Commit 5f536388 authored by Yi Liu's avatar Yi Liu Committed by Joerg Roedel
Browse files

iommu/amd: 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.

Remove PASID from old domain and device GCR3 table. No need to attach
PASID to the blocked domain as clearing PASID from GCR3 table will make
sure all DMAs for that PASID are blocked.

Suggested-by: default avatarJason Gunthorpe <jgg@nvidia.com>
Reviewed-by: default avatarVasant Hegde <vasant.hegde@amd.com>
Reviewed-by: default avatarJason Gunthorpe <jgg@nvidia.com>
Reviewed-by: default avatarKevin Tian <kevin.tian@intel.com>
Signed-off-by: default avatarYi Liu <yi.l.liu@intel.com>
Link: https://lore.kernel.org/r/20241204122928.11987-7-yi.l.liu@intel.com


Signed-off-by: default avatarJoerg Roedel <jroedel@suse.de>
parent 4f0bdab1

drivers/iommu/amd/iommu.c

+9 −1
Original line number Diff line number Diff line
@@ -2475,10 +2475,19 @@ static int blocked_domain_attach_device(struct iommu_domain *domain, 
	return 0;

}



static int blocked_domain_set_dev_pasid(struct iommu_domain *domain,

					struct device *dev, ioasid_t pasid,

					struct iommu_domain *old)

{

	amd_iommu_remove_dev_pasid(dev, pasid, old);

	return 0;

}



static struct iommu_domain blocked_domain = {

	.type = IOMMU_DOMAIN_BLOCKED,

	.ops = &(const struct iommu_domain_ops) {

		.attach_dev     = blocked_domain_attach_device,

		.set_dev_pasid  = blocked_domain_set_dev_pasid,

	}

};
@@ -2901,7 +2910,6 @@ const struct iommu_ops amd_iommu_ops = { 
	.def_domain_type = amd_iommu_def_domain_type,

	.dev_enable_feat = amd_iommu_dev_enable_feature,

	.dev_disable_feat = amd_iommu_dev_disable_feature,

	.remove_dev_pasid = amd_iommu_remove_dev_pasid,

	.page_response = amd_iommu_page_response,

	.default_domain_ops = &(const struct iommu_domain_ops) {

		.attach_dev	= amd_iommu_attach_device,