/* * qemu/kvm integration, x86 specific code * * Copyright (C) 2006-2008 Qumranet Technologies * * Licensed under the terms of the GNU GPL version 2 or higher. */ #include "config.h" #include "config-host.h" #include #include "hw/hw.h" #include "gdbstub.h" #include #include "qemu-kvm.h" #include "libkvm.h" #include #include #include #include #include "kvm.h" #include "hw/apic.h" #define MSR_IA32_TSC 0x10 static struct kvm_msr_list *kvm_msr_list; extern unsigned int kvm_shadow_memory; static int kvm_has_msr_star; static int kvm_has_vm_hsave_pa; static int lm_capable_kernel; int kvm_set_tss_addr(kvm_context_t kvm, unsigned long addr) { #ifdef KVM_CAP_SET_TSS_ADDR int r; /* * Tell fw_cfg to notify the BIOS to reserve the range. */ if (e820_add_entry(addr, 0x4000, E820_RESERVED) < 0) { perror("e820_add_entry() table is full"); exit(1); } r = kvm_ioctl(kvm_state, KVM_CHECK_EXTENSION, KVM_CAP_SET_TSS_ADDR); if (r > 0) { r = kvm_vm_ioctl(kvm_state, KVM_SET_TSS_ADDR, addr); if (r < 0) { fprintf(stderr, "kvm_set_tss_addr: %m\n"); return r; } return 0; } #endif return -ENOSYS; } static int kvm_init_tss(kvm_context_t kvm) { #ifdef KVM_CAP_SET_TSS_ADDR int r; r = kvm_ioctl(kvm_state, KVM_CHECK_EXTENSION, KVM_CAP_SET_TSS_ADDR); if (r > 0) { /* * this address is 3 pages before the bios, and the bios should present * as unavaible memory */ r = kvm_set_tss_addr(kvm, 0xfeffd000); if (r < 0) { fprintf(stderr, "kvm_init_tss: unable to set tss addr\n"); return r; } } #endif return 0; } static int kvm_set_identity_map_addr(kvm_context_t kvm, uint64_t addr) { #ifdef KVM_CAP_SET_IDENTITY_MAP_ADDR int r; r = kvm_ioctl(kvm_state, KVM_CHECK_EXTENSION, KVM_CAP_SET_IDENTITY_MAP_ADDR); if (r > 0) { r = kvm_vm_ioctl(kvm_state, KVM_SET_IDENTITY_MAP_ADDR, &addr); if (r == -1) { fprintf(stderr, "kvm_set_identity_map_addr: %m\n"); return -errno; } return 0; } #endif return -ENOSYS; } static int kvm_init_identity_map_page(kvm_context_t kvm) { #ifdef KVM_CAP_SET_IDENTITY_MAP_ADDR int r; r = kvm_ioctl(kvm_state, KVM_CHECK_EXTENSION, KVM_CAP_SET_IDENTITY_MAP_ADDR); if (r > 0) { /* * this address is 4 pages before the bios, and the bios should present * as unavaible memory */ r = kvm_set_identity_map_addr(kvm, 0xfeffc000); if (r < 0) { fprintf(stderr, "kvm_init_identity_map_page: " "unable to set identity mapping addr\n"); return r; } } #endif return 0; } static int kvm_create_pit(kvm_context_t kvm) { #ifdef KVM_CAP_PIT int r; kvm_state->pit_in_kernel = 0; if (!kvm->no_pit_creation) { r = kvm_ioctl(kvm_state, KVM_CHECK_EXTENSION, KVM_CAP_PIT); if (r > 0) { r = kvm_vm_ioctl(kvm_state, KVM_CREATE_PIT); if (r >= 0) kvm_state->pit_in_kernel = 1; else { fprintf(stderr, "Create kernel PIC irqchip failed\n"); return r; } } } #endif return 0; } int kvm_arch_create(kvm_context_t kvm, unsigned long phys_mem_bytes, void **vm_mem) { int r = 0; r = kvm_init_tss(kvm); if (r < 0) return r; r = kvm_init_identity_map_page(kvm); if (r < 0) return r; r = kvm_create_pit(kvm); if (r < 0) return r; r = kvm_init_coalesced_mmio(kvm); if (r < 0) return r; return 0; } #ifdef KVM_EXIT_TPR_ACCESS static int kvm_handle_tpr_access(CPUState *env) { struct kvm_run *run = env->kvm_run; kvm_tpr_access_report(env, run->tpr_access.rip, run->tpr_access.is_write); return 0; } int kvm_enable_vapic(CPUState *env, uint64_t vapic) { struct kvm_vapic_addr va = { .vapic_addr = vapic, }; return kvm_vcpu_ioctl(env, KVM_SET_VAPIC_ADDR, &va); } #endif int kvm_arch_run(CPUState *env) { int r = 0; struct kvm_run *run = env->kvm_run; switch (run->exit_reason) { #ifdef KVM_EXIT_SET_TPR case KVM_EXIT_SET_TPR: break; #endif #ifdef KVM_EXIT_TPR_ACCESS case KVM_EXIT_TPR_ACCESS: r = kvm_handle_tpr_access(env); break; #endif default: r = 1; break; } return r; } #ifdef KVM_CAP_IRQCHIP int kvm_get_lapic(CPUState *env, struct kvm_lapic_state *s) { int r = 0; if (!kvm_irqchip_in_kernel()) return r; r = kvm_vcpu_ioctl(env, KVM_GET_LAPIC, s); if (r < 0) fprintf(stderr, "KVM_GET_LAPIC failed\n"); return r; } int kvm_set_lapic(CPUState *env, struct kvm_lapic_state *s) { int r = 0; if (!kvm_irqchip_in_kernel()) return 0; r = kvm_vcpu_ioctl(env, KVM_SET_LAPIC, s); if (r < 0) fprintf(stderr, "KVM_SET_LAPIC failed\n"); return r; } #endif #ifdef KVM_CAP_PIT int kvm_get_pit(kvm_context_t kvm, struct kvm_pit_state *s) { if (!kvm_pit_in_kernel()) return 0; return kvm_vm_ioctl(kvm_state, KVM_GET_PIT, s); } int kvm_set_pit(kvm_context_t kvm, struct kvm_pit_state *s) { if (!kvm_pit_in_kernel()) return 0; return kvm_vm_ioctl(kvm_state, KVM_SET_PIT, s); } #ifdef KVM_CAP_PIT_STATE2 int kvm_get_pit2(kvm_context_t kvm, struct kvm_pit_state2 *ps2) { if (!kvm_pit_in_kernel()) return 0; return kvm_vm_ioctl(kvm_state, KVM_GET_PIT2, ps2); } int kvm_set_pit2(kvm_context_t kvm, struct kvm_pit_state2 *ps2) { if (!kvm_pit_in_kernel()) return 0; return kvm_vm_ioctl(kvm_state, KVM_SET_PIT2, ps2); } #endif #endif int kvm_has_pit_state2(kvm_context_t kvm) { int r = 0; #ifdef KVM_CAP_PIT_STATE2 r = kvm_check_extension(kvm_state, KVM_CAP_PIT_STATE2); #endif return r; } void kvm_show_code(CPUState *env) { #define SHOW_CODE_LEN 50 struct kvm_regs regs; struct kvm_sregs sregs; int r, n; int back_offset; unsigned char code; char code_str[SHOW_CODE_LEN * 3 + 1]; unsigned long rip; r = kvm_vcpu_ioctl(env, KVM_GET_SREGS, &sregs); if (r < 0 ) { perror("KVM_GET_SREGS"); return; } r = kvm_vcpu_ioctl(env, KVM_GET_REGS, ®s); if (r < 0) { perror("KVM_GET_REGS"); return; } rip = sregs.cs.base + regs.rip; back_offset = regs.rip; if (back_offset > 20) back_offset = 20; *code_str = 0; for (n = -back_offset; n < SHOW_CODE_LEN-back_offset; ++n) { if (n == 0) strcat(code_str, " -->"); cpu_physical_memory_rw(rip + n, &code, 1, 1); sprintf(code_str + strlen(code_str), " %02x", code); } fprintf(stderr, "code:%s\n", code_str); } /* * Returns available msr list. User must free. */ struct kvm_msr_list *kvm_get_msr_list(kvm_context_t kvm) { struct kvm_msr_list sizer, *msrs; int r; sizer.nmsrs = 0; r = kvm_ioctl(kvm_state, KVM_GET_MSR_INDEX_LIST, &sizer); if (r < 0 && r != -E2BIG) return NULL; /* Old kernel modules had a bug and could write beyond the provided memory. Allocate at least a safe amount of 1K. */ msrs = qemu_malloc(MAX(1024, sizeof(*msrs) + sizer.nmsrs * sizeof(*msrs->indices))); msrs->nmsrs = sizer.nmsrs; r = kvm_ioctl(kvm_state, KVM_GET_MSR_INDEX_LIST, msrs); if (r < 0) { free(msrs); errno = r; return NULL; } return msrs; } int kvm_get_msrs(CPUState *env, struct kvm_msr_entry *msrs, int n) { struct kvm_msrs *kmsrs = qemu_malloc(sizeof *kmsrs + n * sizeof *msrs); int r; kmsrs->nmsrs = n; memcpy(kmsrs->entries, msrs, n * sizeof *msrs); r = kvm_vcpu_ioctl(env, KVM_GET_MSRS, kmsrs); memcpy(msrs, kmsrs->entries, n * sizeof *msrs); free(kmsrs); return r; } int kvm_set_msrs(CPUState *env, struct kvm_msr_entry *msrs, int n) { struct kvm_msrs *kmsrs = qemu_malloc(sizeof *kmsrs + n * sizeof *msrs); int r; kmsrs->nmsrs = n; memcpy(kmsrs->entries, msrs, n * sizeof *msrs); r = kvm_vcpu_ioctl(env, KVM_SET_MSRS, kmsrs); free(kmsrs); return r; } int kvm_get_mce_cap_supported(kvm_context_t kvm, uint64_t *mce_cap, int *max_banks) { #ifdef KVM_CAP_MCE int r; r = kvm_ioctl(kvm_state, KVM_CHECK_EXTENSION, KVM_CAP_MCE); if (r > 0) { *max_banks = r; return kvm_ioctl(kvm_state, KVM_X86_GET_MCE_CAP_SUPPORTED, mce_cap); } #endif return -ENOSYS; } int kvm_setup_mce(CPUState *env, uint64_t *mcg_cap) { #ifdef KVM_CAP_MCE return kvm_vcpu_ioctl(env, KVM_X86_SETUP_MCE, mcg_cap); #else return -ENOSYS; #endif } int kvm_set_mce(CPUState *env, struct kvm_x86_mce *m) { #ifdef KVM_CAP_MCE return kvm_vcpu_ioctl(env, KVM_X86_SET_MCE, m); #else return -ENOSYS; #endif } static void print_seg(FILE *file, const char *name, struct kvm_segment *seg) { fprintf(stderr, "%s %04x (%08llx/%08x p %d dpl %d db %d s %d type %x l %d" " g %d avl %d)\n", name, seg->selector, seg->base, seg->limit, seg->present, seg->dpl, seg->db, seg->s, seg->type, seg->l, seg->g, seg->avl); } static void print_dt(FILE *file, const char *name, struct kvm_dtable *dt) { fprintf(stderr, "%s %llx/%x\n", name, dt->base, dt->limit); } void kvm_show_regs(CPUState *env) { struct kvm_regs regs; struct kvm_sregs sregs; int r; r = kvm_vcpu_ioctl(env, KVM_GET_REGS, ®s); if (r < 0) { perror("KVM_GET_REGS"); return; } fprintf(stderr, "rax %016llx rbx %016llx rcx %016llx rdx %016llx\n" "rsi %016llx rdi %016llx rsp %016llx rbp %016llx\n" "r8 %016llx r9 %016llx r10 %016llx r11 %016llx\n" "r12 %016llx r13 %016llx r14 %016llx r15 %016llx\n" "rip %016llx rflags %08llx\n", regs.rax, regs.rbx, regs.rcx, regs.rdx, regs.rsi, regs.rdi, regs.rsp, regs.rbp, regs.r8, regs.r9, regs.r10, regs.r11, regs.r12, regs.r13, regs.r14, regs.r15, regs.rip, regs.rflags); r = kvm_vcpu_ioctl(env, KVM_GET_SREGS, &sregs); if (r < 0) { perror("KVM_GET_SREGS"); return; } print_seg(stderr, "cs", &sregs.cs); print_seg(stderr, "ds", &sregs.ds); print_seg(stderr, "es", &sregs.es); print_seg(stderr, "ss", &sregs.ss); print_seg(stderr, "fs", &sregs.fs); print_seg(stderr, "gs", &sregs.gs); print_seg(stderr, "tr", &sregs.tr); print_seg(stderr, "ldt", &sregs.ldt); print_dt(stderr, "gdt", &sregs.gdt); print_dt(stderr, "idt", &sregs.idt); fprintf(stderr, "cr0 %llx cr2 %llx cr3 %llx cr4 %llx cr8 %llx" " efer %llx\n", sregs.cr0, sregs.cr2, sregs.cr3, sregs.cr4, sregs.cr8, sregs.efer); } static void kvm_set_cr8(CPUState *env, uint64_t cr8) { env->kvm_run->cr8 = cr8; } int kvm_setup_cpuid(CPUState *env, int nent, struct kvm_cpuid_entry *entries) { struct kvm_cpuid *cpuid; int r; cpuid = qemu_malloc(sizeof(*cpuid) + nent * sizeof(*entries)); cpuid->nent = nent; memcpy(cpuid->entries, entries, nent * sizeof(*entries)); r = kvm_vcpu_ioctl(env, KVM_SET_CPUID, cpuid); free(cpuid); return r; } int kvm_setup_cpuid2(CPUState *env, int nent, struct kvm_cpuid_entry2 *entries) { struct kvm_cpuid2 *cpuid; int r; cpuid = qemu_malloc(sizeof(*cpuid) + nent * sizeof(*entries)); cpuid->nent = nent; memcpy(cpuid->entries, entries, nent * sizeof(*entries)); r = kvm_vcpu_ioctl(env, KVM_SET_CPUID2, cpuid); free(cpuid); return r; } int kvm_set_shadow_pages(kvm_context_t kvm, unsigned int nrshadow_pages) { #ifdef KVM_CAP_MMU_SHADOW_CACHE_CONTROL int r; r = kvm_ioctl(kvm_state, KVM_CHECK_EXTENSION, KVM_CAP_MMU_SHADOW_CACHE_CONTROL); if (r > 0) { r = kvm_vm_ioctl(kvm_state, KVM_SET_NR_MMU_PAGES, nrshadow_pages); if (r < 0) { fprintf(stderr, "kvm_set_shadow_pages: %m\n"); return r; } return 0; } #endif return -1; } int kvm_get_shadow_pages(kvm_context_t kvm, unsigned int *nrshadow_pages) { #ifdef KVM_CAP_MMU_SHADOW_CACHE_CONTROL int r; r = kvm_ioctl(kvm_state, KVM_CHECK_EXTENSION, KVM_CAP_MMU_SHADOW_CACHE_CONTROL); if (r > 0) { *nrshadow_pages = kvm_vm_ioctl(kvm_state, KVM_GET_NR_MMU_PAGES); return 0; } #endif return -1; } #ifdef KVM_CAP_VAPIC static int kvm_enable_tpr_access_reporting(CPUState *env) { int r; struct kvm_tpr_access_ctl tac = { .enabled = 1 }; r = kvm_ioctl(env->kvm_state, KVM_CHECK_EXTENSION, KVM_CAP_VAPIC); if (r <= 0) return -ENOSYS; return kvm_vcpu_ioctl(env, KVM_TPR_ACCESS_REPORTING, &tac); } #endif #ifdef KVM_CAP_ADJUST_CLOCK static struct kvm_clock_data kvmclock_data; static void kvmclock_pre_save(void *opaque) { struct kvm_clock_data *cl = opaque; kvm_vm_ioctl(kvm_state, KVM_GET_CLOCK, cl); } static int kvmclock_post_load(void *opaque, int version_id) { struct kvm_clock_data *cl = opaque; return kvm_vm_ioctl(kvm_state, KVM_SET_CLOCK, cl); } static const VMStateDescription vmstate_kvmclock= { .name = "kvmclock", .version_id = 1, .minimum_version_id = 1, .minimum_version_id_old = 1, .pre_save = kvmclock_pre_save, .post_load = kvmclock_post_load, .fields = (VMStateField []) { VMSTATE_U64(clock, struct