[GIT PULL] VFIO updates for v6.7-rc1

[Alex Williamson]

Hi Linus,

The following changes since commit b6cd17050bc0817c79924f23716198b2e935556e:

  Merge tag 'vfio-v6.6-rc4' of https://github.com/awilliam/linux-vfio (2023-09-27 09:33:55 -0700)

are available in the Git repository at:

  https://github.com/awilliam/linux-vfio.git tags/vfio-v6.7-rc1

for you to fetch changes up to 2b88119e35b00d8cb418d86abbace3b90a993bd7:

  vfio/mtty: Enable migration support (2023-10-24 15:03:10 -0600)

----------------------------------------------------------------
VFIO updates for v6.7

 - Add support for "chunk mode" in the mlx5-vfio-pci variant driver,
   which allows both larger device image sizes for migration, beyond
   the previous 4GB limit, and also read-ahead support for improved
   migration performance. (Yishai Hadas)

 - A new bus master control interface for the CDX bus driver where
   there is no in-band mechanism to toggle device DMA as there is
   through config space on PCI devices. (Nipun Gupta)

 - Add explicit alignment directives to vfio data structures to
   reduce the chance of breaking 32-bit userspace.  In most cases
   this is transparent and the remaining cases where data structures
   are padded work within the existing rules for extending data
   structures within vfio.  (Stefan Hajnoczi)

 - Resolve a bug in the cdx bus driver noted when compiled with clang
   where missing parenthesis result in the wrong operation.
   (Nathan Chancellor)

 - Resolve errors reported by smatch for a function when dealing
   with invalid inputs. (Alex Williamson)

 - Add migration support to the mtty vfio/mdev sample driver for
   testing and integration purposes, allowing CI of migration without
   specific hardware requirements.  Also resolve many of the short-
   comings of this driver relative to implementation of the vfio
   interrupt ioctl along the way. (Alex Williamson)

----------------------------------------------------------------
Alex Williamson (4):
      Merge branch 'mlx5-vfio' of https://git.kernel.org/pub/scm/linux/kernel/git/mellanox/linux into v6.7/vfio/next
      vfio: Fix smatch errors in vfio_combine_iova_ranges()
      vfio/mtty: Overhaul mtty interrupt handling
      vfio/mtty: Enable migration support

Nathan Chancellor (1):
      vfio/cdx: Add parentheses between bitwise AND expression and logical NOT

Nipun Gupta (3):
      cdx: add support for bus mastering
      vfio: add bus master feature to device feature ioctl
      vfio-cdx: add bus mastering device feature support

Stefan Hajnoczi (3):
      vfio: trivially use __aligned_u64 for ioctl structs
      vfio: use __aligned_u64 in struct vfio_device_gfx_plane_info
      vfio: use __aligned_u64 in struct vfio_device_ioeventfd

Yishai Hadas (9):
      net/mlx5: Introduce ifc bits for migration in a chunk mode
      vfio/mlx5: Wake up the reader post of disabling the SAVING migration file
      vfio/mlx5: Refactor the SAVE callback to activate a work only upon an error
      vfio/mlx5: Enable querying state size which is > 4GB
      vfio/mlx5: Rename some stuff to match chunk mode
      vfio/mlx5: Pre-allocate chunks for the STOP_COPY phase
      vfio/mlx5: Add support for SAVING in chunk mode
      vfio/mlx5: Add support for READING in chunk mode
      vfio/mlx5: Activate the chunk mode functionality

 drivers/cdx/cdx.c                       |  32 ++
 drivers/cdx/controller/cdx_controller.c |   4 +
 drivers/cdx/controller/mcdi_functions.c |  58 +++
 drivers/cdx/controller/mcdi_functions.h |  13 +
 drivers/gpu/drm/i915/gvt/kvmgt.c        |   2 +-
 drivers/vfio/cdx/main.c                 |  57 ++-
 drivers/vfio/cdx/private.h              |   2 +
 drivers/vfio/pci/mlx5/cmd.c             | 103 ++--
 drivers/vfio/pci/mlx5/cmd.h             |  28 +-
 drivers/vfio/pci/mlx5/main.c            | 283 ++++++++---
 drivers/vfio/vfio_main.c                |  10 +
 include/linux/cdx/cdx_bus.h             |  18 +
 include/linux/mlx5/mlx5_ifc.h           |  15 +-
 include/uapi/linux/vfio.h               |  47 +-
 samples/vfio-mdev/mbochs.c              |   2 +-
 samples/vfio-mdev/mdpy.c                |   2 +-
 samples/vfio-mdev/mtty.c                | 829 +++++++++++++++++++++++++++++---
 17 files changed, 1309 insertions(+), 196 deletions(-)