v2: add helpers to manage the list of hidden devices rather
than relying on the command line parameters
Hide VFIO device if it is plugged before the virtio-net one
This series moves the code used by virtio-net failover from the
virtio-net device to the PCI subsystem.
Doing that, we can use failover with a regular QEMU PCI device
(we can add the function call to unregister the ROM vmstate) and we
can also use this code to unplug a PCI card before migration
and plug it back after migration without using a failover
device (of course, connectivity is lost during all the migration).
In contrary of failover, this does not need support from the
guest system to work.
Laurent Vivier (8):
qdev: add an Error parameter to the DeviceListener hide_device()
function
qdev/qbus: remove failover specific code
failover: virtio-net: remove failover_primary_hidden flag
failover: pci: move failover hotplug/unplug code into pci subsystem
failover: hide the PCI device if the virtio-net device is not present
failover: pci: unregister ROM on unplug
pci: automatically unplug a PCI card before migration
failover: qemu-opts: manage hidden device list
include/hw/pci/pci.h | 5 +
include/hw/qdev-core.h | 6 +-
include/hw/virtio/virtio-net.h | 4 -
include/hw/virtio/virtio.h | 1 -
include/qemu/option.h | 4 +
hw/core/qdev.c | 5 +-
hw/net/virtio-net.c | 149 +-------------------
hw/pci/pci.c | 242 +++++++++++++++++++++++++++++++--
hw/vfio/pci.c | 2 +-
softmmu/qdev-monitor.c | 14 +-
util/qemu-option.c | 82 +++++++++++
11 files changed, 338 insertions(+), 176 deletions(-)
--
2.31.1
