linux-toradex.git/drivers/iommu/amd/Makefile, branch master

iommu/amd: Add support for nested domain allocation

2026-01-18T09:56:13+00:00

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 
Reviewed-by: Jason Gunthorpe 
Signed-off-by: Suravee Suthikulpanit 
Signed-off-by: Joerg Roedel

iommu/amd: Add support for hw_info for iommu capability query

2026-01-18T09:56:09+00:00

AMD IOMMU Extended Feature (EFR) and Extended Feature 2 (EFR2) registers
specify features supported by each IOMMU hardware instance.
The IOMMU driver checks each feature-specific bits before enabling
each feature at run time.

For IOMMUFD, the hypervisor passes the raw value of amd_iommu_efr and
amd_iommu_efr2 to VMM via iommufd IOMMU_DEVICE_GET_HW_INFO ioctl.

Reviewed-by: Nicolin Chen 
Reviewed-by: Vasant Hegde 
Reviewed-by: Jason Gunthorpe 
Signed-off-by: Suravee Suthikulpanit 
Signed-off-by: Joerg Roedel

iommu/amd: Remove AMD io_pgtable support

2025-11-05T08:08:57+00:00

None of this is used anymore, delete it.

Reviewed-by: Alejandro Jimenez 
Reviewed-by: Vasant Hegde 
Tested-by: Alejandro Jimenez 
Tested-by: Pasha Tatashin 
Signed-off-by: Jason Gunthorpe 
Signed-off-by: Joerg Roedel

iommu: make inclusion of amd directory conditional

2025-05-16T06:46:46+00:00

Nothing in there is active if CONFIG_AMD_IOMMU is not enabled, so the whole
directory can depend on that switch as well.

Fixes: cbe94c6e1a7d ("iommu/amd: Move Kconfig and Makefile bits down into amd directory")
Signed-off-by: Rolf Eike Beer 
Reviewed-by: Lu Baolu 
Link: https://lore.kernel.org/r/1894970.atdPhlSkOF@devpool92.emlix.com
Signed-off-by: Joerg Roedel

iommu/amd: Initial SVA support for AMD IOMMU

2024-04-26T10:16:05+00:00

This includes :
  - Add data structure to track per protection domain dev/pasid binding details
    protection_domain->dev_data_list will track attached list of
    dev_data/PASIDs.

  - Move 'to_pdomain()' to header file

  - Add iommu_sva_set_dev_pasid(). It will check whether PASID is supported
    or not. Also adds PASID to SVA protection domain list as well as to
    device GCR3 table.

  - Add iommu_ops.remove_dev_pasid support. It will unbind PASID from
    device. Also remove pasid data from protection domain device list.

  - Add IOMMU_SVA as dependency to AMD_IOMMU driver

For a given PASID, iommu_set_dev_pasid() will bind all devices to same
SVA protection domain (1 PASID : 1 SVA protection domain : N devices).
This protection domain is different from device protection domain (one
that's mapped in attach_device() path). IOMMU uses domain ID for caching,
invalidation, etc. In SVA mode it will use per-device-domain-ID. Hence in
invalidation path we retrieve domain ID from gcr3_info_table structure and
use that for invalidation.

Co-developed-by: Wei Huang 
Signed-off-by: Wei Huang 
Co-developed-by: Suravee Suthikulpanit 
Signed-off-by: Suravee Suthikulpanit 
Signed-off-by: Vasant Hegde 
Reviewed-by: Jason Gunthorpe 
Link: https://lore.kernel.org/r/20240418103400.6229-14-vasant.hegde@amd.com
Signed-off-by: Joerg Roedel

iommu/amd: Move PPR-related functions into ppr.c

2024-04-26T10:15:57+00:00

In preparation to subsequent PPR-related patches, and also remove static
declaration for certain helper functions so that it can be reused in other
files.

Also rename below functions:
  alloc_ppr_log        -> amd_iommu_alloc_ppr_log
  iommu_enable_ppr_log -> amd_iommu_enable_ppr_log
  free_ppr_log         -> amd_iommu_free_ppr_log
  iommu_poll_ppr_log   -> amd_iommu_poll_ppr_log

Signed-off-by: Suravee Suthikulpanit 
Co-developed-by: Vasant Hegde 
Signed-off-by: Vasant Hegde 
Reviewed-by: Jason Gunthorpe 
Link: https://lore.kernel.org/r/20240418103400.6229-5-vasant.hegde@amd.com
Signed-off-by: Joerg Roedel

iommu/amd: Remove iommu_v2 module

2023-10-06T14:01:52+00:00

AMD GPU driver which was the only in-kernel user of iommu_v2 module
removed dependency on iommu_v2 module.

Also we are working on adding SVA support in AMD IOMMU driver. Device
drivers are expected to use common SVA framework to enable device
PASID/PRI features.

Removing iommu_v2 module and then adding SVA simplifies the development.
Hence remove iommu_v2 module.

Cc: Alex Deucher 
Cc: Joerg Roedel 
Cc: Felix Kuehling 
Signed-off-by: Vasant Hegde 
Reviewed-by: Jason Gunthorpe 
Reviewed-by: Jerry Snitselaar 
Tested-by: Alex Deucher 
Link: https://lore.kernel.org/r/20231006095706.5694-2-vasant.hegde@amd.com
Signed-off-by: Joerg Roedel

iommu/amd: Initial support for AMD IOMMU v2 page table

2022-09-07T14:12:35+00:00

Introduce IO page table framework support for AMD IOMMU v2 page table.
This patch implements 4 level page table within iommu amd driver and
supports 4K/2M/1G page sizes.

Signed-off-by: Vasant Hegde 
Link: https://lore.kernel.org/r/20220825063939.8360-7-vasant.hegde@amd.com
Signed-off-by: Joerg Roedel

iommu/amd: Prepare for generic IO page table framework

2021-01-28T15:51:17+00:00

Add initial hook up code to implement generic IO page table framework.

Signed-off-by: Suravee Suthikulpanit 
Link: https://lore.kernel.org/r/20201215073705.123786-3-suravee.suthikulpanit@amd.com
Signed-off-by: Joerg Roedel

iommu/amd: Move Kconfig and Makefile bits down into amd directory

2020-07-29T12:15:36+00:00

Move AMD Kconfig and Makefile bits down into the amd directory
with the rest of the AMD specific files.

Signed-off-by: Jerry Snitselaar 
Cc: Joerg Roedel 
Cc: Suravee Suthikulpanit 
Link: https://lore.kernel.org/r/20200630200636.48600-3-jsnitsel@redhat.com
Signed-off-by: Joerg Roedel