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| author | David Hildenbrand <david@redhat.com> | 2021-10-27 15:03:24 +0200 |
|---|---|---|
| committer | Michael S. Tsirkin <mst@redhat.com> | 2021-11-01 18:49:10 -0400 |
| commit | e1c1915befbd2a991b20812eef6ad650b5637a36 (patch) | |
| tree | 9cb3397f4e8f13c94874f0c72f3eacd6a257f58d /python/qemu/machine/machine.py | |
| parent | 44d3d8981402ce7eef435dd912f21fb84f1f7c4d (diff) | |
| download | focaccia-qemu-e1c1915befbd2a991b20812eef6ad650b5637a36.tar.gz focaccia-qemu-e1c1915befbd2a991b20812eef6ad650b5637a36.zip | |
vhost-vdpa: Set discarding of RAM broken when initializing the backend
Similar to VFIO, vDPA will go ahead an map+pin all guest memory. Memory that used to be discarded will get re-populated and if we discard+re-access memory after mapping+pinning, the pages mapped into the vDPA IOMMU will go out of sync with the actual pages mapped into the user space page tables. Set discarding of RAM broken such that: - virtio-mem and vhost-vdpa run mutually exclusive - virtio-balloon is inhibited and no memory discards will get issued In the future, we might be able to support coordinated discarding of RAM as used by virtio-mem and already supported by vfio via the RamDiscardManager. Acked-by: Jason Wang <jasowang@redhat.com> Cc: Jason Wang <jasowang@redhat.com> Cc: Michael S. Tsirkin <mst@redhat.com> Cc: Cindy Lu <lulu@redhat.com> Signed-off-by: David Hildenbrand <david@redhat.com> Message-Id: <20211027130324.59791-1-david@redhat.com> Reviewed-by: Michael S. Tsirkin <mst@redhat.com> Signed-off-by: Michael S. Tsirkin <mst@redhat.com> Reviewed-by: Stefano Garzarella <sgarzare@redhat.com>
Diffstat (limited to 'python/qemu/machine/machine.py')
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