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(parent: fdb4f05) | patch
x86/amd-iommu: Fall back to GART if initialization fails
authorJoerg Roedel <joerg.roedel@amd.com>
Mon, 31 May 2010 13:05:20 +0000 (15:05 +0200)
committerGreg Kroah-Hartman <gregkh@suse.de>
Mon, 5 Jul 2010 18:22:24 +0000 (11:22 -0700)
commitd3c0c33429f930d2934fa7597e874306c07521f2
treeda5f8402de403674b56f839c261645f8a25626c2tree
parentfdb4f05da375cad6e74a6ba5d07dbb7a97d5c8c7commit | diff
x86/amd-iommu: Fall back to GART if initialization fails

commit d7f0776975334070a93370ae048fda0c31a91c38 upstream.

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.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
arch/x86/kernel/amd_iommu.c diff | blob | history
arch/x86/kernel/amd_iommu_init.c diff | blob | history
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