@@ -5553,6 +5553,27 @@ static int intel_iommu_set_dev_attr(struct device *dev,
return ret;
}
+static int intel_iommu_domain_get_attr(struct iommu_domain *domain,
+ enum iommu_attr attr, void *data)
+{
+ struct dmar_domain *dmar_domain = to_dmar_domain(domain);
+ int ret = -EINVAL, *id;
+
+ switch (attr) {
+ case DOMAIN_ATTR_AUXD_ID:
+ if (dmar_domain->default_pasid > 0) {
+ ret = 0;
+ id = data;
+ *id = dmar_domain->default_pasid;
+ }
+ break;
+ default:
+ break;
+ }
+
+ return ret;
+}
+
const struct iommu_ops intel_iommu_ops = {
.capable = intel_iommu_capable,
.domain_alloc = intel_iommu_domain_alloc,
@@ -5567,6 +5588,7 @@ const struct iommu_ops intel_iommu_ops = {
.get_resv_regions = intel_iommu_get_resv_regions,
.put_resv_regions = intel_iommu_put_resv_regions,
.device_group = pci_device_group,
+ .domain_get_attr = intel_iommu_domain_get_attr,
.get_dev_attr = intel_iommu_get_dev_attr,
.set_dev_attr = intel_iommu_set_dev_attr,
.pgsize_bitmap = INTEL_IOMMU_PGSIZES,
This adds support to return the default pasid associated with an auxiliary domain. The PCI device which is bound with this domain should use this value as the pasid for all DMA requests of the subset of device which is isolated and protected with this domain. Cc: Ashok Raj <ashok.raj@intel.com> Cc: Jacob Pan <jacob.jun.pan@linux.intel.com> Cc: Kevin Tian <kevin.tian@intel.com> Cc: Liu Yi L <yi.l.liu@intel.com> Signed-off-by: Lu Baolu <baolu.lu@linux.intel.com> --- drivers/iommu/intel-iommu.c | 22 ++++++++++++++++++++++ 1 file changed, 22 insertions(+)