From: Jacob Pan <jacob.jun.pan@linux.intel.com>
Date: Thu, 2 Jan 2020 08:18:05 +0800
Subject: iommu/vt-d: Reject SVM bind for failed capability check
Git-commit: 6eba09a4b5d583ad18a2a1fd1b82aee8cc3ac542
Patch-mainline: v5.6-rc1
References: bsc#1175713
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>
---
drivers/iommu/intel-svm.c | 3 +++
1 file changed, 3 insertions(+)
diff --git a/drivers/iommu/intel-svm.c b/drivers/iommu/intel-svm.c
index e4a5d542b84f..48205ab1fea4 100644
--- a/drivers/iommu/intel-svm.c
+++ b/drivers/iommu/intel-svm.c
@@ -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)