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| author | Christoph Hellwig <hch@lst.de> | 2018-09-11 09:55:28 +0300 |
|---|---|---|
| committer | Christoph Hellwig <hch@lst.de> | 2018-09-20 10:01:16 +0300 |
| commit | 58b0440663ec11372befb8ead0ee7099d8878590 (patch) | |
| tree | c613ed22ad229e6612d8c71888d2bb8139163ea8 /arch/microblaze/Kconfig | |
| parent | bc3ec75de5452db59b683487867ba562b950708a (diff) | |
| download | linux-58b0440663ec11372befb8ead0ee7099d8878590.tar.xz | |
dma-mapping: consolidate the dma mmap implementations
The only functional differences (modulo a few missing fixes in the arch
code) is that architectures without coherent caches need a hook to
convert a virtual or dma address into a pfn, given that we don't have
the kernel linear mapping available for the otherwise easy virt_to_page
call. As a side effect we can support mmap of the per-device coherent
area even on architectures not providing the callback, and we make
previous dangerous default methods dma_common_mmap actually save for
non-coherent architectures by rejecting it without the right helper.
In addition to that we need a hook so that some architectures can
override the protection bits when mmaping a dma coherent allocations.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Acked-by: Paul Burton <paul.burton@mips.com> # MIPS parts
Diffstat (limited to 'arch/microblaze/Kconfig')
| -rw-r--r-- | arch/microblaze/Kconfig | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/microblaze/Kconfig b/arch/microblaze/Kconfig index 0f48ab6a8070..164a4857737a 100644 --- a/arch/microblaze/Kconfig +++ b/arch/microblaze/Kconfig @@ -1,6 +1,7 @@ config MICROBLAZE def_bool y select ARCH_NO_SWAP + select ARCH_HAS_DMA_COHERENT_TO_PFN if MMU select ARCH_HAS_GCOV_PROFILE_ALL select ARCH_HAS_SYNC_DMA_FOR_CPU select ARCH_HAS_SYNC_DMA_FOR_DEVICE @@ -12,7 +13,6 @@ config MICROBLAZE select CLONE_BACKWARDS3 select COMMON_CLK select DMA_DIRECT_OPS - select DMA_NONCOHERENT_MMAP select GENERIC_ATOMIC64 select GENERIC_CLOCKEVENTS select GENERIC_CPU_DEVICES |