On 2023/3/2 8:59, Jacob Pan wrote:
For in-kernel DMA, use non-privileged access for all PASIDs to be
consistent with RID_PASID.
There's no need to differentiate user and kernel for in-kernel DMA. >
Signed-off-by: Jacob Pan <jacob.jun.pan@xxxxxxxxxxxxxxx>
---
drivers/iommu/intel/iommu.c | 2 --
1 file changed, 2 deletions(-)
diff --git a/drivers/iommu/intel/iommu.c b/drivers/iommu/intel/iommu.c
index a0cb3bc851ac..9e3c056e392d 100644
--- a/drivers/iommu/intel/iommu.c
+++ b/drivers/iommu/intel/iommu.c
@@ -2334,8 +2334,6 @@ static int domain_setup_first_level(struct intel_iommu *iommu,
if (level != 4 && level != 5)
return -EINVAL;
- if (pasid != PASID_RID2PASID)
- flags |= PASID_FLAG_SUPERVISOR_MODE;
With above removed, PASID_FLAG_SUPERVISOR_MODE is not used anywhere?
Perhaps you can cleanup it to avoid dead code?
if (level == 5)
flags |= PASID_FLAG_FL5LP;
Best regards,
baolu
