linux-toradex.git/drivers/vfio/platform, branch v6.7

vfio-iommufd: Add detach_ioas support for physical VFIO devices

2023-07-25T16:19:12+00:00

This prepares for adding DETACH ioctl for physical VFIO devices.

Reviewed-by: Kevin Tian 
Reviewed-by: Jason Gunthorpe 
Tested-by: Terrence Xu 
Tested-by: Nicolin Chen 
Tested-by: Matthew Rosato 
Tested-by: Yanting Jiang 
Tested-by: Shameer Kolothum 
Tested-by: Zhenzhong Duan 
Signed-off-by: Yi Liu 
Link: https://lore.kernel.org/r/20230718135551.6592-14-yi.l.liu@intel.com
Signed-off-by: Alex Williamson

vfio/platform: Cleanup Kconfig

2023-06-16T18:23:50+00:00

Like vfio-pci, there's also a base module here where vfio-amba depends on
vfio-platform, when really it only needs vfio-platform-base.  Create a
sub-menu for platform drivers and a nested menu for reset drivers.  Cleanup
Makefile to make use of new CONFIG_VFIO_PLATFORM_BASE for building the
shared modules and traversing reset modules.

Reviewed-by: Cédric Le Goater 
Reviewed-by: Eric Auger 
Link: https://lore.kernel.org/r/20230614193948.477036-3-alex.williamson@redhat.com
Signed-off-by: Alex Williamson

vfio: platform: ignore missing reset if disabled at module init

2023-02-01T19:25:41+00:00

If reset requirement was relaxed via module parameter, errors caused by
missing reset should not be propagated down to the vfio core.
Otherwise initialization will fail.

Signed-off-by: Tomasz Duszynski 
Fixes: 5f6c7e0831a1 ("vfio/platform: Use the new device life cycle helpers")
Reviewed-by: Kevin Tian 
Reviewed-by: Eric Auger 
Link: https://lore.kernel.org/r/20230131083349.2027189-1-tduszynski@marvell.com
Signed-off-by: Alex Williamson

vfio/platform: Use GFP_KERNEL_ACCOUNT for userspace persistent allocations

2023-01-23T18:26:30+00:00

Use GFP_KERNEL_ACCOUNT for userspace persistent allocations.

The GFP_KERNEL_ACCOUNT option lets the memory allocator know that this
is untrusted allocation triggered from userspace and should be a subject
of kmem accounting, and as such it is controlled by the cgroup
mechanism.

Signed-off-by: Yishai Hadas 
Reviewed-by: Jason Gunthorpe 
Link: https://lore.kernel.org/r/20230108154427.32609-7-yishaih@nvidia.com
Signed-off-by: Alex Williamson

vfio: platform: No need to check res again

2023-01-23T18:26:28+00:00

In function vfio_platform_regions_init(),we did check res implied
by using while loop,
so no need to check whether res be null or not again.

No functional change intended.

Signed-off-by: Angus Chen 
Reviewed-by: Eric Auger 
Link: https://lore.kernel.org/r/20230107034721.2127-1-angus.chen@jaguarmicro.com
Signed-off-by: Alex Williamson

Merge tag 'vfio-v6.2-rc1' of https://github.com/awilliam/linux-vfio

2022-12-15T21:12:15+00:00

Pull VFIO updates from Alex Williamson:

 - Replace deprecated git://github.com link in MAINTAINERS (Palmer
   Dabbelt)

 - Simplify vfio/mlx5 with module_pci_driver() helper (Shang XiaoJing)

 - Drop unnecessary buffer from ACPI call (Rafael Mendonca)

 - Correct latent missing include issue in iova-bitmap and fix support
   for unaligned bitmaps. Follow-up with better fix through refactor
   (Joao Martins)

 - Rework ccw mdev driver to split private data from parent structure,
   better aligning with the mdev lifecycle and allowing us to remove a
   temporary workaround (Eric Farman)

 - Add an interface to get an estimated migration data size for a
   device, allowing userspace to make informed decisions, ex. more
   accurately predicting VM downtime (Yishai Hadas)

 - Fix minor typo in vfio/mlx5 array declaration (Yishai Hadas)

 - Simplify module and Kconfig through consolidating SPAPR/EEH code and
   config options and folding virqfd module into main vfio module (Jason
   Gunthorpe)

 - Fix error path from device_register() across all vfio mdev and sample
   drivers (Alex Williamson)

 - Define migration pre-copy interface and implement for vfio/mlx5
   devices, allowing portions of the device state to be saved while the
   device continues operation, towards reducing the stop-copy state size
   (Jason Gunthorpe, Yishai Hadas, Shay Drory)

