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| author |   Will Deacon <will.deacon@arm.com> | 2018-06-26 15:52:38 +0100 |
|---|---|---|
| committer |   Russell King <rmk+kernel@armlinux.org.uk> | 2018-07-11 11:02:08 +0100 |
| commit | e69244d29558c947703851a26bfed833945c093a (patch) | |
| tree | 895f91364e86dd61318f347b12afa1104ab0788a | |
| parent | Linux 4.18-rc1 (diff) | |
| download | linux-dev-e69244d29558c947703851a26bfed833945c093a.tar.xz linux-dev-e69244d29558c947703851a26bfed833945c093a.zip | |
ARM: 8777/1: Hook up SYNC_CORE functionality for sys_membarrier()
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>
| -rw-r--r-- | Documentation/features/sched/membarrier-sync-core/arch-support.txt | 8 | ||||
| -rw-r--r-- | arch/arm/Kconfig | 1 |
2 files changed, 5 insertions, 4 deletions
diff --git a/Documentation/features/sched/membarrier-sync-core/arch-support.txt b/Documentation/features/sched/membarrier-sync-core/arch-support.txt index dbdf62907703..c7858dd1ea8f 100644 --- a/Documentation/features/sched/membarrier-sync-core/arch-support.txt +++ b/Documentation/features/sched/membarrier-sync-core/arch-support.txt @@ -5,10 +5,10 @@ # # Architecture requirements # -# * arm64 +# * arm/arm64 # -# Rely on eret context synchronization when returning from IPI handler, and -# when returning to user-space. +# Rely on implicit context synchronization as a result of exception return +# when returning from IPI handler, and when returning to user-space. # # * x86 # @@ -31,7 +31,7 @@ ----------------------- | alpha: | TODO | | arc: | TODO | - | arm: | TODO | + | arm: | ok | | arm64: | ok | | c6x: | TODO | | h8300: | TODO | diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index 54eeb8d00bc6..b0ac18547370 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -9,6 +9,7 @@ config ARM select ARCH_HAS_ELF_RANDOMIZE select ARCH_HAS_FORTIFY_SOURCE select ARCH_HAS_KCOV + select ARCH_HAS_MEMBARRIER_SYNC_CORE select ARCH_HAS_PTE_SPECIAL if ARM_LPAE select ARCH_HAS_PHYS_TO_DMA select ARCH_HAS_SET_MEMORY |