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| author | Sumit Garg <sumit.garg@linaro.org> | 2020-10-07 14:21:43 +0530 |
|---|---|---|
| committer | Will Deacon <will@kernel.org> | 2020-11-25 15:18:39 +0000 |
| commit | 367c820ef08082e68df8a3bc12e62393af21e4b5 (patch) | |
| tree | 9388278f38941afced7096bf9b16a0fe9c9a0530 /arch/arm64/Kconfig | |
| parent | 6b46338f2210e37deeb3cdd40b04e3c597b47570 (diff) | |
| download | lwn-367c820ef08082e68df8a3bc12e62393af21e4b5.tar.gz lwn-367c820ef08082e68df8a3bc12e62393af21e4b5.zip | |
arm64: Enable perf events based hard lockup detector
With the recent feature added to enable perf events to use pseudo NMIs
as interrupts on platforms which support GICv3 or later, its now been
possible to enable hard lockup detector (or NMI watchdog) on arm64
platforms. So enable corresponding support.
One thing to note here is that normally lockup detector is initialized
just after the early initcalls but PMU on arm64 comes up much later as
device_initcall(). So we need to re-initialize lockup detection once
PMU has been initialized.
Signed-off-by: Sumit Garg <sumit.garg@linaro.org>
Acked-by: Alexandru Elisei <alexandru.elisei@arm.com>
Link: https://lore.kernel.org/r/1602060704-10921-1-git-send-email-sumit.garg@linaro.org
Signed-off-by: Will Deacon <will@kernel.org>
Diffstat (limited to 'arch/arm64/Kconfig')
| -rw-r--r-- | arch/arm64/Kconfig | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index 1515f6f153a0..7d3440770b14 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -170,6 +170,8 @@ config ARM64 select HAVE_NMI select HAVE_PATA_PLATFORM select HAVE_PERF_EVENTS + select HAVE_PERF_EVENTS_NMI if ARM64_PSEUDO_NMI + select HAVE_HARDLOCKUP_DETECTOR_PERF if PERF_EVENTS && HAVE_PERF_EVENTS_NMI select HAVE_PERF_REGS select HAVE_PERF_USER_STACK_DUMP select HAVE_REGS_AND_STACK_ACCESS_API |