]> git.ipfire.org Git - thirdparty/linux.git/commit
iommu/vt-d: Only handle IOPF for SVA when PRI is supported
authorLu Baolu <baolu.lu@linux.intel.com>
Mon, 16 Mar 2026 07:16:40 +0000 (15:16 +0800)
committerJoerg Roedel <joerg.roedel@amd.com>
Tue, 17 Mar 2026 12:20:06 +0000 (13:20 +0100)
commit39c20c4e83b9f78988541d829aa34668904e54a0
treee51e2558fd448c7a0005d5084ad3927c458f9180
parentfe89277c9ceb0d6af0aa665bcf24a41d8b1b79cd
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 a86fb7717320
("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: 17fce9d2336d ("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>
drivers/iommu/intel/svm.c