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migration/ram.c: add a notifier chain for precopy

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This patch adds a notifier chain for the memory precopy. This enables various
precopy optimizations to be invoked at specific places.

Signed-off-by: Wei Wang <wei.w.wang@intel.com>
CC: Dr. David Alan Gilbert <dgilbert@redhat.com>
CC: Juan Quintela <quintela@redhat.com>
CC: Michael S. Tsirkin <mst@redhat.com>
CC: Peter Xu <peterx@redhat.com>
Reviewed-by: Peter Xu <peterx@redhat.com>
Message-Id: <1544516693-5395-6-git-send-email-wei.w.wang@intel.com>
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
This commit is contained in:
Wei Wang
2019-03-06 10:49:18 +00:00
committed by Dr. David Alan Gilbert
parent 6bcb05fc42
commit bd2270608f
4 changed files with 83 additions and 3 deletions
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include/migration/misc.h
+19
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@@ -20,6 +20,25 @@
/* migration/ram.c */
typedef enum PrecopyNotifyReason {
PRECOPY_NOTIFY_SETUP = 0,
PRECOPY_NOTIFY_BEFORE_BITMAP_SYNC = 1,
PRECOPY_NOTIFY_AFTER_BITMAP_SYNC = 2,
PRECOPY_NOTIFY_COMPLETE = 3,
PRECOPY_NOTIFY_CLEANUP = 4,
PRECOPY_NOTIFY_MAX = 5,
} PrecopyNotifyReason;
typedef struct PrecopyNotifyData {
enum PrecopyNotifyReason reason;
Error **errp;
} PrecopyNotifyData;
void precopy_infrastructure_init(void);
void precopy_add_notifier(NotifierWithReturn *n);
void precopy_remove_notifier(NotifierWithReturn *n);
int precopy_notify(PrecopyNotifyReason reason, Error **errp);
void ram_mig_init(void);
void qemu_guest_free_page_hint(void *addr, size_t len);