Feng Liu a084983dcd virtio_ring: Allow non power of 2 sizes for packed virtqueue ...

According to the Virtio Specification, the Queue Size parameter of a
virtqueue corresponds to the maximum number of descriptors in that
queue, and it does not have to be a power of 2 for packed virtqueues.
However, the virtio_pci_modern driver enforced a power of 2 check for
virtqueue sizes, which is unnecessary and restrictive for packed
virtuqueue.

Split virtqueue still needs to check the virtqueue size is power_of_2
which has been done in vring_alloc_queue_split of the virtio_ring layer.

To validate this change, we tested various virtqueue sizes for packed
rings, including 128, 256, 512, 100, 200, 500, and 1000, with
CONFIG_PAGE_POISONING enabled, and all tests passed successfully.

Signed-off-by: Feng Liu <feliu@nvidia.com>
Reviewed-by: Jiri Pirko <jiri@nvidia.com>

Message-Id: <20230315185458.11638-2-feliu@nvidia.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

2023-04-21 03:02:31 -04:00

..

Kconfig

virtio: fatures, fixes

2022-08-12 09:50:34 -07:00

Makefile

virtio: replace restricted mem access flag with callback

2022-08-01 07:42:49 +02:00

virtio_anchor.c

virtio: replace restricted mem access flag with callback

2022-08-01 07:42:49 +02:00

virtio_balloon.c

- The usual batches of cleanups from Baoquan He, Muchun Song, Miaohe

2022-08-05 16:32:45 -07:00

virtio_dma_buf.c

dma-buf: move dma-buf symbols into the DMA_BUF module namespace

2021-10-25 14:53:08 +02:00

virtio_input.c

virtio: wrap config->reset calls

2022-01-14 18:50:52 -05:00

virtio_mem.c

mm: use is_zone_movable_page() helper

2022-07-29 18:07:20 -07:00

virtio_mmio.c

virtio: Revert "virtio: find_vqs() add arg sizes"

2022-08-16 01:40:24 -04:00

virtio_pci_common.c

virtio_pci: use irq to detect interrupt support

2022-10-13 09:33:03 -04:00

virtio_pci_common.h

virtio: Revert "virtio: find_vqs() add arg sizes"

2022-08-16 01:40:24 -04:00

virtio_pci_legacy_dev.c

virtio/virtio_pci_legacy_dev: ensure the correct return value

2022-01-14 18:50:53 -05:00

virtio_pci_legacy.c

virtio_pci: Revert "virtio_pci: support the arg sizes of find_vqs()"

2022-08-16 01:38:29 -04:00

virtio_pci_modern_dev.c

virtio_pci: introduce helper to get/set queue reset

2022-08-11 04:06:40 -04:00

virtio_pci_modern.c

virtio_ring: Allow non power of 2 sizes for packed virtqueue

2023-04-21 03:02:31 -04:00

virtio_ring.c

virtio_ring: Use const to annotate read-only pointer params

2023-04-21 03:02:30 -04:00

virtio_vdpa.c

virtio-vdpa: support per vq dma device

2023-02-20 19:26:58 -05:00

virtio.c

driver core: make struct bus_type.uevent() take a const *

2023-01-27 13:45:52 +01:00