From: Vasant Hegde via iommu <iommu@lists.linux-foundation.org>
To: <iommu@lists.linux-foundation.org>
Cc: Vasant Hegde <vasant.hegde@amd.com>
Subject: [PATCH v1 0/7] iommu/amd: Add Generic IO Page Table Framework Support for v2 Page Table
Date: Fri, 3 Jun 2022 16:51:00 +0530 [thread overview]
Message-ID: <20220603112107.8603-1-vasant.hegde@amd.com> (raw)
This series introduces a new usage model for the v2 page table, where it
can be used to implement support for DMA-API by adopting the generic
IO page table framework.
One of the target usecases is to support nested IO page tables
where the guest uses the guest IO page table (v2) for translating
GVA to GPA, and the hypervisor uses the host I/O page table (v1) for
translating GPA to SPA. This is a pre-requisite for supporting the new
HW-assisted vIOMMU presented at the KVM Forum 2020.
https://static.sched.com/hosted_files/kvmforum2020/26/vIOMMU%20KVM%20Forum%202020.pdf
The following components are introduced in this series:
- Part 1 (patch 1-4 and 6)
Refactor the current IOMMU page table code to adopt the generic IO page
table framework, and add AMD IOMMU Guest (v2) page table management code.
- Part 2 (patch 5)
Add support for the AMD IOMMU Guest IO Protection feature (GIOV)
where requests from the I/O device without a PASID are treated as
if they have PASID of 0.
- Part 3 (patch 7)
Introduce new "amd_iommu_pgtable" command-line to allow users
to select the mode of operation (v1 or v2).
See AMD I/O Virtualization Technology Specification for more detail.
http://www.amd.com/system/files/TechDocs/48882_IOMMU_3.05_PUB.pdf
Note:
This patchset is based on top of "iommu/amd: Add multiple PCI segments support" patchset [1].
[1] https://lore.kernel.org/linux-iommu/20220511072141.15485-1-vasant.hegde@amd.com/T/#t
Thanks,
Vasant
Changes from RFC -> v1:
- Addressed review comments from Joerg
- Reimplemented v2 page table
RFC patchset : https://lore.kernel.org/linux-iommu/20210312090411.6030-1-suravee.suthikulpanit@amd.com/T/#t
Suravee Suthikulpanit (5):
iommu/amd: Refactor amd_iommu_domain_enable_v2
iommu/amd: Update sanity check when enable PRI/ATS
iommu/amd: Add support for Guest IO protection
iommu/amd: Add support for using AMD IOMMU v2 page table for DMA-API
iommu/amd: Introduce amd_iommu_pgtable command-line option
Vasant Hegde (2):
iommu/amd: Fix sparse warning
iommu/amd: Initial support for AMD IOMMU v2 page table
.../admin-guide/kernel-parameters.txt | 6 +
drivers/iommu/amd/Makefile | 2 +-
drivers/iommu/amd/amd_iommu_types.h | 8 +-
drivers/iommu/amd/init.c | 27 +-
drivers/iommu/amd/io_pgtable_v2.c | 407 ++++++++++++++++++
drivers/iommu/amd/iommu.c | 90 ++--
drivers/iommu/io-pgtable.c | 1 +
include/linux/io-pgtable.h | 2 +
8 files changed, 516 insertions(+), 27 deletions(-)
create mode 100644 drivers/iommu/amd/io_pgtable_v2.c
--
2.27.0
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next reply other threads:[~2022-06-03 11:21 UTC|newest]
Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-06-03 11:21 Vasant Hegde via iommu [this message]
2022-06-03 11:21 ` [PATCH v1 1/7] iommu/amd: Refactor amd_iommu_domain_enable_v2 Vasant Hegde via iommu
2022-06-03 11:21 ` [PATCH v1 2/7] iommu/amd: Update sanity check when enable PRI/ATS Vasant Hegde via iommu
2022-06-03 11:21 ` [PATCH v1 3/7] iommu/amd: Fix sparse warning Vasant Hegde via iommu
2022-06-23 8:03 ` Joerg Roedel
2022-06-23 9:42 ` Robin Murphy
2022-06-23 11:30 ` Joerg Roedel
2022-06-27 10:29 ` Vasant Hegde via iommu
2022-07-13 4:07 ` Vasant Hegde
2022-07-15 11:32 ` Robin Murphy
2022-06-03 11:21 ` [PATCH v1 4/7] iommu/amd: Initial support for AMD IOMMU v2 page table Vasant Hegde via iommu
2022-06-23 8:09 ` Joerg Roedel
2022-06-03 11:21 ` [PATCH v1 5/7] iommu/amd: Add support for Guest IO protection Vasant Hegde via iommu
2022-06-03 11:21 ` [PATCH v1 6/7] iommu/amd: Add support for using AMD IOMMU v2 page table for DMA-API Vasant Hegde via iommu
2022-06-03 11:21 ` [PATCH v1 7/7] iommu/amd: Introduce amd_iommu_pgtable command-line option Vasant Hegde via iommu
2022-06-23 8:12 ` Joerg Roedel
2022-06-28 7:53 ` Vasant Hegde via iommu
2022-07-06 9:11 ` Joerg Roedel
2022-06-23 8:15 ` [PATCH v1 0/7] iommu/amd: Add Generic IO Page Table Framework Support for v2 Page Table Joerg Roedel
2022-06-28 9:05 ` Vasant Hegde via iommu
2022-07-06 9:14 ` Joerg Roedel
2022-07-13 3:07 ` Suthikulpanit, Suravee
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