trap_emul_handle_fpe(struct kvm_vcpu *vcpu) { struct kvm_run *run = vcpu->run; - uint32_t __user *opc = (uint32_t __user *)vcpu->arch.pc; - unsigned long cause = vcpu->arch.host_cp0_cause; + u32 __user *opc = (u32 __user *)vcpu->arch.pc; + u32 cause = vcpu->arch.host_cp0_cause; enum emulation_result er = EMULATE_DONE; int ret = RESUME_GUEST; @@ -407,8 +374,8 @@ static int kvm_trap_emul_handle_msa_disabled(struct kvm_vcpu *vcpu) { struct mips_coproc *cop0 = vcpu->arch.cop0; struct kvm_run *run = vcpu->run; - uint32_t __user *opc = (uint32_t __user *) vcpu->arch.pc; - unsigned long cause = vcpu->arch.host_cp0_cause; + u32 __user *opc = (u32 __user *) vcpu->arch.pc; + u32 cause = vcpu->arch.host_cp0_cause; enum emulation_result er = EMULATE_DONE; int ret = RESUME_GUEST; @@ -451,24 +418,41 @@ static int kvm_trap_emul_vm_init(struct kvm *kvm) static int kvm_trap_emul_vcpu_init(struct kvm_vcpu *vcpu) { + vcpu->arch.kscratch_enabled = 0xfc; + return 0; } static int kvm_trap_emul_vcpu_setup(struct kvm_vcpu *vcpu) { struct mips_coproc *cop0 = vcpu->arch.cop0; - uint32_t config1; + u32 config, config1; int vcpu_id = vcpu->vcpu_id; /* * Arch specific stuff, set up config registers properly so that the - * guest will come up as expected, for now we simulate a MIPS 24kc + * guest will come up as expected */ +#ifndef CONFIG_CPU_MIPSR6 + /* r2-r5, simulate a MIPS 24kc */ kvm_write_c0_guest_prid(cop0, 0x00019300); - /* Have config1, Cacheable, noncoherent, write-back, write allocate */ - kvm_write_c0_guest_config(cop0, MIPS_CONF_M | (0x3 << CP0C0_K0) | - (0x1 << CP0C0_AR) | - (MMU_TYPE_R4000 << CP0C0_MT)); +#else + /* r6+, simulate a generic QEMU machine */ + kvm_write_c0_guest_prid(cop0, 0x00010000); +#endif + /* + * Have config1, Cacheable, noncoherent, write-back, write allocate. + * Endianness, arch revision & virtually tagged icache should match + * host. + */ + config = read_c0_config() & MIPS_CONF_AR; + config |= MIPS_CONF_M | CONF_CM_CACHABLE_NONCOHERENT | MIPS_CONF_MT_TLB; +#ifdef CONFIG_CPU_BIG_ENDIAN + config |= CONF_BE; +#endif + if (cpu_has_vtag_icache) + config |= MIPS_CONF_VI; + kvm_write_c0_guest_config(cop0, config); /* Read the cache characteristics from the host Config1 Register */ config1 = (read_c0_config1() & ~0x7f); @@ -478,9 +462,8 @@ static int kvm_trap_emul_vcpu_setup(struct kvm_vcpu *vcpu) config1 |= ((KVM_MIPS_GUEST_TLB_SIZE - 1) << 25); /* We unset some bits that we aren't emulating */ - config1 &= - ~((1 << CP0C1_C2) | (1 << CP0C1_MD) | (1 << CP0C1_PC) | - (1 << CP0C1_WR) | (1 << CP0C1_CA)); + config1 &= ~(MIPS_CONF1_C2 | MIPS_CONF1_MD | MIPS_CONF1_PC | + MIPS_CONF1_WR | MIPS_CONF1_CA); kvm_write_c0_guest_config1(cop0, config1); /* Have