linux-toradex.git/drivers/vhost, branch v6.19-rc2

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

2025-12-05T02:59:21+00:00

Pull virtio updates from Michael Tsirkin:
 "Just a bunch of fixes and cleanups, mostly very simple. Several
  features were merged through net-next this time around"

* tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost:
  virtio_pci: drop kernel.h
  vhost: switch to arrays of feature bits
  vhost/test: add test specific macro for features
  virtio: clean up features qword/dword terms
  vduse: add WQ_PERCPU to alloc_workqueue users
  virtio_balloon: add WQ_PERCPU to alloc_workqueue users
  vdpa/pds: use %pe for ERR_PTR() in event handler registration
  vhost: Fix kthread worker cgroup failure handling
  virtio: vdpa: Fix reference count leak in octep_sriov_enable()
  vdpa/mlx5: Fix incorrect error code reporting in query_virtqueues
  virtio: fix map ops comment
  virtio: fix virtqueue_set_affinity() docs
  virtio: standardize Returns documentation style
  virtio: fix grammar in virtio_map_ops docs
  virtio: fix grammar in virtio_queue_info docs
  virtio: fix whitespace in virtio_config_ops
  virtio: fix typo in virtio_device_ready() comment
  virtio: fix kernel-doc for mapping/free_coherent functions
  virtio_vdpa: fix misleading return in void function

vhost: switch to arrays of feature bits

2025-11-30T23:02:43+00:00

The current interface where caller has to know in which 64 bit chunk
each bit is, is inelegant and fragile.
Let's simply use arrays of bits.
By using unroll macros text size grows only slightly.

Message-ID: <637e182e139980e5930d50b928ba5ac072d628a9.1764225384.git.mst@redhat.com>
Signed-off-by: Michael S. Tsirkin

vhost/test: add test specific macro for features

2025-11-27T07:03:07+00:00

test just uses vhost features with no change,
but people tend to copy/paste code, so let's
add our own define.

Message-ID: <23ca04512a800ee8b3594482492e536020931340.1764225384.git.mst@redhat.com>
Signed-off-by: Michael S. Tsirkin

virtio: clean up features qword/dword terms

2025-11-27T07:03:07+00:00

virtio pci uses word to mean "16 bits". mmio uses it to mean
"32 bits".

To avoid confusion, let's avoid the term in core virtio
altogether. Just say U64 to mean "64 bit".

Fixes: e7d4c1c5a546 ("virtio: introduce extended features")
Cc: Paolo Abeni 
Acked-by: Jason Wang 
Message-ID: 
Signed-off-by: Michael S. Tsirkin

vhost: Fix kthread worker cgroup failure handling

2025-11-27T07:03:06+00:00

If we fail to attach to a cgroup we are leaking the id. This adds
a new goto to free the id.

Fixes: 7d9896e9f6d0 ("vhost: Reintroduce kthread API and add mode selection")
Signed-off-by: Mike Christie 
Acked-by: Jason Wang 
Reviewed-by: Chaitanya Kulkarni 
Signed-off-by: Michael S. Tsirkin 
Message-Id: <20251101194358.13605-1-michael.christie@oracle.com>

vhost: rewind next_avail_head while discarding descriptors

2025-11-26T22:44:58+00:00

When discarding descriptors with IN_ORDER, we should rewind
next_avail_head otherwise it would run out of sync with
last_avail_idx. This would cause driver to report
"id X is not a head".

Fixing this by returning the number of descriptors that is used for
each buffer via vhost_get_vq_desc_n() so caller can use the value
while discarding descriptors.

Fixes: 67a873df0c41 ("vhost: basic in order support")
Cc: stable@vger.kernel.org
Signed-off-by: Jason Wang 
Acked-by: Michael S. Tsirkin 
Link: https://patch.msgid.link/20251120022950.10117-1-jasowang@redhat.com
Signed-off-by: Jakub Kicinski

vdpa: support virtio_map

2025-10-01T11:24:43+00:00

Virtio core switches from DMA device to virtio_map, let's do that
as well for vDPA.

Signed-off-by: Jason Wang 
Message-Id: <20250821064641.5025-8-jasowang@redhat.com>
Signed-off-by: Michael S. Tsirkin 
Tested-by: Lei Yang 
Reviewed-by: Eugenio Pérez

vhost: vringh: Fix copy_to_iter return value check

2025-10-01T11:24:31+00:00

The return value of copy_to_iter can't be negative, check whether the
copied length is equal to the requested length instead of checking for
negative values.

Fixes: 309bba39c945 ("vringh: iterate on iotlb_translate to handle large translations")
Cc: "Stefano Garzarella" 
Cc: zhang jiao 
Link: https://lore.kernel.org/all/20250910091739.2999-1-zhangjiao2@cmss.chinamobile.com
Message-ID: 
Signed-off-by: Michael S. Tsirkin

vhost: vringh: Modify the return value check

2025-10-01T11:24:20+00:00

The return value of copy_from_iter and copy_to_iter can't be negative,
check whether the copied lengths are equal.

Fixes: 309bba39c945 ("vringh: iterate on iotlb_translate to handle large translations")
Cc: "Stefano Garzarella" 
Signed-off-by: zhang jiao 
Message-Id: <20250910091739.2999-1-zhangjiao2@cmss.chinamobile.com>
Signed-off-by: Michael S. Tsirkin

vhost-net: flush batched before enabling notifications

2025-09-19T08:15:26+00:00

Commit 8c2e6b26ffe2 ("vhost/net: Defer TX queue re-enable until after
sendmsg") tries to defer the notification enabling by moving the logic
out of the loop after the vhost_tx_batch() when nothing new is spotted.
This caused unexpected side effects as the new logic is reused for
several other error conditions.

A previous patch reverted 8c2e6b26ffe2. Now, bring the performance
back up by flushing batched buffers before enabling notifications.

Reported-by: Jon Kohler 
Cc: stable@vger.kernel.org
Fixes: 8c2e6b26ffe2 ("vhost/net: Defer TX queue re-enable until after sendmsg")
Signed-off-by: Jason Wang 
Signed-off-by: Michael S. Tsirkin 
Message-Id: <20250917063045.2042-3-jasowang@redhat.com>