intel-iommu: Create new iommu_domain_identity_map() function
We'll want to do this to a _domain_ (the si_domain) rather than a PCI device. Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
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@ -1849,25 +1849,12 @@ error:
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static int iommu_identity_mapping;
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static int iommu_prepare_identity_map(struct pci_dev *pdev,
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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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struct dmar_domain *domain;
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unsigned long size;
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unsigned long long base;
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int ret;
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printk(KERN_INFO
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"IOMMU: Setting identity map for device %s [0x%Lx - 0x%Lx]\n",
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pci_name(pdev), start, end);
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if (iommu_identity_mapping)
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domain = si_domain;
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else
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/* page table init */
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domain = get_domain_for_dev(pdev, DEFAULT_DOMAIN_ADDRESS_WIDTH);
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if (!domain)
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return -ENOMEM;
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/* The address might not be aligned */
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base = start & PAGE_MASK;
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@ -1876,31 +1863,54 @@ static int iommu_prepare_identity_map(struct pci_dev *pdev,
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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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printk(KERN_ERR "IOMMU: reserve iova failed\n");
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ret = -ENOMEM;
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goto error;
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return -ENOMEM;
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}
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pr_debug("Mapping reserved region %lx@%llx for %s\n",
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size, base, pci_name(pdev));
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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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/*
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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, base + size);
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ret = domain_page_mapping(domain, base, base, size,
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return domain_page_mapping(domain, base, base, size,
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DMA_PTE_READ|DMA_PTE_WRITE);
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}
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static int iommu_prepare_identity_map(struct pci_dev *pdev,
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unsigned long long start,
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unsigned long long end)
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{
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struct dmar_domain *domain;
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int ret;
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printk(KERN_INFO
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"IOMMU: Setting identity map for device %s [0x%Lx - 0x%Lx]\n",
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pci_name(pdev), start, end);
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if (iommu_identity_mapping)
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domain = si_domain;
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else
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/* page table init */
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domain = get_domain_for_dev(pdev, DEFAULT_DOMAIN_ADDRESS_WIDTH);
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if (!domain)
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return -ENOMEM;
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ret = iommu_domain_identity_map(domain, start, end);
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if (ret)
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goto error;
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/* context entry init */
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ret = domain_context_mapping(domain, pdev, CONTEXT_TT_MULTI_LEVEL);
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if (!ret)
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if (ret)
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goto error;
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return 0;
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error:
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domain_exit(domain);
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return ret;
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}
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static inline int iommu_prepare_rmrr_dev(struct dmar_rmrr_unit *rmrr,
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