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x86/amd-iommu: Use fetch_pte in amd_iommu_iova_to_phys

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Don't reimplement the page table walker in this function.
Use the generic one.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
This commit is contained in:
Joerg Roedel 2009-09-02 17:08:55 +02:00
parent 38a76eeeaf
commit a6d41a4027
1 changed files with 2 additions and 14 deletions
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16
arch/x86/kernel/amd_iommu.c
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@ -2140,21 +2140,9 @@ static phys_addr_t amd_iommu_iova_to_phys(struct iommu_domain *dom,
phys_addr_t paddr;
u64 *pte;
pte = &domain->pt_root[IOMMU_PTE_L2_INDEX(iova)];
pte = fetch_pte(domain, iova);
if (!IOMMU_PTE_PRESENT(*pte))
return 0;
pte = IOMMU_PTE_PAGE(*pte);
pte = &pte[IOMMU_PTE_L1_INDEX(iova)];
if (!IOMMU_PTE_PRESENT(*pte))
return 0;
pte = IOMMU_PTE_PAGE(*pte);
pte = &pte[IOMMU_PTE_L0_INDEX(iova)];
if (!IOMMU_PTE_PRESENT(*pte))
if (!pte || !IOMMU_PTE_PRESENT(*pte))
return 0;
paddr = *pte & IOMMU_PAGE_MASK;