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authorChristoph Hellwig <hch@lst.de>2019-10-29 11:01:37 +0100
committerChristoph Hellwig <hch@lst.de>2019-11-11 10:52:15 +0100
commit34dc0ea6bc960f1f57b2148f01a3f4da23f87013 (patch)
treef6d10010989435562d0ece0971ed992febe6c26c /arch/microblaze
parent4e1003aa56a7d60ddb048e43a7a51368fcfe36af (diff)
downloadlinux-34dc0ea6bc960f1f57b2148f01a3f4da23f87013.tar.bz2
dma-direct: provide mmap and get_sgtable method overrides
For dma-direct we know that the DMA address is an encoding of the physical address that we can trivially decode. Use that fact to provide implementations that do not need the arch_dma_coherent_to_pfn architecture hook. Note that we still can only support mmap of non-coherent memory only if the architecture provides a way to set an uncached bit in the page tables. This must be true for architectures that use the generic remap helpers, but other architectures can also manually select it. Signed-off-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Max Filippov <jcmvbkbc@gmail.com>
Diffstat (limited to 'arch/microblaze')
-rw-r--r--arch/microblaze/Kconfig1
1 files changed, 0 insertions, 1 deletions
diff --git a/arch/microblaze/Kconfig b/arch/microblaze/Kconfig
index c9c4be822456..261c26df1c9f 100644
--- a/arch/microblaze/Kconfig
+++ b/arch/microblaze/Kconfig
@@ -4,7 +4,6 @@ config MICROBLAZE
select ARCH_32BIT_OFF_T
select ARCH_NO_SWAP
select ARCH_HAS_BINFMT_FLAT if !MMU
- select ARCH_HAS_DMA_COHERENT_TO_PFN if MMU
select ARCH_HAS_DMA_PREP_COHERENT
select ARCH_HAS_GCOV_PROFILE_ALL
select ARCH_HAS_SYNC_DMA_FOR_CPU