From 9887d1c75ba2f210b403d536ab025d4b2b36fb57 Mon Sep 17 00:00:00 2001 From: James Hogan Date: Tue, 14 Jun 2016 09:40:13 +0100 Subject: [PATCH] MIPS: KVM: Add kvm_asid_change trace event MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit Add a trace event for guest ASID changes, replacing the existing kvm_debug call. Signed-off-by: James Hogan Cc: Paolo Bonzini Cc: Radim Krčmář Cc: Ralf Baechle Cc: Steven Rostedt Cc: Ingo Molnar Cc: kvm@vger.kernel.org Cc: linux-mips@linux-mips.org Signed-off-by: Paolo Bonzini --- arch/mips/kvm/emulate.c | 7 +++---- arch/mips/kvm/trace.h | 22 ++++++++++++++++++++++ 2 files changed, 25 insertions(+), 4 deletions(-) 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 @@ enum emulation_result kvm_mips_emulate_CP0(u32 inst, u32 *opc, u32 cause, 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 @@ TRACE_EVENT(kvm_aux, __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 */ -- 2.7.4