mbox series

[0/4] iommu/amd: Force SNP-enabled VFIO domain to 4K page size

Message ID 20230110143137.54517-1-suravee.suthikulpanit@amd.com
Headers
Series iommu/amd: Force SNP-enabled VFIO domain to 4K page size |

Message

Suravee Suthikulpanit Jan. 10, 2023, 2:31 p.m. UTC 
  To support VFIO pass-through device with SNP-enabled guest, IOMMU needs to
setup IOMMU page table with matching page size to the RMP. In order for
the IOMMU driver to setup page table appropriately, it needs to determine:

1. If an IOMMU domain is a VFIO domain (PATCH 1)
2. If an IOMMU domain belongs to an SNP-enabled guest (PATCH 2,3)
3. Appropriate page size the IOMMU domain (PATCH 4)

Please note that patch 2/4 is a preparatory patch for an upcoming series
to support SNP, which implements the call-back for the struct
amd_iommu_svm_ops.is_snp_guest().

Best Regards,
Suravee

Suravee Suthikulpanit (4):
  iommu/amd: Introduce Protection-domain flag VFIO
  iommu/amd: Introduce structure amd_iommu_svm_ops.is_snp_guest()
  iommu: Introduce IOMMU call-back for processing struct KVM assigned to
    VFIO
  iommu/amd: Force SNP-enabled VFIO domain to 4K page size

 drivers/iommu/amd/amd_iommu_types.h |  3 ++
 drivers/iommu/amd/iommu.c           | 45 +++++++++++++++++++++++++++--
 drivers/iommu/iommu.c               | 10 +++++++
 drivers/vfio/vfio_main.c            |  1 +
 include/linux/amd-iommu.h           |  6 ++++
 include/linux/iommu.h               |  4 +++
 6 files changed, 67 insertions(+), 2 deletions(-)

Comments

Eric van Tassell Jan. 16, 2023, 1:17 p.m. UTC | #1 
what commit should this series apply onto?


-evt

On 1/10/23 08:31, Suravee Suthikulpanit wrote:
> To support VFIO pass-through device with SNP-enabled guest, IOMMU needs to
> setup IOMMU page table with matching page size to the RMP. In order for
> the IOMMU driver to setup page table appropriately, it needs to determine:
>
> 1. If an IOMMU domain is a VFIO domain (PATCH 1)
> 2. If an IOMMU domain belongs to an SNP-enabled guest (PATCH 2,3)
> 3. Appropriate page size the IOMMU domain (PATCH 4)
>
> Please note that patch 2/4 is a preparatory patch for an upcoming series
> to support SNP, which implements the call-back for the struct
> amd_iommu_svm_ops.is_snp_guest().
>
> Best Regards,
> Suravee
>
> Suravee Suthikulpanit (4):
>    iommu/amd: Introduce Protection-domain flag VFIO
>    iommu/amd: Introduce structure amd_iommu_svm_ops.is_snp_guest()
>    iommu: Introduce IOMMU call-back for processing struct KVM assigned to
>      VFIO
>    iommu/amd: Force SNP-enabled VFIO domain to 4K page size
>
>   drivers/iommu/amd/amd_iommu_types.h |  3 ++
>   drivers/iommu/amd/iommu.c           | 45 +++++++++++++++++++++++++++--
>   drivers/iommu/iommu.c               | 10 +++++++
>   drivers/vfio/vfio_main.c            |  1 +
>   include/linux/amd-iommu.h           |  6 ++++
>   include/linux/iommu.h               |  4 +++
>   6 files changed, 67 insertions(+), 2 deletions(-)
>