diff options
| -rw-r--r-- | drivers/iommu/amd/amd_iommu_types.h | 3 | ||||
| -rw-r--r-- | drivers/iommu/amd/iommu.c | 46 |
2 files changed, 30 insertions, 19 deletions
diff --git a/drivers/iommu/amd/amd_iommu_types.h b/drivers/iommu/amd/amd_iommu_types.h index 87fa39c490e8..07f8919ee34e 100644 --- a/drivers/iommu/amd/amd_iommu_types.h +++ b/drivers/iommu/amd/amd_iommu_types.h @@ -811,7 +811,8 @@ struct iommu_dev_data { struct protection_domain *domain; /* Domain the device is bound to */ struct device *dev; u16 devid; /* PCI Device ID */ - bool iommu_v2; /* Device can make use of IOMMUv2 */ + + u32 flags; /* Holds AMD_IOMMU_DEVICE_FLAG_<*> */ int ats_qdep; u8 ats_enabled :1; /* ATS state */ u8 pri_tlp :1; /* PASID TLB required for diff --git a/drivers/iommu/amd/iommu.c b/drivers/iommu/amd/iommu.c index 4ee69ccdc17b..151f405686e3 100644 --- a/drivers/iommu/amd/iommu.c +++ b/drivers/iommu/amd/iommu.c @@ -319,24 +319,34 @@ static struct iommu_group *acpihid_device_group(struct device *dev) return entry->group; } -static bool pci_iommuv2_capable(struct pci_dev *pdev) +static inline bool pdev_pasid_supported(struct iommu_dev_data *dev_data) { - static const int caps[] = { - PCI_EXT_CAP_ID_PRI, - PCI_EXT_CAP_ID_PASID, - }; - int i, pos; + return (dev_data->flags & AMD_IOMMU_DEVICE_FLAG_PASID_SUP); +} - if (!pci_ats_supported(pdev)) - return false; +static u32 pdev_get_caps(struct pci_dev *pdev) +{ + int features; + u32 flags = 0; + + if (pci_ats_supported(pdev)) + flags |= AMD_IOMMU_DEVICE_FLAG_ATS_SUP; + + if (pci_pri_supported(pdev)) + flags |= AMD_IOMMU_DEVICE_FLAG_PRI_SUP; - for (i = 0; i < 2; ++i) { - pos = pci_find_ext_capability(pdev, caps[i]); - if (pos == 0) - return false; + features = pci_pasid_features(pdev); + if (features >= 0) { + flags |= AMD_IOMMU_DEVICE_FLAG_PASID_SUP; + + if (features & PCI_PASID_CAP_EXEC) + flags |= AMD_IOMMU_DEVICE_FLAG_EXEC_SUP; + + if (features & PCI_PASID_CAP_PRIV) + flags |= AMD_IOMMU_DEVICE_FLAG_PRIV_SUP; } - return true; + return flags; } /* @@ -396,8 +406,8 @@ static int iommu_init_device(struct amd_iommu *iommu, struct device *dev) * it'll be forced to go into translation mode. */ if ((iommu_default_passthrough() || !amd_iommu_force_isolation) && - dev_is_pci(dev) && pci_iommuv2_capable(to_pci_dev(dev))) { - dev_data->iommu_v2 = amd_iommu_gt_ppr_supported(); + dev_is_pci(dev) && amd_iommu_gt_ppr_supported()) { + dev_data->flags = pdev_get_caps(to_pci_dev(dev)); } dev_iommu_priv_set(dev, dev_data); @@ -1850,7 +1860,7 @@ static int attach_device(struct device *dev, goto out; } - if (dev_data->iommu_v2) { + if (pdev_pasid_supported(dev_data)) { if (pdev_pri_ats_enable(pdev) != 0) goto out; @@ -1916,7 +1926,7 @@ static void detach_device(struct device *dev) if (!dev_is_pci(dev)) goto out; - if (domain->flags & PD_IOMMUV2_MASK && dev_data->iommu_v2) + if (domain->flags & PD_IOMMUV2_MASK && pdev_pasid_supported(dev_data)) pdev_iommuv2_disable(to_pci_dev(dev)); else if (dev_data->ats_enabled) pci_disable_ats(to_pci_dev(dev)); @@ -2471,7 +2481,7 @@ static int amd_iommu_def_domain_type(struct device *dev) * and require remapping. * - SNP is enabled, because it prohibits DTE[Mode]=0. */ - if (dev_data->iommu_v2 && + if (pdev_pasid_supported(dev_data) && !cc_platform_has(CC_ATTR_MEM_ENCRYPT) && !amd_iommu_snp_en) { return IOMMU_DOMAIN_IDENTITY; |