3 commits

Author	SHA1	Message	Date
Andrew Scull	fbef3f53d4	virtio_ring: Check used descriptors are chain heads ... When the device returns used buffers, it should refer to the descriptor that is the head of the descriptor chain for that buffer. Confirm this to be the case by tracking the head of descriptor chains that have been made available to the device. Signed-off-by: Andrew Scull <ascull@google.com> Reviewed-by: Simon Glass <sjg@chromium.org>	2022-06-08 09:24:03 -04:00
Andrew Scull	10a1453636	virtio_ring: Maintain a shadow copy of descriptors ... The shared descriptors should only be written by the guest driver, however, the device is still able to overwrite and corrupt them. Maintain a private shadow copy of the descriptors for the driver to use for state tracking, removing the need to read from the shared descriptors. Signed-off-by: Andrew Scull <ascull@google.com> Reviewed-by: Simon Glass <sjg@chromium.org>	2022-06-08 09:24:03 -04:00
Tuomas Tynkkynen	c011641ec4	virtio: Add codes for virtual queue/ring management ... This adds support for managing virtual queue/ring, the channel for high performance I/O between host and guest. Signed-off-by: Tuomas Tynkkynen <tuomas.tynkkynen@iki.fi> Signed-off-by: Bin Meng <bmeng.cn@gmail.com> Reviewed-by: Simon Glass <sjg@chromium.org>	2018-11-14 09:16:27 -08:00