kvm_clock_data), VMSTATE_END_OF_LIST() } }; #endif int kvm_arch_qemu_create_context(void) { int i, r; struct utsname utsname; uname(&utsname); lm_capable_kernel = strcmp(utsname.machine, "x86_64") == 0; if (kvm_shadow_memory) kvm_set_shadow_pages(kvm_context, kvm_shadow_memory); kvm_msr_list = kvm_get_msr_list(kvm_context); if (!kvm_msr_list) return -1; for (i = 0; i < kvm_msr_list->nmsrs; ++i) { if (kvm_msr_list->indices[i] == MSR_STAR) kvm_has_msr_star = 1; if (kvm_msr_list->indices[i] == MSR_VM_HSAVE_PA) kvm_has_vm_hsave_pa = 1; } #ifdef KVM_CAP_ADJUST_CLOCK if (kvm_check_extension(kvm_state, KVM_CAP_ADJUST_CLOCK)) vmstate_register(0, &vmstate_kvmclock, &kvmclock_data); #endif r = kvm_set_boot_cpu_id(0); if (r < 0 && r != -ENOSYS) { return r; } return 0; } /* returns 0 on success, non-0 on failure */ static int get_msr_entry(struct kvm_msr_entry *entry, CPUState *env) { switch (entry->index) { case MSR_IA32_SYSENTER_CS: env->sysenter_cs = entry->data; break; case MSR_IA32_SYSENTER_ESP: env->sysenter_esp = entry->data; break; case MSR_IA32_SYSENTER_EIP: env->sysenter_eip = entry->data; break; case MSR_STAR: env->star = entry->data; break; #ifdef TARGET_X86_64 case MSR_CSTAR: env->cstar = entry->data; break; case MSR_KERNELGSBASE: env->kernelgsbase = entry->data; break; case MSR_FMASK: env->fmask = entry->data; break; case MSR_LSTAR: env->lstar = entry->data; break; #endif case MSR_IA32_TSC: env->tsc = entry->data; break; case MSR_VM_HSAVE_PA: env->vm_hsave = entry->data; break; case MSR_KVM_SYSTEM_TIME: env->system_time_msr = entry->data; break; case MSR_KVM_WALL_CLOCK: env->wall_clock_msr = entry->data; break; #ifdef KVM_CAP_MCE case MSR_MCG_STATUS: env->mcg_status = entry->data; break; case MSR_MCG_CTL: env->mcg_ctl = entry->data; break; #endif default: #ifdef KVM_CAP_MCE if (entry->index >= MSR_MC0_CTL && \ entry->index < MSR_MC0_CTL + (env->mcg_cap & 0xff) * 4) { env->mce_banks[entry->index - MSR_MC0_CTL] = entry->data; break; } #endif printf("Warning unknown msr index 0x%x\n", entry->index); return 1; } return 0; } static void kvm_arch_save_mpstate(CPUState *env) { #ifdef KVM_CAP_MP_STATE int r; struct kvm_mp_state mp_state; r = kvm_get_mpstate(env, &mp_state); if (r < 0) { env->mp_state = -1; } else { env->mp_state = mp_state.mp_state; if (kvm_irqchip_in_kernel()) { env->halted = (env->mp_state == KVM_MP_STATE_HALTED); } } #else env->mp_state = -1; #endif } static void kvm_arch_load_mpstate(CPUState *env) { #ifdef KVM_CAP_MP_STATE struct kvm_mp_state mp_state; /* * -1 indicates that the host did not support GET_MP_STATE ioctl, * so don't touch it. */ if (env->mp_state != -1) { mp_state.mp_state = env->mp_state; kvm_set_mpstate(env, &mp_state); } #endif } static void kvm_reset_mpstate(CPUState *env) { #ifdef KVM_CAP_MP_STATE if (kvm_check_extension(kvm_state, KVM_CAP_MP_STATE)) { if (kvm_irqchip_in_kernel()) { env->mp_state = cpu_is_bsp(env) ? KVM_MP_STATE_RUNNABLE : KVM_MP_STATE_UNINITIALIZED; } else { env->mp_state = KVM_MP_STATE_RUNNABLE; } } #endif } static void set_v8086_seg(struct kvm_segment *lhs, const SegmentCache *rhs) { lhs->selector = rhs->selector; lhs->base = rhs->base; lhs->limit = rhs->limit; lhs->type = 3; lhs->present = 1; lhs->dpl = 3; lhs->db = 0; lhs->s = 1; lhs->l = 0; lhs->g = 0; lhs->avl = 0; lhs->unusable = 0; } static void set_seg(struct kvm_segment *lhs, const SegmentCache *rhs) { unsigned flags = rhs->flags; lhs->selector = rhs->selector; lhs->base = rhs->base; lhs->limit = rhs->limit; lhs->type = (flags >> DESC_TYPE_SHIFT) & 15; lhs->present = (flags & DESC_P_MASK) != 0; lhs->dpl = rhs->selector & 3; lhs->db = (flags >> DESC_B_SHIFT) & 1; lhs->s = (flags & DESC_S_MASK) != 0; lhs->l = (flags >> DESC_L_SHIFT) & 1; lhs->g = (flags & DESC_G_MASK) != 0; lhs->avl = (flags & DESC_AVL_MASK) != 0; lhs->unusable = 0; } static void get_seg(SegmentCache *lhs, const struct