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postcopy: Add notifier chain

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Add a notifier chain for postcopy with a 'reason' flag
and an opportunity for a notifier member to return an error.

Call it when enabling postcopy.

This will initially used to enable devices to declare they're unable
to postcopy and later to notify of devices of stages within postcopy.

Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Reviewed-by: Peter Xu <peterx@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Signed-off-by: Michael S. Tsirkin <mst@redhat.com>
This commit is contained in:
Dr. David Alan Gilbert 2018-03-12 17:20:59 +00:00 • committed by Michael S. Tsirkin
parent 2ce16640b4
commit 1693c64c27
3 changed files with 64 additions and 0 deletions
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2
vl.c
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@ -94,6 +94,7 @@ int main(int argc, char **argv)
#include "audio/audio.h"
#include "sysemu/cpus.h"
#include "migration/colo.h"
#include "migration/postcopy-ram.h"
#include "sysemu/kvm.h"
#include "sysemu/hax.h"
#include "qapi/qobject-input-visitor.h"
@ -3101,6 +3102,7 @@ int main(int argc, char **argv, char **envp)
module_call_init(MODULE_INIT_OPTS);
runstate_init();
postcopy_infrastructure_init();
if (qcrypto_init(&err) < 0) {
error_reportf_err(err, "cannot initialize crypto: ");