| commit | d7f0776975334070a93370ae048fda0c31a91c38 | |
| author | Joerg Roedel <joerg.roedel@amd.com> | |
| Mon, 31 May 2010 13:05:20 +0000 (31 15:05 +0200) | ||
| committer | Joerg Roedel <joerg.roedel@amd.com> | |
| Tue, 1 Jun 2010 08:20:15 +0000 (1 10:20 +0200) | ||
| tree | e1eb9681756be538f8108a1b1fd54f8b1eb0e294 | treesnapshot (tar.gz zip) |
| parent | e82752d8b5a7e0a5e4d607fd8713549e2a4e2741 | commitdiff |
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>
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>
| arch/x86/kernel/amd_iommu.c | diffblobblamehistory | |
| arch/x86/kernel/amd_iommu_init.c | diffblobblamehistory |