kvm_segment *rhs) { lhs->selector = rhs->selector; lhs->base = rhs->base; lhs->limit = rhs->limit; lhs->flags = (rhs->type << DESC_TYPE_SHIFT) | (rhs->present * DESC_P_MASK) | (rhs->dpl << DESC_DPL_SHIFT) | (rhs->db << DESC_B_SHIFT) | (rhs->s * DESC_S_MASK) | (rhs->l << DESC_L_SHIFT) | (rhs->g * DESC_G_MASK) | (rhs->avl * DESC_AVL_MASK); } void kvm_arch_load_regs(CPUState *env, int level) { struct kvm_regs regs; struct kvm_fpu fpu; struct kvm_sregs sregs; struct kvm_msr_entry msrs[100]; int rc, n, i; assert(kvm_cpu_is_stopped(env) || env->thread_id == kvm_get_thread_id()); regs.rax = env->regs[R_EAX]; regs.rbx = env->regs[R_EBX]; regs.rcx = env->regs[R_ECX]; regs.rdx = env->regs[R_EDX]; regs.rsi = env->regs[R_ESI]; regs.rdi = env->regs[R_EDI]; regs.rsp = env->regs[R_ESP]; regs.rbp = env->regs[R_EBP]; #ifdef TARGET_X86_64 regs.r8 = env->regs[8]; regs.r9 = env->regs[9]; regs.r10 = env->regs[10]; regs.r11 = env->regs[11]; regs.r12 = env->regs[12]; regs.r13 = env->regs[13]; regs.r14 = env->regs[14]; regs.r15 = env->regs[15]; #endif regs.rflags = env->eflags; regs.rip = env->eip; kvm_set_regs(env, ®s); memset(&fpu, 0, sizeof fpu); fpu.fsw = env->fpus & ~(7 << 11); fpu.fsw |= (env->fpstt & 7) << 11; fpu.fcw = env->fpuc; for (i = 0; i < 8; ++i) fpu.ftwx |= (!env->fptags[i]) << i; memcpy(fpu.fpr, env->fpregs, sizeof env->fpregs); memcpy(fpu.xmm, env->xmm_regs, sizeof env->xmm_regs); fpu.mxcsr = env->mxcsr; kvm_set_fpu(env, &fpu); memset(sregs.interrupt_bitmap, 0, sizeof(sregs.interrupt_bitmap)); if (env->interrupt_injected >= 0) { sregs.interrupt_bitmap[env->interrupt_injected / 64] |= (uint64_t)1 << (env->interrupt_injected % 64); } if ((env->eflags & VM_MASK)) { set_v8086_seg(&sregs.cs, &env->segs[R_CS]); set_v8086_seg(&sregs.ds, &env->segs[R_DS]); set_v8086_seg(&sregs.es, &env->segs[R_ES]); set_v8086_seg(&sregs.fs, &env->segs[R_FS]); set_v8086_seg(&sregs.gs, &env->segs[R_GS]); set_v8086_seg(&sregs.ss, &env->segs[R_SS]); } else { set_seg(&sregs.cs, &env->segs[R_CS]); set_seg(&sregs.ds, &env->segs[R_DS]); set_seg(&sregs.es, &env->segs[R_ES]); set_seg(&sregs.fs, &env->segs[R_FS]); set_seg(&sregs.gs, &env->segs[R_GS]); set_seg(&sregs.ss, &env->segs[R_SS]); if (env->cr[0] & CR0_PE_MASK) { /* force ss cpl to cs cpl */ sregs.ss.selector = (sregs.ss.selector & ~3) | (sregs.cs.selector & 3); sregs.ss.dpl = sregs.ss.selector & 3; } } set_seg(&sregs.tr, &env->tr); set_seg(&sregs.ldt, &env->ldt); sregs.idt.limit = env->idt.limit; sregs.idt.base = env->idt.base; sregs.gdt.limit = env->gdt.limit; sregs.gdt.base = env->gdt.base; sregs.cr0 = env->cr[0]; sregs.cr2 = env->cr[2]; sregs.cr3 = env->cr[3]; sregs.cr4 = env->cr[4]; sregs.cr8 = cpu_get_apic_tpr(env); sregs.apic_base = cpu_get_apic_base(env); sregs.efer = env->efer; kvm_set_sregs(env, &sregs); /* msrs */ n = 0; /* Remember to increase msrs size if you add new registers below */ kvm_msr_entry_set(&msrs[n++], MSR_IA32_SYSENTER_CS, env->sysenter_cs); kvm_msr_entry_set(&msrs[n++], MSR_IA32_SYSENTER_ESP, env->sysenter_esp); kvm_msr_entry_set(&msrs[n++], MSR_IA32_SYSENTER_EIP, env->sysenter_eip); if (kvm_has_msr_star) kvm_msr_entry_set(&msrs[n++], MSR_STAR, env->star); if (kvm_has_vm_hsave_pa) kvm_msr_entry_set(&msrs[n++], MSR_VM_HSAVE_PA, env->vm_hsave); #ifdef TARGET_X86_64 if (lm_capable_kernel) { kvm_msr_entry_set(&msrs[n++], MSR_CSTAR, env->cstar); kvm_msr_entry_set(&msrs[n++], MSR_KERNELGSBASE, env->kernelgsbase); kvm_msr_entry_set(&msrs[n++], MSR_FMASK, env->fmask); kvm_msr_entry_set(&msrs[n++], MSR_LSTAR , env->lstar); } #endif if (level == KVM_PUT_FULL_STATE) { /* * KVM is yet unable to synchronize TSC values of multiple VCPUs on * writeback. Until this is fixed, we only write the offset to SMP * guests after migration, desynchronizing the VCPUs, but avoiding * huge jump-backs that would occur without any writeback at all. */ if (smp_cpus == 1 || env->tsc != 