Skip to main content

Browse the archive

https://github.com/torvalds/linux
05 April 2024, 19:05:47 UTC
Revision 429388682dc266e7a693f9c27e3aabd341d55343 authored by Will Deacon on 22 June 2018, 08:31:15 UTC, committed by Catalin Marinas on 27 June 2018, 17:21:53 UTC 
arm64: Avoid flush_icache_range() in alternatives patching code
 
The implementation of flush_icache_range() includes instruction sequences
which are themselves patched at runtime, so it is not safe to call from
the patching framework.

This patch reworks the alternatives cache-flushing code so that it rolls
its own internal D-cache maintenance using DC CIVAC before invalidating
the entire I-cache after all alternatives have been applied at boot.
Modules don't cause any issues, since flush_icache_range() is safe to
call by the time they are loaded.

Acked-by: Mark Rutland <mark.rutland@arm.com>
Reported-by: Rohit Khanna <rokhanna@nvidia.com>
Cc: Alexander Van Brunt <avanbrunt@nvidia.com>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
1 parent 7838306
History
Tip revision: 429388682dc266e7a693f9c27e3aabd341d55343 authored by Will Deacon on 22 June 2018, 08:31:15 UTC
arm64: Avoid flush_icache_range() in alternatives patching code
Tip revision: 4293886
File Mode Size
Documentation
LICENSES
arch
block
certs
crypto
drivers
firmware
fs
include
init
ipc
kernel
lib
mm
net
samples
scripts
security
sound
tools
usr
virt
.clang-format -rw-r--r-- 12.8 KB
.cocciconfig -rw-r--r-- 59 bytes
.get_maintainer.ignore -rw-r--r-- 31 bytes
.gitattributes -rw-r--r-- 30 bytes
.gitignore -rw-r--r-- 1.5 KB
.mailmap -rw-r--r-- 9.3 KB
COPYING -rw-r--r-- 423 bytes
CREDITS -rw-r--r-- 96.3 KB
Kbuild -rw-r--r-- 2.2 KB
Kconfig -rw-r--r-- 321 bytes
MAINTAINERS -rw-r--r-- 449.0 KB
Makefile -rw-r--r-- 58.3 KB
README -rw-r--r-- 800 bytes

README

back to top