config3, no tertiary/secondary caches implemented */ @@ -511,6 +494,17 @@ static int kvm_trap_emul_vcpu_setup(struct kvm_vcpu *vcpu) return 0; } +static unsigned long kvm_trap_emul_num_regs(struct kvm_vcpu *vcpu) +{ + return 0; +} + +static int kvm_trap_emul_copy_reg_indices(struct kvm_vcpu *vcpu, + u64 __user *indices) +{ + return 0; +} + static int kvm_trap_emul_get_one_reg(struct kvm_vcpu *vcpu, const struct kvm_one_reg *reg, s64 *v) @@ -660,6 +654,8 @@ static struct kvm_mips_callbacks kvm_trap_emul_callbacks = { .dequeue_io_int = kvm_mips_dequeue_io_int_cb, .irq_deliver = kvm_mips_irq_deliver_cb, .irq_clear = kvm_mips_irq_clear_cb, + .num_regs = kvm_trap_emul_num_regs, + .copy_reg_indices = kvm_trap_emul_copy_reg_indices, .get_one_reg = kvm_trap_emul_get_one_reg, .set_one_reg = kvm_trap_emul_set_one_reg, .vcpu_get_regs = kvm_trap_emul_vcpu_get_regs, diff --git a/arch/mips/math-emu/cp1emu.c b/arch/mips/math-emu/cp1emu.c index d96e912b9d44..6dc07fba187f 100644 --- a/arch/mips/math-emu/cp1emu.c +++ b/arch/mips/math-emu/cp1emu.c @@ -627,8 +627,8 @@ static int isBranchInstr(struct pt_regs *regs, struct mm_decoded_insn dec_insn, dec_insn.pc_inc + dec_insn.next_pc_inc; return 1; - case cbcond0_op: - case cbcond1_op: + case pop10_op: + case pop30_op: if (!cpu_has_mips_r6) break; if (insn.i_format.rt && !insn.i_format.rs) @@ -683,14 +683,14 @@ static int isBranchInstr(struct pt_regs *regs, struct mm_decoded_insn dec_insn, dec_insn.next_pc_inc; return 1; - case beqzcjic_op: + case pop66_op: if (!cpu_has_mips_r6) break; *contpc = regs->cp0_epc + dec_insn.pc_inc + dec_insn.next_pc_inc; return 1; - case bnezcjialc_op: + case pop76_op: if (!cpu_has_mips_r6) break; if (!insn.i_format.rs) diff --git a/arch/mips/mm/c-r4k.c b/arch/mips/mm/c-r4k.c index ef7f925dd1b0..7a9c345e87e5 100644 --- a/arch/mips/mm/c-r4k.c +++ b/arch/mips/mm/c-r4k.c @@ -1206,7 +1206,7 @@ static void probe_pcache(void) c->icache.linesz; c->icache.waybit = __ffs(icache_size/c->icache.ways); - if (config & 0x8) /* VI bit */ + if (config & MIPS_CONF_VI) c->icache.flags |= MIPS_CACHE_VTAG; /* diff --git a/arch/mips/mm/uasm-micromips.c b/arch/mips/mm/uasm-micromips.c index d78178daea4b..277cf52d80e1 100644 --- a/arch/mips/mm/uasm-micromips.c +++ b/arch/mips/mm/uasm-micromips.c @@ -53,8 +53,13 @@ static struct insn insn_table_MM[] = { { insn_bltzl, 0, 0 }, { insn_bne, M(mm_bne32_op, 0, 0, 0, 0, 0), RT | RS | BIMM }, { insn_cache, M(mm_pool32b_op, 0, 0, mm_cache_func, 0, 0), RT | RS | SIMM }, + { insn_cfc1, M(mm_pool32f_op, 0, 0, 0, mm_cfc1_op, mm_32f_73_op), RT | RS }, + { insn_cfcmsa, M(mm_pool32s_op, 0, msa_cfc_op, 0, 0, mm_32s_elm_op), RD | RE }, + { insn_ctc1, M(mm_pool32f_op, 0, 0, 