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authorJoerg Roedel <joerg.roedel@amd.com>2009-09-02 16:55:24 +0200
committerJoerg Roedel <joerg.roedel@amd.com>2009-09-03 16:03:49 +0200
commit8f7a017ce05ed4522809448e169daa44fe6edeb1 (patch)
treea1c59481bfa6bd9a0eea9783bff84af65b5fb02e /arch/x86/kernel
parentbad1cac28a707c69301a4d0612da9ccbecd51953 (diff)
x86/amd-iommu: Use 2-level page tables for dma_ops domains
The driver now supports a dynamic number of levels for IO page tables. This allows to reduce the number of levels for dma_ops domains by one because a dma_ops domain has usually an address space size between 128MB and 4G. Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Diffstat (limited to 'arch/x86/kernel')
-rw-r--r--arch/x86/kernel/amd_iommu.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/kernel/amd_iommu.c b/arch/x86/kernel/amd_iommu.c
index 6ffb3e63765..addf6588c36 100644
--- a/arch/x86/kernel/amd_iommu.c
+++ b/arch/x86/kernel/amd_iommu.c
@@ -1010,7 +1010,7 @@ static struct dma_ops_domain *dma_ops_domain_alloc(struct amd_iommu *iommu)
dma_dom->domain.id = domain_id_alloc();
if (dma_dom->domain.id == 0)
goto free_dma_dom;
- dma_dom->domain.mode = PAGE_MODE_3_LEVEL;
+ dma_dom->domain.mode = PAGE_MODE_2_LEVEL;
dma_dom->domain.pt_root = (void *)get_zeroed_page(GFP_KERNEL);
dma_dom->domain.flags = PD_DMA_OPS_MASK;
dma_dom->domain.priv = dma_dom;