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| author | Christoph Hellwig <hch@lst.de> | 2018-04-24 09:00:54 +0200 |
|---|---|---|
| committer | Christoph Hellwig <hch@lst.de> | 2018-05-09 06:58:01 +0200 |
| commit | 09230cbc1baba68e0ca1e7c489344ce5d35c6f27 (patch) | |
| tree | d125ba685e491df0cfb05660e30ece8a84a10643 /arch/powerpc | |
| parent | mips,unicore32: swiotlb doesn't need sg->dma_length (diff) | |
| download | linux-09230cbc1baba68e0ca1e7c489344ce5d35c6f27.tar.xz linux-09230cbc1baba68e0ca1e7c489344ce5d35c6f27.zip | |
swiotlb: move the SWIOTLB config symbol to lib/Kconfig
This way we have one central definition of it, and user can select it as
needed. The new option is not user visible, which is the behavior
it had in most architectures, with a few notable exceptions:
- On x86_64 and mips/loongson3 it used to be user selectable, but
defaulted to y. It now is unconditional, which seems like the right
thing for 64-bit architectures without guaranteed availablity of
IOMMUs.
- on powerpc the symbol is user selectable and defaults to n, but
many boards select it. This change assumes no working setup
required a manual selection, but if that turned out to be wrong
we'll have to add another select statement or two for the respective
boards.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Diffstat (limited to 'arch/powerpc')
| -rw-r--r-- | arch/powerpc/Kconfig | 9 |
1 files changed, 0 insertions, 9 deletions
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig index e5da6b40d42c..268fd46fc3c7 100644 --- a/arch/powerpc/Kconfig +++ b/arch/powerpc/Kconfig @@ -473,15 +473,6 @@ config MPROFILE_KERNEL depends on PPC64 && CPU_LITTLE_ENDIAN def_bool !DISABLE_MPROFILE_KERNEL -config SWIOTLB - bool "SWIOTLB support" - default n - ---help--- - Support for IO bounce buffering for systems without an IOMMU. - This allows us to DMA to the full physical address space on - platforms where the size of a physical address is larger - than the bus address. Not all platforms support this. - config HOTPLUG_CPU bool "Support for enabling/disabling CPUs" depends on SMP && (PPC_PSERIES || \ |