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23 October 2021, 00:29:24 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
.gitignore -rw-r--r-- 151 bytes
Kconfig -rw-r--r-- 7.8 KB
Makefile -rw-r--r-- 2.0 KB
gen_init_cpio.c -rw-r--r-- 12.8 KB
initramfs_data.S -rw-r--r-- 1.3 KB
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