vdpa_sim: Implement suspend vdpa op

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Implement suspend operation for vdpa_sim devices, so vhost-vdpa will
offer that backend feature and userspace can effectively suspend the
device.

This is a must before get virtqueue indexes (base) for live migration,
since the device could modify them after userland gets them. There are
individual ways to perform that action for some devices
(VHOST_NET_SET_BACKEND, VHOST_VSOCK_SET_RUNNING, ...) but there was no
way to perform it for any vhost device (and, in particular, vhost-vdpa).

Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>
Signed-off-by: Eugenio Pérez <eperezma@redhat.com>
Message-Id: <20220810171512.2343333-5-eperezma@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>

...

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Eugenio Pérez 2022-08-10 19:15:12 +02:00 • committed by Michael S. Tsirkin

parent f345a0143b

commit 0c89e2a3a9

4 changed files with 21 additions and 0 deletions

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14

drivers/vdpa/vdpa_sim/vdpa_sim.c

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1

drivers/vdpa/vdpa_sim/vdpa_sim.h

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3

drivers/vdpa/vdpa_sim/vdpa_sim_blk.c

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3

drivers/vdpa/vdpa_sim/vdpa_sim_net.c

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