0) { kvm_msr_entry_set(&msrs[n++], MSR_IA32_TSC, env->tsc); } kvm_msr_entry_set(&msrs[n++], MSR_KVM_SYSTEM_TIME, env->system_time_msr); kvm_msr_entry_set(&msrs[n++], MSR_KVM_WALL_CLOCK, env->wall_clock_msr); } #ifdef KVM_CAP_MCE if (env->mcg_cap) { if (level == KVM_PUT_RESET_STATE) kvm_msr_entry_set(&msrs[n++], MSR_MCG_STATUS, env->mcg_status); else if (level == KVM_PUT_FULL_STATE) { kvm_msr_entry_set(&msrs[n++], MSR_MCG_STATUS, env->mcg_status); kvm_msr_entry_set(&msrs[n++], MSR_MCG_CTL, env->mcg_ctl); for (i = 0; i < (env->mcg_cap & 0xff); i++) kvm_msr_entry_set(&msrs[n++], MSR_MC0_CTL + i, env->mce_banks[i]); } } #endif rc = kvm_set_msrs(env, msrs, n); if (rc == -1) perror("kvm_set_msrs FAILED"); if (level >= KVM_PUT_RESET_STATE) { kvm_arch_load_mpstate(env); kvm_load_lapic(env); } if (level == KVM_PUT_FULL_STATE) { if (env->kvm_vcpu_update_vapic) kvm_tpr_enable_vapic(env); } if (kvm_irqchip_in_kernel()) { /* Avoid deadlock: no user space IRQ will ever clear it. */ env->halted = 0; } kvm_put_vcpu_events(env, level); kvm_put_debugregs(env); /* must be last */ kvm_guest_debug_workarounds(env); } void kvm_arch_save_regs(CPUState *env) { struct kvm_regs regs; struct kvm_fpu fpu; struct kvm_sregs sregs; struct kvm_msr_entry msrs[100]; uint32_t hflags; uint32_t i, n, rc, bit; assert(kvm_cpu_is_stopped(env) || env->thread_id == kvm_get_thread_id()); kvm_get_regs(env, ®s); env->regs[R_EAX] = regs.rax; env->regs[R_EBX] = regs.rbx; env->regs[R_ECX] = regs.rcx; env->regs[R_EDX] = regs.rdx; env->regs[R_ESI] = regs.rsi; env->regs[R_EDI] = regs.rdi; env->regs[R_ESP] = regs.rsp; env->regs[R_EBP] = regs.rbp; #ifdef TARGET_X86_64 env->regs[8] = regs.r8; env->regs[9] = regs.r9; env->regs[10] = regs.r10; env->regs[11] = regs.r11; env->regs[12] = regs.r12; env->regs[13] = regs.r13; env->regs[14] = regs.r14; env->regs[15] = regs.r15; #endif env->eflags = regs.rflags; env->eip = regs.rip; kvm_get_fpu(env, &fpu); env->fpstt = (fpu.fsw >> 11) & 7; env->fpus = fpu.fsw; env->fpuc = fpu.fcw; for (i = 0; i < 8; ++i) env->fptags[i] = !((fpu.ftwx >> i) & 1); memcpy(env->fpregs, fpu.fpr, sizeof env->fpregs); memcpy(env->xmm_regs, fpu.xmm, sizeof env->xmm_regs); env->mxcsr = fpu.mxcsr; kvm_get_sregs(env, &sregs); /* There can only be one pending IRQ set in the bitmap at a time, so try to find it and save its number instead (-1 for none). */ env->interrupt_injected = -1; for (i = 0; i < ARRAY_SIZE(sregs.interrupt_bitmap); i++) { if (sregs.interrupt_bitmap[i]) { bit = ctz64(sregs.interrupt_bitmap[i]); env->interrupt_injected = i * 64 + bit; break; } } get_seg(&env->segs[R_CS], &sregs.cs); get_seg(&env->segs[R_DS], &sregs.ds); get_seg(&env->segs[R_ES], &sregs.es); get_seg(&env->segs[R_FS], &sregs.fs); get_seg(&env->segs[R_GS], &sregs.gs); get_seg(&env->segs[R_SS], &sregs.ss); get_seg(&env->tr, &sregs.tr); get_seg(&env->ldt, &sregs.ldt); env->idt.limit = sregs.idt.limit; env->idt.base = sregs.idt.base; env->gdt.limit = sregs.gdt.limit; env->gdt.base = sregs.gdt.base; env->cr[0] = sregs.cr0; env->cr[2] = sregs.cr2; env->cr[3] = sregs.cr3; env->cr[4] = sregs.cr4; cpu_set_apic_base(env, sregs.apic_base); env->efer = sregs.efer; //cpu_set_apic_tpr(env, sregs.cr8); #define HFLAG_COPY_MASK ~( \ HF_CPL_MASK | HF_PE_MASK | HF_MP_MASK | HF_EM_MASK | \ HF_TS_MASK | HF_TF_MASK | HF_VM_MASK | HF_IOPL_MASK | \ HF_OSFXSR_MASK | HF_LMA_MASK | HF_CS32_MASK | \ HF_SS32_MASK | HF_CS64_MASK | HF_ADDSEG_MASK) hflags = (env->segs[R_CS].flags >> DESC_DPL_SHIFT) & HF_CPL_MASK; hflags |= (env->cr[0] & CR0_PE_MASK) << (HF_PE_SHIFT - CR0_PE_SHIFT); hflags |= (env->cr[0] << (HF_MP_SHIFT - CR0_MP_SHIFT)) & (HF_MP_MASK | HF_EM_MASK | HF_TS_MASK); hflags |= (env->eflags & (HF_TF_MASK | HF_VM_MASK | HF_IOPL_MASK)); hflags |= (env->cr[4] & CR4_OSFXSR_MASK) << (HF_OSFXSR_SHIFT - CR4_OSFXSR_SHIFT); if (env->efer & MSR_EFER_LMA) { hflags |= HF_LMA_MASK; } if ((hflags & HF_LMA_MASK) && (env->segs[R_CS].flags & DESC_L_MASK)) { hflags |= HF_CS32_MASK | HF_SS32_MASK | HF_CS64_MASK; } else { hflags |= (env->segs[R_CS].flags & DESC_B_MASK) >> (DESC_B_SHIFT - HF_CS32_SHIFT); hflags |= (env->segs[R_SS].flags & DESC_B_MASK) >> (DESC_B_SHIFT - HF_SS32_SHIFT); if (!