Now that kvm_cpu_cap_init() is a macro with its own scope, add EMUL_F() to OR-in features that KVM emulates in software, i.e. that don't depend on the feature being available in hardware. The contained scope of kvm_cpu_cap_init() allows using a local variable to track the set of emulated leaves, which in addition to avoiding confusing and/or unnecessary variables, helps prevent misuse of EMUL_F(). Signed-off-by: Sean Christopherson <seanjc@xxxxxxxxxx> --- arch/x86/kvm/cpuid.c | 36 +++++++++++++++++++++--------------- 1 file changed, 21 insertions(+), 15 deletions(-) diff --git a/arch/x86/kvm/cpuid.c b/arch/x86/kvm/cpuid.c index 1064e4d68718..33e3e77de1b7 100644 --- a/arch/x86/kvm/cpuid.c +++ b/arch/x86/kvm/cpuid.c @@ -94,6 +94,16 @@ u32 xstate_required_size(u64 xstate_bv, bool compacted) F(name); \ }) +/* + * Emulated Feature - For features that KVM emulates in software irrespective + * of host CPU/kernel support. + */ +#define EMUL_F(name) \ +({ \ + kvm_cpu_cap_emulated |= F(name); \ + F(name); \ +}) + /* * Aliased Features - For features in 0x8000_0001.EDX that are duplicates of * identical 0x1.EDX features, and thus are aliased from 0x1 to 0x8000_0001. @@ -649,6 +659,7 @@ do { \ do { \ const struct cpuid_reg cpuid = x86_feature_cpuid(leaf * 32); \ const u32 __maybe_unused kvm_cpu_cap_init_in_progress = leaf; \ + u32 kvm_cpu_cap_emulated = 0; \ \ if (leaf < NCAPINTS) \ kvm_cpu_caps[leaf] &= (mask); \ @@ -656,6 +667,7 @@ do { \ kvm_cpu_caps[leaf] = (mask); \ \ kvm_cpu_caps[leaf] &= raw_cpuid_get(cpuid); \ + kvm_cpu_caps[leaf] |= kvm_cpu_cap_emulated; \ } while (0) /* @@ -684,12 +696,10 @@ void kvm_set_cpu_caps(void) 0 /* TM2 */ | F(SSSE3) | 0 /* CNXT-ID */ | 0 /* Reserved */ | F(FMA) | F(CX16) | 0 /* xTPR Update */ | F(PDCM) | F(PCID) | 0 /* Reserved, DCA */ | F(XMM4_1) | - F(XMM4_2) | F(X2APIC) | F(MOVBE) | F(POPCNT) | + F(XMM4_2) | EMUL_F(X2APIC) | F(MOVBE) | F(POPCNT) | 0 /* Reserved*/ | F(AES) | F(XSAVE) | 0 /* OSXSAVE */ | F(AVX) | F(F16C) | F(RDRAND) ); - /* KVM emulates x2apic in software irrespective of host support. */ - kvm_cpu_cap_set(X86_FEATURE_X2APIC); kvm_cpu_cap_init(CPUID_1_EDX, F(FPU) | F(VME) | F(DE) | F(PSE) | @@ -703,13 +713,13 @@ void kvm_set_cpu_caps(void) ); kvm_cpu_cap_init(CPUID_7_0_EBX, - F(FSGSBASE) | F(SGX) | F(BMI1) | F(HLE) | F(AVX2) | - F(FDP_EXCPTN_ONLY) | F(SMEP) | F(BMI2) | F(ERMS) | F(INVPCID) | - F(RTM) | F(ZERO_FCS_FDS) | 0 /*MPX*/ | F(AVX512F) | - F(AVX512DQ) | F(RDSEED) | F(ADX) | F(SMAP) | F(AVX512IFMA) | - F(CLFLUSHOPT) | F(CLWB) | 0 /*INTEL_PT*/ | F(AVX512PF) | - F(AVX512ER) | F(AVX512CD) | F(SHA_NI) | F(AVX512BW) | - F(AVX512VL)); + F(FSGSBASE) | EMUL_F(TSC_ADJUST) | F(SGX) | F(BMI1) | F(HLE) | + F(AVX2) | F(FDP_EXCPTN_ONLY) | F(SMEP) | F(BMI2) | F(ERMS) | + F(INVPCID) | F(RTM) | F(ZERO_FCS_FDS) | 0 /*MPX*/ | + F(AVX512F) | F(AVX512DQ) | F(RDSEED) | F(ADX) | F(SMAP) | + F(AVX512IFMA) | F(CLFLUSHOPT) | F(CLWB) | 0 /*INTEL_PT*/ | + F(AVX512PF) | F(AVX512ER) | F(AVX512CD) | F(SHA_NI) | + F(AVX512BW) | F(AVX512VL)); kvm_cpu_cap_init(CPUID_7_ECX, F(AVX512VBMI) | RAW_F(LA57) | F(PKU) | 0 /*OSPKE*/ | F(RDPID) | @@ -728,16 +738,12 @@ void kvm_set_cpu_caps(void) kvm_cpu_cap_init(CPUID_7_EDX, F(AVX512_4VNNIW) | F(AVX512_4FMAPS) | F(SPEC_CTRL) | - F(SPEC_CTRL_SSBD) | F(ARCH_CAPABILITIES) | F(INTEL_STIBP) | + F(SPEC_CTRL_SSBD) | EMUL_F(ARCH_CAPABILITIES) | F(INTEL_STIBP) | F(MD_CLEAR) | F(AVX512_VP2INTERSECT) | F(FSRM) | F(SERIALIZE) | F(TSXLDTRK) | F(AVX512_FP16) | F(AMX_TILE) | F(AMX_INT8) | F(AMX_BF16) | F(FLUSH_L1D) ); - /* TSC_ADJUST and ARCH_CAPABILITIES are emulated in software. */ - kvm_cpu_cap_set(X86_FEATURE_TSC_ADJUST); - kvm_cpu_cap_set(X86_FEATURE_ARCH_CAPABILITIES); - if (boot_cpu_has(X86_FEATURE_IBPB) && boot_cpu_has(X86_FEATURE_IBRS)) kvm_cpu_cap_set(X86_FEATURE_SPEC_CTRL); if (boot_cpu_has(X86_FEATURE_STIBP)) -- 2.45.0.215.g3402c0e53f-goog