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 gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 37AFCC87FCF for ; Wed, 13 Aug 2025 17:01:40 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id BCD4510E777; Wed, 13 Aug 2025 17:01:39 +0000 (UTC) Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by gabe.freedesktop.org (Postfix) with ESMTP id 19C9810E786; Wed, 13 Aug 2025 17:01:39 +0000 (UTC) Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 901F71BD0; Wed, 13 Aug 2025 10:01:30 -0700 (PDT) Received: from e121345-lin.cambridge.arm.com (e121345-lin.cambridge.arm.com [10.1.196.50]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id 776713F738; Wed, 13 Aug 2025 10:01:34 -0700 (PDT) From: Robin Murphy To: peterz@infradead.org, mingo@redhat.com, will@kernel.org, mark.rutland@arm.com, acme@kernel.org, namhyung@kernel.org, alexander.shishkin@linux.intel.com, jolsa@kernel.org, irogers@google.com, adrian.hunter@intel.com, kan.liang@linux.intel.com Cc: linux-perf-users@vger.kernel.org, linux-kernel@vger.kernel.org, linux-alpha@vger.kernel.org, linux-snps-arc@lists.infradead.org, linux-arm-kernel@lists.infradead.org, imx@lists.linux.dev, linux-csky@vger.kernel.org, loongarch@lists.linux.dev, linux-mips@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, sparclinux@vger.kernel.org, linux-pm@vger.kernel.org, linux-rockchip@lists.infradead.org, dmaengine@vger.kernel.org, linux-fpga@vger.kernel.org, amd-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, intel-gfx@lists.freedesktop.org, intel-xe@lists.freedesktop.org, coresight@lists.linaro.org, iommu@lists.linux.dev, linux-amlogic@lists.infradead.org, linux-cxl@vger.kernel.org, linux-arm-msm@vger.kernel.org, linux-riscv@lists.infradead.org Subject: [PATCH 03/19] perf/imx8_ddr: Fix group validation Date: Wed, 13 Aug 2025 18:00:55 +0100 Message-Id: X-Mailer: git-send-email 2.39.2.101.g768bb238c484.dirty In-Reply-To: References: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" The group validation here is erroneously inspecting software events, as well as other hardware siblings, which are only checked for *after* they've already been misinterpreted. Once again, just ignore events which don't belong to our PMU, and don't duplicate what perf_event_open() will already check for us. Signed-off-by: Robin Murphy --- drivers/perf/fsl_imx8_ddr_perf.c | 21 +++++---------------- 1 file changed, 5 insertions(+), 16 deletions(-) diff --git a/drivers/perf/fsl_imx8_ddr_perf.c b/drivers/perf/fsl_imx8_ddr_perf.c index b989ffa95d69..56fe281974d2 100644 --- a/drivers/perf/fsl_imx8_ddr_perf.c +++ b/drivers/perf/fsl_imx8_ddr_perf.c @@ -331,6 +331,9 @@ static u32 ddr_perf_filter_val(struct perf_event *event) static bool ddr_perf_filters_compatible(struct perf_event *a, struct perf_event *b) { + /* Ignore grouped events that aren't ours */ + if (a->pmu != b->pmu) + return true; if (!ddr_perf_is_filtered(a)) return true; if (!ddr_perf_is_filtered(b)) @@ -409,16 +412,8 @@ static int ddr_perf_event_init(struct perf_event *event) return -EOPNOTSUPP; } - /* - * We must NOT create groups containing mixed PMUs, although software - * events are acceptable (for example to create a CCN group - * periodically read when a hrtimer aka cpu-clock leader triggers). - */ - if (event->group_leader->pmu != event->pmu && - !is_software_event(event->group_leader)) - return -EINVAL; - - if (pmu->devtype_data->quirks & DDR_CAP_AXI_ID_FILTER) { + if (event != event->group_leader && + pmu->devtype_data->quirks & DDR_CAP_AXI_ID_FILTER) { if (!ddr_perf_filters_compatible(event, event->group_leader)) return -EINVAL; for_each_sibling_event(sibling, event->group_leader) { @@ -427,12 +422,6 @@ static int ddr_perf_event_init(struct perf_event *event) } } - for_each_sibling_event(sibling, event->group_leader) { - if (sibling->pmu != event->pmu && - !is_software_event(sibling)) - return -EINVAL; - } - event->cpu = pmu->cpu; hwc->idx = -1; -- 2.39.2.101.g768bb238c484.dirty