intel-iommu: Clean up iommu_domain_identity_map()
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
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@ -1861,31 +1861,25 @@ static int iommu_domain_identity_map(struct dmar_domain *domain,
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unsigned long long start,
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unsigned long long end)
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{
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unsigned long size;
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unsigned long long base;
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unsigned long first_vpfn = start >> VTD_PAGE_SHIFT;
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unsigned long last_vpfn = end >> VTD_PAGE_SHIFT;
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/* The address might not be aligned */
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base = start & PAGE_MASK;
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size = end - base;
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size = PAGE_ALIGN(size);
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if (!reserve_iova(&domain->iovad, IOVA_PFN(base),
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IOVA_PFN(base + size) - 1)) {
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if (!reserve_iova(&domain->iovad, dma_to_mm_pfn(first_vpfn),
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dma_to_mm_pfn(last_vpfn))) {
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printk(KERN_ERR "IOMMU: reserve iova failed\n");
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return -ENOMEM;
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}
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pr_debug("Mapping reserved region %lx@%llx for domain %d\n",
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size, base, domain->id);
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pr_debug("Mapping reserved region %llx-%llx for domain %d\n",
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start, end, domain->id);
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/*
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* RMRR range might have overlap with physical memory range,
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* clear it first
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*/
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dma_pte_clear_range(domain, base >> VTD_PAGE_SHIFT,
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(base + size - 1) >> VTD_PAGE_SHIFT);
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dma_pte_clear_range(domain, first_vpfn, last_vpfn);
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return domain_pfn_mapping(domain, base >> VTD_PAGE_SHIFT,
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base >> VTD_PAGE_SHIFT,
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size >> VTD_PAGE_SHIFT,
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return domain_pfn_mapping(domain, first_vpfn, first_vpfn,
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last_vpfn - first_vpfn + 1,
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DMA_PTE_READ|DMA_PTE_WRITE);
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}
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