From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S965071AbdLRTrL (ORCPT ); Mon, 18 Dec 2017 14:47:11 -0500 Received: from mga07.intel.com ([134.134.136.100]:37660 "EHLO mga07.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758963AbdLRTrB (ORCPT ); Mon, 18 Dec 2017 14:47:01 -0500 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.45,423,1508828400"; d="scan'208";a="13375761" From: kan.liang@linux.intel.com To: peterz@infradead.org, mingo@redhat.com, acme@kernel.org, linux-kernel@vger.kernel.org Cc: tglx@linutronix.de, jolsa@redhat.com, eranian@google.com, ak@linux.intel.com, Kan Liang Subject: [PATCH 3/4] perf/x86: introduce read function for x86_pmu Date: Mon, 18 Dec 2017 03:34:50 -0800 Message-Id: <1513596891-12362-4-git-send-email-kan.liang@linux.intel.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1513596891-12362-1-git-send-email-kan.liang@linux.intel.com> References: <1513596891-12362-1-git-send-email-kan.liang@linux.intel.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Kan Liang Large PEBS need to be specially handled in event count read. Signed-off-by: Kan Liang --- arch/x86/events/core.c | 3 +++ arch/x86/events/perf_event.h | 1 + 2 files changed, 4 insertions(+) diff --git a/arch/x86/events/core.c b/arch/x86/events/core.c index f74e21d..c781497 100644 --- a/arch/x86/events/core.c +++ b/arch/x86/events/core.c @@ -1899,6 +1899,9 @@ early_initcall(init_hw_perf_events); static inline void x86_pmu_read(struct perf_event *event) { + if (x86_pmu.read) + return x86_pmu.read(event); + x86_perf_event_update(event, 0, 0); } diff --git a/arch/x86/events/perf_event.h b/arch/x86/events/perf_event.h index fabb8b3..3a7a2e7 100644 --- a/arch/x86/events/perf_event.h +++ b/arch/x86/events/perf_event.h @@ -534,6 +534,7 @@ struct x86_pmu { void (*disable)(struct perf_event *); void (*add)(struct perf_event *); void (*del)(struct perf_event *); + void (*read)(struct perf_event *event); int (*hw_config)(struct perf_event *event); int (*schedule_events)(struct cpu_hw_events *cpuc, int n, int *assign); unsigned eventsel; -- 2.7.4