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KVM: trace guest fpu loads and unloads 

Signed-off-by: Avi Kivity <avi@redhat.com>
Signed-off-by: Marcelo Tosatti <mtosatti@redhat.com>
This commit is contained in:
Avi Kivity 2010-01-21 15:31:52 +02:00 committed by Marcelo Tosatti
parent 8ae0991276
commit 0c04851c0c
2 changed files with 21 additions and 0 deletions
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2
arch/x86/kvm/x86.c
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@ -5292,6 +5292,7 @@ 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)
@ -5304,6 +5305,7 @@ 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)

19
include/trace/events/kvm.h
View File

@ -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 */