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ARM: 8777/1: Hook up SYNC_CORE functionality for sys_membarrier()

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Exception return implies context synchronization, so we can hook up the
SYNC_CORE option to sys_membarrier() simply by selecting the Kconfig option,
just like we've done for arm64 already.

Cc: Orion Hodson <oth@google.com>
Acked-by: Mathieu Desnoyers <mathieu.desnoyers@efficios.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
This commit is contained in:
Will Deacon 2018-06-26 15:52:38 +01:00 committed by Russell King
parent ce397d215c
commit e69244d295
2 changed files with 5 additions and 4 deletions
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8
Documentation/features/sched/membarrier-sync-core/arch-support.txt
View File

@ -5,10 +5,10 @@
# #
# Architecture requirements # Architecture requirements
# #
# * arm64 # * arm/arm64
# #
# Rely on eret context synchronization when returning from IPI handler, and # Rely on implicit context synchronization as a result of exception return
# when returning to user-space. # when returning from IPI handler, and when returning to user-space.
# #
# * x86 # * x86
# #
@ -31,7 +31,7 @@
----------------------- -----------------------
| alpha: | TODO | | alpha: | TODO |
| arc: | TODO | | arc: | TODO |
| arm: | TODO | | arm: | ok |
| arm64: | ok | | arm64: | ok |
| c6x: | TODO | | c6x: | TODO |
| h8300: | TODO | | h8300: | TODO |

1
arch/arm/Kconfig
View File

@ -9,6 +9,7 @@ config ARM
select ARCH_HAS_ELF_RANDOMIZE select ARCH_HAS_ELF_RANDOMIZE
select ARCH_HAS_FORTIFY_SOURCE select ARCH_HAS_FORTIFY_SOURCE
select ARCH_HAS_KCOV select ARCH_HAS_KCOV
select ARCH_HAS_MEMBARRIER_SYNC_CORE
select ARCH_HAS_PTE_SPECIAL if ARM_LPAE select ARCH_HAS_PTE_SPECIAL if ARM_LPAE
select ARCH_HAS_PHYS_TO_DMA select ARCH_HAS_PHYS_TO_DMA
select ARCH_HAS_SET_MEMORY select ARCH_HAS_SET_MEMORY