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[Qemu-devel] [PATCH v3 1/6] suspend: add infrastructure
From: |
Gerd Hoffmann |
Subject: |
[Qemu-devel] [PATCH v3 1/6] suspend: add infrastructure |
Date: |
Wed, 8 Feb 2012 12:00:14 +0100 |
This patch adds some infrastructure to handle suspend and resume to
qemu. First there are two functions to switch state and second there
is a suspend notifier:
* qemu_system_suspend_request() is supposed to be called when the
guest asks for being be suspended, for example via ACPI.
* qemu_system_wakeup_request is supposed to be called on events which
should wake up the guest.
* qemu_register_suspend_notifier can be used to register a notifier
which will be called when the guest is suspended. Machine types
and device models can hook in there to modify state if needed.
Signed-off-by: Gerd Hoffmann <address@hidden>
---
sysemu.h | 3 +++
vl.c | 28 ++++++++++++++++++++++++++++
2 files changed, 31 insertions(+), 0 deletions(-)
diff --git a/sysemu.h b/sysemu.h
index 9d5ce33..3b9d7f5 100644
--- a/sysemu.h
+++ b/sysemu.h
@@ -39,6 +39,9 @@ void vm_stop(RunState state);
void vm_stop_force_state(RunState state);
void qemu_system_reset_request(void);
+void qemu_system_suspend_request(void);
+void qemu_register_suspend_notifier(Notifier *notifier);
+void qemu_system_wakeup_request(void);
void qemu_system_shutdown_request(void);
void qemu_system_powerdown_request(void);
void qemu_system_debug_request(void);
diff --git a/vl.c b/vl.c
index 63dd725..822fd58 100644
--- a/vl.c
+++ b/vl.c
@@ -1283,6 +1283,9 @@ static int shutdown_requested, shutdown_signal = -1;
static pid_t shutdown_pid;
static int powerdown_requested;
static int debug_requested;
+static bool is_suspended;
+static NotifierList suspend_notifiers =
+ NOTIFIER_LIST_INITIALIZER(suspend_notifiers);
static RunState vmstop_requested = RUN_STATE_MAX;
int qemu_shutdown_requested_get(void)
@@ -1398,6 +1401,31 @@ void qemu_system_reset_request(void)
qemu_notify_event();
}
+void qemu_system_suspend_request(void)
+{
+ if (is_suspended) {
+ return;
+ }
+ cpu_stop_current();
+ notifier_list_notify(&suspend_notifiers, NULL);
+ is_suspended = true;
+}
+
+void qemu_register_suspend_notifier(Notifier *notifier)
+{
+ notifier_list_add(&suspend_notifiers, notifier);
+}
+
+void qemu_system_wakeup_request(void)
+{
+ if (!is_suspended) {
+ return;
+ }
+ reset_requested = 1;
+ qemu_notify_event();
+ is_suspended = false;
+}
+
void qemu_system_killed(int signal, pid_t pid)
{
shutdown_signal = signal;
--
1.7.1
- Re: [Qemu-devel] [PATCH v3 6/6] suspend: make rtc alarm wakeup the guest., (continued)
[Qemu-devel] [PATCH v3 1/6] suspend: add infrastructure,
Gerd Hoffmann <=
- Re: [Qemu-devel] [PATCH v3 1/6] suspend: add infrastructure, Gleb Natapov, 2012/02/09
- Re: [Qemu-devel] [PATCH v3 1/6] suspend: add infrastructure, Gerd Hoffmann, 2012/02/09
- Re: [Qemu-devel] [PATCH v3 1/6] suspend: add infrastructure, Gleb Natapov, 2012/02/09
- Re: [Qemu-devel] [PATCH v3 1/6] suspend: add infrastructure, Gerd Hoffmann, 2012/02/09
- Re: [Qemu-devel] [PATCH v3 1/6] suspend: add infrastructure, Gleb Natapov, 2012/02/09
- Re: [Qemu-devel] [PATCH v3 1/6] suspend: add infrastructure, Gerd Hoffmann, 2012/02/09
- Re: [Qemu-devel] [PATCH v3 1/6] suspend: add infrastructure, Gleb Natapov, 2012/02/09
- Re: [Qemu-devel] [PATCH v3 1/6] suspend: add infrastructure, Gerd Hoffmann, 2012/02/09
- Re: [Qemu-devel] [PATCH v3 1/6] suspend: add infrastructure, Gerd Hoffmann, 2012/02/09
- Re: [Qemu-devel] [PATCH v3 1/6] suspend: add infrastructure, Gleb Natapov, 2012/02/09