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| author | Steve Sistare <steven.sistare@oracle.com> | 2024-02-22 09:28:38 -0800 |
|---|---|---|
| committer | Cédric Le Goater <clg@redhat.com> | 2024-03-08 22:10:13 +0100 |
| commit | 0cb51c183a91e882b10ead4ddf2321296a537c47 (patch) | |
| tree | 8f82a28bb1786ccfd0d1e6f8d2a116e69149c026 /hw/vfio | |
| parent | d9fa4223b30ab881cc2f506fda1fc6a86aad5529 (diff) | |
| download | qemu-0cb51c183a91e882b10ead4ddf2321296a537c47.zip qemu-0cb51c183a91e882b10ead4ddf2321296a537c47.tar.gz qemu-0cb51c183a91e882b10ead4ddf2321296a537c47.tar.bz2 | |
vfio: allow cpr-reboot migration if suspended
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.
Relax the vfio blocker so it does not apply to cpr, and add a notifier that
verifies the guest is suspended.
Signed-off-by: Steve Sistare <steven.sistare@oracle.com>
Reviewed-by: Cédric Le Goater <clg@redhat.com>
Diffstat (limited to 'hw/vfio')
| -rw-r--r-- | hw/vfio/common.c | 2 | ||||
| -rw-r--r-- | hw/vfio/cpr.c | 20 | ||||
| -rw-r--r-- | hw/vfio/migration.c | 2 |
3 files changed, 22 insertions, 2 deletions
diff --git a/hw/vfio/common.c b/hw/vfio/common.c index 059bfdc..ff88c3f 100644 --- a/hw/vfio/common.c +++ b/hw/vfio/common.c @@ -128,7 +128,7 @@ int vfio_block_multiple_devices_migration(VFIODevice *vbasedev, Error **errp) error_setg(&multiple_devices_migration_blocker, "Multiple VFIO devices migration is supported only if all of " "them support P2P migration"); - ret = migrate_add_blocker(&multiple_devices_migration_blocker, errp); + ret = migrate_add_blocker_normal(&multiple_devices_migration_blocker, errp); return ret; } diff --git a/hw/vfio/cpr.c b/hw/vfio/cpr.c index 3bede54..392c2dd 100644 --- a/hw/vfio/cpr.c +++ b/hw/vfio/cpr.c @@ -7,13 +7,33 @@ #include "qemu/osdep.h" #include "hw/vfio/vfio-common.h" +#include "migration/misc.h" #include "qapi/error.h" +#include "sysemu/runstate.h" + +static int vfio_cpr_reboot_notifier(NotifierWithReturn *notifier, + MigrationEvent *e, Error **errp) +{ + if (e->type == MIG_EVENT_PRECOPY_SETUP && + !runstate_check(RUN_STATE_SUSPENDED) && !vm_get_suspended()) { + + error_setg(errp, + "VFIO device only supports cpr-reboot for runstate suspended"); + + return -1; + } + return 0; +} int vfio_cpr_register_container(VFIOContainerBase *bcontainer, Error **errp) { + migration_add_notifier_mode(&bcontainer->cpr_reboot_notifier, + vfio_cpr_reboot_notifier, + MIG_MODE_CPR_REBOOT); return 0; } void vfio_cpr_unregister_container(VFIOContainerBase *bcontainer) { + migration_remove_notifier(&bcontainer->cpr_reboot_notifier); } diff --git a/hw/vfio/migration.c b/hw/vfio/migration.c index 50140ed..2050ac8 100644 --- a/hw/vfio/migration.c +++ b/hw/vfio/migration.c @@ -889,7 +889,7 @@ static int vfio_block_migration(VFIODevice *vbasedev, Error *err, Error **errp) vbasedev->migration_blocker = error_copy(err); error_free(err); - return migrate_add_blocker(&vbasedev->migration_blocker, errp); + return migrate_add_blocker_normal(&vbasedev->migration_blocker, errp); } /* ---------------------------------------------------------------------- */ |