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authorMark Rutland <mark.rutland@arm.com>2016-05-31 11:33:01 (GMT)
committerCatalin Marinas <catalin.marinas@arm.com>2016-06-21 16:07:09 (GMT)
commit275f344bec51e9100bae81f3cc8c6940bbfb24c0 (patch)
treeeac2a9c274c24ac8e3e8e15dca05f9ffb5c24938 /arch/arm64/mm
parentb67a8b29df7e6410c605c2759707c96512b15578 (diff)
downloadlinux-275f344bec51e9100bae81f3cc8c6940bbfb24c0.tar.xz
arm64: add macro to extract ESR_ELx.EC
Several places open-code extraction of the EC field from an ESR_ELx value, in subtly different ways. This is unfortunate duplication and variation, and the precise logic used to extract the field is a distraction. This patch adds a new macro, ESR_ELx_EC(), to extract the EC field from an ESR_ELx value in a consistent fashion. Existing open-coded extractions in core arm64 code are moved over to the new helper. KVM code is left as-is for the moment. Signed-off-by: Mark Rutland <mark.rutland@arm.com> Tested-by: Huang Shijie <shijie.huang@arm.com> Cc: Dave P Martin <dave.martin@arm.com> Cc: James Morse <james.morse@arm.com> Cc: Marc Zyngier <marc.zyngier@arm.com> Cc: Will Deacon <will.deacon@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'arch/arm64/mm')
-rw-r--r--arch/arm64/mm/fault.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/arm64/mm/fault.c b/arch/arm64/mm/fault.c
index 013e2cb..d2c124c 100644
--- a/arch/arm64/mm/fault.c
+++ b/arch/arm64/mm/fault.c
@@ -244,7 +244,7 @@ out:
static inline int permission_fault(unsigned int esr)
{
- unsigned int ec = (esr & ESR_ELx_EC_MASK) >> ESR_ELx_EC_SHIFT;
+ unsigned int ec = ESR_ELx_EC(esr);
unsigned int fsc_type = esr & ESR_ELx_FSC_TYPE;
return (ec == ESR_ELx_EC_DABT_CUR && fsc_type == ESR_ELx_FSC_PERM);