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| author | Nicholas Piggin <npiggin@gmail.com> | 2021-09-23 00:54:49 +1000 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2021-12-16 21:31:45 +1100 |
| commit | 5a7745b96f43c69f9b4875bcf516a0341acbc3fb (patch) | |
| tree | af621e8bd5a05f776d9ca90d9e5074cd2b13c372 /arch/powerpc/include | |
| parent | ff0b0d6e1a7bc202241a9b1e28d1da4b744e0312 (diff) | |
| download | linux-5a7745b96f43c69f9b4875bcf516a0341acbc3fb.tar.bz2 | |
powerpc/64s/perf: add power_pmu_wants_prompt_pmi to say whether perf wants PMIs to be soft-NMI
Interrupt code enables MSR[EE] in some irq handlers while keeping local
irqs disabled via soft-mask, allowing PMI interrupts to be taken as
soft-NMI to improve profiling of irq handlers.
When perf is not enabled, there is no point to doing this, it's
additional overhead. So provide a function that can say if PMIs should
be taken promptly if possible.
Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20210922145452.352571-4-npiggin@gmail.com
Diffstat (limited to 'arch/powerpc/include')
| -rw-r--r-- | arch/powerpc/include/asm/hw_irq.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/hw_irq.h b/arch/powerpc/include/asm/hw_irq.h index 7a2690e97b0e..8d6f80101eda 100644 --- a/arch/powerpc/include/asm/hw_irq.h +++ b/arch/powerpc/include/asm/hw_irq.h @@ -342,6 +342,8 @@ static inline bool lazy_irq_pending_nocheck(void) return __lazy_irq_pending(local_paca->irq_happened); } +bool power_pmu_wants_prompt_pmi(void); + /* * This is called by asynchronous interrupts to conditionally * re-enable hard interrupts after having cleared the source |