KVM: Trace failed msr reads and writes
Record failed msrs reads and writes, and the fact that they failed as well.
Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
diff --git a/arch/x86/kvm/trace.h b/arch/x86/kvm/trace.h
index 45903a9..6ad30a2 100644
--- a/arch/x86/kvm/trace.h
+++ b/arch/x86/kvm/trace.h
@@ -246,28 +246,33 @@
* Tracepoint for guest MSR access.
*/
TRACE_EVENT(kvm_msr,
- TP_PROTO(unsigned write, u32 ecx, u64 data),
- TP_ARGS(write, ecx, data),
+ TP_PROTO(unsigned write, u32 ecx, u64 data, bool exception),
+ TP_ARGS(write, ecx, data, exception),
TP_STRUCT__entry(
__field( unsigned, write )
__field( u32, ecx )
__field( u64, data )
+ __field( u8, exception )
),
TP_fast_assign(
__entry->write = write;
__entry->ecx = ecx;
__entry->data = data;
+ __entry->exception = exception;
),
- TP_printk("msr_%s %x = 0x%llx",
+ TP_printk("msr_%s %x = 0x%llx%s",
__entry->write ? "write" : "read",
- __entry->ecx, __entry->data)
+ __entry->ecx, __entry->data,
+ __entry->exception ? " (#GP)" : "")
);
-#define trace_kvm_msr_read(ecx, data) trace_kvm_msr(0, ecx, data)
-#define trace_kvm_msr_write(ecx, data) trace_kvm_msr(1, ecx, data)
+#define trace_kvm_msr_read(ecx, data) trace_kvm_msr(0, ecx, data, false)
+#define trace_kvm_msr_write(ecx, data) trace_kvm_msr(1, ecx, data, false)
+#define trace_kvm_msr_read_ex(ecx) trace_kvm_msr(0, ecx, 0, true)
+#define trace_kvm_msr_write_ex(ecx, data) trace_kvm_msr(1, ecx, data, true)
/*
* Tracepoint for guest CR access.