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Tue, 3 Sep 2024 18:44:29 -0700 From: Joseph Jang To: , , , , , , CC: Subject: [PATCH] selftest: drivers: Add support to check duplicate hwirq Date: Tue, 3 Sep 2024 18:44:26 -0700 Message-ID: <20240904014426.3404397-1-jjang@nvidia.com> X-Mailer: git-send-email 2.34.1 Precedence: bulk X-Mailing-List: linux-kselftest@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-NV-OnPremToCloud: ExternallySecured X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: SJ1PEPF00002323:EE_|PH7PR12MB7939:EE_ X-MS-Office365-Filtering-Correlation-Id: 2f1868f2-6513-4345-42c5-08dccc8320f8 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0; ARA:13230040|36860700013|1800799024|376014|82310400026; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:216.228.118.232; CTRY:US; LANG:en; SCL:1; SRV:; IPV:NLI; SFV:NSPM; H:mail.nvidia.com; PTR:dc7edge1.nvidia.com; CAT:NONE; SFS:(13230040)(36860700013)(1800799024)(376014)(82310400026); DIR:OUT; SFP:1101; X-OriginatorOrg: Nvidia.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 04 Sep 2024 01:44:34.5378 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 2f1868f2-6513-4345-42c5-08dccc8320f8 X-MS-Exchange-CrossTenant-Id: 43083d15-7273-40c1-b7db-39efd9ccc17a X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=43083d15-7273-40c1-b7db-39efd9ccc17a; Ip=[216.228.118.232]; Helo=[mail.nvidia.com] X-MS-Exchange-CrossTenant-AuthSource: SJ1PEPF00002323.namprd03.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: PH7PR12MB7939 Validate there are no duplicate hwirq from the irq debug file system /sys/kernel/debug/irq/irqs/* per chip name. One example log show 2 duplicated hwirq in the irq debug file system. $ sudo cat /sys/kernel/debug/irq/irqs/163 handler: handle_fasteoi_irq device: 0019:00:00.0 node: 1 affinity: 72-143 effectiv: 76 domain: irqchip@0x0000100022040000-3 hwirq: 0xc8000000 chip: ITS-MSI flags: 0x20 $ sudo cat /sys/kernel/debug/irq/irqs/174 handler: handle_fasteoi_irq device: 0039:00:00.0 node: 3 affinity: 216-287 effectiv: 221 domain: irqchip@0x0000300022040000-3 hwirq: 0xc8000000 chip: ITS-MSI flags: 0x20 The irq-check.sh can help to collect hwirq and chip name from /sys/kernel/debug/irq/irqs/* and print error log when find duplicate hwirq per chip name. Kernel patch ("PCI/MSI: Fix MSI hwirq truncation") [1] fix above issue. [1]: https://lore.kernel.org/all/20240115135649.708536-1-vidyas@nvidia.com/ Signed-off-by: Joseph Jang Reviewed-by: Matthew R. Ochs --- tools/testing/selftests/drivers/irq/Makefile | 5 +++ tools/testing/selftests/drivers/irq/config | 2 + .../selftests/drivers/irq/irq-check.sh | 39 +++++++++++++++++++ 3 files changed, 46 insertions(+) create mode 100644 tools/testing/selftests/drivers/irq/Makefile create mode 100644 tools/testing/selftests/drivers/irq/config create mode 100755 tools/testing/selftests/drivers/irq/irq-check.sh diff --git a/tools/testing/selftests/drivers/irq/Makefile b/tools/testing/selftests/drivers/irq/Makefile new file mode 100644 index 000000000000..d6998017c861 --- /dev/null +++ b/tools/testing/selftests/drivers/irq/Makefile @@ -0,0 +1,5 @@ +# SPDX-License-Identifier: GPL-2.0 + +TEST_PROGS := irq-check.sh + +include ../../lib.mk diff --git a/tools/testing/selftests/drivers/irq/config b/tools/testing/selftests/drivers/irq/config new file mode 100644 index 000000000000..a53d3b713728 --- /dev/null +++ b/tools/testing/selftests/drivers/irq/config @@ -0,0 +1,2 @@ +CONFIG_GENERIC_IRQ_DEBUGFS=y +CONFIG_GENERIC_IRQ_INJECTION=y diff --git a/tools/testing/selftests/drivers/irq/irq-check.sh b/tools/testing/selftests/drivers/irq/irq-check.sh new file mode 100755 index 000000000000..e784777043a1 --- /dev/null +++ b/tools/testing/selftests/drivers/irq/irq-check.sh @@ -0,0 +1,39 @@ +#!/bin/bash +# SPDX-License-Identifier: GPL-2.0 + +# This script need root permission +uid=$(id -u) +if [ $uid -ne 0 ]; then + echo "SKIP: Must be run as root" + exit 4 +fi + +# Ensure debugfs is mounted +mount -t debugfs nodev /sys/kernel/debug 2>/dev/null +if [ ! -d "/sys/kernel/debug/irq/irqs" ]; then + echo "SKIP: irq debugfs not found" + exit 4 +fi + +# Traverse the irq debug file system directory to collect chip_name and hwirq +hwirq_list=$(for irq_file in /sys/kernel/debug/irq/irqs/*; do + # Read chip name and hwirq from the irq_file + chip_name=$(cat "$irq_file" | grep -m 1 'chip:' | awk '{print $2}') + hwirq=$(cat "$irq_file" | grep -m 1 'hwirq:' | awk '{print $2}' ) + + if [ -z "$chip_name" ] || [ -z "$hwirq" ]; then + continue + fi + + echo "$chip_name $hwirq" +done) + +dup_hwirq_list=$(echo "$hwirq_list" | sort | uniq -cd) + +if [ -n "$dup_hwirq_list" ]; then + echo "ERROR: Found duplicate hwirq" + echo "$dup_hwirq_list" + exit 1 +fi + +exit 0