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Diffstat (limited to 'arch/x86/kernel/amd_iommu.c')
-rw-r--r--arch/x86/kernel/amd_iommu.c9
1 files changed, 7 insertions, 2 deletions
diff --git a/arch/x86/kernel/amd_iommu.c b/arch/x86/kernel/amd_iommu.c
index a8fd9ebdc8e..331b318304e 100644
--- a/arch/x86/kernel/amd_iommu.c
+++ b/arch/x86/kernel/amd_iommu.c
@@ -50,7 +50,7 @@ static int dma_ops_unity_map(struct dma_ops_domain *dma_dom,
50/* returns !0 if the IOMMU is caching non-present entries in its TLB */ 50/* returns !0 if the IOMMU is caching non-present entries in its TLB */
51static int iommu_has_npcache(struct amd_iommu *iommu) 51static int iommu_has_npcache(struct amd_iommu *iommu)
52{ 52{
53 return iommu->cap & IOMMU_CAP_NPCACHE; 53 return iommu->cap & (1UL << IOMMU_CAP_NPCACHE);
54} 54}
55 55
56/**************************************************************************** 56/****************************************************************************
@@ -536,6 +536,9 @@ static void dma_ops_free_addresses(struct dma_ops_domain *dom,
536{ 536{
537 address >>= PAGE_SHIFT; 537 address >>= PAGE_SHIFT;
538 iommu_area_free(dom->bitmap, address, pages); 538 iommu_area_free(dom->bitmap, address, pages);
539
540 if (address + pages >= dom->next_bit)
541 dom->need_flush = true;
539} 542}
540 543
541/**************************************************************************** 544/****************************************************************************
@@ -992,8 +995,10 @@ static void __unmap_single(struct amd_iommu *iommu,
992 995
993 dma_ops_free_addresses(dma_dom, dma_addr, pages); 996 dma_ops_free_addresses(dma_dom, dma_addr, pages);
994 997
995 if (amd_iommu_unmap_flush) 998 if (amd_iommu_unmap_flush || dma_dom->need_flush) {
996 iommu_flush_pages(iommu, dma_dom->domain.id, dma_addr, size); 999 iommu_flush_pages(iommu, dma_dom->domain.id, dma_addr, size);
1000 dma_dom->need_flush = false;
1001 }
997} 1002}
998 1003
999/* 1004/*