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From: Tomoki Sekiyama <tomoki.sekiyama.qu@hitachi.com>
To: kvm@vger.kernel.org
Cc: linux-kernel@vger.kernel.org, x86@kernel.org,
	yrl.pp-manager.tt@hitachi.com,
	Tomoki Sekiyama <tomoki.sekiyama.qu@hitachi.com>,
	Avi Kivity <avi@redhat.com>,
	Marcelo Tosatti <mtosatti@redhat.com>,
	Thomas Gleixner <tglx@linutronix.de>,
	Ingo Molnar <mingo@redhat.com>, "H. Peter Anvin" <hpa@zytor.com>
Subject: [RFC v2 PATCH 15/21] KVM: add tracepoint on enabling/disabling direct interrupt delivery
Date: Thu, 06 Sep 2012 20:28:38 +0900	[thread overview]
Message-ID: <20120906112837.13320.36521.stgit@kvmdev> (raw)
In-Reply-To: <20120906112718.13320.8231.stgit@kvmdev>

Add trace event "kvm_set_direct_interrupt" to trace enabling/disabling
direct interrupt delivery on slave CPUs. At the event, the guest rip and
whether the feature is enabled or not is logged.

Signed-off-by: Tomoki Sekiyama <tomoki.sekiyama.qu@hitachi.com>
Cc: Avi Kivity <avi@redhat.com>
Cc: Marcelo Tosatti <mtosatti@redhat.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
---

 arch/x86/kvm/trace.h |   18 ++++++++++++++++++
 arch/x86/kvm/vmx.c   |    2 ++
 arch/x86/kvm/x86.c   |    1 +
 3 files changed, 21 insertions(+), 0 deletions(-)

diff --git a/arch/x86/kvm/trace.h b/arch/x86/kvm/trace.h
index a71faf7..6081be7 100644
--- a/arch/x86/kvm/trace.h
+++ b/arch/x86/kvm/trace.h
@@ -551,6 +551,24 @@ TRACE_EVENT(kvm_pv_eoi,
 	TP_printk("apicid %x vector %d", __entry->apicid, __entry->vector)
 );
 
+TRACE_EVENT(kvm_set_direct_interrupt,
+	TP_PROTO(struct kvm_vcpu *vcpu, bool enabled),
+	TP_ARGS(vcpu, enabled),
+
+	TP_STRUCT__entry(
+		__field(	unsigned long,	guest_rip	)
+		__field(	bool,	        enabled         )
+	),
+
+	TP_fast_assign(
+		__entry->guest_rip	= kvm_rip_read(vcpu);
+		__entry->enabled        = enabled;
+	),
+
+	TP_printk("rip 0x%lx enabled %d",
+		 __entry->guest_rip, __entry->enabled)
+);
+
 /*
  * Tracepoint for nested VMRUN
  */
diff --git a/arch/x86/kvm/vmx.c b/arch/x86/kvm/vmx.c
index 605abea..6dc59c8 100644
--- a/arch/x86/kvm/vmx.c
+++ b/arch/x86/kvm/vmx.c
@@ -1719,6 +1719,8 @@ static void vmx_set_direct_interrupt(struct kvm_vcpu *vcpu, bool enabled)
 	else
 		vmcs_set_bits(PIN_BASED_VM_EXEC_CONTROL,
 			      PIN_BASED_EXT_INTR_MASK);
+
+	trace_kvm_set_direct_interrupt(vcpu, enabled);
 }
 
 static void vmx_set_slave_mode(struct kvm_vcpu *vcpu, bool slave)
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index b7d28df..1449187 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -6936,3 +6936,4 @@ EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_intr_vmexit);
 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_invlpga);
 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_skinit);
 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_nested_intercepts);
+EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_set_direct_interrupt);



  parent reply	other threads:[~2012-09-06 11:31 UTC|newest]

