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authorQi Zheng <zhengqi.arch@bytedance.com>2022-08-15 20:47:39 +0800
committerCatalin Marinas <catalin.marinas@arm.com>2022-09-09 19:01:38 +0100
commit8eb858c44b98e0326bb32fca34ae671995cd73bb (patch)
tree0d31b053090bfd35ecd4b502d8b169132548e484 /arch/arm64/Kconfig
parent3fc24ef32d3b9368f4c103dcd21d6a3f959b4870 (diff)
arm64: run softirqs on the per-CPU IRQ stack
Currently arm64 supports per-CPU IRQ stack, but softirqs are still handled in the task context. Since any call to local_bh_enable() at any level in the task's call stack may trigger a softirq processing run, which could potentially cause a task stack overflow if the combined stack footprints exceed the stack's size, let's run these softirqs on the IRQ stack as well. Signed-off-by: Qi Zheng <zhengqi.arch@bytedance.com> Reviewed-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Will Deacon <will@kernel.org> Link: https://lore.kernel.org/r/20220815124739.15948-1-zhengqi.arch@bytedance.com Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'arch/arm64/Kconfig')
-rw-r--r--arch/arm64/Kconfig1
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index b17d6861a3ad..6f1ecf4538f7 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -230,6 +230,7 @@ config ARM64
select HAVE_ARCH_USERFAULTFD_MINOR if USERFAULTFD
select TRACE_IRQFLAGS_SUPPORT
select TRACE_IRQFLAGS_NMI_SUPPORT
+ select HAVE_SOFTIRQ_ON_OWN_STACK
help
ARM 64-bit (AArch64) Linux support.