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c1132702c7
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Will Deacon c1132702c7 Revert "arm64: cache: Lower ARCH_DMA_MINALIGN to 64 (L1_CACHE_BYTES)" 
This reverts commit 65688d2a05.

Unfortunately, the original Qualcomm Kryo cores integrated into the
MSM8996 SoC feature an L2 cache with 128-byte lines which sits above
the Point of Coherency. Consequently, we must restore ARCH_DMA_MINALIGN
to its former ugly self so that non-coherent DMA can be performed safely
on devices built using this SoC.

Thanks to Jeffrey Hugo for confirming this with a hardware designer.

Link: https://lore.kernel.org/r/CAOCk7NqdpUZFMSXfGjw0_1NaSK5gyTLgpS9kSdZn1jmBy-QkfA@mail.gmail.com/
Reported-by: Yassine Oudjana <y.oudjana@protonmail.com>
Link: https://lore.kernel.org/r/uHgsRacR8hJ7nW-I-pIcehzg-lNIn7NJvaL7bP9tfAftFsBjsgaY2qTjG9zyBgxHkjNL1WPNrD7YVv2JVD2_Wy-a5VTbcq-1xEi8ZnwrXBo=@protonmail.com
Signed-off-by: Will Deacon <will@kernel.org>
2021-07-12 13:37:34 +01:00
..
alpha Kbuild updates for v5.14 2021-07-10 11:01:38 -07:00
arc Kbuild updates for v5.14 2021-07-10 11:01:38 -07:00
arm Kbuild updates for v5.14 2021-07-10 11:01:38 -07:00
arm64 Revert "arm64: cache: Lower ARCH_DMA_MINALIGN to 64 (L1_CACHE_BYTES)" 2021-07-12 13:37:34 +01:00
csky Kbuild updates for v5.14 2021-07-10 11:01:38 -07:00
h8300 Kbuild updates for v5.14 2021-07-10 11:01:38 -07:00
hexagon Kbuild updates for v5.14 2021-07-10 11:01:38 -07:00
ia64 Kbuild updates for v5.14 2021-07-10 11:01:38 -07:00
m68k Kbuild updates for v5.14 2021-07-10 11:01:38 -07:00
microblaze Kbuild updates for v5.14 2021-07-10 11:01:38 -07:00
mips Two fixes: 2021-07-11 11:17:57 -07:00
nds32 Kbuild updates for v5.14 2021-07-10 11:01:38 -07:00
nios2 Kbuild updates for v5.14 2021-07-10 11:01:38 -07:00
openrisc Kbuild updates for v5.14 2021-07-10 11:01:38 -07:00
parisc Kbuild updates for v5.14 2021-07-10 11:01:38 -07:00
powerpc Kbuild updates for v5.14 2021-07-10 11:01:38 -07:00
riscv Kbuild updates for v5.14 2021-07-10 11:01:38 -07:00
s390 Kbuild updates for v5.14 2021-07-10 11:01:38 -07:00
sh Kbuild updates for v5.14 2021-07-10 11:01:38 -07:00
sparc Locking fixes: 2021-07-11 11:06:09 -07:00
um Kbuild updates for v5.14 2021-07-10 11:01:38 -07:00
x86 A fix and a hardware-enablement addition: 2021-07-11 11:10:48 -07:00
xtensa Kbuild updates for v5.14 2021-07-10 11:01:38 -07:00
.gitignore
Kconfig Kconfig: Introduce ARCH_WANTS_NO_INSTR and CC_HAS_NO_PROFILE_FN_ATTR 2021-06-22 11:07:18 -07:00