From mboxrd@z Thu Jan 1 00:00:00 1970 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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id B5A6AC433EF for ; Wed, 27 Oct 2021 20:16:52 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id A10A46103C for ; Wed, 27 Oct 2021 20:16:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S240823AbhJ0UTR (ORCPT ); Wed, 27 Oct 2021 16:19:17 -0400 Received: from mail-oi1-f173.google.com ([209.85.167.173]:37754 "EHLO mail-oi1-f173.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S240671AbhJ0UTL (ORCPT ); Wed, 27 Oct 2021 16:19:11 -0400 Received: by mail-oi1-f173.google.com with SMTP id o83so5112182oif.4; Wed, 27 Oct 2021 13:16:46 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=XglJs1OrxOGXDZwQ6Z0xWT/fdEEcMb5WDcdtHAA51Ao=; b=3LUUhDrpVAIdEffQvEHKdYzu00qR+OQL2KM2+EqF3BPKf+jN+6KthuHdWNXih/0st6 1aYBv39CiO2OE94D6ZUghnnjlqdb1Mf+xkuAsNC/C3eRGgbei+6dY+M4+wZR/Cil+ogf pbuD5tn3GgjKNQtAb+AfrJAq4MUmHuORb7DxBotHbq4PbNlld9bu2zhz+mhfGzxyNiHO y/yWaNsnV0dQOzJgMhHZQaEjODg1KsqUm1ajSqsq7flV7mH23N/EeJNcBG+bpurMblfv /FZcIoIQEde1xFsSfRi0e+NW2/JkQdKz5+tWVgl9iawe9/jpQ/uz2ZSb/1zcZjS31ZT3 yMqQ== X-Gm-Message-State: AOAM53152eX+7P16EyTHyMI5trtb53NSVHdk9P7k1lskP0+7yJMrSkye 6qwzNN2GF62DhG+JKlYsKQ== X-Google-Smtp-Source: ABdhPJxX3AiZ/vuirHgymgSIPu02dS9OiXOc1XMBNH12+W2iAg30s4MUs+CWgL849GrCzTZnN0NyYw== X-Received: by 2002:a05:6808:238a:: with SMTP id bp10mr5367505oib.30.1635365805635; Wed, 27 Oct 2021 13:16:45 -0700 (PDT) Received: from xps15.herring.priv (66-90-148-213.dyn.grandenetworks.net. [66.90.148.213]) by smtp.googlemail.com with ESMTPSA id f10sm415332otc.26.2021.10.27.13.16.44 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 27 Oct 2021 13:16:45 -0700 (PDT) From: Rob Herring To: Will Deacon , Mark Rutland , Peter Zijlstra Cc: Jonathan Corbet , Catalin Marinas , Ingo Molnar , Arnaldo Carvalho de Melo , Alexander Shishkin , Jiri Olsa , Namhyung Kim , Thomas Gleixner , Borislav Petkov , x86@kernel.org, "H. Peter Anvin" , linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-perf-users@vger.kernel.org Subject: [PATCH v12 2/5] perf: Add a counter for number of user access events in context Date: Wed, 27 Oct 2021 15:16:38 -0500 Message-Id: <20211027201641.2076427-3-robh@kernel.org> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20211027201641.2076427-1-robh@kernel.org> References: <20211027201641.2076427-1-robh@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org For controlling user space counter access, we need to know if any event in a context (currently scheduled or not) is using user space counters. Walking the context's list of events would be slow, so add a counter to track this. Reviewed-by: Mark Rutland Signed-off-by: Rob Herring --- v10: - Re-added. - Maintain the count in the perf core v9: - Dropped v8: - new patch --- include/linux/perf_event.h | 1 + kernel/events/core.c | 4 ++++ 2 files changed, 5 insertions(+) diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h index 34ebcc9af608..d733cac749e2 100644 --- a/include/linux/perf_event.h +++ b/include/linux/perf_event.h @@ -828,6 +828,7 @@ struct perf_event_context { int nr_events; int nr_active; + int nr_user; int is_active; int nr_stat; int nr_freq; diff --git a/kernel/events/core.c b/kernel/events/core.c index 744e8726c5b2..01290d150da3 100644 --- a/kernel/events/core.c +++ b/kernel/events/core.c @@ -1808,6 +1808,8 @@ list_add_event(struct perf_event *event, struct perf_event_context *ctx) list_add_rcu(&event->event_entry, &ctx->event_list); ctx->nr_events++; + if (event->hw.flags & PERF_EVENT_FLAG_USER_READ_CNT) + ctx->nr_user++; if (event->attr.inherit_stat) ctx->nr_stat++; @@ -1999,6 +2001,8 @@ list_del_event(struct perf_event *event, struct perf_event_context *ctx) event->attach_state &= ~PERF_ATTACH_CONTEXT; ctx->nr_events--; + if (event->hw.flags & PERF_EVENT_FLAG_USER_READ_CNT) + ctx->nr_user--; if (event->attr.inherit_stat) ctx->nr_stat--; -- 2.32.0 From mboxrd@z Thu Jan 1 00:00:00 1970 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 mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 6C341C433F5 for ; Wed, 27 Oct 2021 20:18:20 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 31AA2610A6 for ; Wed, 27 Oct 2021 20:18:20 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 31AA2610A6 