korg/linux
0
0
Fork 0
mirror of https://mirrors.bfsu.edu.cn/git/linux.git synced 2025-01-16 19:04:41 +08:00
Code Issues Packages Projects Releases Wiki Activity

iommu/vt-d: Disable SVM when ATS/PRI/PASID are not enabled in the device

Browse Source 
Currently, the Intel VT-d supports Shared Virtual Memory (SVM) only when
IO page fault is supported. Otherwise, shared memory pages can not be
swapped out and need to be pinned. The device needs the Address Translation
Service (ATS), Page Request Interface (PRI) and Process Address Space
Identifier (PASID) capabilities to be enabled to support IO page fault.

Disable SVM when ATS, PRI and PASID are not enabled in the device.

Signed-off-by: Kyung Min Park <kyung.min.park@intel.com>
Acked-by: Lu Baolu <baolu.lu@linux.intel.com>
Link: https://lore.kernel.org/r/20210314201534.918-1-kyung.min.park@intel.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Kyung Min Park 2021-03-14 13:15:34 -07:00 committed by Joerg Roedel
parent 1e28eed176
commit dec991e472
1 changed files with 3 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
drivers/iommu/intel/iommu.c
View File

@ -5380,6 +5380,9 @@ intel_iommu_dev_enable_feat(struct device *dev, enum iommu_dev_features feat)
if (!info)
return -EINVAL;
if (!info->pasid_enabled || !info->pri_enabled || !info->ats_enabled)
return -EINVAL;
if (info->iommu->flags & VTD_FLAG_SVM_CAPABLE)
return 0;
}