Provide a build option to enable using GICv3 priorities to enable/disable interrupts.
Signed-off-by: Julien Thierry <julien.thie...@arm.com> Suggested-by: Daniel Thompson <daniel.thomp...@linaro.org> Cc: Catalin Marinas <catalin.mari...@arm.com> Cc: Will Deacon <will.dea...@arm.com> --- arch/arm64/Kconfig | 15 +++++++++++++++ 1 file changed, 15 insertions(+) diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index eb2cf49..ab214b9 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -938,6 +938,21 @@ config HARDEN_EL2_VECTORS If unsure, say Y. +config USE_ICC_SYSREGS_FOR_IRQFLAGS + bool "Use ICC system registers for IRQ masking" + select CONFIG_ARM_GIC_V3 + help + Using the ICC system registers for IRQ masking makes it possible + to simulate NMI on ARM64 systems. This allows several interesting + features (especially debug features) to be used on these systems. + + Say Y here to implement IRQ masking using ICC system + registers when the GIC System Registers are available. The changes + are applied dynamically using the alternatives system so it is safe + to enable this option on systems with older interrupt controllers. + + If unsure, say N + menuconfig ARMV8_DEPRECATED bool "Emulate deprecated/obsolete ARMv8 instructions" depends on COMPAT -- 1.9.1