From ffec219770dadd32171e6dd927e1d83d3218529f Mon Sep 17 00:00:00 2001 From: Joerg Roedel Date: Tue, 26 Jul 2016 15:31:23 +0200 Subject: iommu/amd: Initialize dma-ops domains with 3-level page-table 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 --- drivers/iommu/amd_iommu.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/iommu') diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c index 9703913f6bdd..33c177ba93be 100644 --- a/drivers/iommu/amd_iommu.c +++ b/drivers/iommu/amd_iommu.c @@ -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) -- cgit v1.2.1