diff options
| -rw-r--r-- | arch/x86/hyperv/hv_init.c | 8 | ||||
| -rw-r--r-- | arch/x86/hyperv/ivm.c | 17 | ||||
| -rw-r--r-- | arch/x86/include/asm/mshyperv.h | 14 | ||||
| -rw-r--r-- | drivers/hv/hv_common.c | 10 | ||||
| -rw-r--r-- | include/asm-generic/mshyperv.h | 1 |
5 files changed, 48 insertions, 2 deletions
diff --git a/arch/x86/hyperv/hv_init.c b/arch/x86/hyperv/hv_init.c index bcfbcda8b050..255e02ec467e 100644 --- a/arch/x86/hyperv/hv_init.c +++ b/arch/x86/hyperv/hv_init.c @@ -476,6 +476,10 @@ void __init hyperv_init(void) /* Hyper-V requires to write guest os id via ghcb in SNP IVM. */ hv_ghcb_msr_write(HV_X64_MSR_GUEST_OS_ID, guest_id); + /* A TDX guest uses the GHCI call rather than hv_hypercall_pg. */ + if (hv_isolation_type_tdx()) + goto skip_hypercall_pg_init; + hv_hypercall_pg = __vmalloc_node_range(PAGE_SIZE, 1, VMALLOC_START, VMALLOC_END, GFP_KERNEL, PAGE_KERNEL_ROX, VM_FLUSH_RESET_PERMS, NUMA_NO_NODE, @@ -515,6 +519,7 @@ void __init hyperv_init(void) wrmsrl(HV_X64_MSR_HYPERCALL, hypercall_msr.as_uint64); } +skip_hypercall_pg_init: /* * hyperv_init() is called before LAPIC is initialized: see * apic_intr_mode_init() -> x86_platform.apic_post_init() and @@ -642,6 +647,9 @@ bool hv_is_hyperv_initialized(void) if (x86_hyper_type != X86_HYPER_MS_HYPERV) return false; + /* A TDX guest uses the GHCI call rather than hv_hypercall_pg. */ + if (hv_isolation_type_tdx()) + return true; /* * Verify that earlier initialization succeeded by checking * that the hypercall page is setup diff --git a/arch/x86/hyperv/ivm.c b/arch/x86/hyperv/ivm.c index afdae1a8a117..6c7598d9e68a 100644 --- a/arch/x86/hyperv/ivm.c +++ b/arch/x86/hyperv/ivm.c @@ -571,3 +571,20 @@ bool hv_isolation_type_tdx(void) { return static_branch_unlikely(&isolation_type_tdx); } + +#ifdef CONFIG_INTEL_TDX_GUEST + +u64 hv_tdx_hypercall(u64 control, u64 param1, u64 param2) +{ + struct tdx_hypercall_args args = { }; + + args.r10 = control; + args.rdx = param1; + args.r8 = param2; + + (void)__tdx_hypercall_ret(&args); + + return args.r11; +} + +#endif diff --git a/arch/x86/include/asm/mshyperv.h b/arch/x86/include/asm/mshyperv.h index 3feb4e36851e..6a9e00c4730b 100644 --- a/arch/x86/include/asm/mshyperv.h +++ b/arch/x86/include/asm/mshyperv.h @@ -51,6 +51,7 @@ extern union hv_ghcb * __percpu *hv_ghcb_pg; extern bool hv_isolation_type_en_snp(void); bool hv_isolation_type_tdx(void); +u64 hv_tdx_hypercall(u64 control, u64 param1, u64 param2); /* * DEFAULT INIT GPAT and SEGMENT LIMIT value in struct VMSA @@ -63,6 +64,10 @@ int hv_call_deposit_pages(int node, u64 partition_id, u32 num_pages); int hv_call_add_logical_proc(int node, u32 lp_index, u32 acpi_id); int hv_call_create_vp(int node, u64 partition_id, u32 vp_index, u32 flags); +/* + * If the hypercall involves no input or output parameters, the hypervisor + * ignores the corresponding GPA pointer. + */ static inline u64 hv_do_hypercall(u64 control, void *input, void *output) { u64 input_address = input ? virt_to_phys(input) : 0; @@ -70,6 +75,9 @@ static inline u64 hv_do_hypercall(u64 control, void *input, void *output) u64 hv_status; #ifdef CONFIG_X86_64 + if (hv_isolation_type_tdx()) + return hv_tdx_hypercall(control, input_address, output_address); + if (hv_isolation_type_en_snp()) { __asm__ __volatile__("mov %4, %%r8\n" "vmmcall" @@ -123,6 +131,9 @@ static inline u64 _hv_do_fast_hypercall8(u64 control, u64 input1) u64 hv_status; #ifdef CONFIG_X86_64 + if (hv_isolation_type_tdx()) + return hv_tdx_hypercall(control, input1, 0); + if (hv_isolation_type_en_snp()) { __asm__ __volatile__( "vmmcall" @@ -174,6 +185,9 @@ static inline u64 _hv_do_fast_hypercall16(u64 control, u64 input1, u64 input2) u64 hv_status; #ifdef CONFIG_X86_64 + if (hv_isolation_type_tdx()) + return hv_tdx_hypercall(control, input1, input2); + if (hv_isolation_type_en_snp()) { __asm__ __volatile__("mov %4, %%r8\n" "vmmcall" diff --git a/drivers/hv/hv_common.c b/drivers/hv/hv_common.c index da3307533f4d..897bbb96f411 100644 --- a/drivers/hv/hv_common.c +++ b/drivers/hv/hv_common.c @@ -381,10 +381,10 @@ int hv_common_cpu_init(unsigned int cpu) *outputarg = (char *)(*inputarg) + HV_HYP_PAGE_SIZE; } - if (hv_isolation_type_en_snp()) { + if (hv_isolation_type_en_snp() || hv_isolation_type_tdx()) { ret = set_memory_decrypted((unsigned long)*inputarg, pgcount); if (ret) { - kfree(*inputarg); + /* It may be unsafe to free *inputarg */ *inputarg = NULL; return ret; } @@ -567,3 +567,9 @@ u64 __weak hv_ghcb_hypercall(u64 control, void *input, void *output, u32 input_s return HV_STATUS_INVALID_PARAMETER; } EXPORT_SYMBOL_GPL(hv_ghcb_hypercall); + +u64 __weak hv_tdx_hypercall(u64 control, u64 param1, u64 param2) +{ + return HV_STATUS_INVALID_PARAMETER; +} +EXPORT_SYMBOL_GPL(hv_tdx_hypercall); diff --git a/include/asm-generic/mshyperv.h b/include/asm-generic/mshyperv.h index 82eba2d5fc4c..f577eff58ea0 100644 --- a/include/asm-generic/mshyperv.h +++ b/include/asm-generic/mshyperv.h @@ -283,6 +283,7 @@ enum hv_isolation_type hv_get_isolation_type(void); bool hv_is_isolation_supported(void); bool hv_isolation_type_snp(void); u64 hv_ghcb_hypercall(u64 control, void *input, void *output, u32 input_size); +u64 hv_tdx_hypercall(u64 control, u64 param1, u64 param2); void hyperv_cleanup(void); bool hv_query_ext_cap(u64 cap_query); void hv_setup_dma_ops(struct device *dev, bool coherent); |