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=aOhVg4kPVOovXS7EUNytp/mLLCquH+ONIZ8eKzQfeSI=; b=eDrjIfDg5MTUyt Ut1XJRMAMEcgGoBjCiwuJO40H7EB+vbyGaUgS0S3fHuTj5bFxBvlKb9248plnkIMXOsH8iWpBCi9E HdtkaFstfthN//aIddwWm6VPBhK1uSfhBfsQR9xYPJrSFdukmGEpFbw8JGZMc24i8bBAb29hX11qE 3oN76veJc8vPVcu116nETYJaXmY0gzQZTeTqUpRt4HPo9BKnS/otJEQiQKBqbrC5NjB0WffiZdTur vszj6SCSyn6Zsm3gL3IcOylc+dZsvhoI/WJdzGc5zwgUWJ8Mb7YknvYwKSrinJq1oVRx8MqlC+L1L xehCfrzP0OrWWxsFVV/A==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.94.2 #2 (Red Hat Linux)) id 1mfpMF-0061TC-5M; Wed, 27 Oct 2021 20:17:11 +0000 Received: from mail-oi1-f180.google.com ([209.85.167.180]) by bombadil.infradead.org with esmtps (Exim 4.94.2 #2 (Red Hat Linux)) id 1mfpLq-0061L0-75 for linux-arm-kernel@lists.infradead.org; Wed, 27 Oct 2021 20:16:48 +0000 Received: by mail-oi1-f180.google.com with SMTP id o4so5070400oia.10 for ; Wed, 27 Oct 2021 13:16:46 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=XglJs1OrxOGXDZwQ6Z0xWT/fdEEcMb5WDcdtHAA51Ao=; b=KtSiCzBquaZ+wmWx6aFzAVXi+l8rahHFfeV6f4R5JZHGEVmPDXYInlgIJb+EBge/Ja LpY1ZOgLFBylIN8y2g8ivheLiz2ftZF4ISmWuYGYe8hkvfEe2zOjHgYW2TLZ8yIo3XSS ZRZGcJQtExC5hM1MkUW0nQwItp5Um5U6FLMElWAjBqo+mgWOAeoqYAVP/5WGFoikxyCM 3t/UZ4ZR3ttcZNHOn2RAdP+r4wUuSeliK7meonV8Atv7OmAZM/qZWnN81HoCtg39K0Gv IDoREi1030dWydfyVoDpD7Iy/TdLjGZiA5l3nznmdd8PQY6O9qj+u0MOlSa4gFytyI3a rmOQ== X-Gm-Message-State: AOAM533MBx9AoZxuP+0WqL4Ex3eWTAXHf/j9ByS3jZdKX6JJZ1sO00vT qAhGEziSopUWCPrYDzM7WQ== X-Google-Smtp-Source: ABdhPJxX3AiZ/vuirHgymgSIPu02dS9OiXOc1XMBNH12+W2iAg30s4MUs+CWgL849GrCzTZnN0NyYw== X-Received: by 2002:a05:6808:238a:: with SMTP id bp10mr5367505oib.30.1635365805635; Wed, 27 Oct 2021 13:16:45 -0700 (PDT) Received: from xps15.herring.priv (66-90-148-213.dyn.grandenetworks.net. [66.90.148.213]) by smtp.googlemail.com with ESMTPSA id f10sm415332otc.26.2021.10.27.13.16.44 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 27 Oct 2021 13:16:45 -0700 (PDT) From: Rob Herring To: Will Deacon , Mark Rutland , Peter Zijlstra Cc: Jonathan Corbet , Catalin Marinas , Ingo Molnar , Arnaldo Carvalho de Melo , Alexander Shishkin , Jiri Olsa , Namhyung Kim , Thomas Gleixner , Borislav Petkov , x86@kernel.org, "H. Peter Anvin" , linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-perf-users@vger.kernel.org Subject: [PATCH v12 2/5] perf: Add a counter for number of user access events in context Date: Wed, 27 Oct 2021 15:16:38 -0500 Message-Id: <20211027201641.2076427-3-robh@kernel.org> X-Mailer: git-send-email 2.32.0 In-Reply-To: <20211027201641.2076427-1-robh@kernel.org> References: <20211027201641.2076427-1-robh@kernel.org> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20211027_131646_282231_1305743D X-CRM114-Status: GOOD ( 15.50 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org For controlling user space counter access, we need to know if any event in a context (currently scheduled or not) is using user space counters. Walking the context's list of events would be slow, so add a counter to track this. Reviewed-by: Mark Rutland Signed-off-by: Rob Herring --- v10: - Re-added. - Maintain the count in the perf core v9: - Dropped v8: - new patch --- include/linux/perf_event.h | 1 + kernel/events/core.c | 4 ++++ 2 files changed, 5 insertions(+) diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h index 34ebcc9af608..d733cac749e2 100644 --- a/include/linux/perf_event.h +++ b/include/linux/perf_event.h @@ -828,6 +828,7 @@ struct perf_event_context { int nr_events; int nr_active; + int nr_user; int is_active; int nr_stat; int nr_freq; diff --git a/kernel/events/core.c b/kernel/events/core.c index 744e8726c5b2..01290d150da3 100644 --- a/kernel/events/core.c +++ b/kernel/events/core.c @@ -1808,6 +1808,8 @@ list_add_event(struct perf_event *event, struct perf_event_context *ctx) list_add_rcu(&event->event_entry, &ctx->event_list); ctx->nr_events++; + if (event->hw.flags & PERF_EVENT_FLAG_USER_READ_CNT) + ctx->nr_user++; if (event->attr.inherit_stat) ctx->nr_stat++; @@ -1999,6 +2001,8 @@ list_del_event(struct perf_event *event, struct perf_event_context *ctx) event->attach_state &= ~PERF_ATTACH_CONTEXT; ctx->nr_events--; + if (event->hw.flags & PERF_EVENT_FLAG_USER_READ_CNT) + ctx->nr_user--; if (event->attr.inherit_stat) ctx->nr_stat--; -- 2.32.0 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel