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iommu/amd: Make the blocked domain support PASID

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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: Jason Gunthorpe <jgg@nvidia.com>
Reviewed-by: Vasant Hegde <vasant.hegde@amd.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Signed-off-by: Yi Liu <yi.l.liu@intel.com>
Link: https://lore.kernel.org/r/20241204122928.11987-7-yi.l.liu@intel.com
Signed-off-by: Joerg Roedel <jroedel@suse.de>
This commit is contained in:
Yi Liu 2024-12-04 04:29:27 -08:00 committed by Joerg Roedel
parent 4f0bdab175
commit 5f53638882
1 changed files with 9 additions and 1 deletions
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10
drivers/iommu/amd/iommu.c
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@ -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,