linux-toradex.git/drivers/virtio, branch v7.0-rc7

dma-mapping: Clarify valid conditions for CPU cache line overlap

2026-03-20T10:33:24+00:00

Rename the DMA_ATTR_CPU_CACHE_CLEAN attribute to better reflect that it
is debugging aid to inform DMA core code that CPU cache line overlaps are
allowed, and refine the documentation describing its use.

Signed-off-by: Leon Romanovsky 
Signed-off-by: Marek Szyprowski 
Link: https://lore.kernel.org/r/20260316-dma-debug-overlap-v3-3-1dde90a7f08b@nvidia.com

Convert more 'alloc_obj' cases to default GFP_KERNEL arguments

2026-02-22T04:03:00+00:00

This converts some of the visually simpler cases that have been split
over multiple lines.  I only did the ones that are easy to verify the
resulting diff by having just that final GFP_KERNEL argument on the next
line.

Somebody should probably do a proper coccinelle script for this, but for
me the trivial script actually resulted in an assertion failure in the
middle of the script.  I probably had made it a bit _too_ trivial.

So after fighting that far a while I decided to just do some of the
syntactically simpler cases with variations of the previous 'sed'
scripts.

The more syntactically complex multi-line cases would mostly really want
whitespace cleanup anyway.

Signed-off-by: Linus Torvalds

Convert 'alloc_obj' family to use the new default GFP_KERNEL argument

2026-02-22T01:09:51+00:00

This was done entirely with mindless brute force, using

    git grep -l '\

treewide: Replace kmalloc with kmalloc_obj for non-scalar types

2026-02-21T09:02:28+00:00

This is the result of running the Coccinelle script from
scripts/coccinelle/api/kmalloc_objs.cocci. The script is designed to
avoid scalar types (which need careful case-by-case checking), and
instead replace kmalloc-family calls that allocate struct or union
object instances:

Single allocations:	kmalloc(sizeof(TYPE), ...)
are replaced with:	kmalloc_obj(TYPE, ...)

Array allocations:	kmalloc_array(COUNT, sizeof(TYPE), ...)
are replaced with:	kmalloc_objs(TYPE, COUNT, ...)

Flex array allocations:	kmalloc(struct_size(PTR, FAM, COUNT), ...)
are replaced with:	kmalloc_flex(*PTR, FAM, COUNT, ...)

(where TYPE may also be *VAR)

The resulting allocations no longer return "void *", instead returning
"TYPE *".

Signed-off-by: Kees Cook

Merge tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost

2026-02-13T20:02:18+00:00

Pull virtio updates from Michael Tsirkin:

 - in-order support in virtio core

 - multiple address space support in vduse

 - fixes, cleanups all over the place, notably dma alignment fixes for
   non-cache-coherent systems

* tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost: (59 commits)
  vduse: avoid adding implicit padding
  vhost: fix caching attributes of MMIO regions by setting them explicitly
  vdpa/mlx5: update MAC address handling in mlx5_vdpa_set_attr()
  vdpa/mlx5: reuse common function for MAC address updates
  vdpa/mlx5: update mlx_features with driver state check
  crypto: virtio: Replace package id with numa node id
  crypto: virtio: Remove duplicated virtqueue_kick in virtio_crypto_skcipher_crypt_req
  crypto: virtio: Add spinlock protection with virtqueue notification
  Documentation: Add documentation for VDUSE Address Space IDs
  vduse: bump version number
  vduse: add vq group asid support
  vduse: merge tree search logic of IOTLB_GET_FD and IOTLB_GET_INFO ioctls
  vduse: take out allocations from vduse_dev_alloc_coherent
  vduse: remove unused vaddr parameter of vduse_domain_free_coherent
  vduse: refactor vdpa_dev_add for goto err handling
  vhost: forbid change vq groups ASID if DRIVER_OK is set
  vdpa: document set_group_asid thread safety
  vduse: return internal vq group struct as map token
  vduse: add vq group support
  vduse: add v1 API definition
  ...

mm: rename CONFIG_MEMORY_BALLOON -> CONFIG_BALLOON

2026-01-31T22:22:36+00:00

Let's make it consistent with the naming of the files but also with the
naming of CONFIG_BALLOON_MIGRATION.

While at it, add a "/* CONFIG_BALLOON */".

Link: https://lkml.kernel.org/r/20260119230133.3551867-24-david@kernel.org
Signed-off-by: David Hildenbrand (Red Hat) 
Reviewed-by: Lorenzo Stoakes 
Acked-by: Michael S. Tsirkin 
Cc: Arnd Bergmann 
Cc: Christophe Leroy 
Cc: Eugenio Pérez 
Cc: Greg Kroah-Hartman 
Cc: Jason Wang 
Cc: Jerrin Shaji George 
Cc: Jonathan Corbet 
Cc: Liam Howlett 
Cc: Madhavan Srinivasan 
Cc: Michael Ellerman 
Cc: Michal Hocko 
Cc: Mike Rapoport 
Cc: Nicholas Piggin 
Cc: Oscar Salvador 
Cc: SeongJae Park 
Cc: Suren Baghdasaryan 
Cc: Vlastimil Babka 
Cc: Xuan Zhuo 
Cc: Zi Yan 
Signed-off-by: Andrew Morton

mm: rename CONFIG_BALLOON_COMPACTION to CONFIG_BALLOON_MIGRATION

2026-01-31T22:22:36+00:00

While compaction depends on migration, the other direction is not the
case.  So let's make it clearer that this is all about migration of
balloon pages.

