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From: Maxim Levitsky <mlevitsk@redhat.com>
To: kvm@vger.kernel.org
Cc: linux-kernel@vger.kernel.org (open list:X86 ARCHITECTURE (32-BIT
	AND 64-BIT)), Wanpeng Li <wanpengli@tencent.com>,
	Dave Hansen <dave.hansen@linux.intel.com>,
	Joerg Roedel <joro@8bytes.org>, "H. Peter Anvin" <hpa@zytor.com>,
	Paolo Bonzini <pbonzini@redhat.com>,
	Vitaly Kuznetsov <vkuznets@redhat.com>,
	Borislav Petkov <bp@alien8.de>,
	x86@kernel.org (maintainer:X86 ARCHITECTURE (32-BIT AND 64-BIT)),
	Ingo Molnar <mingo@redhat.com>,
	Thomas Gleixner <tglx@linutronix.de>,
	Jim Mattson <jmattson@google.com>,
	Sean Christopherson <seanjc@google.com>,
	Maxim Levitsky <mlevitsk@redhat.com>
Subject: [PATCH 2/6] KVM: x86: add a tracepoint for APICv/AVIC interrupt delivery
Date: Thu,  9 Dec 2021 13:54:36 +0200	[thread overview]
Message-ID: <20211209115440.394441-3-mlevitsk@redhat.com> (raw)
In-Reply-To: <20211209115440.394441-1-mlevitsk@redhat.com>

This allows to see how many interrupts were delivered via the
APICv/AVIC from the host.

Signed-off-by: Maxim Levitsky <mlevitsk@redhat.com>
---
 arch/x86/kvm/lapic.c |  3 +++
 arch/x86/kvm/trace.h | 24 ++++++++++++++++++++++++
 arch/x86/kvm/x86.c   |  1 +
 3 files changed, 28 insertions(+)

diff --git a/arch/x86/kvm/lapic.c b/arch/x86/kvm/lapic.c
index 40270d7bc597..c5028e6b0f96 100644
--- a/arch/x86/kvm/lapic.c
+++ b/arch/x86/kvm/lapic.c
@@ -1100,6 +1100,9 @@ static int __apic_accept_irq(struct kvm_lapic *apic, int delivery_mode,
 			kvm_lapic_set_irr(vector, apic);
 			kvm_make_request(KVM_REQ_EVENT, vcpu);
 			kvm_vcpu_kick(vcpu);
+		} else {
+			trace_kvm_apicv_accept_irq(vcpu->vcpu_id, delivery_mode,
+						   trig_mode, vector);
 		}
 		break;
 
diff --git a/arch/x86/kvm/trace.h b/arch/x86/kvm/trace.h
index 953b0fcb21ee..92e6f6702f00 100644
--- a/arch/x86/kvm/trace.h
+++ b/arch/x86/kvm/trace.h
@@ -1356,6 +1356,30 @@ TRACE_EVENT(kvm_apicv_update_request,
 		  __entry->bit)
 );
 
+TRACE_EVENT(kvm_apicv_accept_irq,
+	    TP_PROTO(__u32 apicid, __u16 dm, __u16 tm, __u8 vec),
+	    TP_ARGS(apicid, dm, tm, vec),
+
+	TP_STRUCT__entry(
+		__field(	__u32,		apicid		)
+		__field(	__u16,		dm		)
+		__field(	__u16,		tm		)
+		__field(	__u8,		vec		)
+	),
+
+	TP_fast_assign(
+		__entry->apicid		= apicid;
+		__entry->dm		= dm;
+		__entry->tm		= tm;
+		__entry->vec		= vec;
+	),
+
+	TP_printk("apicid %x vec %u (%s|%s)",
+		  __entry->apicid, __entry->vec,
+		  __print_symbolic((__entry->dm >> 8 & 0x7), kvm_deliver_mode),
+		  __entry->tm ? "level" : "edge")
+);
+
 /*
  * Tracepoint for AMD AVIC
  */
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 1aaf37e1bd0f..26cb3a4cd0e9 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -12693,6 +12693,7 @@ EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_avic_unaccelerated_access);
 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_avic_incomplete_ipi);
 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_avic_ga_log);
 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_apicv_update_request);
+EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_apicv_accept_irq);
 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_vmgexit_enter);
 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_vmgexit_exit);
 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_vmgexit_msr_protocol_enter);
-- 
2.26.3


  parent reply	other threads:[~2021-12-09 11:55 UTC|newest]

Thread overview: 21+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-12-09 11:54 [PATCH 0/6] RFC: KVM: SVM: Allow L1's AVIC to co-exist with nesting Maxim Levitsky
2021-12-09 11:54 ` [PATCH 1/6] KVM: SVM: allow to force AVIC to be enabled Maxim Levitsky
2021-12-09 11:54 ` Maxim Levitsky [this message]
2021-12-09 11:54 ` [PATCH 3/6] KVM: SVM: fix AVIC race of host->guest IPI delivery vs AVIC inhibition Maxim Levitsky
2021-12-09 14:11   ` Paolo Bonzini
2021-12-09 14:26     ` Maxim Levitsky
2021-12-09 15:27       ` Sean Christopherson
2021-12-09 15:33         ` Maxim Levitsky
2021-12-09 15:35           ` Maxim Levitsky
2021-12-09 11:54 ` [PATCH 4/6] KVM: SVM: fix races in the AVIC incomplete IPI delivery to vCPUs Maxim Levitsky
2021-12-09 15:38   ` Sean Christopherson
2021-12-10 11:37     ` Paolo Bonzini
2021-12-09 11:54 ` [PATCH 5/6] KVM: x86: never clear irr_pending in kvm_apic_update_apicv Maxim Levitsky
2021-12-09 14:12   ` Paolo Bonzini
2021-12-09 15:03     ` Maxim Levitsky
2021-12-10 12:07   ` Paolo Bonzini
2021-12-10 12:20     ` Maxim Levitsky
2021-12-10 12:47       ` Maxim Levitsky
2021-12-10 13:03         ` Paolo Bonzini
2021-12-10 13:10           ` Maxim Levitsky
2021-12-09 11:54 ` [PATCH 6/6] KVM: SVM: allow AVIC to co-exist with a nested guest running Maxim Levitsky

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