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Groups > linux.kernel > #1212776 > unrolled thread

[PATCH V2 3/3] kvm: add tracepoint for fast mmio

Started byJason Wang <jasowang@redhat.com>
First post2015-08-25 09:50 +0200
Last post2015-08-26 07:10 +0200
Articles 3 — 2 participants

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  [PATCH V2 3/3] kvm: add tracepoint for fast mmio Jason Wang <jasowang@redhat.com> - 2015-08-25 09:50 +0200
    Re: [PATCH V2 3/3] kvm: add tracepoint for fast mmio "Michael S. Tsirkin" <mst@redhat.com> - 2015-08-25 13:40 +0200
      Re: [PATCH V2 3/3] kvm: add tracepoint for fast mmio Jason Wang <jasowang@redhat.com> - 2015-08-26 07:10 +0200

#1212776 — [PATCH V2 3/3] kvm: add tracepoint for fast mmio

FromJason Wang <jasowang@redhat.com>
Date2015-08-25 09:50 +0200
Subject[PATCH V2 3/3] kvm: add tracepoint for fast mmio
Message-ID<q1h9v-8th-13@gated-at.bofh.it>
Cc: Gleb Natapov <gleb@kernel.org>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
---
 arch/x86/kvm/trace.h | 17 +++++++++++++++++
 arch/x86/kvm/vmx.c   |  1 +
 arch/x86/kvm/x86.c   |  1 +
 3 files changed, 19 insertions(+)

diff --git a/arch/x86/kvm/trace.h b/arch/x86/kvm/trace.h
index 4eae7c3..2d4e81a 100644
--- a/arch/x86/kvm/trace.h
+++ b/arch/x86/kvm/trace.h
@@ -128,6 +128,23 @@ TRACE_EVENT(kvm_pio,
 		  __entry->count > 1 ? "(...)" : "")
 );
 
+TRACE_EVENT(kvm_fast_mmio,
+	TP_PROTO(u64 gpa),
+	TP_ARGS(gpa),
+
+	TP_STRUCT__entry(
+		__field(u64,	gpa)
+	),
+
+	TP_fast_assign(
+		__entry->gpa		= gpa;
+	),
+
+	TP_printk("fast mmio at gpa 0x%llx", __entry->gpa)
+);
+
+
+
 /*
  * Tracepoint for cpuid.
  */
diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
index 83b7b5c..a55d279 100644
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -5831,6 +5831,7 @@ static int handle_ept_misconfig(struct kvm_vcpu *vcpu)
 	gpa = vmcs_read64(GUEST_PHYSICAL_ADDRESS);
 	if (!kvm_io_bus_write(vcpu, KVM_FAST_MMIO_BUS, gpa, 0, NULL)) {
 		skip_emulated_instruction(vcpu);
+		trace_kvm_fast_mmio(gpa);
 		return 1;
 	}
 
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 8f0f6ec..36cf78e 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -8254,6 +8254,7 @@ bool kvm_arch_has_noncoherent_dma(struct kvm *kvm)
 EXPORT_SYMBOL_GPL(kvm_arch_has_noncoherent_dma);
 
 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_exit);
+EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_fast_mmio);
 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_inj_virq);
 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_page_fault);
 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_msr);
-- 
2.1.4

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#1212974

From"Michael S. Tsirkin" <mst@redhat.com>
Date2015-08-25 13:40 +0200
Message-ID<q1kK6-5cL-3@gated-at.bofh.it>
In reply to#1212776
On Tue, Aug 25, 2015 at 03:47:15PM +0800, Jason Wang wrote:
> Cc: Gleb Natapov <gleb@kernel.org>
> Cc: Paolo Bonzini <pbonzini@redhat.com>
> Cc: Michael S. Tsirkin <mst@redhat.com>
> Signed-off-by: Jason Wang <jasowang@redhat.com>
> ---
>  arch/x86/kvm/trace.h | 17 +++++++++++++++++
>  arch/x86/kvm/vmx.c   |  1 +
>  arch/x86/kvm/x86.c   |  1 +
>  3 files changed, 19 insertions(+)
> 
> diff --git a/arch/x86/kvm/trace.h b/arch/x86/kvm/trace.h
> index 4eae7c3..2d4e81a 100644
> --- a/arch/x86/kvm/trace.h
> +++ b/arch/x86/kvm/trace.h
> @@ -128,6 +128,23 @@ TRACE_EVENT(kvm_pio,
>  		  __entry->count > 1 ? "(...)" : "")
>  );
>  
> +TRACE_EVENT(kvm_fast_mmio,
> +	TP_PROTO(u64 gpa),
> +	TP_ARGS(gpa),
> +
> +	TP_STRUCT__entry(
> +		__field(u64,	gpa)
> +	),
> +
> +	TP_fast_assign(
> +		__entry->gpa		= gpa;
> +	),
> +
> +	TP_printk("fast mmio at gpa 0x%llx", __entry->gpa)
> +);
> +
> +
> +

