diff options
| author | James Hogan <james.hogan@imgtec.com> | 2016-06-14 11:40:14 +0300 |
|---|---|---|
| committer | Paolo Bonzini <pbonzini@redhat.com> | 2016-06-14 12:16:24 +0300 |
| commit | 93258604ab6d3f2bdc6cb02f61961af56712f144 (patch) | |
| tree | 999610e5e0d6bcb59b8a842344b1a1fd8b0669cd /arch/mips | |
| parent | 9887d1c75ba2f210b403d536ab025d4b2b36fb57 (diff) | |
| download | linux-93258604ab6d3f2bdc6cb02f61961af56712f144.tar.xz | |
MIPS: KVM: Add guest mode switch trace events
Add a few trace events for entering and coming out of guest mode, as well
as re-entering it from a guest exit exception.
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Radim Krčmář <rkrcmar@redhat.com>
Cc: Ralf Baechle <ralf@linux-mips.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: kvm@vger.kernel.org
Cc: linux-mips@linux-mips.org
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
Diffstat (limited to 'arch/mips')
| -rw-r--r-- | arch/mips/kvm/mips.c | 4 | ||||
| -rw-r--r-- | arch/mips/kvm/trace.h | 48 |
2 files changed, 52 insertions, 0 deletions
diff --git a/arch/mips/kvm/mips.c b/arch/mips/kvm/mips.c index e9e40b9dd9be..b5ad2ba1847a 100644 --- a/arch/mips/kvm/mips.c +++ b/arch/mips/kvm/mips.c @@ -410,7 +410,9 @@ int kvm_arch_vcpu_ioctl_run(struct kvm_vcpu *vcpu, struct kvm_run *run) /* Disable hardware page table walking while in guest */ htw_stop(); + trace_kvm_enter(vcpu); r = vcpu->arch.vcpu_run(run, vcpu); + trace_kvm_out(vcpu); /* Re-enable HTW before enabling interrupts */ htw_start(); @@ -1389,6 +1391,8 @@ skip_emul: } if (ret == RESUME_GUEST) { + trace_kvm_reenter(vcpu); + /* * If FPU / MSA are enabled (i.e. the guest's FPU / MSA context * is live), restore FCR31 / MSACSR. diff --git a/arch/mips/kvm/trace.h b/arch/mips/kvm/trace.h index 7daf7474d6a6..aec1c43f2b44 100644 --- a/arch/mips/kvm/trace.h +++ b/arch/mips/kvm/trace.h @@ -17,6 +17,54 @@ #define TRACE_INCLUDE_PATH . #define TRACE_INCLUDE_FILE trace +/* + * Tracepoints for VM enters + */ +TRACE_EVENT(kvm_enter, + TP_PROTO(struct kvm_vcpu *vcpu), + TP_ARGS(vcpu), + TP_STRUCT__entry( + __field(unsigned long, pc) + ), + + TP_fast_assign( + __entry->pc = vcpu->arch.pc; + ), + + TP_printk("PC: 0x%08lx", + __entry->pc) +); + +TRACE_EVENT(kvm_reenter, + TP_PROTO(struct kvm_vcpu *vcpu), + TP_ARGS(vcpu), + TP_STRUCT__entry( + __field(unsigned long, pc) + ), + + TP_fast_assign( + __entry->pc = vcpu->arch.pc; + ), + + TP_printk("PC: 0x%08lx", + __entry->pc) +); + +TRACE_EVENT(kvm_out, + TP_PROTO(struct kvm_vcpu *vcpu), + TP_ARGS(vcpu), + TP_STRUCT__entry( + __field(unsigned long, pc) + ), + + TP_fast_assign( + __entry->pc = vcpu->arch.pc; + ), + + TP_printk("PC: 0x%08lx", + __entry->pc) +); + /* The first 32 exit reasons correspond to Cause.ExcCode */ #define KVM_TRACE_EXIT_INT 0 #define KVM_TRACE_EXIT_TLBMOD 1 |