iommu/amd: Add support for nested domain allocation

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The nested domain is allocated with IOMMU_DOMAIN_NESTED type to store
stage-1 translation (i.e. GVA->GPA). This includes the GCR3 root pointer
table along with guest page tables. The struct iommu_hwpt_amd_guest
contains this information, and is passed from user-space as a parameter
of the struct iommu_ops.domain_alloc_nested().

Reviewed-by: Nicolin Chen <nicolinc@nvidia.com>
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>
Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>

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Suravee Suthikulpanit 2026-01-15 06:08:10 +00:00 • committed by Joerg Roedel

parent e113a72576

commit 774180a74a

4 changed files with 129 additions and 1 deletions

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2

drivers/iommu/amd/Makefile

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4

drivers/iommu/amd/amd_iommu.h

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14

drivers/iommu/amd/amd_iommu_types.h

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110

drivers/iommu/amd/nested.c

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