vdpasim: control virtqueue support (!1088) · Merge requests · Red Hat / centos-stream / src / kernel / centos-stream-9

Eugenio Pérez requested to merge eperezmartin/centos-stream-9:asid into main Jul 04, 2022

Bugzilla: https://bugzilla.redhat.com/1939367 Tested: Run qemu with support of CVQ tracking using ASID. https://lists.nongnu.org/archive/html/qemu-devel/2022-06/msg01259.html . Upstream Status: Merged Conflicts: Backends alibaba/eni_vdpa and vdpa_user/vduse_dev not present downstream.

Kernel vDPA support of isolating cvq DMA in its own IOTLB/Address Space, so VMM can track virtio-net status changes through CVQ. This allows hypervisor to migrate a virti-net device with all its guest-visible status (MAC address, number of queues actives, ...).

In particular, its support is implemented in vdpasim_net, so these devices can be migrated.

Signed-off-by: Eugenio Pérez eperezma@redhat.com

Edited Jul 04, 2022 by Eugenio Pérez

vdpasim: control virtqueue support

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