Commit 37f900e7 authored by Lu Baolu's avatar Lu Baolu Committed by Joerg Roedel
Browse files

iommu/vt-d: Prepare for set_dev_pasid callback 



The domain_flush_pasid_iotlb() helper function is used to flush the IOTLB
entries for a given PASID. Previously, this function assumed that
RID2PASID was only used for the first-level DMA translation. However, with
the introduction of the set_dev_pasid callback, this assumption is no
longer valid.

Add a check before using the RID2PASID for PASID invalidation. This check
ensures that the domain has been attached to a physical device before
using RID2PASID.

Signed-off-by: default avatarLu Baolu <baolu.lu@linux.intel.com>
Signed-off-by: default avatarJacob Pan <jacob.jun.pan@linux.intel.com>
Reviewed-by: default avatarKevin Tian <kevin.tian@intel.com>
Link: https://lore.kernel.org/r/20230802212427.1497170-7-jacob.jun.pan@linux.intel.com


Signed-off-by: default avatarJoerg Roedel <jroedel@suse.de>
parent 15478623

drivers/iommu/intel/iommu.c

+2 −1
Original line number Diff line number Diff line
@@ -1475,6 +1475,7 @@ static void domain_flush_pasid_iotlb(struct intel_iommu *iommu, 
	unsigned long flags;



	spin_lock_irqsave(&domain->lock, flags);

	if (!list_empty(&domain->devices))

		qi_flush_piotlb(iommu, did, IOMMU_NO_PASID, addr, npages, ih);

	spin_unlock_irqrestore(&domain->lock, flags);

}