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| author |   Julien Thierry <julien.thierry@arm.com> | 2019-06-11 10:38:11 +0100 |
|---|---|---|
| committer |   Catalin Marinas <catalin.marinas@arm.com> | 2019-06-21 15:50:23 +0100 |
| commit | 48ce8f80f5901f1f031b00be66d659d39f33b0a1 (patch) | |
| tree | cc0a9df40912c904f658cc063c2e2f230eb80489 /arch/arm64/Kconfig | |
| parent | arm64: Fix incorrect irqflag restore for priority masking (diff) | |
| download | linux-dev-48ce8f80f5901f1f031b00be66d659d39f33b0a1.tar.xz linux-dev-48ce8f80f5901f1f031b00be66d659d39f33b0a1.zip | |
arm64: irqflags: Introduce explicit debugging for IRQ priorities
Using IRQ priority masking to enable/disable interrupts is a bit
sensitive as it requires to deal with both ICC_PMR_EL1 and PSR.I.
Introduce some validity checks to both highlight the states in which
functions dealing with IRQ enabling/disabling can (not) be called, and
bark a warning when called in an unexpected state.
Since these checks are done on hotpaths, introduce a build option to
choose whether to do the checking.
Cc: Will Deacon <will.deacon@arm.com>
Reviewed-by: Marc Zyngier <marc.zyngier@arm.com>
Signed-off-by: Julien Thierry <julien.thierry@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'arch/arm64/Kconfig')
| -rw-r--r-- | arch/arm64/Kconfig | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index acd72e5f78ae..bd3915ae7b53 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -1436,6 +1436,17 @@ config ARM64_PSEUDO_NMI If unsure, say N +if ARM64_PSEUDO_NMI +config ARM64_DEBUG_PRIORITY_MASKING + bool "Debug interrupt priority masking" + help + This adds runtime checks to functions enabling/disabling + interrupts when using priority masking. The additional checks verify + the validity of ICC_PMR_EL1 when calling concerned functions. + + If unsure, say N +endif + config RELOCATABLE bool help |