linux/arch/arm64/lib
Ard Biesheuvel 7481cddf29 arm64/lib: add accelerated crc32 routines
Unlike crc32c(), which is wired up to the crypto API internally so the
optimal driver is selected based on the platform's capabilities,
crc32_le() is implemented as a library function using a slice-by-8 table
based C implementation. Even though few of the call sites may be
bottlenecks, calling a time variant implementation with a non-negligible
D-cache footprint is a bit of a waste, given that ARMv8.1 and up mandates
support for the CRC32 instructions that were optional in ARMv8.0, but are
already widely available, even on the Cortex-A53 based Raspberry Pi.

So implement routines that use these instructions if available, and fall
back to the existing generic routines otherwise. The selection is based
on alternatives patching.

Note that this unconditionally selects CONFIG_CRC32 as a builtin. Since
CRC32 is relied upon by core functionality such as CONFIG_OF_FLATTREE,
this just codifies the status quo.

Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
2018-09-10 16:10:53 +01:00
..
atomic_ll_sc.c arm64: introduce CONFIG_ARM64_LSE_ATOMICS as fallback to ll/sc atomics 2015-07-27 15:28:50 +01:00
clear_page.S
clear_user.S arm64: uaccess: Mask __user pointers for __arch_{clear, copy_*}_user 2018-02-06 22:53:40 +00:00
copy_from_user.S arm64: kpti: Fix the interaction between ASID switching and software PAN 2018-01-16 17:37:48 +00:00
copy_in_user.S arm64: uaccess: Mask __user pointers for __arch_{clear, copy_*}_user 2018-02-06 22:53:40 +00:00
copy_page.S arm64/lib: copy_page: use consistent prefetch stride 2017-07-25 10:04:42 +01:00
copy_template.S scripts/spelling.txt: add "overwritting" pattern and fix typo instances 2017-02-27 18:43:47 -08:00
copy_to_user.S arm64: kpti: Fix the interaction between ASID switching and software PAN 2018-01-16 17:37:48 +00:00
crc32.S arm64/lib: add accelerated crc32 routines 2018-09-10 16:10:53 +01:00
delay.c arm64: use WFE for long delays 2017-10-13 18:56:15 +01:00
Makefile arm64/lib: add accelerated crc32 routines 2018-09-10 16:10:53 +01:00
memchr.S arm64: use ENDPIPROC() to annotate position independent assembler routines 2015-10-12 16:19:45 +01:00
memcmp.S arm64: Fix misspellings in comments. 2016-03-04 18:19:17 +00:00
memcpy.S arm64: add KASAN support 2015-10-12 17:46:36 +01:00
memmove.S arm64: add KASAN support 2015-10-12 17:46:36 +01:00
memset.S arm64: add KASAN support 2015-10-12 17:46:36 +01:00
strchr.S arm64: klib: Optimised string functions 2013-03-21 17:39:30 +00:00
strcmp.S arm64: use ENDPIPROC() to annotate position independent assembler routines 2015-10-12 16:19:45 +01:00
strlen.S arm64: use ENDPIPROC() to annotate position independent assembler routines 2015-10-12 16:19:45 +01:00
strncmp.S arm64: use ENDPIPROC() to annotate position independent assembler routines 2015-10-12 16:19:45 +01:00
strnlen.S arm64/efi: Make strnlen() available to the EFI namespace 2016-02-16 10:32:10 +00:00
strrchr.S arm64/efi: Make strrchr() available to the EFI namespace 2018-03-05 13:45:38 -06:00
tishift.S arm64: export tishift functions to modules 2018-05-21 19:00:48 +01:00
uaccess_flushcache.c arm64: uaccess: Add the uaccess_flushcache.c file 2017-08-10 10:49:21 +01:00