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Commit aec51dc4 authored by Avi Kivity's avatar Avi Kivity
Browse files

KVM: Trace mmio 



Signed-off-by: default avatarAvi Kivity <avi@redhat.com>
parent c323c0e5

arch/x86/kvm/x86.c

+10 −1
Original line number Diff line number Diff line
@@ -37,6 +37,8 @@ 
#include <linux/iommu.h>

#include <linux/intel-iommu.h>

#include <linux/cpufreq.h>

#include <trace/events/kvm.h>

#undef TRACE_INCLUDE_FILE

#define CREATE_TRACE_POINTS

#include "trace.h"
@@ -2425,6 +2427,8 @@ static int emulator_read_emulated(unsigned long addr, 


	if (vcpu->mmio_read_completed) {

		memcpy(val, vcpu->mmio_data, bytes);

		trace_kvm_mmio(KVM_TRACE_MMIO_READ, bytes,

			       vcpu->mmio_phys_addr, *(u64 *)val);

		vcpu->mmio_read_completed = 0;

		return X86EMUL_CONTINUE;

	}
@@ -2445,8 +2449,12 @@ static int emulator_read_emulated(unsigned long addr, 
	/*

	 * Is this MMIO handled locally?

	 */

	if (!vcpu_mmio_read(vcpu, gpa, bytes, val))

	if (!vcpu_mmio_read(vcpu, gpa, bytes, val)) {

		trace_kvm_mmio(KVM_TRACE_MMIO_READ, bytes, gpa, *(u64 *)val);

		return X86EMUL_CONTINUE;

	}



	trace_kvm_mmio(KVM_TRACE_MMIO_READ_UNSATISFIED, bytes, gpa, 0);



	vcpu->mmio_needed = 1;

	vcpu->mmio_phys_addr = gpa;
@@ -2490,6 +2498,7 @@ static int emulator_write_emulated_onepage(unsigned long addr, 
		return X86EMUL_CONTINUE;



mmio:

	trace_kvm_mmio(KVM_TRACE_MMIO_WRITE, bytes, gpa, *(u64 *)val);

	/*

	 * Is this MMIO handled locally?

	 */

include/trace/events/kvm.h

+33 −0
Original line number Diff line number Diff line
@@ -56,6 +56,39 @@ TRACE_EVENT(kvm_ack_irq, 




#endif /* defined(__KVM_HAVE_IOAPIC) */



#define KVM_TRACE_MMIO_READ_UNSATISFIED 0

#define KVM_TRACE_MMIO_READ 1

#define KVM_TRACE_MMIO_WRITE 2



#define kvm_trace_symbol_mmio \

	{ KVM_TRACE_MMIO_READ_UNSATISFIED, "unsatisfied-read" }, \

	{ KVM_TRACE_MMIO_READ, "read" }, \

	{ KVM_TRACE_MMIO_WRITE, "write" }



TRACE_EVENT(kvm_mmio,

	TP_PROTO(int type, int len, u64 gpa, u64 val),

	TP_ARGS(type, len, gpa, val),



	TP_STRUCT__entry(

		__field(	u32,	type		)

		__field(	u32,	len		)

		__field(	u64,	gpa		)

		__field(	u64,	val		)

	),



	TP_fast_assign(

		__entry->type		= type;

		__entry->len		= len;

		__entry->gpa		= gpa;

		__entry->val		= val;

	),



	TP_printk("mmio %s len %u gpa 0x%llx val 0x%llx",

		  __print_symbolic(__entry->type, kvm_trace_symbol_mmio),

		  __entry->len, __entry->gpa, __entry->val)

);



#endif /* _TRACE_KVM_MAIN_H */



/* This part must be outside protection */