KVM: Trace mmio

Signed-off-by: Avi Kivity <avi@redhat.com>

1 files changed, 10 insertions, 1 deletions

diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index af40e23df25..d32e3c6d317 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -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?
          */