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KVM: x86: Enable Intel AVX-512 for guest

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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>
This commit is contained in:
Chao Peng
2014-10-22 17:35:24 +08:00
committed by Paolo Bonzini
parent 7f05db6a20
commit 612263b30c
4 changed files with 11 additions and 2 deletions
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6
arch/x86/kvm/x86.c
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@@ -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;