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Tue, 05 May 2026 05:25:04 -0700 (PDT) Received: from hu-uchheda-hyd.qualcomm.com ([202.46.23.25]) by smtp.gmail.com with ESMTPSA id 41be03b00d2f7-c7ffbbaac5bsm12597998a12.6.2026.05.05.05.24.58 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 05 May 2026 05:25:04 -0700 (PDT) From: Umang Chheda Date: Tue, 05 May 2026 17:53:46 +0530 Subject: [PATCH 2/8] ras: aest: Fix CE/UE error counts not incrementing in debugfs Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: 7bit Message-Id: <20260505-aest-devicetree-support-v1-2-d5d6ffacf0a5@oss.qualcomm.com> References: <20260505-aest-devicetree-support-v1-0-d5d6ffacf0a5@oss.qualcomm.com> In-Reply-To: <20260505-aest-devicetree-support-v1-0-d5d6ffacf0a5@oss.qualcomm.com> To: Ruidong Tian , Tony Luck , Borislav Petkov , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Bjorn Andersson , Konrad Dybcio , catalin.marinas@arm.com, will@kernel.org, lpieralisi@kernel.org, rafael@kernel.org, mark.rutland@arm.com, Sudeep Holla Cc: linux-arm-msm@vger.kernel.org, linux-acpi@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-edac@vger.kernel.org, linux-kernel@vger.kernel.org, devicetree@vger.kernel.org, linux-edac@vger.kernel.org, Umang Chheda X-Mailer: b4 0.15.1 X-Developer-Signature: v=1; a=ed25519-sha256; t=1777983885; l=2690; i=umang.chheda@oss.qualcomm.com; s=20260328; h=from:subject:message-id; bh=K7/WGQ524x+e2ze3I8r02DnkbU84gUgAARamEEr7Lg4=; b=5srgoRDiOLE+04KITceVdE78eHY9ax0xzcodvWQFYmfY3QszjcUqV1fapWymL8cEoMNtESzDE hlR4muq4F70BQ11YJzNFbjlpe+vvXZxKIK3RDMz5XqD1b9rqRIt0Cm1 X-Developer-Key: i=umang.chheda@oss.qualcomm.com; a=ed25519; pk=3+tjZ+PFFYphz0Vvu4B14pBQSzqcG0jZAQspTaDRQYA= X-Authority-Analysis: v=2.4 cv=U9eiy+ru c=1 sm=1 tr=0 ts=69f9e1a1 cx=c_pps a=Qgeoaf8Lrialg5Z894R3/Q==:117 a=ZePRamnt/+rB5gQjfz0u9A==:17 a=IkcTkHD0fZMA:10 a=NGcC8JguVDcA:10 a=s4-Qcg_JpJYA:10 a=VkNPw1HP01LnGYTKEx00:22 a=u7WPNUs3qKkmUXheDGA7:22 a=DJpcGTmdVt4CTyJn9g5Z:22 a=EUspDBNiAAAA:8 a=IvwcuExtd9bf9WbcJAsA:9 a=QEXdDO2ut3YA:10 a=x9snwWr2DeNwDh03kgHS:22 X-Proofpoint-ORIG-GUID: 8rNS05vG2KhFDKElMDiRC7dZPKD_-7_2 X-Proofpoint-GUID: 8rNS05vG2KhFDKElMDiRC7dZPKD_-7_2 X-Proofpoint-Spam-Details-Enc: AW1haW4tMjYwNTA1MDExNyBTYWx0ZWRfX5I79RSYmfpkh DDtohhC8J6LtNDtxtj+20r644G5a503e+GxawNP0SIAd81Fvsi3AKZ8UUur5R45DywieT59vpQi bYNwJ9FEFaLTQAizKVlzE7vqNt6AkuL777hSKiOSW8t4jhg2ZtLeBeyGqaEBXgxZP1azMGTzxKr OXr3jnNIYrqt9kls6UaiIAFod0TL17v4XlFXjAZwEKOgzoIUdynJNatKrDn/dmC6uOcZirMPauL ygo+5gvC8sGTgLelO3L8aZsT7D7jtt6Tl7tMzHxAtagglVtuqnjHmMpnCWNxrxZZkLoxNQXtwZG vmMPDNXYvMVFjGx7HrlUHK/Y6gDnqxYPWxTysBbDb+Db/Frrv7C03SW4FStdK3S/ITmIhR97Lr1 t7Wq2KQvtlcL9NIRHJ3Wy7FDw9E43MhGPdL0Uptegeq15SaanDxE37Zh4oNkMqQRwEQDxonpxWy xxoaUAP+Dxgx1EaS8DA== X-Proofpoint-Virus-Version: vendor=baseguard engine=ICAP:2.0.293,Aquarius:18.0.1143,Hydra:6.1.51,FMLib:17.12.100.49 