linux-kernel - [PATCH v4 05/17] kvm: x86: Add APICv activate/deactivate request trace points

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Date:   Fri, 1 Nov 2019 22:41:28 +0000
From:   "Suthikulpanit, Suravee" <Suravee.Suthikulpanit@....com>
To:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "kvm@...r.kernel.org" <kvm@...r.kernel.org>
CC:     "pbonzini@...hat.com" <pbonzini@...hat.com>,
        "rkrcmar@...hat.com" <rkrcmar@...hat.com>,
        "joro@...tes.org" <joro@...tes.org>,
        "vkuznets@...hat.com" <vkuznets@...hat.com>,
        "rkagan@...tuozzo.com" <rkagan@...tuozzo.com>,
        "graf@...zon.com" <graf@...zon.com>,
        "jschoenh@...zon.de" <jschoenh@...zon.de>,
        "karahmed@...zon.de" <karahmed@...zon.de>,
        "rimasluk@...zon.com" <rimasluk@...zon.com>,
        "Grimm, Jon" <Jon.Grimm@....com>,
        "Suthikulpanit, Suravee" <Suravee.Suthikulpanit@....com>
Subject: [PATCH v4 05/17] kvm: x86: Add APICv activate/deactivate request
 trace points

Add trace points when sending request to activate/deactivate APICv.

Suggested-by: Alexander Graf <graf@...zon.com>
Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@....com>
---
 arch/x86/kvm/trace.h | 19 +++++++++++++++++++
 arch/x86/kvm/x86.c   |  2 ++
 2 files changed, 21 insertions(+)

diff --git a/arch/x86/kvm/trace.h b/arch/x86/kvm/trace.h
index b5c831e..3bfc6b5 100644
--- a/arch/x86/kvm/trace.h
+++ b/arch/x86/kvm/trace.h
@@ -1297,6 +1297,25 @@
 		  __entry->vcpu_id, __entry->timer_index)
 );
 
+TRACE_EVENT(kvm_apicv_update_request,
+	    TP_PROTO(bool activate, unsigned long bit),
+	    TP_ARGS(activate, bit),
+
+	TP_STRUCT__entry(
+		__field(bool, activate)
+		__field(unsigned long, bit)
+	),
+
+	TP_fast_assign(
+		__entry->activate = activate;
+		__entry->bit = bit;
+	),
+
+	TP_printk("%s bit=%lu",
+		  __entry->activate ? "activate" : "deactivate",
+		  __entry->bit)
+);
+
 /*
  * Tracepoint for AMD AVIC
  */
diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
index 394695a..4fab93e 100644
--- a/arch/x86/kvm/x86.c
+++ b/arch/x86/kvm/x86.c
@@ -7754,6 +7754,7 @@ void kvm_request_apicv_update(struct kvm *kvm, bool activate, ulong bit)
 			return;
 	}
 
+	trace_kvm_apicv_update_request(activate, bit);
 	kvm_make_all_cpus_request(kvm, KVM_REQ_APICV_UPDATE);
 }
 EXPORT_SYMBOL_GPL(kvm_request_apicv_update);
@@ -10145,3 +10146,4 @@ bool kvm_arch_no_poll(struct kvm_vcpu *vcpu)
 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_pi_irte_update);
 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_avic_unaccelerated_access);
 EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_avic_incomplete_ipi);
+EXPORT_TRACEPOINT_SYMBOL_GPL(kvm_apicv_update_request);
-- 
1.8.3.1