iv/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

iommu/vt-d: Fix clearing real DMA device's scalable-mode context entries

Browse Source 
The commit 2b0140c696 ("iommu/vt-d: Use pci_real_dma_dev() for mapping")
fixes an issue of "sub-device is removed where the context entry is cleared
for all aliases". But this commit didn't consider the PASID entry and PASID
table in VT-d scalable mode. This fix increases the coverage of scalable
mode.

Suggested-by: Sanjay Kumar <sanjay.k.kumar@intel.com>
Fixes: 8038bdb855 ("iommu/vt-d: Only clear real DMA device's context entries")
Fixes: 2b0140c696 ("iommu/vt-d: Use pci_real_dma_dev() for mapping")
Cc: stable@vger.kernel.org # v5.6+
Cc: Jon Derrick <jonathan.derrick@intel.com>
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Link: https://lore.kernel.org/r/20210712071712.3416949-1-baolu.lu@linux.intel.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Lu Baolu 2021-07-12 15:17:12 +08:00 committed by Joerg Roedel
parent 37764b952e
commit 474dd1c650
1 changed files with 2 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
drivers/iommu/intel/iommu.c
View File

@ -4472,14 +4472,13 @@ static void __dmar_remove_one_dev_info(struct device_domain_info *info)
iommu = info->iommu;
domain = info->domain;
if (info->dev) {
if (info->dev && !dev_is_real_dma_subdevice(info->dev)) {
if (dev_is_pci(info->dev) && sm_supported(iommu))
intel_pasid_tear_down_entry(iommu, info->dev,
PASID_RID2PASID, false);
iommu_disable_dev_iotlb(info);
if (!dev_is_real_dma_subdevice(info->dev))
domain_context_clear(info);
domain_context_clear(info);
intel_pasid_free_table(info->dev);
}