MIPS: KVM: Add kvm_asid_change trace event
Add a trace event for guest ASID changes, replacing the existing
kvm_debug call.
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>
diff --git a/arch/mips/kvm/emulate.c b/arch/mips/kvm/emulate.c
index fce08bd..ee0e61d 100644
--- a/arch/mips/kvm/emulate.c
+++ b/arch/mips/kvm/emulate.c
@@ -1082,11 +1082,10 @@
if ((KSEGX(vcpu->arch.gprs[rt]) != CKSEG0) &&
((kvm_read_c0_guest_entryhi(cop0) &
KVM_ENTRYHI_ASID) != nasid)) {
- kvm_debug("MTCz, change ASID from %#lx to %#lx\n",
+ trace_kvm_asid_change(vcpu,
kvm_read_c0_guest_entryhi(cop0)
- & KVM_ENTRYHI_ASID,
- vcpu->arch.gprs[rt]
- & KVM_ENTRYHI_ASID);
+ & KVM_ENTRYHI_ASID,
+ nasid);
/* Blow away the shadow host TLBs */
kvm_mips_flush_host_tlb(1);
diff --git a/arch/mips/kvm/trace.h b/arch/mips/kvm/trace.h
index ffa6ee8..7daf747 100644
--- a/arch/mips/kvm/trace.h
+++ b/arch/mips/kvm/trace.h
@@ -122,6 +122,28 @@
__entry->pc)
);
+TRACE_EVENT(kvm_asid_change,
+ TP_PROTO(struct kvm_vcpu *vcpu, unsigned int old_asid,
+ unsigned int new_asid),
+ TP_ARGS(vcpu, old_asid, new_asid),
+ TP_STRUCT__entry(
+ __field(unsigned long, pc)
+ __field(u8, old_asid)
+ __field(u8, new_asid)
+ ),
+
+ TP_fast_assign(
+ __entry->pc = vcpu->arch.pc;
+ __entry->old_asid = old_asid;
+ __entry->new_asid = new_asid;
+ ),
+
+ TP_printk("PC: 0x%08lx old: 0x%02x new: 0x%02x",
+ __entry->pc,
+ __entry->old_asid,
+ __entry->new_asid)
+);
+
#endif /* _TRACE_KVM_H */
/* This part must be outside protection */