From patchwork Mon Jan 7 16:27:22 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andrew Murray X-Patchwork-Id: 10750801 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id DFB28746 for ; Mon, 7 Jan 2019 16:29:07 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id CCD951FFB2 for ; Mon, 7 Jan 2019 16:29:07 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id C076E2022C; Mon, 7 Jan 2019 16:29:07 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.2 required=2.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,MAILING_LIST_MULTI,RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 40BBF1FFCA for ; Mon, 7 Jan 2019 16:29:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:MIME-Version:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id:References: In-Reply-To:Message-Id:Date:Subject:To:From:Reply-To:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Owner; bh=LpI/OE9zSWHFwHFx+koripRHTuFPxgoYJipd32TywAQ=; b=daw4YUmv+n2GJ6AZCYRH2Z9Gpg miX65seIp8iF1kVpfakRaAnOrdqejjHE1CMjaFaBbxxN5HvYIn0tgxe5yi91BWKHuzErovamIlMb+ SULrbibTw7saUsDVgDd4s5lKaFcHabnL2I9WqceK1WL3iG3kwSGkjrA7oqIXGgPNsJiWk6OCqQZ9n FcUakk6bae6GEHH5nbjActlI8eOX+rmKZPW4Ixp1ratRdYyvw98xV14g//HUkqgQ51uBAPDl6sn3c jak0mvA4SsYFjMCVAZrKabSn304Si5if1Z8uoV7qclEOMlp+c4tkEEZBCO2voQNvykN7UzNsp2qfg QSLbiNFg==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1ggXlu-0004ZS-Bf; Mon, 07 Jan 2019 16:29:02 +0000 Received: from foss.arm.com ([217.140.101.70]) by bombadil.infradead.org with esmtp (Exim 4.90_1 #2 (Red Hat Linux)) id 1ggXkz-0003WR-LV for linux-arm-kernel@lists.infradead.org; Mon, 07 Jan 2019 16:28:27 +0000 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.72.51.249]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 220801596; Mon, 7 Jan 2019 08:28:05 -0800 (PST) Received: from e119886-lin.cambridge.arm.com (unknown [10.37.6.11]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id A181B3F5A0; Mon, 7 Jan 2019 08:28:00 -0800 (PST) From: Andrew Murray To: Peter Zijlstra , Ingo Molnar , Arnaldo Carvalho de Melo , Richard Henderson , Ivan Kokshaysky , Matt Turner , Will Deacon , Mark Rutland , Shawn Guo , Sascha Hauer , Benjamin Herrenschmidt , Paul Mackerras , Thomas Gleixner , Borislav Petkov , Russell King , suzuki.poulose@arm.com, robin.murphy@arm.com, Michael Ellerman Subject: [PATCH v4 05/13] arm: perf: conditionally use PERF_PMU_CAP_NO_EXCLUDE Date: Mon, 7 Jan 2019 16:27:22 +0000 Message-Id: <1546878450-20341-6-git-send-email-andrew.murray@arm.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1546878450-20341-1-git-send-email-andrew.murray@arm.com> References: <1546878450-20341-1-git-send-email-andrew.murray@arm.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20190107_082806_397759_44244EC2 X-CRM114-Status: GOOD ( 13.70 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: x86@kernel.org, linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-alpha@vger.kernel.org MIME-Version: 1.0 Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP The ARM PMU driver can be used to represent a variety of ARM based PMUs. Some of these PMUs do not provide support for context exclusion, where this is the case we advertise the PERF_PMU_CAP_NO_EXCLUDE capability to ensure that perf prevents us from handling events where any exclusion flags are set. Signed-off-by: Andrew Murray Acked-by: Will Deacon --- drivers/perf/arm_pmu.c | 15 +++++---------- 1 file changed, 5 insertions(+), 10 deletions(-) diff --git a/drivers/perf/arm_pmu.c b/drivers/perf/arm_pmu.c index d0b7dd8..eec75b9 100644 --- a/drivers/perf/arm_pmu.c +++ b/drivers/perf/arm_pmu.c @@ -357,13 +357,6 @@ static irqreturn_t armpmu_dispatch_irq(int irq, void *dev) } static int -event_requires_mode_exclusion(struct perf_event_attr *attr) -{ - return attr->exclude_idle || attr->exclude_user || - attr->exclude_kernel || attr->exclude_hv; -} - -static int __hw_perf_event_init(struct perf_event *event) { struct arm_pmu *armpmu = to_arm_pmu(event->pmu); @@ -393,9 +386,8 @@ __hw_perf_event_init(struct perf_event *event) /* * Check whether we need to exclude the counter from certain modes. */ - if ((!armpmu->set_event_filter || - armpmu->set_event_filter(hwc, &event->attr)) && - event_requires_mode_exclusion(&event->attr)) { + if (armpmu->set_event_filter && + armpmu->set_event_filter(hwc, &event->attr)) { pr_debug("ARM performance counters do not support " "mode exclusion\n"); return -EOPNOTSUPP; @@ -867,6 +859,9 @@ int armpmu_register(struct arm_pmu *pmu) if (ret) return ret; + if (!pmu->set_event_filter) + pmu->pmu.capabilities |= PERF_PMU_CAP_NO_EXCLUDE; + ret = perf_pmu_register(&pmu->pmu, pmu->name, -1); if (ret) goto out_destroy;