linux-kernel - [tip:x86/hyperv] x86/hyper-v: Trace PV IPI send

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Date:   Tue, 3 Jul 2018 00:05:25 -0700
From:   tip-bot for Vitaly Kuznetsov <tipbot@...or.com>
To:     linux-tip-commits@...r.kernel.org
Cc:     haiyangz@...rosoft.com, Michael.H.Kelley@...rosoft.com,
        kys@...rosoft.com, vkuznets@...hat.com, sthemmin@...rosoft.com,
        Tianyu.Lan@...rosoft.com, linux-kernel@...r.kernel.org,
        mingo@...nel.org, hpa@...or.com, tglx@...utronix.de
Subject: [tip:x86/hyperv] x86/hyper-v: Trace PV IPI send

Commit-ID:  58ec5e9c9044bd7e1c0bcc6ad822b2e909f49732
Gitweb:     https://git.kernel.org/tip/58ec5e9c9044bd7e1c0bcc6ad822b2e909f49732
Author:     Vitaly Kuznetsov <vkuznets@...hat.com>
AuthorDate: Fri, 22 Jun 2018 19:06:25 +0200
Committer:  Thomas Gleixner <tglx@...utronix.de>
CommitDate: Tue, 3 Jul 2018 09:00:34 +0200

x86/hyper-v: Trace PV IPI send

Trace Hyper-V PV IPIs the same way we do PV TLB flush.

Signed-off-by: Vitaly Kuznetsov <vkuznets@...hat.com>
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
Cc: devel@...uxdriverproject.org
Cc: "K. Y. Srinivasan" <kys@...rosoft.com>
Cc: Haiyang Zhang <haiyangz@...rosoft.com>
Cc: Stephen Hemminger <sthemmin@...rosoft.com>
Cc: "H. Peter Anvin" <hpa@...or.com>
Cc: Tianyu Lan <Tianyu.Lan@...rosoft.com>
Cc: "Michael Kelley (EOSG)" <Michael.H.Kelley@...rosoft.com>
Link: https://lkml.kernel.org/r/20180622170625.30688-5-vkuznets@redhat.com

---
 arch/x86/hyperv/hv_apic.c           |  4 ++++
 arch/x86/include/asm/trace/hyperv.h | 15 +++++++++++++++
 2 files changed, 19 insertions(+)

diff --git a/arch/x86/hyperv/hv_apic.c b/arch/x86/hyperv/hv_apic.c
index ee962784d25b..657a2b8c738a 100644
--- a/arch/x86/hyperv/hv_apic.c
+++ b/arch/x86/hyperv/hv_apic.c
@@ -31,6 +31,8 @@
 #include <asm/mshyperv.h>
 #include <asm/apic.h>
 
+#include <asm/trace/hyperv.h>
+
 static struct apic orig_apic;
 
 static u64 hv_apic_icr_read(void)
@@ -134,6 +136,8 @@ static bool __send_ipi_mask(const struct cpumask *mask, int vector)
 	struct ipi_arg_non_ex ipi_arg;
 	int ret = 1;
 
+	trace_hyperv_send_ipi_mask(mask, vector);
+
 	if (cpumask_empty(mask))
 		return true;
 
diff --git a/arch/x86/include/asm/trace/hyperv.h b/arch/x86/include/asm/trace/hyperv.h
index 4253bca99989..9c0d4b588e3f 100644
--- a/arch/x86/include/asm/trace/hyperv.h
+++ b/arch/x86/include/asm/trace/hyperv.h
@@ -28,6 +28,21 @@ TRACE_EVENT(hyperv_mmu_flush_tlb_others,
 		      __entry->addr, __entry->end)
 	);
 
+TRACE_EVENT(hyperv_send_ipi_mask,
+	    TP_PROTO(const struct cpumask *cpus,
+		     int vector),
+	    TP_ARGS(cpus, vector),
+	    TP_STRUCT__entry(
+		    __field(unsigned int, ncpus)
+		    __field(int, vector)
+		    ),
+	    TP_fast_assign(__entry->ncpus = cpumask_weight(cpus);
+			   __entry->vector = vector;
+		    ),
+	    TP_printk("ncpus %d vector %x",
+		      __entry->ncpus, __entry->vector)
+	);
+
 #endif /* CONFIG_HYPERV */
 
 #undef TRACE_INCLUDE_PATH