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iommu/amd: Initialize dma-ops domains with 3-level page-table

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A two-level page-table can map up to 1GB of address space.
With the IOVA allocator now in use, the allocated addresses
are often more closely to 4G, which requires the address
space to be increased much more often. Avoid that by using a
three-level page-table by default.

Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Joerg Roedel 2016-07-26 15:31:23 +02:00
parent 3254de6bf7
commit ffec219770
1 changed files with 1 additions and 1 deletions
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2
drivers/iommu/amd_iommu.c
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@ -1673,7 +1673,7 @@ static struct dma_ops_domain *dma_ops_domain_alloc(void)
if (protection_domain_init(&dma_dom->domain))
goto free_dma_dom;
dma_dom->domain.mode = PAGE_MODE_2_LEVEL;
dma_dom->domain.mode = PAGE_MODE_3_LEVEL;
dma_dom->domain.pt_root = (void *)get_zeroed_page(GFP_KERNEL);
dma_dom->domain.flags = PD_DMA_OPS_MASK;
if (!dma_dom->domain.pt_root)