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| author | David Hildenbrand <david@redhat.com> | 2021-04-13 11:55:23 +0200 |
|---|---|---|
| committer | Eduardo Habkost <ehabkost@redhat.com> | 2021-07-08 15:54:45 -0400 |
| commit | 2044969f0b27fa67f2b69bc710eaef45998cb6fb (patch) | |
| tree | 5649d2f1d2338675082c09b41f4cd1a151d043bc /include/hw/virtio/virtio-mem.h | |
| parent | 3aca6380fdf566e518640de0d90ea6fa74b41825 (diff) | |
| download | qemu-2044969f0b27fa67f2b69bc710eaef45998cb6fb.zip qemu-2044969f0b27fa67f2b69bc710eaef45998cb6fb.tar.gz qemu-2044969f0b27fa67f2b69bc710eaef45998cb6fb.tar.bz2 | |
virtio-mem: Implement RamDiscardManager interface
Let's properly notify when (un)plugging blocks, after discarding memory
and before allowing the guest to consume memory. Handle errors from
notifiers gracefully (e.g., no remaining VFIO mappings) when plugging,
rolling back the change and telling the guest that the VM is busy.
One special case to take care of is replaying all notifications after
restoring the vmstate. The device starts out with all memory discarded,
so after loading the vmstate, we have to notify about all plugged
blocks.
Acked-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Cc: Paolo Bonzini <pbonzini@redhat.com>
Cc: "Michael S. Tsirkin" <mst@redhat.com>
Cc: Alex Williamson <alex.williamson@redhat.com>
Cc: Dr. David Alan Gilbert <dgilbert@redhat.com>
Cc: Igor Mammedov <imammedo@redhat.com>
Cc: Pankaj Gupta <pankaj.gupta.linux@gmail.com>
Cc: Peter Xu <peterx@redhat.com>
Cc: Auger Eric <eric.auger@redhat.com>
Cc: Wei Yang <richard.weiyang@linux.alibaba.com>
Cc: teawater <teawaterz@linux.alibaba.com>
Cc: Marek Kedzierski <mkedzier@redhat.com>
Signed-off-by: David Hildenbrand <david@redhat.com>
Message-Id: <20210413095531.25603-6-david@redhat.com>
Signed-off-by: Eduardo Habkost <ehabkost@redhat.com>
Diffstat (limited to 'include/hw/virtio/virtio-mem.h')
| -rw-r--r-- | include/hw/virtio/virtio-mem.h | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/include/hw/virtio/virtio-mem.h b/include/hw/virtio/virtio-mem.h index 4eeb82d..9a6e348 100644 --- a/include/hw/virtio/virtio-mem.h +++ b/include/hw/virtio/virtio-mem.h @@ -67,6 +67,9 @@ struct VirtIOMEM { /* don't migrate unplugged memory */ NotifierWithReturn precopy_notifier; + + /* listeners to notify on plug/unplug activity. */ + QLIST_HEAD(, RamDiscardListener) rdl_list; }; struct VirtIOMEMClass { |