Messages in this thread | | | From | Jacob Pan <> | Subject | [PATCH v2 0/4] User API for nested shared virtual address (SVA) | Date | Sat, 21 Sep 2019 17:07:46 -0700 |
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This set consists of IOMMU APIs to support SVA in the guest, a.k.a nested SVA. As the complete SVA support is complex, we break down the enabling effort into three stages: 1. PCI device direct assignment 2. Fault handling, especially page request service support 3. Mediated device assignment
Each stage includes common API and vendor specific IOMMU driver changes. This series is the common uAPI for stage #1. It is intended to build consensus on the interface which all vendors reply on.
This series is extracted from the complete stage1 set which includes VT-d code. https://lkml.org/lkml/2019/8/15/951
Changes: - Use spinlock instead of mutex to protect ioasid custom allocators. This is to support callers in atomic context - Added more padding to guest PASID bind data for future extensions, suggested by Joerg. After much thinking, I did not do name change from PASID to IOASID in the uAPI, considering we have been using PASID in the rest of uAPIs. IOASID will remain used within the kernel.
For more discussions lead to this series, checkout LPC 2019 VFIO/IOMMU/PCI microconference materials. https://linuxplumbersconf.org/event/4/sessions/66/#20190909
Change log: v2: - Addressed review comments by Jean on IOASID custom allocators, locking fix, misc control flow fix. - Fixed a compile error with missing header errno.h - Updated Jean-Philiippe's new email and updateded reviewed-by tag
Jacob Pan (2): iommu/ioasid: Add custom allocators iommu: Introduce guest PASID bind function
Jean-Philippe Brucker (1): iommu: Add I/O ASID allocator
Yi L Liu (1): iommu: Introduce cache_invalidate API
drivers/iommu/Kconfig | 4 + drivers/iommu/Makefile | 1 + drivers/iommu/ioasid.c | 422 +++++++++++++++++++++++++++++++++++++++++++++ drivers/iommu/iommu.c | 30 ++++ include/linux/ioasid.h | 76 ++++++++ include/linux/iommu.h | 36 ++++ include/uapi/linux/iommu.h | 169 ++++++++++++++++++ 7 files changed, 738 insertions(+) create mode 100644 drivers/iommu/ioasid.c create mode 100644 include/linux/ioasid.h
-- 2.7.4
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