Files
Lu Baolu 39c20c4e83 iommu/vt-d: Only handle IOPF for SVA when PRI is supported
In intel_svm_set_dev_pasid(), the driver unconditionally manages the IOPF
handling during a domain transition. However, commit a86fb77173
("iommu/vt-d: Allow SVA with device-specific IOPF") introduced support for
SVA on devices that handle page faults internally without utilizing the
PCI PRI. On such devices, the IOMMU-side IOPF infrastructure is not
required. Calling iopf_for_domain_replace() on these devices is incorrect
and can lead to unexpected failures during PASID attachment or unwinding.

Add a check for info->pri_supported to ensure that the IOPF queue logic
is only invoked for devices that actually rely on the IOMMU's PRI-based
fault handling.

Fixes: 17fce9d233 ("iommu/vt-d: Put iopf enablement in domain attach path")
Cc: stable@vger.kernel.org
Suggested-by: Kevin Tian <kevin.tian@intel.com>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com>
Link: https://lore.kernel.org/r/20260310075520.295104-1-baolu.lu@linux.intel.com
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
2026-03-17 13:20:06 +01:00
..