KVM: x86: Remove supports_cpuid_fault() helper

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>

diff --git a/arch/x86/kvm/cpuid.h b/arch/x86/kvm/cpuid.h
index bc4a8428b836d09f82534e7ceee3d146addf20b4..95d09ccbf951409e463b7f37831dde81b468b459 100644 (file)
--- a/arch/x86/kvm/cpuid.h
+++ b/arch/x86/kvm/cpuid.h
@@ -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 &

diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 2bad3fa987dfc01f6a1beb1453e2849357f94f8e..d8e6877a7a434780c2ea8c781a568165704f7255 100644 (file)
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -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;