diff options
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/include/asm/cpufeature.h | |
parent | bd82d4bd21880b7c4d5f5756be435095d6ae07b5 (diff) |
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/include/asm/cpufeature.h')
-rw-r--r-- | arch/arm64/include/asm/cpufeature.h | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/arch/arm64/include/asm/cpufeature.h b/arch/arm64/include/asm/cpufeature.h index bc895c869892..693a086e2148 100644 --- a/arch/arm64/include/asm/cpufeature.h +++ b/arch/arm64/include/asm/cpufeature.h @@ -617,6 +617,12 @@ static inline bool system_uses_irq_prio_masking(void) cpus_have_const_cap(ARM64_HAS_IRQ_PRIO_MASKING); } +static inline bool system_has_prio_mask_debugging(void) +{ + return IS_ENABLED(CONFIG_ARM64_DEBUG_PRIORITY_MASKING) && + system_uses_irq_prio_masking(); +} + #define ARM64_SSBD_UNKNOWN -1 #define ARM64_SSBD_FORCE_DISABLE 0 #define ARM64_SSBD_KERNEL 1 |