From: Alex Williamson <alex.williamson@redhat.com>
To: alex.williamson@redhat.com
Cc: cohuck@redhat.com, kvm@vger.kernel.org,
linux-kernel@vger.kernel.org, jgg@nvidia.com, peterx@redhat.com
Subject: [PATCH v1 00/14] vfio: Device memory DMA mapping improvements
Date: Mon, 08 Mar 2021 14:47:16 -0700 [thread overview]
Message-ID: <161523878883.3480.12103845207889888280.stgit@gimli.home> (raw)
The primary goal of this series is to better manage device memory
mappings, both with a much simplified scheme to zap CPU mappings of
device memory using unmap_mapping_range() and also to restrict IOMMU
mappings of PFNMAPs to vfio device memory and drop those mappings on
device release. This series updates vfio-pci to include the necessary
vma-to-pfn interface, allowing the type1 IOMMU backend to recognize
vfio device memory. If other bus drivers support peer-to-peer DMA,
they should be updated with a similar callback and trigger the device
notifier on release.
RFC->v1:
- Fix some incorrect ERR handling
- Fix use of vm_pgoff to be compatible with unmap_mapping_range()
- Add vma-to-pfn interfaces
- Generic device-from-vma handling
- pfnmap obj directly maps back to vfio_dma obj
- No bypass for strict MMIO handling
- Batch PFNMAP handling
- Follow-on patches to cleanup "extern" usage and bare unsigned
Works in my environment, further testing always appreciated. This
will need to be merged with a solution for concurrent fault handling.
Thanks especially to Jason Gunthorpe for previous reviews and
suggestions. Thanks,
Alex
RFC:https://lore.kernel.org/kvm/161401167013.16443.8389863523766611711.stgit@gimli.home/
---
Alex Williamson (14):
vfio: Create vfio_fs_type with inode per device
vfio: Update vfio_add_group_dev() API
vfio: Export unmap_mapping_range() wrapper
vfio/pci: Use vfio_device_unmap_mapping_range()
vfio: Create a vfio_device from vma lookup
vfio: Add vma to pfn callback
vfio: Add a device notifier interface
vfio/pci: Notify on device release
vfio/type1: Refactor pfn_list clearing
vfio/type1: Pass iommu and dma objects through to vaddr_get_pfn
vfio/type1: Register device notifier
vfio/type1: Support batching of device mappings
vfio: Remove extern from declarations across vfio
vfio: Cleanup use of bare unsigned
Documentation/driver-api/vfio-mediated-device.rst | 19 +-
Documentation/driver-api/vfio.rst | 8 -
drivers/s390/cio/vfio_ccw_cp.h | 13 +
drivers/s390/cio/vfio_ccw_private.h | 14 +
drivers/s390/crypto/vfio_ap_private.h | 2
drivers/vfio/Kconfig | 1
drivers/vfio/fsl-mc/vfio_fsl_mc.c | 6 -
drivers/vfio/fsl-mc/vfio_fsl_mc_private.h | 7 -
drivers/vfio/mdev/vfio_mdev.c | 5
drivers/vfio/pci/vfio_pci.c | 229 ++++-----------------
drivers/vfio/pci/vfio_pci_intrs.c | 42 ++--
drivers/vfio/pci/vfio_pci_private.h | 69 +++---
drivers/vfio/platform/vfio_platform_common.c | 7 -
drivers/vfio/platform/vfio_platform_irq.c | 21 +-
drivers/vfio/platform/vfio_platform_private.h | 31 +--
drivers/vfio/vfio.c | 154 ++++++++++++--
drivers/vfio/vfio_iommu_type1.c | 234 +++++++++++++++------
include/linux/vfio.h | 129 ++++++------
18 files changed, 543 insertions(+), 448 deletions(-)
next reply other threads:[~2021-03-08 21:48 UTC|newest]
Thread overview: 40+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-03-08 21:47 Alex Williamson [this message]
2021-03-08 21:47 ` [PATCH v1 01/14] vfio: Create vfio_fs_type with inode per device Alex Williamson
2021-03-09 8:36 ` Christoph Hellwig
2021-04-09 4:54 ` 答复: " Zengtao (B)
2021-04-09 14:24 ` Alex Williamson
2021-04-09 17:32 ` Jason Gunthorpe
2021-04-12 4:03 ` 答复: " Zengtao (B)
2021-04-12 4:09 ` Zengtao (B)
2021-03-08 21:47 ` [PATCH v1 02/14] vfio: Update vfio_add_group_dev() API Alex Williamson
2021-03-10 7:48 ` Christoph Hellwig
2021-03-10 12:19 ` Jason Gunthorpe
2021-03-10 15:28 ` Alex Williamson
2021-03-11 11:23 ` Christoph Hellwig
2021-03-08 21:47 ` [PATCH v1 03/14] vfio: Export unmap_mapping_range() wrapper Alex Williamson
2021-03-08 21:48 ` [PATCH v1 04/14] vfio/pci: Use vfio_device_unmap_mapping_range() Alex Williamson
2021-03-08 21:48 ` [PATCH v1 05/14] vfio: Create a vfio_device from vma lookup Alex Williamson
2021-03-08 21:48 ` [PATCH v1 06/14] vfio: Add vma to pfn callback Alex Williamson
2021-03-09 0:33 ` Jason Gunthorpe
2021-03-08 21:48 ` [PATCH v1 07/14] vfio: Add a device notifier interface Alex Williamson
2021-03-09 0:46 ` Jason Gunthorpe
2021-03-09 15:45 ` Alex Williamson
2021-03-09 16:47 ` Jason Gunthorpe
2021-03-10 7:56 ` Christoph Hellwig
2021-03-19 22:25 ` Alex Williamson
2021-03-22 15:16 ` Christoph Hellwig
2021-03-08 21:48 ` [PATCH v1 08/14] vfio/pci: Notify on device release Alex Williamson
2021-03-08 21:48 ` [PATCH v1 09/14] vfio/type1: Refactor pfn_list clearing Alex Williamson
2021-03-10 8:01 ` Christoph Hellwig
2021-03-08 21:49 ` [PATCH v1 10/14] vfio/type1: Pass iommu and dma objects through to vaddr_get_pfn Alex Williamson
2021-03-08 21:49 ` [PATCH v1 11/14] vfio/type1: Register device notifier Alex Williamson
2021-03-10 8:03 ` Christoph Hellwig
2021-03-08 21:49 ` [PATCH v1 12/14] vfio/type1: Support batching of device mappings Alex Williamson
2021-03-09 1:04 ` Jason Gunthorpe
2021-03-08 21:49 ` [PATCH v1 13/14] vfio: Remove extern from declarations across vfio Alex Williamson
2021-03-09 0:21 ` Halil Pasic
2021-03-09 1:07 ` Jason Gunthorpe
2021-03-08 21:49 ` [PATCH v1 14/14] vfio: Cleanup use of bare unsigned Alex Williamson
2021-03-09 1:07 ` Jason Gunthorpe
2021-03-09 8:31 ` Christoph Hellwig
2021-03-09 1:06 ` [PATCH v1 00/14] vfio: Device memory DMA mapping improvements Jason Gunthorpe
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