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| author | Will Deacon <will.deacon@arm.com> | 2013-12-17 19:50:16 +0100 |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2013-12-29 13:46:50 +0100 |
| commit | dce5c9e35bc4085bd33eccdb8c9ec5a643507a14 (patch) | |
| tree | 101ffd028417f609a5424d8037b8c54f6421257b /arch/arm/Kconfig | |
| parent | ARM: 7927/1: dcache: select DCACHE_WORD_ACCESS for big-endian CPUs (diff) | |
| download | linux-dce5c9e35bc4085bd33eccdb8c9ec5a643507a14.tar.xz linux-dce5c9e35bc4085bd33eccdb8c9ec5a643507a14.zip | |
ARM: 7928/1: kconfig: select HAVE_EFFICIENT_UNALIGNED_ACCESS for CPUv6+ && MMU
Modern ARM CPUs can perform efficient unaligned memory accesses in
hardware and this feature is relied up on by code such as the dcache
word-at-a-time name hashing.
This patch selects HAVE_EFFICIENT_UNALIGNED_ACCESS for these cores and
reworks the kconfig select logic for DCACHE_WORD_ACCESS to use the new
symbol.
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/Kconfig')
| -rw-r--r-- | arch/arm/Kconfig | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/arch/arm/Kconfig b/arch/arm/Kconfig index 810a0c4b03b4..929915e177ae 100644 --- a/arch/arm/Kconfig +++ b/arch/arm/Kconfig @@ -12,7 +12,7 @@ config ARM select BUILDTIME_EXTABLE_SORT if MMU select CLONE_BACKWARDS select CPU_PM if (SUSPEND || CPU_IDLE) - select DCACHE_WORD_ACCESS if (CPU_V6 || CPU_V6K || CPU_V7) && MMU + select DCACHE_WORD_ACCESS if HAVE_EFFICIENT_UNALIGNED_ACCESS select GENERIC_ATOMIC64 if (CPU_V7M || CPU_V6 || !CPU_32v6K || !AEABI) select GENERIC_CLOCKEVENTS_BROADCAST if SMP select GENERIC_IDLE_POLL_SETUP @@ -36,6 +36,7 @@ config ARM select HAVE_DMA_ATTRS select HAVE_DMA_CONTIGUOUS if MMU select HAVE_DYNAMIC_FTRACE if (!XIP_KERNEL) + select HAVE_EFFICIENT_UNALIGNED_ACCESS if (CPU_V6 || CPU_V6K || CPU_V7) && MMU select HAVE_FTRACE_MCOUNT_RECORD if (!XIP_KERNEL) select HAVE_FUNCTION_GRAPH_TRACER if (!THUMB2_KERNEL) select HAVE_FUNCTION_TRACER if (!XIP_KERNEL) |