[PATCH 6.18.y v2 4/6] KVM: x86: Remove supports_cpuid_fault() helper

[Anil Altinay <aaltinay@google.com>]

From: Jim Mattson <jmattson@google.com>

commit d1bc99885a59d89e408f52f4c147b07bca9a686f upstream.

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>
Signed-off-by: Anil Altinay <aaltinay@google.com>
---
 arch/x86/kvm/cpuid.h | 5 -----
 arch/x86/kvm/x86.c   | 2 +-
 2 files changed, 1 insertion(+), 6 deletions(-)

diff --git a/arch/x86/kvm/cpuid.h b/arch/x86/kvm/cpuid.h
index c5399ab7e5ae..872bc99c55ed 100644
--- a/arch/x86/kvm/cpuid.h
+++ b/arch/x86/kvm/cpuid.h
@@ -175,11 +175,6 @@ 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 6f76290e79c9..a91599e5d8db 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -3913,7 +3913,7 @@ 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;
-- 
2.56.0.385.gd3acb90ef8-goog