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| author | Vitaly Kuznetsov <vkuznets@redhat.com> | 2021-07-30 14:26:23 +0200 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2021-08-03 12:16:40 +0200 |
| commit | f5714bbb5b3120b33dfbf3d81ffc0b98ae4cd4c1 (patch) | |
| tree | 1311f587a08b6fdd4c652f6396527a186d521752 /arch/x86 | |
| parent | KVM: x86: hyper-v: Check access to hypercall before reading XMM registers (diff) | |
| download | linux-f5714bbb5b3120b33dfbf3d81ffc0b98ae4cd4c1.tar.xz linux-f5714bbb5b3120b33dfbf3d81ffc0b98ae4cd4c1.zip | |
KVM: x86: Introduce trace_kvm_hv_hypercall_done()
Hypercall failures are unusual with potentially far going consequences
so it would be useful to see their results when tracing.
Signed-off-by: Vitaly Kuznetsov <vkuznets@redhat.com>
Reviewed-by: Siddharth Chandrasekaran <sidcha@amazon.de>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Message-Id: <20210730122625.112848-3-vkuznets@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/x86')
| -rw-r--r-- | arch/x86/kvm/hyperv.c | 1 | ||||
| -rw-r--r-- | arch/x86/kvm/trace.h | 15 |
2 files changed, 16 insertions, 0 deletions
diff --git a/arch/x86/kvm/hyperv.c b/arch/x86/kvm/hyperv.c index cb7e045905a5..2945b93dbadd 100644 --- a/arch/x86/kvm/hyperv.c +++ b/arch/x86/kvm/hyperv.c @@ -2016,6 +2016,7 @@ static void kvm_hv_hypercall_set_result(struct kvm_vcpu *vcpu, u64 result) static int kvm_hv_hypercall_complete(struct kvm_vcpu *vcpu, u64 result) { + trace_kvm_hv_hypercall_done(result); kvm_hv_hypercall_set_result(vcpu, result); ++vcpu->stat.hypercalls; return kvm_skip_emulated_instruction(vcpu); diff --git a/arch/x86/kvm/trace.h b/arch/x86/kvm/trace.h index b484141ea15b..03ebe368333e 100644 --- a/arch/x86/kvm/trace.h +++ b/arch/x86/kvm/trace.h @@ -92,6 +92,21 @@ TRACE_EVENT(kvm_hv_hypercall, __entry->outgpa) ); +TRACE_EVENT(kvm_hv_hypercall_done, + TP_PROTO(u64 result), + TP_ARGS(result), + + TP_STRUCT__entry( + __field(__u64, result) + ), + + TP_fast_assign( + __entry->result = result; + ), + + TP_printk("result 0x%llx", __entry->result) +); + /* * Tracepoint for Xen hypercall. */ |