From 5d7c94c3f4f20964b217d64ee44a9a08320c315a Mon Sep 17 00:00:00 2001 From: Joerg Roedel Date: Wed, 1 Apr 2015 14:58:50 +0200 Subject: [PATCH] iommu/amd: Optimize alloc_new_range for new fetch_pte interface Now that fetch_pte returns the page-size of the pte, the call in this function can also be optimized a little bit. Tested-by: Suravee Suthikulpanit Signed-off-by: Joerg Roedel --- drivers/iommu/amd_iommu.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/drivers/iommu/amd_iommu.c b/drivers/iommu/amd_iommu.c index c9ee444d8209..f97441b6aaad 100644 --- a/drivers/iommu/amd_iommu.c +++ b/drivers/iommu/amd_iommu.c @@ -1591,7 +1591,7 @@ static int alloc_new_range(struct dma_ops_domain *dma_dom, { int index = dma_dom->aperture_size >> APERTURE_RANGE_SHIFT; struct amd_iommu *iommu; - unsigned long i, old_size; + unsigned long i, old_size, pte_pgsize; #ifdef CONFIG_IOMMU_STRESS populate = false; @@ -1664,13 +1664,13 @@ static int alloc_new_range(struct dma_ops_domain *dma_dom, */ for (i = dma_dom->aperture[index]->offset; i < dma_dom->aperture_size; - i += PAGE_SIZE) { - unsigned long pte_pgsize; + i += pte_pgsize) { u64 *pte = fetch_pte(&dma_dom->domain, i, &pte_pgsize); if (!pte || !IOMMU_PTE_PRESENT(*pte)) continue; - dma_ops_reserve_addresses(dma_dom, i >> PAGE_SHIFT, 1); + dma_ops_reserve_addresses(dma_dom, i >> PAGE_SHIFT, + pte_pgsize >> 12); } update_domain(&dma_dom->domain); -- GitLab