From: Jan Kiszka Date: Thu, 5 Mar 2020 01:34:31 +0000 (-0800) Subject: KVM: x86: Trace the original requested CPUID function in kvm_cpuid() X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=b7fb8488c85f2b5304e90d954a54d980adde60a4;p=linux.git KVM: x86: Trace the original requested CPUID function in kvm_cpuid() Trace the requested CPUID function instead of the effective function, e.g. if the requested function is out-of-range and KVM is emulating an Intel CPU, as the intent of the tracepoint is to show if the output came from the actual leaf as opposed to the max basic leaf via redirection. Similarly, leave "found" as is, i.e. report that an entry was found if and only if the requested entry was found. Fixes: 43561123ab37 ("kvm: x86: Improve emulation of CPUID leaves 0BH and 1FH") Signed-off-by: Jan Kiszka [Sean: Drop "found" semantic change, reword changelong accordingly ] Signed-off-by: Sean Christopherson Signed-off-by: Paolo Bonzini --- diff --git a/arch/x86/kvm/cpuid.c b/arch/x86/kvm/cpuid.c index 78d461be21023..a25b520d26c9d 100644 --- a/arch/x86/kvm/cpuid.c +++ b/arch/x86/kvm/cpuid.c @@ -933,7 +933,7 @@ static bool cpuid_function_in_range(struct kvm_vcpu *vcpu, u32 function) bool kvm_cpuid(struct kvm_vcpu *vcpu, u32 *eax, u32 *ebx, u32 *ecx, u32 *edx, bool check_limit) { - u32 function = *eax, index = *ecx; + u32 orig_function = *eax, function = *eax, index = *ecx; struct kvm_cpuid_entry2 *entry; struct kvm_cpuid_entry2 *max; bool found; @@ -982,7 +982,7 @@ bool kvm_cpuid(struct kvm_vcpu *vcpu, u32 *eax, u32 *ebx, } } } - trace_kvm_cpuid(function, *eax, *ebx, *ecx, *edx, found); + trace_kvm_cpuid(orig_function, *eax, *ebx, *ecx, *edx, found); return found; } EXPORT_SYMBOL_GPL(kvm_cpuid);