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

tip-bot for Vitaly Kuznetsov
2018-07-03T07:05:44Z

Commit-ID: 58ec5e9c9044bd7e1c0bcc6ad822b2e909f49732
Gitweb: https://git.kernel.org/tip/58ec5e9c9044bd7e1c0bcc6ad822b2e909f49732
Author: Vitaly Kuznetsov <vkuznets@redhat.com>
AuthorDate: Fri, 22 Jun 2018 19:06:25 +0200
Committer: Thomas Gleixner <tglx@linutronix.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@redhat.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: devel@linuxdriverproject.org
Cc: "K. Y. Srinivasan" <kys@microsoft.com>
Cc: Haiyang Zhang <haiyangz@microsoft.com>
Cc: Stephen Hemminger <sthemmin@microsoft.com>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Tianyu Lan <Tianyu.Lan@microsoft.com>
Cc: "Michael Kelley (EOSG)" <Michael.H.Kelley@microsoft.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