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| author | Eugeniy Paltsev <eugeniy.paltsev@synopsys.com> | 2019-01-30 19:32:41 +0300 |
|---|---|---|
| committer | Vineet Gupta <vgupta@synopsys.com> | 2019-02-25 12:10:58 -0800 |
| commit | 76551468833cd5c356b1d9ff4bc9393fcf768a59 (patch) | |
| tree | 8e2552cc13389bc3c90c916b0342bfac7f3a90b1 /arch/arc/Kconfig | |
| parent | 4d1e7918aae59ef504f5170a4f0c7ae82339fcb2 (diff) | |
| download | linux-76551468833cd5c356b1d9ff4bc9393fcf768a59.tar.gz | |
ARCv2: Add explcit unaligned access support (and ability to disable too)
As of today we enable unaligned access unconditionally on ARCv2.
Do this under a Kconfig option to allow disable it for test, benchmarking
etc. Also while at it
- Select HAVE_EFFICIENT_UNALIGNED_ACCESS
- Although gcc defaults to unaligned access (since GNU 2018.03), add the
right toggles for enabling or disabling as appropriate
- update bootlog to prints both HW feature status (exists, enabled/disabled)
and SW status (used / not used).
- wire up the relaxed memcpy for unaligned access
Signed-off-by: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
[vgupta: squashed patches, handle gcc -mno-unaligned-access quick]
Diffstat (limited to 'arch/arc/Kconfig')
| -rw-r--r-- | arch/arc/Kconfig | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/arch/arc/Kconfig b/arch/arc/Kconfig index d750b302d5ab..95fb11a85566 100644 --- a/arch/arc/Kconfig +++ b/arch/arc/Kconfig @@ -386,6 +386,15 @@ config ARC_HAS_SWAPE if ISA_ARCV2 +config ARC_USE_UNALIGNED_MEM_ACCESS + bool "Enable unaligned access in HW" + default y + select HAVE_EFFICIENT_UNALIGNED_ACCESS + help + The ARC HS architecture supports unaligned memory access + which is disabled by default. Enable unaligned access in + hardware and use software to use it + config ARC_HAS_LL64 bool "Insn: 64bit LDD/STD" help |