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| author | Chao Peng <chao.p.peng@linux.intel.com> | 2014-10-22 17:35:24 +0800 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2014-11-03 12:07:30 +0100 |
| commit | 612263b30c900b534fa76609d314ed55c255a94e (patch) | |
| tree | 1606193c7c9f6939c8f291a5b41edcb2e79e5540 /arch/x86/kvm/x86.c | |
| parent | 7f05db6a20fe4d85bada20d365c78029831b9de1 (diff) | |
| download | lwn-612263b30c900b534fa76609d314ed55c255a94e.tar.gz lwn-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/kvm/x86.c')
| -rw-r--r-- | arch/x86/kvm/x86.c | 6 |
1 files changed, 6 insertions, 0 deletions
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; |