Validate there are no duplicate ITS-MSI hwirqs from the /sys/kernel/irq/*/hwirq.
One example log show 2 duplicated MSI entries in the /proc/interrupts.
150: 0 ... ITS-MSI 3355443200 Edge pciehp 152: 0 ... ITS-MSI 3355443200 Edge pciehp
Kernel patch ("PCI/MSI: Fix MSI hwirq truncation") [1] fix above issue. [1]: https://lore.kernel.org/all/20240115135649.708536-1-vidyas@nvidia.com/
Reviewed-by: Matthew R. Ochs mochs@nvidia.com Signed-off-by: Joseph Jang jjang@nvidia.com --- tools/testing/selftests/drivers/irq/Makefile | 5 +++++ .../selftests/drivers/irq/its-msi-irq-test.sh | 20 +++++++++++++++++++ 2 files changed, 25 insertions(+) create mode 100644 tools/testing/selftests/drivers/irq/Makefile create mode 100755 tools/testing/selftests/drivers/irq/its-msi-irq-test.sh
diff --git a/tools/testing/selftests/drivers/irq/Makefile b/tools/testing/selftests/drivers/irq/Makefile new file mode 100644 index 000000000000..569df5de22ee --- /dev/null +++ b/tools/testing/selftests/drivers/irq/Makefile @@ -0,0 +1,5 @@ +# SPDX-License-Identifier: GPL-2.0 + +TEST_PROGS := its-msi-irq-test.sh + +include ../../lib.mk diff --git a/tools/testing/selftests/drivers/irq/its-msi-irq-test.sh b/tools/testing/selftests/drivers/irq/its-msi-irq-test.sh new file mode 100755 index 000000000000..87c88674903f --- /dev/null +++ b/tools/testing/selftests/drivers/irq/its-msi-irq-test.sh @@ -0,0 +1,20 @@ +#!/bin/bash +# SPDX-License-Identifier: GPL-2.0 + +if [ -z "$(grep "ITS-MSI" /proc/interrupts)" ]; then + echo "SKIP: no ITS-MSI irq." + exit 4 +fi + +# Get ITS-MSI hwirq list from /sys/kernel/irq/*/hwirq. +its_msi_irq_list=$(grep "ITS-MSI" /sys/kernel/irq/*/chip_name | + awk -F ':' '{print $1}' | + xargs -I {} sh -c 'cat $(dirname {})/hwirq' | sort -V) + +# Check whether could find duplicated its-msi hwirq or not. +if [ -n "$(echo "$its_msi_irq_list" | uniq -cd)" ]; then + echo "ERROR: find duplicated its-msi hwirq." + exit 1 +fi + +exit 0