KVM: x86: Add CPUID support for new instruction WBNOINVD

Signed-off-by: Robert Hoo <robert.hu@linux.intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

diff --git a/arch/x86/include/asm/cpufeatures.h b/arch/x86/include/asm/cpufeatures.h
index 28c4a502b4197cce9ae968deb8ea2fe7797e8da4..39a48f06d39d0477704cc2361c238c7108bfa2cc 100644 (file)
--- a/arch/x86/include/asm/cpufeatures.h
+++ b/arch/x86/include/asm/cpufeatures.h
@@ -281,6 +281,7 @@
 #define X86_FEATURE_CLZERO             (13*32+ 0) /* CLZERO instruction */
 #define X86_FEATURE_IRPERF             (13*32+ 1) /* Instructions Retired Count */
 #define X86_FEATURE_XSAVEERPTR         (13*32+ 2) /* Always save/restore FP error pointers */
+#define X86_FEATURE_WBNOINVD           (13*32+ 9) /* WBNOINVD instruction */
 #define X86_FEATURE_AMD_IBPB           (13*32+12) /* "" Indirect Branch Prediction Barrier */
 #define X86_FEATURE_AMD_IBRS           (13*32+14) /* "" Indirect Branch Restricted Speculation */
 #define X86_FEATURE_AMD_STIBP          (13*32+15) /* "" Single Thread Indirect Branch Predictors */

diff --git a/arch/x86/kvm/cpuid.c b/arch/x86/kvm/cpuid.c
index c731e87baef580ec5776bf67161d9e894ea1dbc2..bbffa6c54697acc95c8da1cdc939e0f0a490bbcf 100644 (file)
--- a/arch/x86/kvm/cpuid.c
+++ b/arch/x86/kvm/cpuid.c
@@ -378,7 +378,7 @@ static inline int __do_cpuid_ent(struct kvm_cpuid_entry2 *entry, u32 function,
 
        /* cpuid 0x80000008.ebx */
        const u32 kvm_cpuid_8000_0008_ebx_x86_features =
-               F(AMD_IBPB) | F(AMD_IBRS) | F(AMD_SSBD) | F(VIRT_SSBD) |
+               F(WBNOINVD) | F(AMD_IBPB) | F(AMD_IBRS) | F(AMD_SSBD) | F(VIRT_SSBD) |
                F(AMD_SSB_NO) | F(AMD_STIBP);
 
        /* cpuid 0xC0000001.edx */