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| author | Will Deacon <[email protected]> | 2018-06-22 08:31:15 +0000 |
|---|---|---|
| committer | Catalin Marinas <[email protected]> | 2018-06-27 17:21:53 +0000 |
| commit | 429388682dc266e7a693f9c27e3aabd341d55343 (patch) | |
| tree | adab7d6b539fcbddbe26923454597ca3dfd803d5 /drivers/gpu/drm/amd/amdgpu/amdgpu_test.c | |
| parent | Merge branch 'perf/fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/wi... (diff) | |
| download | kernel-429388682dc266e7a693f9c27e3aabd341d55343.tar.gz kernel-429388682dc266e7a693f9c27e3aabd341d55343.zip | |
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 <[email protected]>
Reported-by: Rohit Khanna <[email protected]>
Cc: Alexander Van Brunt <[email protected]>
Signed-off-by: Will Deacon <[email protected]>
Signed-off-by: Catalin Marinas <[email protected]>
Diffstat (limited to 'drivers/gpu/drm/amd/amdgpu/amdgpu_test.c')
0 files changed, 0 insertions, 0 deletions