[PATCH v9 00/12] Add Mediated device support

From: Kirti Wankhede
Date: Mon Oct 17 2016 - 17:21:11 EST

This series adds Mediated device support to Linux host kernel. Purpose
of this series is to provide a common interface for mediated device
management that can be used by different devices. This series introduces
Mdev core module that creates and manages mediated devices, VFIO based
driver for mediated devices that are created by mdev core module and
update VFIO type1 IOMMU module to support pinning & unpinning for mediated

What changed in v9?
- added class named 'mdev_bus' that contains links to devices that are
registered with the mdev core driver.
- The [<type-id>] name is created by adding the the device driver string as a
prefix to the string provided by the vendor driver.
- 'device_api' attribute should be provided by vendor driver and should show
which device API is being created, for example, "vfio-pci" for a PCI device.
- Renamed link to its type in mdev device directory to 'mdev_type'

- Split commits in multple individual commits
- Added function to get device_api string based on vfio_device_info.flags.

- Handled the case if all devices attached to the normal IOMMU API domain
go away and mdev device still exist in domain. Updated page accounting
for local domain.
- Similarly if device is attached to normal IOMMU API domain, mappings are
establised and page accounting is updated accordingly.
- Tested hot-plug and hot-unplug of vGPU and GPU pass through device with
Linux VM.

- Updated Documentation and sample driver, mtty.c, accordingly.

Kirti Wankhede (12):
vfio: Mediated device Core driver
vfio: VFIO based driver for Mediated devices
vfio: Rearrange functions to get vfio_group from dev
vfio iommu: Add support for mediated devices
vfio: Introduce common function to add capabilities
vfio_pci: Update vfio_pci to use vfio_info_add_capability()
vfio: Introduce vfio_set_irqs_validate_and_prepare()
vfio_pci: Updated to use vfio_set_irqs_validate_and_prepare()
vfio_platform: Updated to use vfio_set_irqs_validate_and_prepare()
vfio: Add function to get device_api string from
docs: Add Documentation for Mediated devices
docs: Sample driver to demonstrate how to use Mediated device

Documentation/vfio-mdev/Makefile | 13 +
Documentation/vfio-mdev/mtty.c | 1429 ++++++++++++++++++++++
Documentation/vfio-mdev/vfio-mediated-device.txt | 389 ++++++
drivers/vfio/Kconfig | 1 +
drivers/vfio/Makefile | 1 +
drivers/vfio/mdev/Kconfig | 18 +
drivers/vfio/mdev/Makefile | 5 +
drivers/vfio/mdev/mdev_core.c | 372 ++++++
drivers/vfio/mdev/mdev_driver.c | 128 ++
drivers/vfio/mdev/mdev_private.h | 41 +
drivers/vfio/mdev/mdev_sysfs.c | 296 +++++
drivers/vfio/mdev/vfio_mdev.c | 148 +++
drivers/vfio/pci/vfio_pci.c | 101 +-
drivers/vfio/platform/vfio_platform_common.c | 31 +-
drivers/vfio/vfio.c | 287 ++++-
drivers/vfio/vfio_iommu_type1.c | 692 +++++++++--
include/linux/mdev.h | 177 +++
include/linux/vfio.h | 23 +-
18 files changed, 3948 insertions(+), 204 deletions(-)
create mode 100644 Documentation/vfio-mdev/Makefile
create mode 100644 Documentation/vfio-mdev/mtty.c
create mode 100644 Documentation/vfio-mdev/vfio-mediated-device.txt
create mode 100644 drivers/vfio/mdev/Kconfig
create mode 100644 drivers/vfio/mdev/Makefile
create mode 100644 drivers/vfio/mdev/mdev_core.c
create mode 100644 drivers/vfio/mdev/mdev_driver.c
create mode 100644 drivers/vfio/mdev/mdev_private.h
create mode 100644 drivers/vfio/mdev/mdev_sysfs.c
create mode 100644 drivers/vfio/mdev/vfio_mdev.c
create mode 100644 include/linux/mdev.h