With all the infrastructure in place for bouncing small kmalloc() buffers, add the corresponding Kconfig entry and select it for arm64. Signed-off-by: Catalin Marinas <catalin.marinas@xxxxxxx> Cc: Will Deacon <will@xxxxxxxxxx> Cc: Christoph Hellwig <hch@xxxxxx> Cc: Robin Murphy <robin.murphy@xxxxxxx> --- arch/arm64/Kconfig | 1 + kernel/dma/Kconfig | 8 ++++++++ 2 files changed, 9 insertions(+) diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index 3991cb7b8a33..f889cf16e6ab 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -100,6 +100,7 @@ config ARM64 select ARCH_WANT_FRAME_POINTERS select ARCH_WANT_HUGE_PMD_SHARE if ARM64_4K_PAGES || (ARM64_16K_PAGES && !ARM64_VA_BITS_36) select ARCH_WANT_HUGETLB_PAGE_OPTIMIZE_VMEMMAP + select ARCH_WANT_KMALLOC_DMA_BOUNCE select ARCH_WANT_LD_ORPHAN_WARN select ARCH_WANTS_NO_INSTR select ARCH_WANTS_THP_SWAP if ARM64_4K_PAGES diff --git a/kernel/dma/Kconfig b/kernel/dma/Kconfig index d6fab8e3cbae..b56e76371023 100644 --- a/kernel/dma/Kconfig +++ b/kernel/dma/Kconfig @@ -86,6 +86,14 @@ config SWIOTLB bool select NEED_DMA_MAP_STATE +config ARCH_WANT_KMALLOC_DMA_BOUNCE + bool + +config DMA_BOUNCE_UNALIGNED_KMALLOC + def_bool y + depends on ARCH_WANT_KMALLOC_DMA_BOUNCE + depends on SWIOTLB && !SLOB + config DMA_RESTRICTED_POOL bool "DMA Restricted Pool" depends on OF && OF_RESERVED_MEM && SWIOTLB
