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authorChristoph Hellwig <hch@lst.de>2018-10-08 09:12:01 +0200
committerChristoph Hellwig <hch@lst.de>2018-10-19 08:53:24 +0200
commit886643b766321f15f63bd950be618cbb6dd22bbc (patch)
treed84cbe166a610723a06937fbb09c89ffcb608246 /arch/arm64/Kconfig
parentswiotlb: add support for non-coherent DMA (diff)
downloadlinux-dev-886643b766321f15f63bd950be618cbb6dd22bbc.tar.xz
linux-dev-886643b766321f15f63bd950be618cbb6dd22bbc.zip
arm64: use the generic swiotlb_dma_ops
Now that the generic swiotlb code supports non-coherent DMA we can switch to it for arm64. For that we need to refactor the existing alloc/free/mmap/pgprot helpers to be used as the architecture hooks, and implement the standard arch_sync_dma_for_{device,cpu} hooks for cache maintaincance in the streaming dma hooks, which also implies using the generic dma_coherent flag in struct device. Note that we need to keep the old is_device_dma_coherent function around for now, so that the shared arm/arm64 Xen code keeps working. Signed-off-by: Christoph Hellwig <hch@lst.de> Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to '')
-rw-r--r--arch/arm64/Kconfig4
1 files changed, 4 insertions, 0 deletions
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig
index 1b1a0e95c751..c4db5131d837 100644
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
@@ -11,6 +11,8 @@ config ARM64
select ARCH_CLOCKSOURCE_DATA
select ARCH_HAS_DEBUG_VIRTUAL
select ARCH_HAS_DEVMEM_IS_ALLOWED
+ select ARCH_HAS_DMA_COHERENT_TO_PFN
+ select ARCH_HAS_DMA_MMAP_PGPROT
select ARCH_HAS_ACPI_TABLE_UPGRADE if ACPI
select ARCH_HAS_ELF_RANDOMIZE
select ARCH_HAS_FAST_MULTIPLIER
@@ -24,6 +26,8 @@ config ARM64
select ARCH_HAS_SG_CHAIN
select ARCH_HAS_STRICT_KERNEL_RWX
select ARCH_HAS_STRICT_MODULE_RWX
+ select ARCH_HAS_SYNC_DMA_FOR_DEVICE
+ select ARCH_HAS_SYNC_DMA_FOR_CPU
select ARCH_HAS_SYSCALL_WRAPPER
select ARCH_HAS_TICK_BROADCAST if GENERIC_CLOCKEVENTS_BROADCAST
select ARCH_HAVE_NMI_SAFE_CMPXCHG