definitions=2026-05-05_02,2026-04-30_02,2025-10-01_01 X-Proofpoint-Spam-Details: rule=outbound_notspam policy=outbound score=0 malwarescore=0 lowpriorityscore=0 adultscore=0 phishscore=0 spamscore=0 bulkscore=0 priorityscore=1501 impostorscore=0 clxscore=1015 suspectscore=0 classifier=typeunknown authscore=0 authtc= authcc= route=outbound adjust=0 reason=mlx scancount=1 engine=8.22.0-2604200000 definitions=main-2605050117 The error counts visible under: /sys/kernel/debug/aest//processor//err_count always reported zero, even though corrected errors (CEs) were being serviced by the interrupt handler. aest_oncore_dev_init_debugfs() sets up per CPU debugfs entries but wired them up incorrectly in two places: - this_cpu_ptr(adev->adev_oncore) was used inside for_each_possible_cpu(). This always selects the slot for the CPU executing the init code, so all debugfs files ended up referencing the same per CPU aest_device instance instead of the CPU indicated by the loop variable. - The code referenced adev->nodes[i], i.e. the template nodes allocated before __setup_ppi, rather than the per-CPU copies at percpu_dev->nodes[i]. The IRQ handler updates CE counters in the per-CPU records created by __setup_ppi, the template records are never touched at runtime, so err_count always read as zero. Fix this by: - Using per_cpu_ptr(adev->adev_oncore, cpu) when iterating over CPUs. Wiring debugfs files to percpu_dev->nodes[i] so counters reflect the data updated by the IRQ handler. - Using adev->nodes[i].name for debugfs directory names. The per-CPU node receives name via a shallow memcpy and is not the authoritative source. Signed-off-by: Umang Chheda --- drivers/ras/aest/aest-sysfs.c | 19 +++++++++++++------ 1 file changed, 13 insertions(+), 6 deletions(-) diff --git a/drivers/ras/aest/aest-sysfs.c b/drivers/ras/aest/aest-sysfs.c index 66e9c1103f99..f710503e4d74 100644 --- a/drivers/ras/aest/aest-sysfs.c +++ b/drivers/ras/aest/aest-sysfs.c @@ -189,16 +189,23 @@ aest_oncore_dev_init_debugfs(struct aest_device *adev) char name[16]; for_each_possible_cpu(cpu) { - percpu_dev = this_cpu_ptr(adev->adev_oncore); + percpu_dev = per_cpu_ptr(adev->adev_oncore, cpu); - snprintf(name, sizeof(name), "processor%u%u", cpu); + snprintf(name, sizeof(name), "processor%u", cpu); percpu_dev->debugfs = debugfs_create_dir(name, adev->debugfs); for (i = 0; i < adev->node_cnt; i++) { - node = &adev->nodes[i]; - - node->debugfs = debugfs_create_dir(node->name, - percpu_dev->debugfs); + node = &percpu_dev->nodes[i]; + + /* + * Use adev->nodes[i].name (the original) rather than + * node->name from the per-CPU copy. The per-CPU copy + * receives node->name via shallow memcpy in __setup_ppi; + * the original is the authoritative, guaranteed-valid + * string. + */ + node->debugfs = debugfs_create_dir(adev->nodes[i].name, + percpu_dev->debugfs); aest_node_init_debugfs(node); } } -- 2.34.1