From 6c3f6041172b78d5532c6bf3680d304e92ec2e66 Mon Sep 17 00:00:00 2001 From: Sheng Yang Date: Tue, 22 Jun 2010 13:49:21 +0800 Subject: [PATCH] KVM: x86: Enable AVX for guest Enable Intel(R) Advanced Vector Extension(AVX) for guest. The detection of AVX feature includes OSXSAVE bit testing. When OSXSAVE bit is not set, even if AVX is supported, the AVX instruction would result in UD as well. So we're safe to expose AVX bits to guest directly. Signed-off-by: Sheng Yang Signed-off-by: Avi Kivity --- arch/x86/kvm/x86.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c index 68be38e233f5..d39d6b25d3e5 100644 --- a/arch/x86/kvm/x86.c +++ b/arch/x86/kvm/x86.c @@ -1963,13 +1963,13 @@ static void do_cpuid_ent(struct kvm_cpuid_entry2 *entry, u32 function, 0 /* Reserved */ | f_lm | F(3DNOWEXT) | F(3DNOW); /* cpuid 1.ecx */ const u32 kvm_supported_word4_x86_features = - F(XMM3) | 0 /* Reserved, DTES64, MONITOR */ | + F(XMM3) | F(PCLMULQDQ) | 0 /* DTES64, MONITOR */ | 0 /* DS-CPL, VMX, SMX, EST */ | 0 /* TM2 */ | F(SSSE3) | 0 /* CNXT-ID */ | 0 /* Reserved */ | 0 /* Reserved */ | F(CX16) | 0 /* xTPR Update, PDCM */ | 0 /* Reserved, DCA */ | F(XMM4_1) | F(XMM4_2) | F(X2APIC) | F(MOVBE) | F(POPCNT) | - 0 /* Reserved, AES */ | F(XSAVE) | 0 /* OSXSAVE */; + 0 /* Reserved, AES */ | F(XSAVE) | 0 /* OSXSAVE */ | F(AVX); /* cpuid 0x80000001.ecx */ const u32 kvm_supported_word6_x86_features = F(LAHF_LM) | F(CMP_LEGACY) | F(SVM) | 0 /* ExtApicSpace */ | -- 2.34.1