global_state: Make section optional
This section would be sent:
a- for all new machine types
b- for old machine types if section state is different form {running,paused}
that were the only giving us troubles.
So, in new qemus: it is alwasy there. In old qemus: they are only
there if it an error has happened, basically stoping on target.
Signed-off-by: Juan Quintela <quintela@redhat.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
diff --git a/hw/i386/pc_piix.c b/hw/i386/pc_piix.c
index 56cdcb9..3ee3b47 100644
--- a/hw/i386/pc_piix.c
+++ b/hw/i386/pc_piix.c
@@ -312,6 +312,7 @@
if (kvm_enabled()) {
pcms->smm = ON_OFF_AUTO_OFF;
}
+ global_state_set_optional();
}
static void pc_compat_2_2(MachineState *machine)
diff --git a/hw/i386/pc_q35.c b/hw/i386/pc_q35.c
index 8aa3a67..0dc4ab1 100644
--- a/hw/i386/pc_q35.c
+++ b/hw/i386/pc_q35.c
@@ -295,6 +295,7 @@
if (kvm_enabled()) {
pcms->smm = ON_OFF_AUTO_OFF;
}
+ global_state_set_optional();
}
static void pc_compat_2_2(MachineState *machine)
diff --git a/hw/ppc/spapr.c b/hw/ppc/spapr.c
index 01f8da8..bcf5f0f 100644
--- a/hw/ppc/spapr.c
+++ b/hw/ppc/spapr.c
@@ -1853,6 +1853,7 @@
static void spapr_compat_2_3(Object *obj)
{
savevm_skip_section_footers();
+ global_state_set_optional();
}
static void spapr_compat_2_2(Object *obj)
diff --git a/include/migration/migration.h b/include/migration/migration.h
index 86df6cc..f153eba 100644
--- a/include/migration/migration.h
+++ b/include/migration/migration.h
@@ -198,4 +198,5 @@
void ram_mig_init(void);
void savevm_skip_section_footers(void);
void register_global_state(void);
+void global_state_set_optional(void);
#endif
diff --git a/migration/migration.c b/migration/migration.c
index 5e436f7..edb4f3e 100644
--- a/migration/migration.c
+++ b/migration/migration.c
@@ -100,6 +100,7 @@
typedef struct {
+ bool optional;
uint32_t size;
uint8_t runstate[100];
} GlobalState;
@@ -122,6 +123,33 @@
return (char *)global_state.runstate;
}
+void global_state_set_optional(void)
+{
+ global_state.optional = true;
+}
+
+static bool global_state_needed(void *opaque)
+{
+ GlobalState *s = opaque;
+ char *runstate = (char *)s->runstate;
+
+ /* If it is not optional, it is mandatory */
+
+ if (s->optional == false) {
+ return true;
+ }
+
+ /* If state is running or paused, it is not needed */
+
+ if (strcmp(runstate, "running") == 0 ||
+ strcmp(runstate, "paused") == 0) {
+ return false;
+ }
+
+ /* for any other state it is needed */
+ return true;
+}
+
static int global_state_post_load(void *opaque, int version_id)
{
GlobalState *s = opaque;
@@ -161,6 +189,7 @@
.minimum_version_id = 1,
.post_load = global_state_post_load,
.pre_save = global_state_pre_save,
+ .needed = global_state_needed,
.fields = (VMStateField[]) {
VMSTATE_UINT32(size, GlobalState),
VMSTATE_BUFFER(runstate, GlobalState),
