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kvm: add tracepoint for fast mmio 

Cc: Gleb Natapov <gleb@kernel.org>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
This commit is contained in:
Jason Wang 2015-09-15 14:41:58 +08:00 committed by Paolo Bonzini
parent d3febddde9
commit 931c33b178
3 changed files with 20 additions and 0 deletions
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18
arch/x86/kvm/trace.h
View File

@ -128,6 +128,24 @@ TRACE_EVENT(kvm_pio,
__entry->count > 1 ? "(...)" : "")
);
/*
* Tracepoint for fast mmio.
*/
TRACE_EVENT(kvm_fast_mmio,
TP_PROTO(u64 gpa),
TP_ARGS(gpa),
TP_STRUCT__entry(
__field(u64, gpa)
),
TP_fast_assign(
__entry->gpa = gpa;
),
TP_printk("fast mmio at gpa 0x%llx", __entry->gpa)
);
/*
* Tracepoint for cpuid.
*/

1
arch/x86/kvm/vmx.c
View File

@ -5756,6 +5756,7 @@ static int handle_ept_misconfig(struct kvm_vcpu *vcpu)
gpa = vmcs_read64(GUEST_PHYSICAL_ADDRESS);
if (!kvm_io_bus_write(vcpu, KVM_FAST_MMIO_BUS, gpa, 0, NULL)) {
skip_emulated_instruction(vcpu);
trace_kvm_fast_mmio(gpa);
return 1;
}

1
arch/x86/kvm/x86.c
View File

@ -8070,6 +8070,7 @@ bool kvm_arch_has_noncoherent_dma(struct kvm *kvm)
EXPORT_SYMBOL_GPL(kvm_arch_has_noncoherent_dma);
EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_exit);
EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_fast_mmio);
EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_inj_virq);
EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_page_fault);
EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_msr);