Thread overview: 29+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2012-09-06 11:27 [RFC v2 PATCH 00/21] KVM: x86: CPU isolation and direct interrupts delivery to guests Tomoki Sekiyama
2012-09-06 11:27 ` [RFC v2 PATCH 01/21] x86: Split memory hotplug function from cpu_up() as cpu_memory_up() Tomoki Sekiyama
2012-09-06 11:31   ` Avi Kivity
2012-09-06 11:32     ` Avi Kivity
2012-09-06 11:27 ` [RFC v2 PATCH 02/21] x86: Add a facility to use offlined CPUs as slave CPUs Tomoki Sekiyama
2012-09-06 11:27 ` [RFC v2 PATCH 03/21] x86: Support hrtimer on " Tomoki Sekiyama
2012-09-06 11:27 ` [RFC v2 PATCH 04/21] x86: Avoid RCU warnings " Tomoki Sekiyama
2012-09-20 17:34   ` Paul E. McKenney
2012-09-28  8:10     ` Tomoki Sekiyama
2012-09-06 11:27 ` [RFC v2 PATCH 05/21] KVM: Enable/Disable virtualization on slave CPUs are activated/dying Tomoki Sekiyama
2012-09-06 11:27 ` [RFC v2 PATCH 06/21] KVM: Add facility to run guests on slave CPUs Tomoki Sekiyama
2012-09-06 11:27 ` [RFC v2 PATCH 07/21] KVM: handle page faults of slave guests on online CPUs Tomoki Sekiyama
2012-09-06 11:28 ` [RFC v2 PATCH 08/21] KVM: Add KVM_GET_SLAVE_CPU and KVM_SET_SLAVE_CPU to vCPU ioctl Tomoki Sekiyama
2012-09-06 11:28 ` [RFC v2 PATCH 09/21] KVM: Go back to online CPU on VM exit by external interrupt Tomoki Sekiyama
2012-09-06 11:28 ` [RFC v2 PATCH 10/21] KVM: proxy slab operations for slave CPUs on online CPUs Tomoki Sekiyama
2012-09-06 11:28 ` [RFC v2 PATCH 11/21] KVM: no exiting from guest when slave CPU halted Tomoki Sekiyama
2012-09-06 11:28 ` [RFC v2 PATCH 12/21] x86/apic: Enable external interrupt routing to slave CPUs Tomoki Sekiyama
2012-09-06 11:28 ` [RFC v2 PATCH 13/21] x86/apic: IRQ vector remapping on slave for " Tomoki Sekiyama
2012-09-06 11:28 ` [RFC v2 PATCH 14/21] KVM: Directly handle interrupts by guests without VM EXIT on " Tomoki Sekiyama
2012-09-06 11:28 ` Tomoki Sekiyama [this message]
2012-09-06 11:28 ` [RFC v2 PATCH 16/21] KVM: vmx: Add definitions PIN_BASED_PREEMPTION_TIMER Tomoki Sekiyama
2012-09-06 11:28 ` [RFC v2 PATCH 17/21] KVM: add kvm_arch_vcpu_prevent_run to prevent VM ENTER when NMI is received Tomoki Sekiyama
2012-09-06 11:28 ` [RFC v2 PATCH 18/21] KVM: route assigned devices' MSI/MSI-X directly to guests on slave CPUs Tomoki Sekiyama
2012-09-06 11:28 ` [RFC v2 PATCH 19/21] KVM: Enable direct EOI for directly routed interrupts to guests Tomoki Sekiyama
2012-09-06 11:29 ` [RFC v2 PATCH 20/21] KVM: Pass-through local APIC timer of on slave CPUs to guest VM Tomoki Sekiyama
2012-09-06 11:29 ` [RFC v2 PATCH 21/21] x86: request TLB flush to slave CPU using NMI Tomoki Sekiyama
2012-09-06 11:46 ` [RFC v2 PATCH 00/21] KVM: x86: CPU isolation and direct interrupts delivery to guests Avi Kivity
2012-09-07  8:26 ` Jan Kiszka
2012-09-10 11:36   ` Tomoki Sekiyama

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