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authorClaudio Imbrenda <imbrenda@linux.vnet.ibm.com>2017-02-14 18:07:47 +0100
committerPaolo Bonzini <pbonzini@redhat.com>2017-02-16 14:06:55 +0100
commit2d76e82395979b44e055b69b7e453f43c5c060cf (patch)
treefa8b2c6cfa594adb65eae796543c2c84a8aa8819
parent1c64fdbc8177058802df205f5d7cd65edafa59a8 (diff)
downloadqemu-arm-2d76e82395979b44e055b69b7e453f43c5c060cf.tar.gz
move vm_start to cpus.c
This patch: * moves vm_start to cpus.c. * exports qemu_vmstop_requested, since it's needed by vm_start. * extracts vm_prepare_start from vm_start; it does what vm_start did, except restarting the cpus. * vm_start now calls vm_prepare_start and then restarts the cpus. Signed-off-by: Claudio Imbrenda <imbrenda@linux.vnet.ibm.com> Message-Id: <1487092068-16562-2-git-send-email-imbrenda@linux.vnet.ibm.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>
-rw-r--r--cpus.c42
-rw-r--r--include/sysemu/sysemu.h2
-rw-r--r--vl.c30
3 files changed, 45 insertions, 29 deletions
diff --git a/cpus.c b/cpus.c
index 71a82e5004..0bcb5b50b6 100644
--- a/cpus.c
+++ b/cpus.c
@@ -1578,6 +1578,48 @@ int vm_stop(RunState state)
return do_vm_stop(state);
}
+/**
+ * Prepare for (re)starting the VM.
+ * Returns -1 if the vCPUs are not to be restarted (e.g. if they are already
+ * running or in case of an error condition), 0 otherwise.
+ */
+int vm_prepare_start(void)
+{
+ RunState requested;
+ int res = 0;
+
+ qemu_vmstop_requested(&requested);
+ if (runstate_is_running() && requested == RUN_STATE__MAX) {
+ return -1;
+ }
+
+ /* Ensure that a STOP/RESUME pair of events is emitted if a
+ * vmstop request was pending. The BLOCK_IO_ERROR event, for
+ * example, according to documentation is always followed by
+ * the STOP event.
+ */
+ if (runstate_is_running()) {
+ qapi_event_send_stop(&error_abort);
+ res = -1;
+ } else {
+ replay_enable_events();
+ cpu_enable_ticks();
+ runstate_set(RUN_STATE_RUNNING);
+ vm_state_notify(1, RUN_STATE_RUNNING);
+ }
+
+ /* We are sending this now, but the CPUs will be resumed shortly later */
+ qapi_event_send_resume(&error_abort);
+ return res;
+}
+
+void vm_start(void)
+{
+ if (!vm_prepare_start()) {
+ resume_all_vcpus();
+ }
+}
+
/* does a state transition even if the VM is already stopped,
current state is forgotten forever */
int vm_stop_force_state(RunState state)
diff --git a/include/sysemu/sysemu.h b/include/sysemu/sysemu.h
index 4d50694930..eda5241d38 100644
--- a/include/sysemu/sysemu.h
+++ b/include/sysemu/sysemu.h
@@ -37,6 +37,7 @@ void vm_state_notify(int running, RunState state);
#define VMRESET_REPORT true
void vm_start(void);
+int vm_prepare_start(void);
int vm_stop(RunState state);
int vm_stop_force_state(RunState state);
@@ -60,6 +61,7 @@ void qemu_register_powerdown_notifier(Notifier *notifier);
void qemu_system_debug_request(void);
void qemu_system_vmstop_request(RunState reason);
void qemu_system_vmstop_request_prepare(void);
+bool qemu_vmstop_requested(RunState *r);
int qemu_shutdown_requested_get(void);
int qemu_reset_requested_get(void);
void qemu_system_killed(int signal, pid_t pid);
diff --git a/vl.c b/vl.c
index b4eaf03734..0d866adce6 100644
--- a/vl.c
+++ b/vl.c
@@ -724,7 +724,7 @@ StatusInfo *qmp_query_status(Error **errp)
return info;
}
-static bool qemu_vmstop_requested(RunState *r)
+bool qemu_vmstop_requested(RunState *r)
{
qemu_mutex_lock(&vmstop_lock);
*r = vmstop_requested;
@@ -745,34 +745,6 @@ void qemu_system_vmstop_request(RunState state)
qemu_notify_event();
}
-void vm_start(void)
-{
- RunState requested;
-
- qemu_vmstop_requested(&requested);
- if (runstate_is_running() && requested == RUN_STATE__MAX) {
- return;
- }
-
- /* Ensure that a STOP/RESUME pair of events is emitted if a
- * vmstop request was pending. The BLOCK_IO_ERROR event, for
- * example, according to documentation is always followed by
- * the STOP event.
- */
- if (runstate_is_running()) {
- qapi_event_send_stop(&error_abort);
- } else {
- replay_enable_events();
- cpu_enable_ticks();
- runstate_set(RUN_STATE_RUNNING);
- vm_state_notify(1, RUN_STATE_RUNNING);
- resume_all_vcpus();
- }
-
- qapi_event_send_resume(&error_abort);
-}
-
-
/***********************************************************/
/* real time host monotonic timer */