diff options
| author | Christoph Hellwig <hch@lst.de> | 2018-03-19 11:38:15 +0100 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2018-03-20 10:01:56 +0100 |
| commit | fec777c385b6376048fc4b08f039366545b335cd (patch) | |
| tree | a613e68a5746d74d69bf3aa06818b05119d8e500 /drivers/iommu/amd_iommu.c | |
| parent | 038d07a283d62336b32cc23b62aecdf9418cfc11 (diff) | |
| download | op-kernel-dev-fec777c385b6376048fc4b08f039366545b335cd.zip op-kernel-dev-fec777c385b6376048fc4b08f039366545b335cd.tar.gz | |
x86/dma: Use DMA-direct (CONFIG_DMA_DIRECT_OPS=y)
The generic DMA-direct (CONFIG_DMA_DIRECT_OPS=y) implementation is now
functionally equivalent to the x86 nommu dma_map implementation, so
switch over to using it.
That includes switching from using x86_dma_supported in various IOMMU
drivers to use dma_direct_supported instead, which provides the same
functionality.
Tested-by: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Thomas Gleixner <tglx@linutronix.de>
Cc: David Woodhouse <dwmw2@infradead.org>
Cc: Joerg Roedel <joro@8bytes.org>
Cc: Jon Mason <jdmason@kudzu.us>
Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Muli Ben-Yehuda <mulix@mulix.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: iommu@lists.linux-foundation.org
Link: http://lkml.kernel.org/r/20180319103826.12853-4-hch@lst.de
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'drivers/iommu/amd_iommu.c')
| -rw-r--r-- | drivers/iommu/amd_iommu.c | 7 |
1 files changed, 4 insertions, 3 deletions
diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c index 74788fd..0bf1942 100644 --- a/drivers/iommu/amd_iommu.c +++ b/drivers/iommu/amd_iommu.c @@ -28,6 +28,7 @@ #include <linux/debugfs.h> #include <linux/scatterlist.h> #include <linux/dma-mapping.h> +#include <linux/dma-direct.h> #include <linux/iommu-helper.h> #include <linux/iommu.h> #include <linux/delay.h> @@ -2193,7 +2194,7 @@ static int amd_iommu_add_device(struct device *dev) dev_name(dev)); iommu_ignore_device(dev); - dev->dma_ops = &nommu_dma_ops; + dev->dma_ops = &dma_direct_ops; goto out; } init_iommu_group(dev); @@ -2680,7 +2681,7 @@ free_mem: */ static int amd_iommu_dma_supported(struct device *dev, u64 mask) { - if (!x86_dma_supported(dev, mask)) + if (!dma_direct_supported(dev, mask)) return 0; return check_device(dev); } @@ -2794,7 +2795,7 @@ int __init amd_iommu_init_dma_ops(void) * continue to be SWIOTLB. */ if (!swiotlb) - dma_ops = &nommu_dma_ops; + dma_ops = &dma_direct_ops; if (amd_iommu_unmap_flush) pr_info("AMD-Vi: IO/TLB flush on unmap enabled\n"); |
