linux/drivers/virtio, branch v5.0

virtio: drop internal struct from UAPI

2019-02-05T20:29:48Z

There's no reason to expose struct vring_packed in UAPI - if we do we won't be able to change or drop it, and it's not part of any interface. Let's move it to virtio_ring.c Cc: Tiwei Bie Signed-off-by: Michael S. Tsirkin

virtio: support VIRTIO_F_ORDER_PLATFORM

2019-01-24T15:15:42Z

This patch introduces the support for VIRTIO_F_ORDER_PLATFORM. If this feature is negotiated, the driver must use the barriers suitable for hardware devices. Otherwise, the device and driver are assumed to be implemented in software, that is they can be assumed to run on identical CPUs in an SMP configuration. Thus a weaker form of memory barriers is sufficient to yield better performance. It is recommended that an add-in card based PCI device offers this feature for portability. The device will fail to operate further or will operate in a slower emulation mode if this feature is offered but not accepted. Signed-off-by: Tiwei Bie Signed-off-by: Michael S. Tsirkin

virtio-balloon: tweak config_changed implementation

2019-01-15T01:15:20Z

virtio-ccw has deadlock issues with reading the config space inside the interrupt context, so we tweak the virtballoon_changed implementation by moving the config read operations into the related workqueue contexts. The config_read_bitmap is used as a flag to the workqueue callbacks about the related config fields that need to be read. The cmd_id_received is also renamed to cmd_id_received_cache, and the value should be obtained via virtio_balloon_cmd_id_received. Reported-by: Christian Borntraeger Signed-off-by: Wei Wang Reviewed-by: Cornelia Huck Reviewed-by: Halil Pasic Signed-off-by: Michael S. Tsirkin Cc: stable@vger.kernel.org Fixes: 86a559787e6f ("virtio-balloon: VIRTIO_BALLOON_F_FREE_PAGE_HINT") Tested-by: Christian Borntraeger

virtio: don't allocate vqs when names[i] = NULL

2019-01-15T01:15:19Z

Some vqs may not need to be allocated when their related feature bits are disabled. So callers may pass in such vqs with "names = NULL". Then we skip such vq allocations. Signed-off-by: Wei Wang Signed-off-by: Michael S. Tsirkin Signed-off-by: Wei Wang Signed-off-by: Wei Wang Reviewed-by: Cornelia Huck Cc: stable@vger.kernel.org Fixes: 86a559787e6f ("virtio-balloon: VIRTIO_BALLOON_F_FREE_PAGE_HINT")

virtio_pci: use queue idx instead of array idx to set up the vq

2019-01-15T01:15:18Z

When find_vqs, there will be no vq[i] allocation if its corresponding names[i] is NULL. For example, the caller may pass in names[i] (i=4) with names[2] being NULL because the related feature bit is turned off, so technically there are 3 queues on the device, and name[4] should correspond to the 3rd queue on the device. So we use queue_idx as the queue index, which is increased only when the queue exists. Signed-off-by: Wei Wang Signed-off-by: Michael S. Tsirkin Signed-off-by: Wei Wang Signed-off-by: Wei Wang

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

2019-01-03T02:54:45Z

Pull virtio/vhost updates from Michael Tsirkin: "Features, fixes, cleanups: - discard in virtio blk - misc fixes and cleanups" * tag 'for_linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mst/vhost: vhost: correct the related warning message vhost: split structs into a separate header file virtio: remove deprecated VIRTIO_PCI_CONFIG() vhost/vsock: switch to a mutex for vhost_vsock_hash virtio_blk: add discard and write zeroes support

virtio: remove deprecated VIRTIO_PCI_CONFIG()

2018-12-19T23:23:49Z

VIRTIO_PCI_CONFIG() is deprecated. Use VIRTIO_PCI_CONFIG_OFF() instead. Signed-off-by: Dongli Zhang Signed-off-by: Michael S. Tsirkin

virtio_ring: advertize packed ring layout

2018-11-27T06:17:40Z

Advertize the packed ring layout support. Signed-off-by: Tiwei Bie Signed-off-by: David S. Miller

virtio_ring: leverage event idx in packed ring

2018-11-27T06:17:39Z

Leverage the EVENT_IDX feature in packed ring to suppress events when it's available. Signed-off-by: Tiwei Bie Signed-off-by: David S. Miller

virtio_ring: introduce packed ring support

2018-11-27T06:17:39Z

Introduce the packed ring support. Packed ring can only be created by vring_create_virtqueue() and each chunk of packed ring will be allocated individually. Packed ring can not be created on preallocated memory by vring_new_virtqueue() or the likes currently. Signed-off-by: Tiwei Bie Signed-off-by: David S. Miller