0, mm_ctc1_op, mm_32f_73_op), RT | RS }, + { insn_ctcmsa, M(mm_pool32s_op, 0, msa_ctc_op, 0, 0, mm_32s_elm_op), RD | RE }, { insn_daddu, 0, 0 }, { insn_daddiu, 0, 0 }, + { insn_di, M(mm_pool32a_op, 0, 0, 0, mm_di_op, mm_pool32axf_op), RS }, { insn_divu, M(mm_pool32a_op, 0, 0, 0, mm_divu_op, mm_pool32axf_op), RT | RS }, { insn_dmfc0, 0, 0 }, { insn_dmtc0, 0, 0 }, @@ -84,6 +89,8 @@ static struct insn insn_table_MM[] = { { insn_mfhi, M(mm_pool32a_op, 0, 0, 0, mm_mfhi32_op, mm_pool32axf_op), RS }, { insn_mflo, M(mm_pool32a_op, 0, 0, 0, mm_mflo32_op, mm_pool32axf_op), RS }, { insn_mtc0, M(mm_pool32a_op, 0, 0, 0, mm_mtc0_op, mm_pool32axf_op), RT | RS | RD }, + { insn_mthi, M(mm_pool32a_op, 0, 0, 0, mm_mthi32_op, mm_pool32axf_op), RS }, + { insn_mtlo, M(mm_pool32a_op, 0, 0, 0, mm_mtlo32_op, mm_pool32axf_op), RS }, { insn_mul, M(mm_pool32a_op, 0, 0, 0, 0, mm_mul_op), RT | RS | RD }, { insn_or, M(mm_pool32a_op, 0, 0, 0, 0, mm_or32_op), RT | RS | RD }, { insn_ori, M(mm_ori32_op, 0, 0, 0, 0, 0), RT | RS | UIMM }, @@ -166,13 +173,15 @@ static void build_insn(u32 **buf, enum opcode opc, ...) op = ip->match; va_start(ap, opc); if (ip->fields & RS) { - if (opc == insn_mfc0 || opc == insn_mtc0) + if (opc == insn_mfc0 || opc == insn_mtc0 || + opc == insn_cfc1 || opc == insn_ctc1) op |= build_rt(va_arg(ap, u32)); else op |= build_rs(va_arg(ap, u32)); } if (ip->fields & RT) { - if (opc == insn_mfc0 || opc == insn_mtc0) + if (opc == insn_mfc0 || opc == insn_mtc0 || + opc == insn_cfc1 || opc == insn_ctc1) op |= build_rs(va_arg(ap, u32)); else op |= build_rt(va_arg(ap, u32)); diff --git a/arch/mips/mm/uasm-mips.c b/arch/mips/mm/uasm-mips.c index 9c2220a45189..cec524167822 100644 --- a/arch/mips/mm/uasm-mips.c +++ b/arch/mips/mm/uasm-mips.c @@ -67,9 +67,14 @@ static struct insn insn_table[] = { #else { insn_cache, M6(cache_op, 0, 0, 0, cache6_op), RS | RT | SIMM9 }, #endif + { insn_cfc1, M(cop1_op, cfc_op, 0, 0, 0, 0), RT | RD }, + { insn_cfcmsa, M(msa_op, 0, msa_cfc_op, 0, 0, msa_elm_op), RD | RE }, + { insn_ctc1, M(cop1_op, ctc_op, 0, 0, 0, 0), RT | RD }, + { insn_ctcmsa, M(msa_op, 0, msa_ctc_op, 0, 0, msa_elm_op), RD | RE }, { insn_daddiu, M(daddiu_op, 0, 0, 0, 0, 0), RS | RT | SIMM }, { insn_daddu, M(spec_op, 0, 0, 0, 0, daddu_op), RS | RT | RD }, { insn_dinsm, M(spec3_op, 0, 0, 0, 0, dinsm_op), RS | RT | RD | RE }, + { insn_di, M(cop0_op, mfmc0_op, 0, 12, 0, 0), RT }, { insn_dins, M(spec3_op, 0, 0, 0, 0, dins_op), RS | RT | RD | RE }, { insn_divu, M(spec_op, 0, 0, 0, 0, divu_op), RS | RT }, { insn_dmfc0, M(cop0_op, dmfc_op, 0, 0, 0, 0), RT | RD | SET}, @@ -114,7 +119,13 @@ static struct insn insn_table[] = { { insn_mflo, M(spec_op, 0, 0, 0, 0, mflo_op), RD }, { insn_mtc0, M(cop0_op, mtc_op, 0, 0, 0, 0), RT | RD | SET}, { insn_mthc0, M(cop0_op, mthc0_op, 0, 0, 0, 0), RT | RD | SET}, + { insn_mthi, M(spec_op, 0, 0, 0, 0, mthi_op), RS }, + { insn_mtlo, M(spec_op, 0, 0, 0, 0, mtlo_op), RS }, +#ifndef CONFIG_CPU_MIPSR6 { insn_mul, M(spec2_op, 0, 0, 0, 0, mul_op), RS | RT | RD}, +#else + { insn_mul, M(spec_op, 0, 0, 0, mult_mul_op, mult_op), RS | RT | RD}, +#endif { insn_ori, M(ori_op, 0, 0, 0, 0, 0), RS | RT | UIMM }, { insn_or, M(spec_op, 0, 0, 0, 0, or_op), RS | RT | RD }, #ifndef CONFIG_CPU_MIPSR6 diff --git a/arch/mips/mm/uasm.c b/arch/mips/mm/uasm.c index ad718debc35a..3e0282d301d6 100644 --- a/arch/mips/mm/uasm.c +++ b/arch/mips/mm/uasm.c @@ -49,18 +49,19 @@ enum opcode { insn_invalid, insn_addiu, insn_addu, insn_and, insn_andi, insn_bbit0, insn_bbit1, insn_beq, insn_beql, insn_bgez, insn_bgezl, insn_bltz, insn_bltzl, - insn_bne, insn_cache, insn_daddiu, insn_daddu, insn_dins, insn_dinsm, - insn_divu, insn_dmfc0, insn_dmtc0, insn_drotr, insn_drotr32, insn_dsll, + insn_bne, insn_cache, insn_cfc1, insn_cfcmsa, insn_ctc1, insn_ctcmsa, + insn_daddiu, insn_daddu, insn_di, insn_dins, insn_dinsm, insn_divu, + insn_dmfc0, insn_dmtc0, insn_drotr, insn_drotr32, insn_dsll, insn_dsll32, insn_dsra, insn_dsrl, insn_dsrl32, insn_dsubu, insn_eret, insn_ext, insn_ins, insn_j, insn_jal, insn_jalr, insn_jr, insn_lb, insn_ld, insn_ldx, insn_lh, insn_ll, insn_lld, insn_lui, insn_lw, insn_lwx, insn_mfc0, insn_mfhc0, insn_mfhi, insn_mflo, insn_mtc0, - insn_mthc0, insn_mul, insn_or, insn_ori, insn_pref, insn_rfe, - insn_rotr, insn_sc, insn_scd, insn_sd, insn_sll, insn_sllv, insn_slt, - insn_sltiu, insn_sltu, insn_sra, insn_srl, insn_srlv, insn_subu, - insn_sw, insn_sync, insn_syscall, insn_tlbp, insn_tlbr, insn_tlbwi, - insn_tlbwr, insn_wait, insn_wsbh, insn_xor, insn_xori, insn_yield, - insn_lddir, insn_ldpte, + insn_mthc0, insn_mthi, insn_mtlo, insn_mul, insn_or, insn_ori, + insn_pref, insn_rfe, insn_rotr, insn_sc, insn_scd, insn_sd, insn_sll, + insn_sllv, insn_slt, insn_sltiu, insn_sltu, insn_sra, insn_srl, + insn_srlv, insn_subu, insn_sw, insn_sync, insn_syscall, insn_tlbp, + insn_tlbr, insn_tlbwi, insn_tlbwr, insn_wait, insn_wsbh, insn_xor, + insn_xori, insn_yield, insn_lddir, insn_ldpte, }; struct insn { @@ -268,10 +269,15 @@ I_u1s2(_bltz) I_u1s2(_bltzl) I_u1u2s3(_bne) I_u2s3u1(_cache) +I_u1u2(_cfc1) +I_u2u1(_cfcmsa) +I_u1u2(_ctc1) +I_u2u1(_ctcmsa) I_u1u2u3(_dmfc0) I_u1u2u3(_dmtc0) I_u2u1s3(_daddiu) I_u3u1u2(_daddu) +I_u1(_di); I_u1u2(_divu) I_u2u1u3(_dsll) I_u2u1u3(_dsll32) @@ -301,6 +307,8 @@ I_u1(_mfhi) I_u1(_mflo) I_u1u2u3(_mtc0) I_u1u2u3(_mthc0) +I_u1(_mthi) +I_u1(_mtlo) I_u3u1u2(_mul) I_u2u1u3(_ori) I_u3u1u2(_or) |