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Re: [Qemu-devel] [PATCH v3 1/6] suspend: add infrastructure
From: |
Gleb Natapov |
Subject: |
Re: [Qemu-devel] [PATCH v3 1/6] suspend: add infrastructure |
Date: |
Thu, 9 Feb 2012 10:48:16 +0200 |
On Wed, Feb 08, 2012 at 12:00:14PM +0100, Gerd Hoffmann wrote:
> 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_system_wakeup_request() should get wakeup source as a parameter.
There are ways to report it to a 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
>
>
--
Gleb.
- [Qemu-devel] [PATCH v3 2/6] suspend: switch acpi s3 to new infrastructure., (continued)
[Qemu-devel] [PATCH v3 1/6] suspend: add infrastructure, Gerd Hoffmann, 2012/02/08
- Re: [Qemu-devel] [PATCH v3 1/6] suspend: add infrastructure,
Gleb Natapov <=
- 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
[Qemu-devel] [PATCH v3 5/6] suspend: make serial ports wakeup the guest., Gerd Hoffmann, 2012/02/08