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Subject[PATCH v10 18/25] arm64: gic-v3: Implement arch support for priority masking
Date
Implement architecture specific primitive allowing the GICv3 driver to
use priorities to mask interrupts.

Signed-off-by: Julien Thierry <julien.thierry@arm.com>
Suggested-by: Daniel Thompson <daniel.thompson@linaro.org>
Acked-by: Marc Zyngier <marc.zyngier@arm.com>
Cc: Marc Zyngier <marc.zyngier@arm.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
---
arch/arm64/include/asm/arch_gicv3.h | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)

diff --git a/arch/arm64/include/asm/arch_gicv3.h b/arch/arm64/include/asm/arch_gicv3.h
index b5f8142..14b41dd 100644
--- a/arch/arm64/include/asm/arch_gicv3.h
+++ b/arch/arm64/include/asm/arch_gicv3.h
@@ -22,6 +22,7 @@

#ifndef __ASSEMBLY__

+#include <linux/irqchip/arm-gic-common.h>
#include <linux/stringify.h>
#include <asm/barrier.h>
#include <asm/cacheflush.h>
@@ -162,14 +163,13 @@ static inline bool gic_prio_masking_enabled(void)

static inline void gic_pmr_mask_irqs(void)
{
- /* Should not get called yet. */
- WARN_ON_ONCE(true);
+ BUILD_BUG_ON(GICD_INT_DEF_PRI <= GIC_PRIO_IRQOFF);
+ gic_write_pmr(GIC_PRIO_IRQOFF);
}

static inline void gic_arch_enable_irqs(void)
{
- /* Should not get called yet. */
- WARN_ON_ONCE(true);
+ asm volatile ("msr daifclr, #2" : : : "memory");
}

#endif /* __ASSEMBLY__ */
--
1.9.1
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