Commit 4f0bdab1 authored by Yi Liu's avatar Yi Liu Committed by Joerg Roedel
Browse files

iommu/vt-d: Make the blocked domain support PASID 



The blocked domain can be extended to park PASID of a device to be the
DMA blocking state. By this the remove_dev_pasid() op is dropped.

Reviewed-by: default avatarKevin Tian <kevin.tian@intel.com>
Reviewed-by: default avatarJason Gunthorpe <jgg@nvidia.com>
Reviewed-by: default avatarLu Baolu <baolu.lu@linux.intel.com>
Signed-off-by: default avatarYi Liu <yi.l.liu@intel.com>
Link: https://lore.kernel.org/r/20241204122928.11987-6-yi.l.liu@intel.com


Signed-off-by: default avatarJoerg Roedel <jroedel@suse.de>
parent ef181762

drivers/iommu/intel/iommu.c

+11 −4
Original line number Diff line number Diff line
@@ -3250,10 +3250,15 @@ static int blocking_domain_attach_dev(struct iommu_domain *domain, 
	return 0;

}



static int blocking_domain_set_dev_pasid(struct iommu_domain *domain,

					 struct device *dev, ioasid_t pasid,

					 struct iommu_domain *old);



static struct iommu_domain blocking_domain = {

	.type = IOMMU_DOMAIN_BLOCKED,

	.ops = &(const struct iommu_domain_ops) {

		.attach_dev	= blocking_domain_attach_dev,

		.set_dev_pasid	= blocking_domain_set_dev_pasid,

	}

};
@@ -4099,13 +4104,16 @@ void domain_remove_dev_pasid(struct iommu_domain *domain, 
	kfree(dev_pasid);

}



static void intel_iommu_remove_dev_pasid(struct device *dev, ioasid_t pasid,

					 struct iommu_domain *domain)

static int blocking_domain_set_dev_pasid(struct iommu_domain *domain,

					 struct device *dev, ioasid_t pasid,

					 struct iommu_domain *old)

{

	struct device_domain_info *info = dev_iommu_priv_get(dev);



	intel_pasid_tear_down_entry(info->iommu, dev, pasid, false);

	domain_remove_dev_pasid(domain, dev, pasid);

	domain_remove_dev_pasid(old, dev, pasid);



	return 0;

}



struct dev_pasid_info *
@@ -4478,7 +4486,6 @@ const struct iommu_ops intel_iommu_ops = { 
	.dev_disable_feat	= intel_iommu_dev_disable_feat,

	.is_attach_deferred	= intel_iommu_is_attach_deferred,

	.def_domain_type	= device_def_domain_type,

	.remove_dev_pasid	= intel_iommu_remove_dev_pasid,

	.pgsize_bitmap		= SZ_4K,

	.page_response		= intel_iommu_page_response,

	.default_domain_ops = &(const struct iommu_domain_ops) {