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    Subject[PATCH 20/38] KVM: trace guest fpu loads and unloads
    Date
    Signed-off-by: Avi Kivity <avi@redhat.com>
    Signed-off-by: Marcelo Tosatti <mtosatti@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 27af6e3..3b90298 100644
    --- a/arch/x86/kvm/x86.c
    +++ b/arch/x86/kvm/x86.c
    @@ -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)
    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


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