diff options
| author | Chao Peng | 2014-10-22 11:35:24 +0200 |
|---|---|---|
| committer | Paolo Bonzini | 2014-11-03 12:07:30 +0100 |
| commit | 612263b30c900b534fa76609d314ed55c255a94e (patch) | |
| tree | 1606193c7c9f6939c8f291a5b41edcb2e79e5540 /arch/x86 | |
| parent | kvm: drop unsupported capabilities, fix documentation (diff) | |
| download | kernel-qcow2-linux-612263b30c900b534fa76609d314ed55c255a94e.tar.gz kernel-qcow2-linux-612263b30c900b534fa76609d314ed55c255a94e.tar.xz kernel-qcow2-linux-612263b30c900b534fa76609d314ed55c255a94e.zip | |
KVM: x86: Enable Intel AVX-512 for guest
Expose Intel AVX-512 feature bits to guest. Also add checks for
xcr0 AVX512 related bits according to spec:
http://download-software.intel.com/sites/default/files/managed/71/2e/319433-017.pdf
Signed-off-by: Chao Peng <chao.p.peng@linux.intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86')
| -rw-r--r-- | arch/x86/include/asm/xsave.h | 1 | ||||
| -rw-r--r-- | arch/x86/kvm/cpuid.c | 3 | ||||
| -rw-r--r-- | arch/x86/kvm/x86.c | 6 | ||||
| -rw-r--r-- | arch/x86/kvm/x86.h | 3 |
4 files changed, 11 insertions, 2 deletions
diff --git a/arch/x86/include/asm/xsave.h b/arch/x86/include/asm/xsave.h index 7e7a79ada658..5fa9770035dc 100644 --- a/arch/x86/include/asm/xsave.h +++ b/arch/x86/include/asm/xsave.h @@ -16,6 +16,7 @@ #define XSTATE_Hi16_ZMM 0x80 #define XSTATE_FPSSE (XSTATE_FP | XSTATE_SSE) +#define XSTATE_AVX512 (XSTATE_OPMASK | XSTATE_ZMM_Hi256 | XSTATE_Hi16_ZMM) /* Bit 63 of XCR0 is reserved for future expansion */ #define XSTATE_EXTEND_MASK (~(XSTATE_FPSSE | (1ULL << 63))) diff --git a/arch/x86/kvm/cpuid.c b/arch/x86/kvm/cpuid.c index 976e3a57f9ea..20d83217fb1d 100644 --- a/arch/x86/kvm/cpuid.c +++ b/arch/x86/kvm/cpuid.c @@ -317,7 +317,8 @@ static inline int __do_cpuid_ent(struct kvm_cpuid_entry2 *entry, u32 function, const u32 kvm_supported_word9_x86_features = F(FSGSBASE) | F(BMI1) | F(HLE) | F(AVX2) | F(SMEP) | F(BMI2) | F(ERMS) | f_invpcid | F(RTM) | f_mpx | F(RDSEED) | - F(ADX) | F(SMAP); + F(ADX) | F(SMAP) | F(AVX512F) | F(AVX512PF) | F(AVX512ER) | + F(AVX512CD); /* all calls to cpuid_count() should be made on the same cpu */ get_cpu(); diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index 7a9cb56407bd..14c49cf3f77f 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -666,6 +666,12 @@ int __kvm_set_xcr(struct kvm_vcpu *vcpu, u32 index, u64 xcr) if ((!(xcr0 & XSTATE_BNDREGS)) != (!(xcr0 & XSTATE_BNDCSR))) return 1; + if (xcr0 & XSTATE_AVX512) { + if (!(xcr0 & XSTATE_YMM)) + return 1; + if ((xcr0 & XSTATE_AVX512) != XSTATE_AVX512) + return 1; + } kvm_put_guest_xcr0(vcpu); vcpu->arch.xcr0 = xcr0; diff --git a/arch/x86/kvm/x86.h b/arch/x86/kvm/x86.h index 7cb9c45a5fe0..cc1d61af6140 100644 --- a/arch/x86/kvm/x86.h +++ b/arch/x86/kvm/x86.h @@ -162,7 +162,8 @@ int kvm_write_guest_virt_system(struct x86_emulate_ctxt *ctxt, bool kvm_mtrr_valid(struct kvm_vcpu *vcpu, u32 msr, u64 data); #define KVM_SUPPORTED_XCR0 (XSTATE_FP | XSTATE_SSE | XSTATE_YMM \ - | XSTATE_BNDREGS | XSTATE_BNDCSR) + | XSTATE_BNDREGS | XSTATE_BNDCSR \ + | XSTATE_AVX512) extern u64 host_xcr0; extern u64 kvm_supported_xcr0(void); |