Messages in this thread | | | From | Suravee Suthikulpanit <> | Subject | [PATCH 0/4] iommu/amd: Force SNP-enabled VFIO domain to 4K page size | Date | Tue, 10 Jan 2023 08:31:33 -0600 |
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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(-)
-- 2.32.0
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