[RFC v3 0/3] Add packed virtqueue to shadow virtqueue

[Sahil Siddiq]

Hi,

Here's a new patch series that incorporates all
the suggested changes from v2.

I have tried my best to deduplicate the implementation.
Please let me know if I have missed something.

I'll also test these changes out by following the
suggestions given in response to v1. I'll have more
confidence once I know these changes work.

Thanks,
Sahil

v1: https://lists.nongnu.org/archive/html/qemu-devel/2024-06/msg03417.html
v2: https://lists.nongnu.org/archive/html/qemu-devel/2024-07/msg06196.html

Changes v2 -> v3:
* vhost-shadow-virtqueue.c
  - Move parts common to "vhost_svq_add_split" and
    "vhost_svq_add_packed" to "vhost_svq_add".
  (vhost_svq_add_packed):
  - Refactor to minimize duplicate code between
    this and "vhost_svq_add_split"
  - Fix code style issues.
  (vhost_svq_add_split):
  - Merge with "vhost_svq_vring_write_descs()"
  - Refactor to minimize duplicate code between
    this and "vhost_svq_add_packed"
  (vhost_svq_add):
  - Refactor to minimize duplicate code between
    split and packed version of "vhost_svq_add"
  (vhost_svq_memory_packed): New function
  (vhost_svq_start):
  - Remove common variables out of if-else branch.
  (vhost_svq_stop):
  - Add support for packed vq.
  (vhost_svq_get_vring_addr): Revert changes
  (vhost_svq_get_vring_addr_packed): Likwise.
* vhost-shadow-virtqueue.h
  - Revert changes made to "vhost_svq_get_vring_addr*"
    functions.
* vhost-vdpa.c: Revert changes.

Sahil Siddiq (3):
  vhost: Introduce packed vq and add buffer elements
  vhost: Data structure changes to support packed vqs
  vhost: Allocate memory for packed vring

 hw/virtio/vhost-shadow-virtqueue.c | 230 ++++++++++++++++++++---------
 hw/virtio/vhost-shadow-virtqueue.h |  70 ++++++---
 2 files changed, 206 insertions(+), 94 deletions(-)

-- 
2.45.2