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| author | Joerg Roedel <jroedel@suse.de> | 2015-07-28 16:58:51 +0200 |
|---|---|---|
| committer | Joerg Roedel <jroedel@suse.de> | 2015-07-30 10:28:48 +0200 |
| commit | 52717828356b643a1650fca845b4af488a954cca (patch) | |
| tree | 2d5a6e86acf90f547f0c309ff5aa0241b0ed5025 /drivers/iommu/amd_iommu.c | |
| parent | iommu/amd: Use swiotlb in passthrough mode (diff) | |
| download | linux-52717828356b643a1650fca845b4af488a954cca.tar.xz linux-52717828356b643a1650fca845b4af488a954cca.zip | |
iommu/amd: Set global dma_ops if swiotlb is disabled
Some AMD systems also have non-PCI devices which can do DMA.
Those can't be handled by the AMD IOMMU, as the hardware can
only handle PCI. These devices would end up with no dma_ops,
as neither the per-device nor the global dma_ops will get
set. SWIOTLB provides global dma_ops when it is active, so
make sure there are global dma_ops too when swiotlb is
disabled.
Signed-off-by: Joerg Roedel <jroedel@suse.de>
Diffstat (limited to 'drivers/iommu/amd_iommu.c')
| -rw-r--r-- | drivers/iommu/amd_iommu.c | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c index e29baa6c64e3..fa9508bb76dd 100644 --- a/drivers/iommu/amd_iommu.c +++ b/drivers/iommu/amd_iommu.c @@ -2853,6 +2853,15 @@ int __init amd_iommu_init_dma_ops(void) swiotlb = iommu_pass_through ? 1 : 0; iommu_detected = 1; + /* + * In case we don't initialize SWIOTLB (actually the common case + * when AMD IOMMU is enabled), make sure there are global + * dma_ops set as a fall-back for devices not handled by this + * driver (for example non-PCI devices). + */ + if (!swiotlb) + dma_ops = &nommu_dma_ops; + amd_iommu_stats_init(); if (amd_iommu_unmap_flush) |