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Subject[PATCH v6 06/24] arm64: ptrace: Provide definitions for PMR values
Date
Introduce fixed values for PMR that are going to be used to mask and
unmask interrupts by priority. These values are chosent in such a way
that a single bit (GIC_PMR_UNMASKED_BIT) encodes the information whether
interrupts are masked or not.

Signed-off-by: Julien Thierry <julien.thierry@arm.com>
Suggested-by: Daniel Thompson <daniel.thompson@linaro.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
---
arch/arm64/include/asm/ptrace.h | 6 ++++++
1 file changed, 6 insertions(+)

diff --git a/arch/arm64/include/asm/ptrace.h b/arch/arm64/include/asm/ptrace.h
index fce22c4..ce6998c 100644
--- a/arch/arm64/include/asm/ptrace.h
+++ b/arch/arm64/include/asm/ptrace.h
@@ -25,6 +25,12 @@
#define CurrentEL_EL1 (1 << 2)
#define CurrentEL_EL2 (2 << 2)

+/* PMR values used to mask/unmask interrupts */
+#define GIC_PRIO_IRQON 0xf0
+#define GIC_PRIO_STATUS_SHIFT 6
+#define GIC_PRIO_STATUS_BIT (1 << GIC_PRIO_STATUS_SHIFT)
+#define GIC_PRIO_IRQOFF (GIC_PRIO_IRQON ^ GIC_PRIO_STATUS_BIT)
+
/* Additional SPSR bits not exposed in the UABI */
#define PSR_IL_BIT (1 << 20)

--
1.9.1
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