Adjust all comments/docs in the core to talk about "migration" instead of
"compaction".

While at it add some "/* CONFIG_BALLOON_MIGRATION */".

Link: https://lkml.kernel.org/r/20260119230133.3551867-23-david@kernel.org
Signed-off-by: David Hildenbrand (Red Hat) 
Reviewed-by: Lorenzo Stoakes 
Acked-by: Michael S. Tsirkin 
Cc: Arnd Bergmann 
Cc: Christophe Leroy 
Cc: Eugenio Pérez 
Cc: Greg Kroah-Hartman 
Cc: Jason Wang 
Cc: Jerrin Shaji George 
Cc: Jonathan Corbet 
Cc: Liam Howlett 
Cc: Madhavan Srinivasan 
Cc: Michael Ellerman 
Cc: Michal Hocko 
Cc: Mike Rapoport 
Cc: Nicholas Piggin 
Cc: Oscar Salvador 
Cc: SeongJae Park 
Cc: Suren Baghdasaryan 
Cc: Vlastimil Babka 
Cc: Xuan Zhuo 
Cc: Zi Yan 
Signed-off-by: Andrew Morton

mm: rename balloon_compaction.(c|h) to balloon.(c|h)

2026-01-31T22:22:35+00:00

Even without CONFIG_BALLOON_COMPACTION this infrastructure implements
basic list and page management for a memory balloon.

Link: https://lkml.kernel.org/r/20260119230133.3551867-21-david@kernel.org
Signed-off-by: David Hildenbrand (Red Hat) 
Reviewed-by: Lorenzo Stoakes 
Acked-by: Michael S. Tsirkin 
Cc: Arnd Bergmann 
Cc: Christophe Leroy 
Cc: Eugenio Pérez 
Cc: Greg Kroah-Hartman 
Cc: Jason Wang 
Cc: Jerrin Shaji George 
Cc: Jonathan Corbet 
Cc: Liam Howlett 
Cc: Madhavan Srinivasan 
Cc: Michael Ellerman 
Cc: Michal Hocko 
Cc: Mike Rapoport 
Cc: Nicholas Piggin 
Cc: Oscar Salvador 
Cc: SeongJae Park 
Cc: Suren Baghdasaryan 
Cc: Vlastimil Babka 
Cc: Xuan Zhuo 
Cc: Zi Yan 
Signed-off-by: Andrew Morton

drivers/virtio/virtio_balloon: stop using balloon_page_push/pop()

2026-01-31T22:22:33+00:00

Let's stop using these functions so we can remove them.  They look like
belonging to the balloon API for managing the device balloon list when
really they are just simple helpers only used by virtio-balloon.

Let's just inline them and switch to a proper list_for_each_entry_safe().

Link: https://lkml.kernel.org/r/20260119230133.3551867-13-david@kernel.org
Signed-off-by: David Hildenbrand (Red Hat) 
Reviewed-by: Lorenzo Stoakes 
Acked-by: Michael S. Tsirkin 
Cc: Arnd Bergmann 
Cc: Christophe Leroy 
Cc: Eugenio Pérez 
Cc: Greg Kroah-Hartman 
Cc: Jason Wang 
Cc: Jerrin Shaji George 
Cc: Jonathan Corbet 
Cc: Liam Howlett 
Cc: Madhavan Srinivasan 
Cc: Michael Ellerman 
Cc: Michal Hocko 
Cc: Mike Rapoport 
Cc: Nicholas Piggin 
Cc: Oscar Salvador 
Cc: SeongJae Park 
Cc: Suren Baghdasaryan 
Cc: Vlastimil Babka 
Cc: Xuan Zhuo 
Cc: Zi Yan 
Signed-off-by: Andrew Morton

mm/balloon_compaction: centralize adjust_managed_page_count() handling

2026-01-31T22:22:32+00:00

Let's centralize it, by allowing for the driver to enable this handling
through a new flag (bool for now) in the balloon device info.

Note that we now adjust the counter when adding/removing a page into the
balloon list: when removing a page to deflate it, it will now happen
before the driver communicated with hypervisor, not afterwards.

This shouldn't make a difference in practice.

Link: https://lkml.kernel.org/r/20260119230133.3551867-7-david@kernel.org
Signed-off-by: David Hildenbrand (Red Hat) 
Acked-by: Liam R. Howlett 
Acked-by: Michael S. Tsirkin 
Cc: Arnd Bergmann 
Cc: Christophe Leroy 
Cc: Eugenio Pérez 
Cc: Greg Kroah-Hartman 
Cc: Jason Wang 
Cc: Jerrin Shaji George 
Cc: Jonathan Corbet 
Cc: Lorenzo Stoakes 
Cc: Madhavan Srinivasan 
Cc: Michael Ellerman 
Cc: Michal Hocko 
Cc: Mike Rapoport 
Cc: Nicholas Piggin 
Cc: Oscar Salvador 
Cc: SeongJae Park 
Cc: Suren Baghdasaryan 
Cc: Vlastimil Babka 
Cc: Xuan Zhuo 
Cc: Zi Yan 
Signed-off-by: Andrew Morton