(env->cr[0] & CR0_PE_MASK) || (env->eflags & VM_MASK) || !(hflags & HF_CS32_MASK)) { hflags |= HF_ADDSEG_MASK; } else { hflags |= ((env->segs[R_DS].base | env->segs[R_ES].base | env->segs[R_SS].base) != 0) << HF_ADDSEG_SHIFT; } } env->hflags = (env->hflags & HFLAG_COPY_MASK) | hflags; /* msrs */ n = 0; /* Remember to increase msrs size if you add new registers below */ msrs[n++].index = MSR_IA32_SYSENTER_CS; msrs[n++].index = MSR_IA32_SYSENTER_ESP; msrs[n++].index = MSR_IA32_SYSENTER_EIP; if (kvm_has_msr_star) msrs[n++].index = MSR_STAR; msrs[n++].index = MSR_IA32_TSC; if (kvm_has_vm_hsave_pa) msrs[n++].index = MSR_VM_HSAVE_PA; #ifdef TARGET_X86_64 if (lm_capable_kernel) { msrs[n++].index = MSR_CSTAR; msrs[n++].index = MSR_KERNELGSBASE; msrs[n++].index = MSR_FMASK; msrs[n++].index = MSR_LSTAR; } #endif msrs[n++].index = MSR_KVM_SYSTEM_TIME; msrs[n++].index = MSR_KVM_WALL_CLOCK; #ifdef KVM_CAP_MCE if (env->mcg_cap) { msrs[n++].index = MSR_MCG_STATUS; msrs[n++].index = MSR_MCG_CTL; for (i = 0; i < (env->mcg_cap & 0xff) * 4; i++) msrs[n++].index = MSR_MC0_CTL + i; } #endif rc = kvm_get_msrs(env, msrs, n); if (rc == -1) { perror("kvm_get_msrs FAILED"); } else { n = rc; /* actual number of MSRs */ for (i=0 ; iregs[R_EAX] = function; env->regs[R_ECX] = count; qemu_kvm_cpuid_on_env(env); e->function = function; e->flags = 0; e->index = 0; e->eax = env->regs[R_EAX]; e->ebx = env->regs[R_EBX]; e->ecx = env->regs[R_ECX]; e->edx = env->regs[R_EDX]; } struct kvm_para_features { int cap; int feature; } para_features[] = { #ifdef KVM_CAP_CLOCKSOURCE { KVM_CAP_CLOCKSOURCE, KVM_FEATURE_CLOCKSOURCE }, #endif #ifdef KVM_CAP_NOP_IO_DELAY { KVM_CAP_NOP_IO_DELAY, KVM_FEATURE_NOP_IO_DELAY }, #endif #ifdef KVM_CAP_PV_MMU { KVM_CAP_PV_MMU, KVM_FEATURE_MMU_OP }, #endif { -1, -1 } }; static int get_para_features(kvm_context_t kvm_context) { int i, features = 0; for (i = 0; i < ARRAY_SIZE(para_features)-1; i++) { if (kvm_check_extension(kvm_state, para_features[i].cap)) features |= (1 << para_features[i].feature); } return features; } static void kvm_trim_features(uint32_t *features, uint32_t supported) { int i; uint32_t mask; for (i = 0; i < 32; ++i) { mask = 1U << i; if ((*features & mask) && !(supported & mask)) { *features &= ~mask; } } } int kvm_arch_init_vcpu(CPUState *cenv) { struct kvm_cpuid_entry2 cpuid_ent[100]; #ifdef KVM_CPUID_SIGNATURE struct kvm_cpuid_entry2 *pv_ent; uint32_t signature[3]; #endif int cpuid_nent = 0; CPUState copy; uint32_t i, j, limit; kvm_arch_reset_vcpu(cenv); #ifdef KVM_CPUID_SIGNATURE /* Paravirtualization CPUIDs */ memcpy(signature, "KVMKVMKVM\0\0\0", 12); pv_ent = &cpuid_ent[cpuid_nent++]; memset(pv_ent, 0, sizeof(*pv_ent)); pv_ent->function = KVM_CPUID_SIGNATURE; pv_ent->eax = 0; pv_ent->ebx = signature[0]; pv_ent->ecx = signature[1]; pv_ent->edx = signature[2]; pv_ent = &cpuid_ent[cpuid_nent++]; memset(pv_ent, 0, sizeof(*pv_ent)); pv_ent->function = KVM_CPUID_FEATURES; pv_ent->eax = get_para_features(kvm_context); #endif kvm_trim_features(&cenv->cpuid_features, kvm_arch_get_supported_cpuid(cenv, 1, R_EDX)); /* prevent the hypervisor bit from being cleared by the kernel */ i = cenv->cpuid_ext_features & CPUID_EXT_HYPERVISOR; kvm_trim_features(&cenv->cpuid_ext_features, kvm_arch_get_supported_cpuid(cenv, 1, R_ECX)); cenv->cpuid_ext_features |= i; kvm_trim_features(&cenv->cpuid_ext2_features, kvm_arch_get_supported_cpuid(cenv, 0x80000001, R_EDX)); kvm_trim_features(&cenv->cpuid_ext3_features, kvm_arch_get_supported_cpuid(cenv, 0x80000001, R_ECX)); copy = *cenv; copy.regs[R_EAX] = 0; qemu_kvm_cpuid_on_env(©); limit = copy.regs[R_EAX]; for (i = 0; i <= limit; ++i) { if (i == 4 || i == 0xb || i == 0xd) { for (j = 0; ; ++j) { do_cpuid_ent(&cpuid_ent[cpuid_nent], i, j, ©); cpuid_ent[cpuid_nent].flags = KVM_CPUID_FLAG_SIGNIFCANT_INDEX; cpuid_ent[cpuid_nent].index = j; cpuid_nent++; if (i == 4 && copy.regs[R_EAX] == 0) break; if (i == 0xb && !