diff options
| author | Sean Christopherson <sean.j.christopherson@intel.com> | 2020-03-17 12:53:53 -0700 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2020-03-18 13:44:18 +0100 |
| commit | e7adda281063becab7631c6ac60f8b19684ba042 (patch) | |
| tree | f9c1289722552c936b8c840770f685a63a52eefb /arch/x86/kvm/cpuid.c | |
| parent | d55c9d4009c7622e081cbe599c673076b9854ea1 (diff) | |
KVM: x86: Add requested index to the CPUID tracepoint
Output the requested index when tracing CPUID emulation; it's basically
mandatory for leafs where the index is meaningful, and is helpful for
verifying KVM correctness even when the index isn't meaningful, e.g. the
trace for a Linux guest's hypervisor_cpuid_base() probing appears to
be broken (returns all zeroes) at first glance, but is correct because
the index is non-zero, i.e. the output values correspond to a random
index in the maximum basic leaf.
Suggested-by: Xiaoyao Li <xiaoyao.li@intel.com>
Cc: Jan Kiszka <jan.kiszka@siemens.com>
Signed-off-by: Sean Christopherson <sean.j.christopherson@intel.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86/kvm/cpuid.c')
| -rw-r--r-- | arch/x86/kvm/cpuid.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/kvm/cpuid.c b/arch/x86/kvm/cpuid.c index 435a7da07d5f..2de721f3c420 100644 --- a/arch/x86/kvm/cpuid.c +++ b/arch/x86/kvm/cpuid.c @@ -1026,7 +1026,7 @@ bool kvm_cpuid(struct kvm_vcpu *vcpu, u32 *eax, u32 *ebx, } } } - trace_kvm_cpuid(orig_function, *eax, *ebx, *ecx, *edx, exact); + trace_kvm_cpuid(orig_function, index, *eax, *ebx, *ecx, *edx, exact); return exact; } EXPORT_SYMBOL_GPL(kvm_cpuid); |