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KVM: x86: Remove supports_cpuid_fault() helper

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The function, supports_cpuid_fault(), tests specifically for guest support
of Intel's CPUID faulting feature. It does not test for guest support of
AMD's CPUID faulting feature.

To avoid confusion, remove the helper.

Suggested-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: Jim Mattson <jmattson@google.com>
Reviewed-by: Binbin Wu <binbin.wu@linux.intel.com>
Link: https://patch.msgid.link/20260527174347.2356165-4-jmattson@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>
This commit is contained in:
Jim Mattson 2026-05-27 10:43:45 -07:00 committed by Sean Christopherson
parent be7fd7c3e8
commit d1bc99885a
2 changed files with 1 additions and 6 deletions
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5
arch/x86/kvm/cpuid.h
View File

@ -183,11 +183,6 @@ static inline int guest_cpuid_stepping(struct kvm_vcpu *vcpu)
return x86_stepping(best->eax);
}
static inline bool supports_cpuid_fault(struct kvm_vcpu *vcpu)
{
return vcpu->arch.msr_platform_info & MSR_PLATFORM_INFO_CPUID_FAULT;
}
static inline bool cpuid_fault_enabled(struct kvm_vcpu *vcpu)
{
return vcpu->arch.msr_misc_features_enables &

2
arch/x86/kvm/x86.c
View File

@ -4264,7 +4264,7 @@ int kvm_set_msr_common(struct kvm_vcpu *vcpu, struct msr_data *msr_info)
case MSR_MISC_FEATURES_ENABLES:
if (data & ~MSR_MISC_FEATURES_ENABLES_CPUID_FAULT ||
(data & MSR_MISC_FEATURES_ENABLES_CPUID_FAULT &&
!supports_cpuid_fault(vcpu)))
!(vcpu->arch.msr_platform_info & MSR_PLATFORM_INFO_CPUID_FAULT)))
return 1;
vcpu->arch.msr_misc_features_enables = data;
break;