Catalin Marinas 1f85b42a69 arm64: Revert L1_CACHE_SHIFT back to 6 (64-byte cache line size) ... Commit 9730348075 ("arm64: Increase the max granular size") increased the cache line size to 128 to match Cavium ThunderX, apparently for some performance benefit which could not be confirmed. This change, however, has an impact on the network packets allocation in certain circumstances, requiring slightly over a 4K page with a significant performance degradation. This patch reverts L1_CACHE_SHIFT back to 6 (64-byte cache line) while keeping ARCH_DMA_MINALIGN at 128. The cache_line_size() function was changed to default to ARCH_DMA_MINALIGN in the absence of a meaningful CTR_EL0.CWG bit field. In addition, if a system with ARCH_DMA_MINALIGN < CTR_EL0.CWG is detected, the kernel will force swiotlb bounce buffering for all non-coherent devices since DMA cache maintenance on sub-CWG ranges is not safe, leading to data corruption. Cc: Tirumalesh Chalamarla <tchalamarla@cavium.com> Cc: Timur Tabi <timur@codeaurora.org> Cc: Florian Fainelli <f.fainelli@gmail.com> Acked-by: Robin Murphy <robin.murphy@arm.com> Signed-off-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Will Deacon <will.deacon@arm.com>		2018-03-06 18:52:32 +00:00
..
boot	ARM: SoC device tree updates for 4.16	2018-02-01 16:07:54 -08:00
configs	ARM: SoC platform updates for 4.16	2018-02-01 16:17:40 -08:00
crypto	crypto: arm64/sha512 - fix/improve new v8.2 Crypto Extensions code	2018-01-26 01:10:36 +11:00
include	arm64: Revert L1_CACHE_SHIFT back to 6 (64-byte cache line size)	2018-03-06 18:52:32 +00:00
kernel	arm64: Revert L1_CACHE_SHIFT back to 6 (64-byte cache line size)	2018-03-06 18:52:32 +00:00
kvm	arm64: Add missing Falkor part number for branch predictor hardening	2018-02-12 11:28:45 +00:00
lib	arm64: lse: Pass -fomit-frame-pointer to out-of-line ll/sc atomics	2018-03-06 18:52:32 +00:00
mm	arm64: Revert L1_CACHE_SHIFT back to 6 (64-byte cache line size)	2018-03-06 18:52:32 +00:00
net	bpf, arm64: fix out of bounds access in tail call	2018-02-22 16:06:28 -08:00
xen	arm64: mm: Add additional parameter to uaccess_ttbr0_disable	2018-01-17 13:57:49 +01:00
Kconfig	arm64: Revert L1_CACHE_SHIFT back to 6 (64-byte cache line size)	2018-03-06 18:52:32 +00:00
Kconfig.debug	arm64: relocation testing module	2017-04-04 17:03:32 +01:00
Kconfig.platforms	clk: meson-axg: add clock controller drivers	2017-12-14 10:19:37 +01:00
Makefile	arm64: ftrace: emit ftrace-mod.o contents through code	2017-12-01 13:04:59 +00:00