diff options
| -rw-r--r-- | drivers/iommu/amd/amd_iommu_types.h | 1 | ||||
| -rw-r--r-- | drivers/iommu/amd/iommu.c | 12 |
2 files changed, 13 insertions, 0 deletions
diff --git a/drivers/iommu/amd/amd_iommu_types.h b/drivers/iommu/amd/amd_iommu_types.h index d1fed5fc219b..03442e86ae44 100644 --- a/drivers/iommu/amd/amd_iommu_types.h +++ b/drivers/iommu/amd/amd_iommu_types.h @@ -813,6 +813,7 @@ struct iommu_dev_data { struct device *dev; u16 devid; /* PCI Device ID */ + u32 max_pasids; /* Max supported PASIDs */ u32 flags; /* Holds AMD_IOMMU_DEVICE_FLAG_<*> */ int ats_qdep; u8 ats_enabled :1; /* ATS state */ diff --git a/drivers/iommu/amd/iommu.c b/drivers/iommu/amd/iommu.c index 0decab958106..7daf6d75d964 100644 --- a/drivers/iommu/amd/iommu.c +++ b/drivers/iommu/amd/iommu.c @@ -2104,6 +2104,7 @@ static struct iommu_device *amd_iommu_probe_device(struct device *dev) { struct iommu_device *iommu_dev; struct amd_iommu *iommu; + struct iommu_dev_data *dev_data; int ret; if (!check_device(dev)) @@ -2130,6 +2131,17 @@ static struct iommu_device *amd_iommu_probe_device(struct device *dev) iommu_dev = &iommu->iommu; } + /* + * If IOMMU and device supports PASID then it will contain max + * supported PASIDs, else it will be zero. + */ + dev_data = dev_iommu_priv_get(dev); + if (amd_iommu_pasid_supported() && dev_is_pci(dev) && + pdev_pasid_supported(dev_data)) { + dev_data->max_pasids = min_t(u32, iommu->iommu.max_pasids, + pci_max_pasids(to_pci_dev(dev))); + } + iommu_completion_wait(iommu); return iommu_dev; |