From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751390AbeCIJJg (ORCPT ); Fri, 9 Mar 2018 04:09:36 -0500 Received: from terminus.zytor.com ([198.137.202.136]:38403 "EHLO terminus.zytor.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751019AbeCIJJe (ORCPT ); Fri, 9 Mar 2018 04:09:34 -0500 Date: Fri, 9 Mar 2018 01:09:12 -0800 From: tip-bot for Kan Liang Message-ID: Cc: torvalds@linux-foundation.org, mingo@kernel.org, kan.liang@linux.intel.com, eranian@google.com, peterz@infradead.org, alexander.shishkin@linux.intel.com, acme@redhat.com, tglx@linutronix.de, hpa@zytor.com, jolsa@redhat.com, linux-kernel@vger.kernel.org, vincent.weaver@maine.edu Reply-To: peterz@infradead.org, eranian@google.com, acme@redhat.com, alexander.shishkin@linux.intel.com, jolsa@redhat.com, tglx@linutronix.de, hpa@zytor.com, vincent.weaver@maine.edu, linux-kernel@vger.kernel.org, mingo@kernel.org, kan.liang@linux.intel.com, torvalds@linux-foundation.org In-Reply-To: <1518474035-21006-3-git-send-email-kan.liang@linux.intel.com> References: <1518474035-21006-3-git-send-email-kan.liang@linux.intel.com> To: linux-tip-commits@vger.kernel.org Subject: [tip:perf/core] perf/x86: Introduce a ->read() callback in 'struct x86_pmu' Git-Commit-ID: bcfbe5c41d630ce6b74da45134cea484248b515a X-Mailer: tip-git-log-daemon Robot-ID: Robot-Unsubscribe: Contact to get blacklisted from these emails MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Content-Type: text/plain; charset=UTF-8 Content-Disposition: inline Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Commit-ID: bcfbe5c41d630ce6b74da45134cea484248b515a Gitweb: https://git.kernel.org/tip/bcfbe5c41d630ce6b74da45134cea484248b515a Author: Kan Liang AuthorDate: Mon, 12 Feb 2018 14:20:32 -0800 Committer: Ingo Molnar CommitDate: Fri, 9 Mar 2018 08:22:20 +0100 perf/x86: Introduce a ->read() callback in 'struct x86_pmu' Auto-reload needs to be specially handled when reading event counts. Signed-off-by: Kan Liang Signed-off-by: Peter Zijlstra (Intel) Cc: Alexander Shishkin Cc: Arnaldo Carvalho de Melo Cc: Jiri Olsa Cc: Linus Torvalds Cc: Peter Zijlstra Cc: Stephane Eranian Cc: Thomas Gleixner Cc: Vince Weaver Cc: acme@kernel.org Link: http://lkml.kernel.org/r/1518474035-21006-3-git-send-email-kan.liang@linux.intel.com Signed-off-by: Ingo Molnar --- arch/x86/events/core.c | 2 ++ arch/x86/events/perf_event.h | 1 + 2 files changed, 3 insertions(+) diff --git a/arch/x86/events/core.c b/arch/x86/events/core.c index 5a3ccd1715e2..00a6251981d2 100644 --- a/arch/x86/events/core.c +++ b/arch/x86/events/core.c @@ -1881,6 +1881,8 @@ 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); } diff --git a/arch/x86/events/perf_event.h b/arch/x86/events/perf_event.h index 6495ffd57e3e..d445f0026989 100644 --- a/arch/x86/events/perf_event.h +++ b/arch/x86/events/perf_event.h @@ -520,6 +520,7 @@ 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;