From patchwork Wed Sep 21 16:45:19 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Xiaoyao Li X-Patchwork-Id: 12983987 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id D1B6FC6FA8B for ; Wed, 21 Sep 2022 16:50:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231843AbiIUQun (ORCPT ); Wed, 21 Sep 2022 12:50:43 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51848 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S231473AbiIUQuR (ORCPT ); Wed, 21 Sep 2022 12:50:17 -0400 Received: from mga14.intel.com (mga14.intel.com [192.55.52.115]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 3C92851425; Wed, 21 Sep 2022 09:45:32 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1663778732; x=1695314732; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=9Rh9QI5021plHVnKQ/4sO96yjSHLmYjQeIDsxL6/qIg=; b=N2bg2b5z8Q+pTVO5IGXSgMvzrqOhGDw/WxwzPQqvi/BIFK2UGNBoDz/c a9SUXZGQx9++EaQ2JiwkHHu3cpLw5XRrnINy/spVuxxEP3/M5I3iJ9GKS TgqPeIImQOrQ85H02NBoKanu6yBb1jAP43xtltuV7QAJ4ZzUqGOosPCpt hPPQyT/qaMuEEE1DfkeP9v3QE7WhPc70TKwEybPAa+BEOQFXWIeBMMvVe 6umASJYVRbx+VnOyUWVnEvsKa/COd5uqeJ6ONmFJQvc6WNG8gBcDvRdxH vC7C7Jk3IW9XgYtuFUvssROzredkCK+bJjT22s6TyXJ5LimYZtqXvHwVS A==; X-IronPort-AV: E=McAfee;i="6500,9779,10477"; a="300044923" X-IronPort-AV: E=Sophos;i="5.93,333,1654585200"; d="scan'208";a="300044923" Received: from fmsmga005.fm.intel.com ([10.253.24.32]) by fmsmga103.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 21 Sep 2022 09:45:28 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.93,333,1654585200"; d="scan'208";a="948227915" Received: from lxy-dell.sh.intel.com ([10.239.48.38]) by fmsmga005.fm.intel.com with ESMTP; 21 Sep 2022 09:45:25 -0700 From: Xiaoyao Li To: Peter Zijlstra , Ingo Molnar , Arnaldo Carvalho de Melo , Mark Rutland , Alexander Shishkin , Jiri Olsa , Namhyung Kim , Sean Christopherson , Paolo Bonzini , 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 Message-Id: <20220921164521.2858932-2-xiaoyao.li@intel.com> X-Mailer: git-send-email 2.27.0 In-Reply-To: <20220921164521.2858932-1-xiaoyao.li@intel.com> References: <20220921164521.2858932-1-xiaoyao.li@intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org KVM needs them to disable/enable an Intel PT perf event before vm-entry/after vm-exit. Signed-off-by: Xiaoyao Li --- 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(); */