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| author | Christoph Hellwig <hch@lst.de> | 2019-10-29 11:01:37 +0100 |
|---|---|---|
| committer | Christoph Hellwig <hch@lst.de> | 2019-11-11 10:52:15 +0100 |
| commit | 34dc0ea6bc960f1f57b2148f01a3f4da23f87013 (patch) | |
| tree | f6d10010989435562d0ece0971ed992febe6c26c /arch/microblaze | |
| parent | 4e1003aa56a7d60ddb048e43a7a51368fcfe36af (diff) | |
| download | linux-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/Kconfig | 1 |
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 |