Commit 0e8000f8 authored by Lu Baolu's avatar Lu Baolu Committed by Joerg Roedel
Browse files

iommu/vt-d: Return ID associated with an auxiliary domain 



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>
Signed-off-by: default avatarSanjay Kumar <sanjay.k.kumar@intel.com>
Signed-off-by: default avatarLiu Yi L <yi.l.liu@intel.com>
Signed-off-by: default avatarLu Baolu <baolu.lu@linux.intel.com>
Signed-off-by: default avatarJoerg Roedel <jroedel@suse.de>
parent 67b8e02b

drivers/iommu/intel-iommu.c

+10 −0
Original line number Diff line number Diff line
@@ -5697,6 +5697,15 @@ intel_iommu_dev_feat_enabled(struct device *dev, enum iommu_dev_features feat) 
	return false;

}



static int

intel_iommu_aux_get_pasid(struct iommu_domain *domain, struct device *dev)

{

	struct dmar_domain *dmar_domain = to_dmar_domain(domain);



	return dmar_domain->default_pasid > 0 ?

			dmar_domain->default_pasid : -EINVAL;

}



const struct iommu_ops intel_iommu_ops = {

	.capable		= intel_iommu_capable,

	.domain_alloc		= intel_iommu_domain_alloc,
@@ -5705,6 +5714,7 @@ const struct iommu_ops intel_iommu_ops = { 
	.detach_dev		= intel_iommu_detach_device,

	.aux_attach_dev		= intel_iommu_aux_attach_device,

	.aux_detach_dev		= intel_iommu_aux_detach_device,

	.aux_get_pasid		= intel_iommu_aux_get_pasid,

	.map			= intel_iommu_map,

	.unmap			= intel_iommu_unmap,

	.iova_to_phys		= intel_iommu_iova_to_phys,