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| author | Steve Sistare <steven.sistare@oracle.com> | 2025-06-10 08:39:15 -0700 |
|---|---|---|
| committer | Cédric Le Goater <clg@redhat.com> | 2025-06-11 14:01:58 +0200 |
| commit | 081c09dc52bab0facfdd1d34fd466479af6ac531 (patch) | |
| tree | 5d7ece58e8798c3bce55db52a91070a3c25acc5d | |
| parent | f95fd60ac164a75c586ce29ebcc94bb6df85b52a (diff) | |
| download | qemu-081c09dc52bab0facfdd1d34fd466479af6ac531.zip qemu-081c09dc52bab0facfdd1d34fd466479af6ac531.tar.gz qemu-081c09dc52bab0facfdd1d34fd466479af6ac531.tar.bz2 | |
migration: lower handler priority
Define a vmstate priority that is lower than the default, so its handlers
run after all default priority handlers. Since 0 is no longer the default
priority, translate an uninitialized priority of 0 to MIG_PRI_DEFAULT.
CPR for vfio will use this to install handlers for containers that run
after handlers for the devices that they contain.
Signed-off-by: Steve Sistare <steven.sistare@oracle.com>
Reviewed-by: Fabiano Rosas <farosas@suse.de>
Reviewed-by: Peter Xu <peterx@redhat.com>
Link: https://lore.kernel.org/qemu-devel/1749569991-25171-3-git-send-email-steven.sistare@oracle.com
Signed-off-by: Cédric Le Goater <clg@redhat.com>
| -rw-r--r-- | include/migration/vmstate.h | 6 | ||||
| -rw-r--r-- | migration/savevm.c | 4 |
2 files changed, 7 insertions, 3 deletions
diff --git a/include/migration/vmstate.h b/include/migration/vmstate.h index a1dfab4..1ff7bd9 100644 --- a/include/migration/vmstate.h +++ b/include/migration/vmstate.h @@ -155,7 +155,11 @@ enum VMStateFlags { }; typedef enum { - MIG_PRI_DEFAULT = 0, + MIG_PRI_UNINITIALIZED = 0, /* An uninitialized priority field maps to */ + /* MIG_PRI_DEFAULT in save_state_priority */ + + MIG_PRI_LOW, /* Must happen after default */ + MIG_PRI_DEFAULT, MIG_PRI_IOMMU, /* Must happen before PCI devices */ MIG_PRI_PCI_BUS, /* Must happen before IOMMU */ MIG_PRI_VIRTIO_MEM, /* Must happen before IOMMU */ diff --git a/migration/savevm.c b/migration/savevm.c index 52105dd..bb04a45 100644 --- a/migration/savevm.c +++ b/migration/savevm.c @@ -266,7 +266,7 @@ typedef struct SaveState { static SaveState savevm_state = { .handlers = QTAILQ_HEAD_INITIALIZER(savevm_state.handlers), - .handler_pri_head = { [MIG_PRI_DEFAULT ... MIG_PRI_MAX] = NULL }, + .handler_pri_head = { [0 ... MIG_PRI_MAX] = NULL }, .global_section_id = 0, }; @@ -737,7 +737,7 @@ static int calculate_compat_instance_id(const char *idstr) static inline MigrationPriority save_state_priority(SaveStateEntry *se) { - if (se->vmsd) { + if (se->vmsd && se->vmsd->priority) { return se->vmsd->priority; } return MIG_PRI_DEFAULT; |