 - Implement pre-copy for hisi_acc devices (Shameer Kolothum)

 - Fixes to mdpy mdev driver remove path and error path on probe (Shang
   XiaoJing)

 - vfio/mlx5 fixes for incorrect return after copy_to_user() fault and
   incorrect buffer freeing (Dan Carpenter)

* tag 'vfio-v6.2-rc1' of https://github.com/awilliam/linux-vfio: (42 commits)
  vfio/mlx5: error pointer dereference in error handling
  vfio/mlx5: fix error code in mlx5vf_precopy_ioctl()
  samples: vfio-mdev: Fix missing pci_disable_device() in mdpy_fb_probe()
  hisi_acc_vfio_pci: Enable PRE_COPY flag
  hisi_acc_vfio_pci: Move the dev compatibility tests for early check
  hisi_acc_vfio_pci: Introduce support for PRE_COPY state transitions
  hisi_acc_vfio_pci: Add support for precopy IOCTL
  vfio/mlx5: Enable MIGRATION_PRE_COPY flag
  vfio/mlx5: Fallback to STOP_COPY upon specific PRE_COPY error
  vfio/mlx5: Introduce multiple loads
  vfio/mlx5: Consider temporary end of stream as part of PRE_COPY
  vfio/mlx5: Introduce vfio precopy ioctl implementation
  vfio/mlx5: Introduce SW headers for migration states
  vfio/mlx5: Introduce device transitions of PRE_COPY
  vfio/mlx5: Refactor to use queue based data chunks
  vfio/mlx5: Refactor migration file state
  vfio/mlx5: Refactor MKEY usage
  vfio/mlx5: Refactor PD usage
  vfio/mlx5: Enforce a single SAVE command at a time
  vfio: Extend the device migration protocol with PRE_COPY
  ...

vfio-iommufd: Support iommufd for physical VFIO devices

2022-12-02T15:52:03+00:00

This creates the iommufd_device for the physical VFIO drivers. These are
all the drivers that are calling vfio_register_group_dev() and expect the
type1 code to setup a real iommu_domain against their parent struct
device.

The design gives the driver a choice in how it gets connected to iommufd
by providing bind_iommufd/unbind_iommufd/attach_ioas callbacks to
implement as required. The core code provides three default callbacks for
physical mode using a real iommu_domain. This is suitable for drivers
using vfio_register_group_dev()

Link: https://lore.kernel.org/r/6-v4-42cd2eb0e3eb+335a-vfio_iommufd_jgg@nvidia.com
Reviewed-by: Kevin Tian 
Reviewed-by: Alex Williamson 
Tested-by: Alex Williamson 
Tested-by: Nicolin Chen 
Tested-by: Yi Liu 
Tested-by: Lixiao Yang 
Tested-by: Matthew Rosato 
Tested-by: Yu He 
Signed-off-by: Jason Gunthorpe

vfio: Remove vfio_free_device

2022-11-10T18:30:23+00:00

With the "mess" sorted out, we should be able to inline the
vfio_free_device call introduced by commit cb9ff3f3b84c
("vfio: Add helpers for unifying vfio_device life cycle")
and remove them from driver release callbacks.

Signed-off-by: Eric Farman 
Reviewed-by: Jason Gunthorpe 
Reviewed-by: Kevin Tian 
Reviewed-by: Cornelia Huck 
Reviewed-by: Tony Krowiak 	# vfio-ap part
Reviewed-by: Matthew Rosato 
Link: https://lore.kernel.org/r/20221104142007.1314999-8-farman@linux.ibm.com
Signed-off-by: Alex Williamson

vfio: platform: Do not pass return buffer to ACPI _RST method

2022-11-09T23:39:51+00:00

The ACPI _RST method has no return value, there's no need to pass a return
buffer to acpi_evaluate_object().

Fixes: d30daa33ec1d ("vfio: platform: call _RST method when using ACPI")
Signed-off-by: Rafael Mendonca 
Reviewed-by: Eric Auger 
Link: https://lore.kernel.org/r/20221018152825.891032-1-rafaelmendsr@gmail.com
Signed-off-by: Alex Williamson

vfio/amba: Use the new device life cycle helpers

2022-09-21T20:15:11+00:00

Implement amba's own vfio_device_ops.

Remove vfio_platform_probe/remove_common() given no user now.

Signed-off-by: Kevin Tian 
Reviewed-by: Jason Gunthorpe 
Reviewed-by: Eric Auger 
Link: https://lore.kernel.org/r/20220921104401.38898-13-kevin.tian@intel.com
Signed-off-by: Alex Williamson