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iommu/vt-d: Reject SVM bind for failed capability check 

Add a check during SVM bind to ensure CPU and IOMMU hardware capabilities
are met.

Signed-off-by: Jacob Pan <jacob.jun.pan@linux.intel.com>
Reviewed-by: Eric Auger <eric.auger@redhat.com>
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Jacob Pan 2020-01-02 08:18:05 +08:00 committed by Joerg Roedel
parent 79db7e1b4c
commit 6eba09a4b5
1 changed files with 3 additions and 0 deletions
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3
drivers/iommu/intel-svm.c
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@ -234,6 +234,9 @@ int intel_svm_bind_mm(struct device *dev, int *pasid, int flags, struct svm_dev_
if (!iommu || dmar_disabled)
return -EINVAL;
if (!intel_svm_capable(iommu))
return -ENOTSUPP;
if (dev_is_pci(dev)) {
pasid_max = pci_max_pasids(to_pci_dev(dev));
if (pasid_max < 0)