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-rw-r--r--drivers/iommu/intel-iommu.c18
1 files changed, 18 insertions, 0 deletions
diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c
index a13b723ca38d..ed7de7420b3c 100644
--- a/drivers/iommu/intel-iommu.c
+++ b/drivers/iommu/intel-iommu.c
@@ -5944,6 +5944,14 @@ intel_iommu_dev_has_feat(struct device *dev, enum iommu_dev_features feat)
return !!siov_find_pci_dvsec(to_pci_dev(dev));
}
+ if (feat == IOMMU_DEV_FEAT_SVA) {
+ struct device_domain_info *info = get_domain_info(dev);
+
+ return info && (info->iommu->flags & VTD_FLAG_SVM_CAPABLE) &&
+ info->pasid_supported && info->pri_supported &&
+ info->ats_supported;
+ }
+
return false;
}
@@ -5953,6 +5961,16 @@ intel_iommu_dev_enable_feat(struct device *dev, enum iommu_dev_features feat)
if (feat == IOMMU_DEV_FEAT_AUX)
return intel_iommu_enable_auxd(dev);
+ if (feat == IOMMU_DEV_FEAT_SVA) {
+ struct device_domain_info *info = get_domain_info(dev);
+
+ if (!info)
+ return -EINVAL;
+
+ if (info->iommu->flags & VTD_FLAG_SVM_CAPABLE)
+ return 0;
+ }
+
return -ENODEV;
}