From: Xiaoyao Li <xiaoyao.li@intel.com>
To: Peter Zijlstra <peterz@infradead.org>,
Ingo Molnar <mingo@redhat.com>,
Arnaldo Carvalho de Melo <acme@kernel.org>,
Mark Rutland <mark.rutland@arm.com>,
Alexander Shishkin <alexander.shishkin@linux.intel.com>,
Jiri Olsa <jolsa@kernel.org>, Namhyung Kim <namhyung@kernel.org>,
Sean Christopherson <seanjc@google.com>,
Paolo Bonzini <pbonzini@redhat.com>,
wei.w.wang@intel.com, kan.liang@linux.intel.com
Cc: xiaoyao.li@intel.com, linux-perf-users@vger.kernel.org,
linux-kernel@vger.kernel.org, kvm@vger.kernel.org
Subject: [RFC PATCH v2 1/3] perf/core: Expose perf_event_{en,dis}able_local()
Date: Thu, 22 Sep 2022 00:45:19 +0800 [thread overview]
Message-ID: <20220921164521.2858932-2-xiaoyao.li@intel.com> (raw)
In-Reply-To: <20220921164521.2858932-1-xiaoyao.li@intel.com>
KVM needs them to disable/enable an Intel PT perf event before
vm-entry/after vm-exit.
Signed-off-by: Xiaoyao Li <xiaoyao.li@intel.com>
---
include/linux/perf_event.h | 1 +
kernel/events/core.c | 7 +++++++
2 files changed, 8 insertions(+)
diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h
index ee8b9ecdc03b..fc5f3952d6a2 100644
--- a/include/linux/perf_event.h
+++ b/include/linux/perf_event.h
@@ -1472,6 +1472,7 @@ extern int perf_swevent_get_recursion_context(void);
extern void perf_swevent_put_recursion_context(int rctx);
extern u64 perf_swevent_set_period(struct perf_event *event);
extern void perf_event_enable(struct perf_event *event);
+extern void perf_event_enable_local(struct perf_event *event);
extern void perf_event_disable(struct perf_event *event);
extern void perf_event_disable_local(struct perf_event *event);
extern void perf_event_disable_inatomic(struct perf_event *event);
diff --git a/kernel/events/core.c b/kernel/events/core.c
index 2621fd24ad26..8324bb99c6bf 100644
--- a/kernel/events/core.c
+++ b/kernel/events/core.c
@@ -2446,6 +2446,7 @@ void perf_event_disable_local(struct perf_event *event)
{
event_function_local(event, __perf_event_disable, NULL);
}
+EXPORT_SYMBOL_GPL(perf_event_disable_local);
/*
* Strictly speaking kernel users cannot create groups and therefore this
@@ -2984,6 +2985,12 @@ static void _perf_event_enable(struct perf_event *event)
event_function_call(event, __perf_event_enable, NULL);
}
+void perf_event_enable_local(struct perf_event *event)
+{
+ event_function_local(event, __perf_event_enable, NULL);
+}
+EXPORT_SYMBOL_GPL(perf_event_enable_local);
+
/*
* See perf_event_disable();
*/
--
2.27.0
next prev parent reply other threads:[~2022-09-21 16:50 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-09-21 16:45 [RFC PATCH v2 0/3] KVM: VMX: Fix VM entry failure on PT_MODE_HOST_GUEST while host is using PT Xiaoyao Li
2022-09-21 16:45 ` Xiaoyao Li [this message]
2022-09-22 12:16 ` [RFC PATCH v2 1/3] perf/core: Expose perf_event_{en,dis}able_local() Wang, Wei W
2022-09-21 16:45 ` [RFC PATCH v2 2/3] perf/x86/intel/pt: Introduce and export pt_get_curr_event() Xiaoyao Li
2022-09-22 5:14 ` Xiaoyao Li
2022-09-22 12:33 ` Liang, Kan
2022-09-22 12:58 ` Wang, Wei W
2022-09-22 13:34 ` Peter Zijlstra
2022-09-22 13:59 ` Wang, Wei W
2022-09-22 14:09 ` Peter Zijlstra
2022-09-22 14:42 ` Wang, Wei W
2022-09-26 15:48 ` Liang, Kan
2022-09-26 17:24 ` Jim Mattson
2022-09-26 18:08 ` Liang, Kan
2022-09-27 14:27 ` Wang, Wei W
2022-09-27 16:52 ` Liang, Kan
2022-09-26 15:32 ` Liang, Kan
2022-09-21 16:45 ` [RFC PATCH v2 3/3] KVM: VMX: Stop/resume host PT before/after VMX transition when PT_MODE_HOST_GUEST Xiaoyao Li
2022-09-22 12:34 ` Wang, Wei W
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