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| author | Christoph Hellwig <hch@lst.de> | 2019-07-23 12:33:12 +0300 |
|---|---|---|
| committer | Christoph Hellwig <hch@lst.de> | 2019-07-24 18:29:01 +0300 |
| commit | ad3c7b18c5b362be5dbd0f2c0bcf1fd5fd659315 (patch) | |
| tree | 047eca0078eb5dc66bedf61319e3cea0b071870d /arch/arm/mm/Kconfig | |
| parent | 66d7780f18eae0232827fcffeaded39a6a168236 (diff) | |
| download | linux-ad3c7b18c5b362be5dbd0f2c0bcf1fd5fd659315.tar.xz | |
arm: use swiotlb for bounce buffering on LPAE configs
The DMA API requires that 32-bit DMA masks are always supported, but on
arm LPAE configs they do not currently work when memory is present
above 4GB. Wire up the swiotlb code like for all other architectures
to provide the bounce buffering in that case.
Fixes: 21e07dba9fb11 ("scsi: reduce use of block bounce buffers").
Reported-by: Roger Quadros <rogerq@ti.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Tested-by: Vignesh Raghavendra <vigneshr@ti.com>
Diffstat (limited to 'arch/arm/mm/Kconfig')
| -rw-r--r-- | arch/arm/mm/Kconfig | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/arch/arm/mm/Kconfig b/arch/arm/mm/Kconfig index 820b60a50125..c54cd7ed90ba 100644 --- a/arch/arm/mm/Kconfig +++ b/arch/arm/mm/Kconfig @@ -663,6 +663,11 @@ config ARM_LPAE depends on MMU && CPU_32v7 && !CPU_32v6 && !CPU_32v5 && \ !CPU_32v4 && !CPU_32v3 select PHYS_ADDR_T_64BIT + select SWIOTLB + select ARCH_HAS_DMA_COHERENT_TO_PFN + select ARCH_HAS_DMA_MMAP_PGPROT + select ARCH_HAS_SYNC_DMA_FOR_DEVICE + select ARCH_HAS_SYNC_DMA_FOR_CPU help Say Y if you have an ARMv7 processor supporting the LPAE page table format and you would like to access memory beyond the |