From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([140.186.70.92]:34909) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1RvXRa-00061O-Uo for qemu-devel@nongnu.org; Thu, 09 Feb 2012 12:06:08 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1RvXRT-0003dV-SN for qemu-devel@nongnu.org; Thu, 09 Feb 2012 12:06:02 -0500 Received: from mx1.redhat.com ([209.132.183.28]:46437) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1RvXRT-0003d0-IC for qemu-devel@nongnu.org; Thu, 09 Feb 2012 12:05:55 -0500 Received: from int-mx12.intmail.prod.int.phx2.redhat.com (int-mx12.intmail.prod.int.phx2.redhat.com [10.5.11.25]) by mx1.redhat.com (8.14.4/8.14.4) with ESMTP id q19H5s3O026660 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK) for ; Thu, 9 Feb 2012 12:05:55 -0500 From: Gerd Hoffmann Date: Thu, 9 Feb 2012 18:05:37 +0100 Message-Id: <1328807143-29499-6-git-send-email-kraxel@redhat.com> In-Reply-To: <1328807143-29499-1-git-send-email-kraxel@redhat.com> References: <1328807143-29499-1-git-send-email-kraxel@redhat.com> Subject: [Qemu-devel] [PATCH v4 05/11] suspend: add infrastructure List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: qemu-devel@nongnu.org Cc: Gerd Hoffmann , gleb@redhat.com 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. * qemu_register_wakeup_notifier can be used to register a notifier which will be called when the guest is woken up. Machine types and device models can hook in there to modify state if needed. * qemu_system_wakeup_enable can be used to enable/disable wakeup events. Signed-off-by: Gerd Hoffmann --- sysemu.h | 9 +++++++++ vl.c | 49 +++++++++++++++++++++++++++++++++++++++++++++++++ 2 files changed, 58 insertions(+), 0 deletions(-) diff --git a/sysemu.h b/sysemu.h index 9d5ce33..af73813 100644 --- a/sysemu.h +++ b/sysemu.h @@ -38,7 +38,16 @@ void vm_start(void); void vm_stop(RunState state); void vm_stop_force_state(RunState state); +typedef enum WakeupReason { + QEMU_WAKEUP_REASON_OTHER = 0, +} WakeupReason; + void qemu_system_reset_request(void); +void qemu_system_suspend_request(void); +void qemu_register_suspend_notifier(Notifier *notifier); +void qemu_system_wakeup_request(WakeupReason reason); +void qemu_system_wakeup_enable(WakeupReason reason, bool enabled); +void qemu_register_wakeup_notifier(Notifier *notifier); 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..5095e06 100644 --- a/vl.c +++ b/vl.c @@ -1283,6 +1283,12 @@ 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 NotifierList wakeup_notifiers = + NOTIFIER_LIST_INITIALIZER(wakeup_notifiers); +static uint32_t wakeup_reason_mask = ~0; static RunState vmstop_requested = RUN_STATE_MAX; int qemu_shutdown_requested_get(void) @@ -1398,6 +1404,49 @@ 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(WakeupReason reason) +{ + if (!is_suspended) { + return; + } + if (!(wakeup_reason_mask & (1 << reason))) { + return; + } + notifier_list_notify(&wakeup_notifiers, &reason); + reset_requested = 1; + qemu_notify_event(); + is_suspended = false; +} + +void qemu_system_wakeup_enable(WakeupReason reason, bool enabled) +{ + if (enabled) { + wakeup_reason_mask |= (1 << reason); + } else { + wakeup_reason_mask &= ~(1 << reason); + } +} + +void qemu_register_wakeup_notifier(Notifier *notifier) +{ + notifier_list_add(&wakeup_notifiers, notifier); +} + void qemu_system_killed(int signal, pid_t pid) { shutdown_signal = signal; -- 1.7.1