KVM: Add instruction-set-specific exit qualifications to kvm_exit trace
The exit reason alone is insufficient to understand exactly why an exit
occured; add ISA-specific trace parameters for additional information.
Because fetching these parameters is expensive on vmx, and because these
parameters are fetched even if tracing is disabled, we fetch the
parameters via a callback instead of as traditional trace arguments.
Signed-off-by: Avi Kivity <avi@redhat.com>
diff --git a/arch/x86/kvm/trace.h b/arch/x86/kvm/trace.h
index 1061022..1357d7c 100644
--- a/arch/x86/kvm/trace.h
+++ b/arch/x86/kvm/trace.h
@@ -192,18 +192,22 @@
__field( unsigned int, exit_reason )
__field( unsigned long, guest_rip )
__field( u32, isa )
+ __field( u64, info1 )
+ __field( u64, info2 )
),
TP_fast_assign(
__entry->exit_reason = exit_reason;
__entry->guest_rip = kvm_rip_read(vcpu);
__entry->isa = isa;
+ kvm_x86_ops->get_exit_info(vcpu, &__entry->info1,
+ &__entry->info2);
),
- TP_printk("reason %s rip 0x%lx",
+ TP_printk("reason %s rip 0x%lx info %llx %llx",
ftrace_print_symbols_seq(p, __entry->exit_reason,
kvm_x86_ops->exit_reasons_str),
- __entry->guest_rip)
+ __entry->guest_rip, __entry->info1, __entry->info2)
);
/*