RE: [PATCH v7 8/9] iommu/vt-d: Convert pasid based cache invalidation to return QI fault

From: Liu, Yi L yi.l.liu@intel.com Sent: Thursday, December 21, 2023 11:40 PM

From: Lu Baolu baolu.lu@linux.intel.com

This makes the pasid based cache invalidation to return QI faults to callers.

it's not just for pasid cache invalidation, e.g. there is also change on qi_flush_dev_iotlb().

This is needed when usersapce wants to invalidate cache after modifying the stage-1 page table used in nested translation.

Signed-off-by: Lu Baolu baolu.lu@linux.intel.com Signed-off-by: Yi Liu yi.l.liu@intel.com

Reviewed-by: Kevin Tian kevin.tian@intel.com