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    Subject[PATCH 03/14] x86/amd-iommu: Use fetch_pte in amd_iommu_iova_to_phys
    Date
    Don't reimplement the page table walker in this function.
    Use the generic one.

    Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
    ---
    arch/x86/kernel/amd_iommu.c | 16 ++--------------
    1 files changed, 2 insertions(+), 14 deletions(-)

    diff --git a/arch/x86/kernel/amd_iommu.c b/arch/x86/kernel/amd_iommu.c
    index 5e52798..4a54366 100644
    --- a/arch/x86/kernel/amd_iommu.c
    +++ b/arch/x86/kernel/amd_iommu.c
    @@ -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;
    --
    1.6.3.3



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