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[Qemu-devel] [PATCH 2/5] disk_deadlines: add request to resume Virtual M
From: |
Denis V. Lunev |
Subject: |
[Qemu-devel] [PATCH 2/5] disk_deadlines: add request to resume Virtual Machine |
Date: |
Tue, 8 Sep 2015 11:00:25 +0300 |
From: Raushaniya Maksudova <address@hidden>
In some cases one needs to pause and resume a Virtual Machine from inside
of Qemu. Currently there are request functions to pause VM (vmstop), but
there are no respective ones to resume VM.
Signed-off-by: Raushaniya Maksudova <address@hidden>
Signed-off-by: Denis V. Lunev <address@hidden>
CC: Stefan Hajnoczi <address@hidden>
CC: Kevin Wolf <address@hidden>
CC: Paolo Bonzini <address@hidden>
---
include/sysemu/sysemu.h | 1 +
stubs/vm-stop.c | 5 +++++
vl.c | 18 ++++++++++++++++++
3 files changed, 24 insertions(+)
diff --git a/include/sysemu/sysemu.h b/include/sysemu/sysemu.h
index 44570d1..a382ae1 100644
--- a/include/sysemu/sysemu.h
+++ b/include/sysemu/sysemu.h
@@ -62,6 +62,7 @@ void qemu_system_shutdown_request(void);
void qemu_system_powerdown_request(void);
void qemu_register_powerdown_notifier(Notifier *notifier);
void qemu_system_debug_request(void);
+void qemu_system_vmstart_request(void);
void qemu_system_vmstop_request(RunState reason);
void qemu_system_vmstop_request_prepare(void);
int qemu_shutdown_requested_get(void);
diff --git a/stubs/vm-stop.c b/stubs/vm-stop.c
index 69fd86b..c8e2cdd 100644
--- a/stubs/vm-stop.c
+++ b/stubs/vm-stop.c
@@ -10,3 +10,8 @@ void qemu_system_vmstop_request(RunState state)
{
abort();
}
+
+void qemu_system_vmstart_request(void)
+{
+ abort();
+}
diff --git a/vl.c b/vl.c
index 584ca88..63f10d3 100644
--- a/vl.c
+++ b/vl.c
@@ -563,6 +563,7 @@ static RunState current_run_state = RUN_STATE_PRELAUNCH;
/* We use RUN_STATE_MAX but any invalid value will do */
static RunState vmstop_requested = RUN_STATE_MAX;
static QemuMutex vmstop_lock;
+static bool vmstart_requested;
typedef struct {
RunState from;
@@ -723,6 +724,19 @@ void qemu_system_vmstop_request(RunState state)
qemu_notify_event();
}
+static bool qemu_vmstart_requested(void)
+{
+ bool r = vmstart_requested;
+ vmstart_requested = false;
+ return r;
+}
+
+void qemu_system_vmstart_request(void)
+{
+ vmstart_requested = true;
+ qemu_notify_event();
+}
+
void vm_start(void)
{
RunState requested;
@@ -1884,6 +1898,10 @@ static bool main_loop_should_exit(void)
if (qemu_vmstop_requested(&r)) {
vm_stop(r);
}
+ if (qemu_vmstart_requested()) {
+ vm_start();
+ }
+
return false;
}
--
2.1.4