arm64: irqflags: Introduce explicit debugging for IRQ priorities

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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>

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Julien Thierry 2019-06-11 10:38:11 +01:00 • committed by Catalin Marinas

parent bd82d4bd21

commit 48ce8f80f5

4 changed files with 36 additions and 0 deletions

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11

arch/arm64/Kconfig

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6

arch/arm64/include/asm/cpufeature.h

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7

arch/arm64/include/asm/daifflags.h

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12

arch/arm64/include/asm/irqflags.h

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