From 3f251cf0abec2afb6eca67f71380670dd55bdebe Mon Sep 17 00:00:00 2001 From: Will Deacon Date: Tue, 27 Mar 2018 12:04:51 +0100 Subject: Revert "arm64: Revert L1_CACHE_SHIFT back to 6 (64-byte cache line size)" This reverts commit 1f85b42a691cd8329ba82dbcaeec80ac1231b32a. The internal dma-direct.h API has changed in -next, which collides with us trying to use it to manage non-coherent DMA devices on systems with unreasonably large cache writeback granules. This isn't at all trivial to resolve, so revert our changes for now and we can revisit this after the merge window. Effectively, this just restores our behaviour back to that of 4.16. Signed-off-by: Will Deacon --- arch/arm64/include/asm/cache.h | 6 +++--- 1 file changed, 3 insertions(+), 3 deletions(-) (limited to 'arch/arm64/include/asm/cache.h') diff --git a/arch/arm64/include/asm/cache.h b/arch/arm64/include/asm/cache.h index 5df5cfe1c143..9bbffc7a301f 100644 --- a/arch/arm64/include/asm/cache.h +++ b/arch/arm64/include/asm/cache.h @@ -33,7 +33,7 @@ #define ICACHE_POLICY_VIPT 2 #define ICACHE_POLICY_PIPT 3 -#define L1_CACHE_SHIFT (6) +#define L1_CACHE_SHIFT 7 #define L1_CACHE_BYTES (1 << L1_CACHE_SHIFT) /* @@ -43,7 +43,7 @@ * cache before the transfer is done, causing old data to be seen by * the CPU. */ -#define ARCH_DMA_MINALIGN (128) +#define ARCH_DMA_MINALIGN L1_CACHE_BYTES #ifndef __ASSEMBLY__ @@ -77,7 +77,7 @@ static inline u32 cache_type_cwg(void) static inline int cache_line_size(void) { u32 cwg = cache_type_cwg(); - return cwg ? 4 << cwg : ARCH_DMA_MINALIGN; + return cwg ? 4 << cwg : L1_CACHE_BYTES; } #endif /* __ASSEMBLY__ */ -- cgit