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KVM: Trace mmio

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Signed-off-by: Avi Kivity <avi@redhat.com>
This commit is contained in:
Avi Kivity 2009-07-01 16:01:02 +03:00
parent c323c0e5f0
commit aec51dc4f1
2 changed files with 43 additions and 1 deletions
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11
arch/x86/kvm/x86.c
View file

@ -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 @@ mmio:
/*
* 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?
*/

33
include/trace/events/kvm.h
View file

@ -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 */