On arm64, ARCH_DMA_MINALIGN is 128, larger than the cache line size on
most of the current platforms (typically 64). Select
ARCH_DMA_CACHE_LINE_SIZE and define ARCH_KMALLOC_MINALIGN to 8 (the
default for architectures without their own ARCH_DMA_MINALIGN). The
kmalloc() caches will be limited to the run-time value of
cache_line_size(). Typically, this will allow the additional
kmalloc-{64,192} caches on most arm64 platforms.
Signed-off-by: Catalin Marinas <catalin.marinas@xxxxxxx>
Cc: Will Deacon <will@xxxxxxxxxx>
---
arch/arm64/Kconfig | 1 +
arch/arm64/include/asm/cache.h | 1 +
2 files changed, 2 insertions(+)
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index b1201d25a8a4..d11340b41703 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -23,6 +23,7 @@ config ARM64
select ARCH_HAS_CURRENT_STACK_POINTER
select ARCH_HAS_DEBUG_VIRTUAL
select ARCH_HAS_DEBUG_VM_PGTABLE
+ select ARCH_HAS_DMA_CACHE_LINE_SIZE
select ARCH_HAS_DMA_PREP_COHERENT
select ARCH_HAS_ACPI_TABLE_UPGRADE if ACPI
select ARCH_HAS_FAST_MULTIPLIER
diff --git a/arch/arm64/include/asm/cache.h b/arch/arm64/include/asm/cache.h
index a51e6e8f3171..e24c10192636 100644
--- a/arch/arm64/include/asm/cache.h
+++ b/arch/arm64/include/asm/cache.h
@@ -33,6 +33,7 @@
* the CPU.
*/
#define ARCH_DMA_MINALIGN (128)
+#define ARCH_KMALLOC_MINALIGN (8)
#ifndef __ASSEMBLY__
