diff options
| -rw-r--r-- | drivers/iommu/intel-iommu.c | 61 |
1 files changed, 48 insertions, 13 deletions
diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c index a180f10a7b26..6fbce01b7875 100644 --- a/drivers/iommu/intel-iommu.c +++ b/drivers/iommu/intel-iommu.c @@ -2595,30 +2595,65 @@ static int iommu_should_identity_map(struct device *dev, int startup) return 1; } +static int __init dev_prepare_static_identity_mapping(struct device *dev, int hw) +{ + int ret; + + if (!iommu_should_identity_map(dev, 1)) + return 0; + + ret = domain_add_dev_info(si_domain, dev, + hw ? CONTEXT_TT_PASS_THROUGH : + CONTEXT_TT_MULTI_LEVEL); + if (!ret) + pr_info("IOMMU: %s identity mapping for device %s\n", + hw ? "hardware" : "software", dev_name(dev)); + else if (ret == -ENODEV) + /* device not associated with an iommu */ + ret = 0; + + return ret; +} + + static int __init iommu_prepare_static_identity_mapping(int hw) { struct pci_dev *pdev = NULL; - int ret; + struct dmar_drhd_unit *drhd; + struct intel_iommu *iommu; + struct device *dev; + int i; + int ret = 0; ret = si_domain_init(hw); if (ret) return -EFAULT; for_each_pci_dev(pdev) { - if (iommu_should_identity_map(&pdev->dev, 1)) { - ret = domain_add_dev_info(si_domain, &pdev->dev, - hw ? CONTEXT_TT_PASS_THROUGH : - CONTEXT_TT_MULTI_LEVEL); - if (ret) { - /* device not associated with an iommu */ - if (ret == -ENODEV) - continue; - return ret; + ret = dev_prepare_static_identity_mapping(&pdev->dev, hw); + if (ret) + return ret; + } + + for_each_active_iommu(iommu, drhd) + for_each_active_dev_scope(drhd->devices, drhd->devices_cnt, i, dev) { + struct acpi_device_physical_node *pn; + struct acpi_device *adev; + + if (dev->bus != &acpi_bus_type) + continue; + + adev= to_acpi_device(dev); + mutex_lock(&adev->physical_node_lock); + list_for_each_entry(pn, &adev->physical_node_list, node) { + ret = dev_prepare_static_identity_mapping(pn->dev, hw); + if (ret) + break; } - pr_info("IOMMU: %s identity mapping for device %s\n", - hw ? "hardware" : "software", pci_name(pdev)); + mutex_unlock(&adev->physical_node_lock); + if (ret) + return ret; } - } return 0; } |