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path: root/arch/x86/kvm/cpuid.c
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Diffstat (limited to 'arch/x86/kvm/cpuid.c')
-rw-r--r--arch/x86/kvm/cpuid.c12
1 files changed, 11 insertions, 1 deletions
diff --git a/arch/x86/kvm/cpuid.c b/arch/x86/kvm/cpuid.c
index ead681210306..22c2720cd948 100644
--- a/arch/x86/kvm/cpuid.c
+++ b/arch/x86/kvm/cpuid.c
@@ -368,9 +368,13 @@ static inline void do_cpuid_7_mask(struct kvm_cpuid_entry2 *entry, int index)
F(SPEC_CTRL_SSBD) | F(ARCH_CAPABILITIES) | F(INTEL_STIBP) |
F(MD_CLEAR);
+ /* cpuid 7.1.eax */
+ const u32 kvm_cpuid_7_1_eax_x86_features =
+ F(AVX512_BF16);
+
switch (index) {
case 0:
- entry->eax = 0;
+ entry->eax = min(entry->eax, 1u);
entry->ebx &= kvm_cpuid_7_0_ebx_x86_features;
cpuid_mask(&entry->ebx, CPUID_7_0_EBX);
/* TSC_ADJUST is emulated */
@@ -394,6 +398,12 @@ static inline void do_cpuid_7_mask(struct kvm_cpuid_entry2 *entry, int index)
*/
entry->edx |= F(ARCH_CAPABILITIES);
break;
+ case 1:
+ entry->eax &= kvm_cpuid_7_1_eax_x86_features;
+ entry->ebx = 0;
+ entry->ecx = 0;
+ entry->edx = 0;
+ break;
default:
WARN_ON_ONCE(1);
entry->eax = 0;