linux-toradex.git/Documentation/s390, branch master

docs: move s390 under arch

2023-07-24T10:12:24+00:00

and fix all in-tree references.

Architecture-specific documentation is being moved into Documentation/arch/
as a way of cleaning up the top-level documentation directory and making
the docs hierarchy more closely match the source hierarchy.

Signed-off-by: Costa Shulyupin 
Reviewed-by: Tony Krowiak 
Acked-by: Jonathan Corbet 
Acked-by: Heiko Carstens 
Reviewed-by: Philippe Mathieu-Daudé 
Reviewed-by: Randy Dunlap 
Link: https://lore.kernel.org/r/20230718045550.495428-1-costa.shul@redhat.com
Signed-off-by: Heiko Carstens

s390/iommu: get rid of S390_CCW_IOMMU and S390_AP_IOMMU

2023-05-17T13:20:18+00:00

These don't do anything anymore, the only user of the symbol was
VFIO_CCW/AP which already "depends on VFIO" and VFIO itself selects
IOMMU_API.

When this was added VFIO was wrongly doing "depends on IOMMU_API" which
required some contortions like this to ensure IOMMU_API was turned on.

Reviewed-by: Eric Farman 
Signed-off-by: Jason Gunthorpe 
Link: https://lore.kernel.org/r/0-v2-eb322ce2e547+188f-rm_iommu_ccw_jgg@nvidia.com
Signed-off-by: Alexander Gordeev

Merge tag 'vfio-v6.3-rc1' of https://github.com/awilliam/linux-vfio

2023-02-25T19:52:57+00:00

Pull VFIO updates from Alex Williamson:

 - Remove redundant resource check in vfio-platform (Angus Chen)

 - Use GFP_KERNEL_ACCOUNT for persistent userspace allocations, allowing
   removal of arbitrary kernel limits in favor of cgroup control (Yishai
   Hadas)

 - mdev tidy-ups, including removing the module-only build restriction
   for sample drivers, Kconfig changes to select mdev support,
   documentation movement to keep sample driver usage instructions with
   sample drivers rather than with API docs, remove references to
   out-of-tree drivers in docs (Christoph Hellwig)

 - Fix collateral breakages from mdev Kconfig changes (Arnd Bergmann)

 - Make mlx5 migration support match device support, improve source and
   target flows to improve pre-copy support and reduce downtime (Yishai
   Hadas)

 - Convert additional mdev sysfs case to use sysfs_emit() (Bo Liu)

 - Resolve copy-paste error in mdev mbochs sample driver Kconfig (Ye
   Xingchen)

 - Avoid propagating missing reset error in vfio-platform if reset
   requirement is relaxed by module option (Tomasz Duszynski)

 - Range size fixes in mlx5 variant driver for missed last byte and
   stricter range calculation (Yishai Hadas)

 - Fixes to suspended vaddr support and locked_vm accounting, excluding
   mdev configurations from the former due to potential to indefinitely
   block kernel threads, fix underflow and restore locked_vm on new mm
   (Steve Sistare)

 - Update outdated vfio documentation due to new IOMMUFD interfaces in
   recent kernels (Yi Liu)

 - Resolve deadlock between group_lock and kvm_lock, finally (Matthew
   Rosato)

 - Fix NULL pointer in group initialization error path with IOMMUFD (Yan
   Zhao)

* tag 'vfio-v6.3-rc1' of https://github.com/awilliam/linux-vfio: (32 commits)
  vfio: Fix NULL pointer dereference caused by uninitialized group->iommufd
  docs: vfio: Update vfio.rst per latest interfaces
  vfio: Update the kdoc for vfio_device_ops
  vfio/mlx5: Fix range size calculation upon tracker creation
  vfio: no need to pass kvm pointer during device open
  vfio: fix deadlock between group lock and kvm lock
  vfio: revert "iommu driver notify callback"
  vfio/type1: revert "implement notify callback"
  vfio/type1: revert "block on invalid vaddr"
  vfio/type1: restore locked_vm
  vfio/type1: track locked_vm per dma
  vfio/type1: prevent underflow of locked_vm via exec()
  vfio/type1: exclude mdevs from VFIO_UPDATE_VADDR
  vfio: platform: ignore missing reset if disabled at module init
  vfio/mlx5: Improve the target side flow to reduce downtime
  vfio/mlx5: Improve the source side flow upon pre_copy
  vfio/mlx5: Check whether VF is migratable
  samples: fix the prompt about SAMPLE_VFIO_MDEV_MBOCHS
  vfio/mdev: Use sysfs_emit() to instead of sprintf()
  vfio-mdev: add back CONFIG_VFIO dependency
  ...

Documentation: s390: correct spelling

2023-02-10T09:55:30+00:00

Correct spelling problems for Documentation/s390/ as reported
by codespell.

Signed-off-by: Randy Dunlap 
Acked-by: Heiko Carstens 
Link: https://lore.kernel.org/r/20230209071400.31476-16-rdunlap@infradead.org
Signed-off-by: Heiko Carstens

vfio-mdev: turn VFIO_MDEV into a selectable symbol

2023-01-23T18:26:29+00:00

VFIO_MDEV is just a library with helpers for the drivers.  Stop making
it a user choice and just select it by the drivers that use the helpers.

Signed-off-by: Christoph Hellwig 
Reviewed-by: Jason Gunthorpe 
Reviewed-by: Tony Krowiak 
Link: https://lore.kernel.org/r/20230110091009.474427-3-hch@lst.de
Signed-off-by: Alex Williamson

vfio/ccw: remove old IDA format restrictions

2023-01-09T13:34:09+00:00

By this point, all the pieces are in place to properly support
a 2K Format-2 IDAL, and to convert a guest Format-1 IDAL to
the 2K Format-2 variety. Let's remove the fence that prohibits
them, and allow a guest to submit them if desired.

Signed-off-by: Eric Farman 
Reviewed-by: Matthew Rosato 
Signed-off-by: Heiko Carstens

vfio/mdev: embedd struct mdev_parent in the parent data structure

2022-10-04T18:06:58+00:00

Simplify mdev_{un}register_device by requiring the caller to pass in
a structure allocate as part of the parent device structure.  This
removes the need for a list of parents and the separate mdev_parent
refcount as we can simplify rely on the reference to the parent device.

Signed-off-by: Christoph Hellwig 
Reviewed-by: Jason Gunthorpe 
Reviewed-by: Tony Krowiak 
Reviewed-by: Kevin Tian 
Reviewed-by: Kirti Wankhede 
Reviewed-by: Eric Farman 
Link: https://lore.kernel.org/r/20220923092652.100656-5-hch@lst.de
Signed-off-by: Alex Williamson

s390/docs: fix warnings for vfio_ap driver doc

2022-07-22T11:54:07+00:00

Fix multiple warnings produced by make htmldocs

Fixes: cb269e0aba7c ("s390/vfio-ap: update docs to include dynamic config support")
Signed-off-by: Alexander Gordeev

s390/docs: fix warnings for vfio_ap driver lock usage doc

2022-07-22T11:54:06+00:00

Fix multiple warnings produced by make htmldocs

Fixes: e32d3827f3d5 ("s390/Docs: new doc describing lock usage by the vfio_ap device driver")
Signed-off-by: Alexander Gordeev

s390/Docs: new doc describing lock usage by the vfio_ap device driver

2022-07-19T14:18:12+00:00

Introduces a new document describing the locks used by the vfio_ap device
driver and how to use them so as to avoid lockdep reports and deadlock
situations.

Signed-off-by: Tony Krowiak 
Reviewed-by: Jason J. Herne 
Signed-off-by: Alexander Gordeev