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[Qemu-devel] [RFC PATCH 1/5] suspend: add infrastructure
From: |
Gerd Hoffmann |
Subject: |
[Qemu-devel] [RFC PATCH 1/5] suspend: add infrastructure |
Date: |
Wed, 11 Jan 2012 16:08:57 +0100 |
This patch adds qemu_system_suspend_request() and void
qemu_system_wakeup_request() functions to qemu.
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.
Signed-off-by: Gerd Hoffmann <address@hidden>
---
sysemu.h | 2 ++
vl.c | 21 +++++++++++++++++++++
2 files changed, 23 insertions(+), 0 deletions(-)
diff --git a/sysemu.h b/sysemu.h
index 3806901..d1834a0 100644
--- a/sysemu.h
+++ b/sysemu.h
@@ -39,6 +39,8 @@ void vm_stop(RunState state);
void vm_stop_force_state(RunState state);
void qemu_system_reset_request(void);
+void qemu_system_suspend_request(qemu_irq wake_irq);
+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 ba55b35..26413e3 100644
--- a/vl.c
+++ b/vl.c
@@ -1282,6 +1282,7 @@ static int shutdown_requested, shutdown_signal = -1;
static pid_t shutdown_pid;
static int powerdown_requested;
static int debug_requested;
+static qemu_irq suspend_wake_irq;
static RunState vmstop_requested = RUN_STATE_MAX;
int qemu_shutdown_requested_get(void)
@@ -1397,6 +1398,26 @@ void qemu_system_reset_request(void)
qemu_notify_event();
}
+void qemu_system_suspend_request(qemu_irq wake_irq)
+{
+ if (suspend_wake_irq != NULL) {
+ return;
+ }
+ cpu_stop_current();
+ qemu_notify_event();
+ suspend_wake_irq = wake_irq;
+}
+
+void qemu_system_wakeup_request(void)
+{
+ if (suspend_wake_irq == NULL) {
+ return;
+ }
+ reset_requested = 1;
+ qemu_irq_raise(suspend_wake_irq);
+ suspend_wake_irq = NULL;
+}
+
void qemu_system_killed(int signal, pid_t pid)
{
shutdown_signal = signal;
--
1.7.1