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 create and manage mediated devices, VFIO based driver
for mediated PCI devices that are created by Mdev core module and update
VFIO type1 IOMMU module to support mediated devices.
What's new in v6?
- Removed per mdev_device lock for registration callbacks. Vendor driver should
implement locking if they need to serialize registration callbacks.
- Added mapped region tracking logic and invalidation function to be used by
vendor driver.
- Moved vfio_pin_pages and vfio_unpin_pages API from IOMMU type1 driver to vfio
driver. Added callbacks to vfio ops structure to support pin and unpin APIs in
backend iommu module.
- Used uuid_le_to_bin() to parse UUID string and convert to bin. This requires
following commits from linux master branch:
* commit bc9dc9d5eec908806f1b15c9ec2253d44dcf7835 :
lib/uuid.c: use correct offset in uuid parser
* commit 2b1b0d66704a8cafe83be7114ec4c15ab3a314ad :
lib/uuid.c: introduce a few more generic helpers
- Requires below commits from linux master branch for mmap region fault handler
that uses remap_pfn_range() to setup EPT properly.
* commit add6a0cd1c5ba51b201e1361b05a5df817083618
KVM: MMU: try to fix up page faults before giving up
* commit 92176a8ede577d0ff78ab3298e06701f67ad5f51 :
KVM: MMU: prepare to support mapping of VM_IO and VM_PFNMAP frames
Tested:
- Single vGPU VM
- Multiple vGPU VMs on same GPU
Thanks,
Kirti
Kirti Wankhede (4):
vfio: Mediated device Core driver
vfio: VFIO driver for mediated PCI device
vfio iommu: Add support for mediated devices
docs: Add Documentation for Mediated devices
Documentation/vfio-mediated-device.txt | 235 ++++++++++++
drivers/vfio/Kconfig | 1 +
drivers/vfio/Makefile | 1 +
drivers/vfio/mdev/Kconfig | 18 +
drivers/vfio/mdev/Makefile | 6 +
drivers/vfio/mdev/mdev_core.c | 676 +++++++++++++++++++++++++++++++++
drivers/vfio/mdev/mdev_driver.c | 142 +++++++
drivers/vfio/mdev/mdev_private.h | 33 ++
drivers/vfio/mdev/mdev_sysfs.c | 269 +++++++++++++
drivers/vfio/mdev/vfio_mpci.c | 536 ++++++++++++++++++++++++++
drivers/vfio/pci/vfio_pci_private.h | 6 -
drivers/vfio/pci/vfio_pci_rdwr.c | 1 +
drivers/vfio/vfio.c | 82 ++++
drivers/vfio/vfio_iommu_type1.c | 499 +++++++++++++++++++++---
include/linux/mdev.h | 236 ++++++++++++
include/linux/vfio.h | 20 +-
16 files changed, 2707 insertions(+), 54 deletions(-)
create mode 100644 Documentation/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_mpci.c
create mode 100644 include/linux/mdev.h
--
2.7.0
