Allow cpr-reboot for vfio if the guest is in the suspended runstate. The guest drivers' suspend methods flush outstanding requests and re-initialize the devices, and thus there is no device state to save and restore. The user is responsible for suspending the guest before initiating cpr, such as by issuing guest-suspend-ram to the qemu guest agent.
Most of the patches in this series enhance migration notifiers so they can return an error status and message. The last two patches register a notifier for vfio that returns an error if the guest is not suspended. Steve Sistare (11): notify: pass error to notifier with return migration: remove error from notifier data migration: convert to NotifierWithReturn migration: remove migration_in_postcopy parameter migration: MigrationEvent for notifiers migration: MigrationNotifyFunc migration: per-mode notifiers migration: refactor migrate_fd_connect failures migration: notifier error checking vfio: register container for cpr vfio: allow cpr-reboot migration if suspended hw/net/virtio-net.c | 14 ++--- hw/vfio/common.c | 2 +- hw/vfio/container.c | 11 +++- hw/vfio/cpr.c | 39 ++++++++++++++ hw/vfio/meson.build | 1 + hw/vfio/migration.c | 13 +++-- hw/virtio/vhost-user.c | 10 ++-- hw/virtio/virtio-balloon.c | 3 +- include/hw/vfio/vfio-common.h | 6 ++- include/hw/virtio/virtio-net.h | 2 +- include/migration/misc.h | 21 +++++--- include/qemu/notify.h | 7 ++- migration/migration.c | 117 +++++++++++++++++++++++++++-------------- migration/postcopy-ram.c | 3 +- migration/postcopy-ram.h | 1 - migration/ram.c | 12 ++--- net/vhost-vdpa.c | 15 +++--- ui/spice-core.c | 19 +++---- util/notify.c | 5 +- 19 files changed, 206 insertions(+), 95 deletions(-) create mode 100644 hw/vfio/cpr.c -- 1.8.3.1
