From patchwork Wed Feb 8 11:00:14 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Gerd Hoffmann X-Patchwork-Id: 140116 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from lists.gnu.org (lists.gnu.org [140.186.70.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (Client did not present a certificate) by ozlabs.org (Postfix) with ESMTPS id 215DBB71B7 for ; Wed, 8 Feb 2012 22:01:11 +1100 (EST) Received: from localhost ([::1]:35832 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Rv5Gl-0004lX-Ct for incoming@patchwork.ozlabs.org; Wed, 08 Feb 2012 06:00:59 -0500 Received: from eggs.gnu.org ([140.186.70.92]:40187) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Rv5GO-0004Sw-DH for qemu-devel@nongnu.org; Wed, 08 Feb 2012 06:00:44 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1Rv5GD-0007nY-Pw for qemu-devel@nongnu.org; Wed, 08 Feb 2012 06:00:36 -0500 Received: from mx1.redhat.com ([209.132.183.28]:47903) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1Rv5GD-0007n8-J2 for qemu-devel@nongnu.org; Wed, 08 Feb 2012 06:00:25 -0500 Received: from int-mx09.intmail.prod.int.phx2.redhat.com (int-mx09.intmail.prod.int.phx2.redhat.com [10.5.11.22]) by mx1.redhat.com (8.14.4/8.14.4) with ESMTP id q18B0MMI025254 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=OK); Wed, 8 Feb 2012 06:00:22 -0500 Received: from rincewind.home.kraxel.org (ovpn-116-33.ams2.redhat.com [10.36.116.33]) by int-mx09.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id q18B0KOk017770; Wed, 8 Feb 2012 06:00:21 -0500 Received: by rincewind.home.kraxel.org (Postfix, from userid 500) id CE1AE41536; Wed, 8 Feb 2012 12:00:19 +0100 (CET) From: Gerd Hoffmann To: qemu-devel@nongnu.org Date: Wed, 8 Feb 2012 12:00:14 +0100 Message-Id: <1328698819-31269-2-git-send-email-kraxel@redhat.com> In-Reply-To: <1328698819-31269-1-git-send-email-kraxel@redhat.com> References: <1328698819-31269-1-git-send-email-kraxel@redhat.com> X-Scanned-By: MIMEDefang 2.68 on 10.5.11.22 X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 209.132.183.28 Cc: xen-devel@lists.xensource.com, Gerd Hoffmann Subject: [Qemu-devel] [PATCH v3 1/6] suspend: add infrastructure X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org 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 --- 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;