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| author | Mark Rutland <mark.rutland@arm.com> | 2022-05-11 16:17:32 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-08-17 16:13:59 +0300 |
| commit | 2c1fc32a9ab838fb1d0e782cc2b203d6e9b52eaf (patch) | |
| tree | 3061dd54e9b448eb9320b465c5ee7040adfdeed7 /arch/Kconfig | |
| parent | 92b465c5fec3082a1a6fd7c3413b8f9a5a416c2a (diff) | |
| download | linux-2c1fc32a9ab838fb1d0e782cc2b203d6e9b52eaf.tar.xz | |
arch: make TRACE_IRQFLAGS_NMI_SUPPORT generic
[ Upstream commit 4510bffb4d0246cdcc1f14c7367c026b807a862d ]
On most architectures, IRQ flag tracing is disabled in NMI context, and
architectures need to define and select TRACE_IRQFLAGS_NMI_SUPPORT in
order to enable this.
Commit:
859d069ee1ddd878 ("lockdep: Prepare for NMI IRQ state tracking")
Permitted IRQ flag tracing in NMI context, allowing lockdep to work in
NMI context where an architecture had suitable entry logic. At the time,
most architectures did not have such suitable entry logic, and this broke
lockdep on such architectures. Thus, this was partially disabled in
commit:
ed00495333ccc80f ("locking/lockdep: Fix TRACE_IRQFLAGS vs. NMIs")
... with architectures needing to select TRACE_IRQFLAGS_NMI_SUPPORT to
enable IRQ flag tracing in NMI context.
Currently TRACE_IRQFLAGS_NMI_SUPPORT is defined under
arch/x86/Kconfig.debug. Move it to arch/Kconfig so architectures can
select it without having to provide their own definition.
Since the regular TRACE_IRQFLAGS_SUPPORT is selected by
arch/x86/Kconfig, the select of TRACE_IRQFLAGS_NMI_SUPPORT is moved
there too.
There should be no functional change as a result of this patch.
Signed-off-by: Mark Rutland <mark.rutland@arm.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Will Deacon <will@kernel.org>
Link: https://lore.kernel.org/r/20220511131733.4074499-2-mark.rutland@arm.com
Signed-off-by: Will Deacon <will@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'arch/Kconfig')
| -rw-r--r-- | arch/Kconfig | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/Kconfig b/arch/Kconfig index 71b9272acb28..5ea3e3838c21 100644 --- a/arch/Kconfig +++ b/arch/Kconfig @@ -223,6 +223,9 @@ config HAVE_FUNCTION_DESCRIPTORS config TRACE_IRQFLAGS_SUPPORT bool +config TRACE_IRQFLAGS_NMI_SUPPORT + bool + # # An arch should select this if it provides all these things: # |