don't add multiple empty lines please.

>  /*
>   * Tracepoint for cpuid.
>   */
> diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
> index 83b7b5c..a55d279 100644
> --- a/arch/x86/kvm/vmx.c
> +++ b/arch/x86/kvm/vmx.c
> @@ -5831,6 +5831,7 @@ static int handle_ept_misconfig(struct kvm_vcpu *vcpu)
>  	gpa = vmcs_read64(GUEST_PHYSICAL_ADDRESS);
>  	if (!kvm_io_bus_write(vcpu, KVM_FAST_MMIO_BUS, gpa, 0, NULL)) {
>  		skip_emulated_instruction(vcpu);
> +		trace_kvm_fast_mmio(gpa);
>  		return 1;
>  	}
>  
> diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
> index 8f0f6ec..36cf78e 100644
> --- a/arch/x86/kvm/x86.c
> +++ b/arch/x86/kvm/x86.c
> @@ -8254,6 +8254,7 @@ bool kvm_arch_has_noncoherent_dma(struct kvm *kvm)
>  EXPORT_SYMBOL_GPL(kvm_arch_has_noncoherent_dma);
>  
>  EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_exit);
> +EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_fast_mmio);
>  EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_inj_virq);
>  EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_page_fault);
>  EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_msr);
> -- 
> 2.1.4
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#1213539

FromJason Wang <jasowang@redhat.com>
Date2015-08-26 07:10 +0200
Message-ID<q1B8e-4is-9@gated-at.bofh.it>
In reply to#1212974

On 08/25/2015 07:34 PM, Michael S. Tsirkin wrote:
> On Tue, Aug 25, 2015 at 03:47:15PM +0800, Jason Wang wrote:
>> > Cc: Gleb Natapov <gleb@kernel.org>
>> > Cc: Paolo Bonzini <pbonzini@redhat.com>
>> > Cc: Michael S. Tsirkin <mst@redhat.com>
>> > Signed-off-by: Jason Wang <jasowang@redhat.com>
>> > ---
>> >  arch/x86/kvm/trace.h | 17 +++++++++++++++++
>> >  arch/x86/kvm/vmx.c   |  1 +
>> >  arch/x86/kvm/x86.c   |  1 +
>> >  3 files changed, 19 insertions(+)
>> > 
>> > diff --git a/arch/x86/kvm/trace.h b/arch/x86/kvm/trace.h
>> > index 4eae7c3..2d4e81a 100644
>> > --- a/arch/x86/kvm/trace.h
>> > +++ b/arch/x86/kvm/trace.h
>> > @@ -128,6 +128,23 @@ TRACE_EVENT(kvm_pio,
>> >  		  __entry->count > 1 ? "(...)" : "")
>> >  );
>> >  
>> > +TRACE_EVENT(kvm_fast_mmio,
>> > +	TP_PROTO(u64 gpa),
>> > +	TP_ARGS(gpa),
>> > +
>> > +	TP_STRUCT__entry(
>> > +		__field(u64,	gpa)
>> > +	),
>> > +
>> > +	TP_fast_assign(
>> > +		__entry->gpa		= gpa;
>> > +	),
>> > +
>> > +	TP_printk("fast mmio at gpa 0x%llx", __entry->gpa)
>> > +);
>> > +
>> > +
>> > +
> don't add multiple empty lines please.
>

Ok
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