[PATCH 8/8] KVM: trace guest fpu loads and unloads

Avi Kivity
2010-01-21T13:31:55Z

Signed-off-by: Avi Kivity <avi@redhat.com>
---
arch/x86/kvm/x86.c | 2 ++
include/trace/events/kvm.h | 19 +++++++++++++++++++
2 files changed, 21 insertions(+), 0 deletions(-)

diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 8b42c19..06a03c1 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -5304,6 +5304,7 @@ void kvm_load_guest_fpu(struct kvm_vcpu *vcpu)
vcpu->guest_fpu_loaded = 1;
kvm_fx_save(&vcpu->arch.host_fx_image);
kvm_fx_restore(&vcpu->arch.guest_fx_image);
+ trace_kvm_fpu(1);
}

void kvm_put_guest_fpu(struct kvm_vcpu *vcpu)
@@ -5316,6 +5317,7 @@ void kvm_put_guest_fpu(struct kvm_vcpu *vcpu)
kvm_fx_restore(&vcpu->arch.host_fx_image);
++vcpu->stat.fpu_reload;
set_bit(KVM_REQ_DEACTIVATE_FPU, &vcpu->requests);
+ trace_kvm_fpu(0);
}

void kvm_arch_vcpu_free(struct kvm_vcpu *vcpu)
diff --git a/include/trace/events/kvm.h b/include/trace/events/kvm.h
index dbe1084..8abdc12 100644
--- a/include/trace/events/kvm.h
+++ b/include/trace/events/kvm.h
@@ -145,6 +145,25 @@ TRACE_EVENT(kvm_mmio,
__entry->len, __entry->gpa, __entry->val)
);

+#define kvm_fpu_load_symbol \
+ {0, "unload"}, \
+ {1, "load"}
+
+TRACE_EVENT(kvm_fpu,
+ TP_PROTO(int load),
+ TP_ARGS(load),
+
+ TP_STRUCT__entry(
+ __field( u32, load )
+ ),
+
+ TP_fast_assign(
+ __entry->load = load;
+ ),
+
+ TP_printk("%s", __print_symbolic(__entry->load, kvm_fpu_load_symbol))
+);
+
#endif /* _TRACE_KVM_MAIN_H */

/* This part must be outside protection */
--
1.6.5.3