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Improve __copy_to_user and __copy_from_user performance
authorpopcornmix <popcornmix@gmail.com>
Mon, 28 Nov 2016 16:50:04 +0000 (16:50 +0000)
committerThadeu Lima de Souza Cascardo <cascardo@canonical.com>
Fri, 9 Mar 2018 15:20:58 +0000 (12:20 -0300)
commitd48edba3b4b2db84954f0bdfeeae2d7e8d55d772
tree9a717660bfddec7cc853b6ab41fd75531405ee0dtree
parentca12c3a64548a096a7ba111a0c3f416247fa4724commit | diff
Improve __copy_to_user and __copy_from_user performance

Provide a __copy_from_user that uses memcpy. On BCM2708, use
optimised memcpy/memmove/memcmp/memset implementations.

arch/arm: Add mmiocpy/set aliases for memcpy/set

See: https://github.com/raspberrypi/linux/issues/1082

copy_from_user: CPU_SW_DOMAIN_PAN compatibility

The downstream copy_from_user acceleration must also play nice with
CONFIG_CPU_SW_DOMAIN_PAN.

See: https://github.com/raspberrypi/linux/issues/1381

Signed-off-by: Phil Elwell <phil@raspberrypi.org>
13 files changed:
arch/arm/include/asm/string.h diff | blob | blame | history
arch/arm/include/asm/uaccess.h diff | blob | blame | history
arch/arm/lib/Makefile diff | blob | blame | history
arch/arm/lib/arm-mem.h [new file with mode: 0644] blob
arch/arm/lib/copy_from_user.S diff | blob | blame | history
arch/arm/lib/exports_rpi.c [new file with mode: 0644] blob
arch/arm/lib/memcmp_rpi.S [new file with mode: 0644] blob
arch/arm/lib/memcpy_rpi.S [new file with mode: 0644] blob
arch/arm/lib/memcpymove.h [new file with mode: 0644] blob
arch/arm/lib/memmove_rpi.S [new file with mode: 0644] blob
arch/arm/lib/memset_rpi.S [new file with mode: 0644] blob
arch/arm/lib/uaccess_with_memcpy.c diff | blob | blame | history
arch/arm/mach-bcm/Kconfig diff | blob | blame | history
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