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| author | Joerg Roedel <joerg.roedel@amd.com> | 2010-05-31 15:05:20 +0200 |
|---|---|---|
| committer | Joerg Roedel <joerg.roedel@amd.com> | 2010-06-01 10:20:15 +0200 |
| commit | d7f0776975334070a93370ae048fda0c31a91c38 (patch) | |
| tree | e1eb9681756be538f8108a1b1fd54f8b1eb0e294 /arch/x86/kernel/amd_iommu.c | |
| parent | e82752d8b5a7e0a5e4d607fd8713549e2a4e2741 (diff) | |
| download | kernel_samsung_crespo-d7f0776975334070a93370ae048fda0c31a91c38.tar.gz kernel_samsung_crespo-d7f0776975334070a93370ae048fda0c31a91c38.tar.bz2 kernel_samsung_crespo-d7f0776975334070a93370ae048fda0c31a91c38.zip | |
x86/amd-iommu: Fall back to GART if initialization fails
This patch implements a fallback to the GART IOMMU if this
is possible and the AMD IOMMU initialization failed.
Otherwise the fallback would be nommu which is very
problematic on machines with more than 4GB of memory or
swiotlb which hurts io-performance.
Cc: stable@kernel.org
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Diffstat (limited to 'arch/x86/kernel/amd_iommu.c')
| -rw-r--r-- | arch/x86/kernel/amd_iommu.c | 4 |
1 files changed, 0 insertions, 4 deletions
diff --git a/arch/x86/kernel/amd_iommu.c b/arch/x86/kernel/amd_iommu.c index 8a9aaa8412c..0d20286d78c 100644 --- a/arch/x86/kernel/amd_iommu.c +++ b/arch/x86/kernel/amd_iommu.c @@ -2330,10 +2330,6 @@ int __init amd_iommu_init_dma_ops(void) iommu_detected = 1; swiotlb = 0; -#ifdef CONFIG_GART_IOMMU - gart_iommu_aperture_disabled = 1; - gart_iommu_aperture = 0; -#endif /* Make the driver finally visible to the drivers */ dma_ops = &amd_iommu_dma_ops; |