KVM: x86: Drop unnecessary check that cpuid_entry2_find() returns right leaf

Drop an unnecessary check that kvm_find_cpuid_entry_index(), i.e.
cpuid_entry2_find(), returns the correct leaf when getting CPUID.0x7.0x0
to update X86_FEATURE_OSPKE.  cpuid_entry2_find() never returns an entry
for the wrong function.  And not that it matters, but cpuid_entry2_find()
will always return a precise match for CPUID.0x7.0x0 since the index is
significant.

No functional change intended.

Reviewed-by: Maxim Levitsky <mlevitsk@redhat.com>
Reviewed-by: Binbin Wu <binbin.wu@linux.intel.com>
Reviewed-by: Xiaoyao Li <xiaoyao.li@intel.com>
Link: https://lore.kernel.org/r/20241128013424.4096668-47-seanjc@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>

diff --git a/arch/x86/kvm/cpuid.c b/arch/x86/kvm/cpuid.c
index 688c7c36c73bb238ca03f3a8a160f48dc5713ac8..ced3c08a99c2ea5ff4dce59489f32a6298a3821c 100644 (file)
--- a/arch/x86/kvm/cpuid.c
+++ b/arch/x86/kvm/cpuid.c
@@ -312,7 +312,7 @@ void kvm_update_cpuid_runtime(struct kvm_vcpu *vcpu)
        }
 
        best = kvm_find_cpuid_entry_index(vcpu, 7, 0);
-       if (best && boot_cpu_has(X86_FEATURE_PKU) && best->function == 0x7)
+       if (best && boot_cpu_has(X86_FEATURE_PKU))
                cpuid_entry_change(best, X86_FEATURE_OSPKE,
                                   kvm_is_cr4_bit_set(vcpu, X86_CR4_PKE));