(copy.regs[R_ECX] & 0xff00)) break; if (i == 0xd && copy.regs[R_EAX] == 0) break; } } else do_cpuid_ent(&cpuid_ent[cpuid_nent++], i, 0, ©); } copy.regs[R_EAX] = 0x80000000; qemu_kvm_cpuid_on_env(©); limit = copy.regs[R_EAX]; for (i = 0x80000000; i <= limit; ++i) do_cpuid_ent(&cpuid_ent[cpuid_nent++], i, 0, ©); kvm_setup_cpuid2(cenv, cpuid_nent, cpuid_ent); #ifdef KVM_CAP_MCE if (((cenv->cpuid_version >> 8)&0xF) >= 6 && (cenv->cpuid_features&(CPUID_MCE|CPUID_MCA)) == (CPUID_MCE|CPUID_MCA) && kvm_check_extension(kvm_state, KVM_CAP_MCE) > 0) { uint64_t mcg_cap; int banks; if (kvm_get_mce_cap_supported(kvm_context, &mcg_cap, &banks)) perror("kvm_get_mce_cap_supported FAILED"); else { if (banks > MCE_BANKS_DEF) banks = MCE_BANKS_DEF; mcg_cap &= MCE_CAP_DEF; mcg_cap |= banks; if (kvm_setup_mce(cenv, &mcg_cap)) perror("kvm_setup_mce FAILED"); else cenv->mcg_cap = mcg_cap; } } #endif #ifdef KVM_EXIT_TPR_ACCESS kvm_enable_tpr_access_reporting(cenv); #endif kvm_reset_mpstate(cenv); return 0; } int kvm_arch_halt(CPUState *env) { if (!((env->interrupt_request & CPU_INTERRUPT_HARD) && (env->eflags & IF_MASK)) && !(env->interrupt_request & CPU_INTERRUPT_NMI)) { env->halted = 1; } return 1; } int kvm_arch_pre_run(CPUState *env, struct kvm_run *run) { if (!kvm_irqchip_in_kernel()) kvm_set_cr8(env, cpu_get_apic_tpr(env)); return 0; } int kvm_arch_has_work(CPUState *env) { if (((env->interrupt_request & CPU_INTERRUPT_HARD) && (env->eflags & IF_MASK)) || (env->interrupt_request & CPU_INTERRUPT_NMI)) return 1; return 0; } int kvm_arch_try_push_interrupts(void *opaque) { CPUState *env = cpu_single_env; int r, irq; if (kvm_is_ready_for_interrupt_injection(env) && (env->interrupt_request & CPU_INTERRUPT_HARD) && (env->eflags & IF_MASK)) { env->interrupt_request &= ~CPU_INTERRUPT_HARD; irq = cpu_get_pic_interrupt(env); if (irq >= 0) { r = kvm_inject_irq(env, irq); if (r < 0) printf("cpu %d fail inject %x\n", env->cpu_index, irq); } } return (env->interrupt_request & CPU_INTERRUPT_HARD) != 0; } #ifdef KVM_CAP_USER_NMI void kvm_arch_push_nmi(void *opaque) { CPUState *env = cpu_single_env; int r; if (likely(!(env->interrupt_request & CPU_INTERRUPT_NMI))) return; env->interrupt_request &= ~CPU_INTERRUPT_NMI; r = kvm_inject_nmi(env); if (r < 0) printf("cpu %d fail inject NMI\n", env->cpu_index); } #endif /* KVM_CAP_USER_NMI */ void kvm_arch_cpu_reset(CPUState *env) { kvm_arch_reset_vcpu(env); kvm_reset_mpstate(env); } #ifdef CONFIG_KVM_DEVICE_ASSIGNMENT void kvm_arch_do_ioperm(void *_data) { struct ioperm_data *data = _data; ioperm(data->start_port, data->num, data->turn_on); } #endif /* * Setup x86 specific IRQ routing */ int kvm_arch_init_irq_routing(void) { int i, r; if (kvm_irqchip && kvm_has_gsi_routing(kvm_context)) { kvm_clear_gsi_routes(kvm_context); for (i = 0; i < 8; ++i) { if (i == 2) continue; r = kvm_add_irq_route(kvm_context, i, KVM_IRQCHIP_PIC_MASTER, i); if (r < 0) return r; } for (i = 8; i < 16; ++i) { r = kvm_add_irq_route(kvm_context, i, KVM_IRQCHIP_PIC_SLAVE, i - 8); if (r < 0) return r; } for (i = 0; i < 24; ++i) { if (i == 0) { r = kvm_add_irq_route(kvm_context, i, KVM_IRQCHIP_IOAPIC, 2); } else if (i != 2) { r = kvm_add_irq_route(kvm_context, i, KVM_IRQCHIP_IOAPIC, i); } if (r < 0) return r; } kvm_commit_irq_routes(kvm_context); } return 0; } void kvm_arch_process_irqchip_events(CPUState *env) { if (env->interrupt_request & CPU_INTERRUPT_INIT) { kvm_cpu_synchronize_state(env); do_cpu_init(env); } if (env->interrupt_request & CPU_INTERRUPT_SIPI) { kvm_cpu_synchronize_state(env); do_cpu_sipi(env); } }