From patchwork Thu Mar 21 09:13:35 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hu Tao X-Patchwork-Id: 229592 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (Client did not present a certificate) by ozlabs.org (Postfix) with ESMTPS id A27502C007C for ; Thu, 21 Mar 2013 20:14:39 +1100 (EST) Received: from localhost ([::1]:41988 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1UIba0-0005PU-VF for incoming@patchwork.ozlabs.org; Thu, 21 Mar 2013 05:14:36 -0400 Received: from eggs.gnu.org ([208.118.235.92]:32775) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1UIbZ8-0004Zl-C5 for qemu-devel@nongnu.org; Thu, 21 Mar 2013 05:13:47 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1UIbZ0-0007DR-B0 for qemu-devel@nongnu.org; Thu, 21 Mar 2013 05:13:42 -0400 Received: from [222.73.24.84] (port=39849 helo=song.cn.fujitsu.com) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1UIbYz-0007DD-Ow for qemu-devel@nongnu.org; Thu, 21 Mar 2013 05:13:34 -0400 X-IronPort-AV: E=Sophos;i="4.84,884,1355068800"; d="scan'208";a="6917120" Received: from unknown (HELO tang.cn.fujitsu.com) ([10.167.250.3]) by song.cn.fujitsu.com with ESMTP; 21 Mar 2013 17:11:02 +0800 Received: from fnstmail02.fnst.cn.fujitsu.com (tang.cn.fujitsu.com [127.0.0.1]) by tang.cn.fujitsu.com (8.14.3/8.13.1) with ESMTP id r2L9DT4q007936; Thu, 21 Mar 2013 17:13:29 +0800 Received: from localhost.localdomain ([10.167.233.156]) by fnstmail02.fnst.cn.fujitsu.com (Lotus Domino Release 8.5.3) with ESMTP id 2013032117120148-1042572 ; Thu, 21 Mar 2013 17:12:01 +0800 From: Hu Tao To: Matthew Garrett , linux-kernel@vger.kernel.org, platform-driver-x86@vger.kernel.org, qemu-devel , "Daniel P. Berrange" , KAMEZAWA Hiroyuki , Jan Kiszka , Gleb Natapov , Blue Swirl , Eric Blake , Andrew Jones , Marcelo Tosatti , Sasha Levin , Luiz Capitulino , Anthony Liguori , Markus Armbruster , Paolo Bonzini , Stefan Hajnoczi , Juan Quintela , Orit Wasserman , Wen Congyang , "Michael S. Tsirkin" , Alexander Graf , Alex Williamson , Peter Maydell , Christian Borntraeger Date: Thu, 21 Mar 2013 17:13:35 +0800 Message-Id: <1363857215-23783-1-git-send-email-hutao@cn.fujitsu.com> X-Mailer: git-send-email 1.8.1.4 In-Reply-To: References: X-MIMETrack: Itemize by SMTP Server on mailserver/fnst(Release 8.5.3|September 15, 2011) at 2013/03/21 17:12:01, Serialize by Router on mailserver/fnst(Release 8.5.3|September 15, 2011) at 2013/03/21 17:12:04, Serialize complete at 2013/03/21 17:12:04 X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 222.73.24.84 Subject: [Qemu-devel] [PATCH v15] pvpanic: pvpanic device driver 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 pvpanic device is a qemu simulated device through which guest panic event is sent to host. Signed-off-by: Hu Tao --- ref: http://lists.nongnu.org/archive/html/qemu-devel/2013-03/msg03630.html The version number is 15 to consist with qemu patches. drivers/platform/x86/Kconfig | 7 +++ drivers/platform/x86/Makefile | 2 + drivers/platform/x86/pvpanic.c | 115 +++++++++++++++++++++++++++++++++++++++++ 3 files changed, 124 insertions(+) create mode 100644 drivers/platform/x86/pvpanic.c diff --git a/drivers/platform/x86/Kconfig b/drivers/platform/x86/Kconfig index 7ab0b2f..c72598e 100644 --- a/drivers/platform/x86/Kconfig +++ b/drivers/platform/x86/Kconfig @@ -768,4 +768,11 @@ config APPLE_GMUX graphics as well as the backlight. Currently only backlight control is supported by the driver. +config PVPANIC + tristate "pvpanic device support" + depends on ACPI + ---help--- + This driver provides support for pvpanic device, which is a qemu + simulated device through which guest panic event is sent to host. + endif # X86_PLATFORM_DEVICES diff --git a/drivers/platform/x86/Makefile b/drivers/platform/x86/Makefile index bf7e4f9..b52f1c4 100644 --- a/drivers/platform/x86/Makefile +++ b/drivers/platform/x86/Makefile @@ -50,3 +50,5 @@ obj-$(CONFIG_INTEL_MID_POWER_BUTTON) += intel_mid_powerbtn.o obj-$(CONFIG_INTEL_OAKTRAIL) += intel_oaktrail.o obj-$(CONFIG_SAMSUNG_Q10) += samsung-q10.o obj-$(CONFIG_APPLE_GMUX) += apple-gmux.o + +obj-$(CONFIG_PVPANIC) += pvpanic.o diff --git a/drivers/platform/x86/pvpanic.c b/drivers/platform/x86/pvpanic.c new file mode 100644 index 0000000..e6ea595 --- /dev/null +++ b/drivers/platform/x86/pvpanic.c @@ -0,0 +1,115 @@ +/* + * pvpanic.c - pvpanic Device Support + * + * Copyright (C) 2013 Fujitsu. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation; either version 2 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program; if not, write to the Free Software + * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA + */ + +#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt + +#include +#include +#include +#include +#include +#include + +MODULE_AUTHOR("Hu Tao "); +MODULE_DESCRIPTION("pvpanic device driver"); +MODULE_LICENSE("GPL"); + +static int pvpanic_add(struct acpi_device *device); +static int pvpanic_remove(struct acpi_device *device); + +static const struct acpi_device_id pvpanic_device_ids[] = { + { "QEMU0001", 0}, + { "", 0}, +}; +MODULE_DEVICE_TABLE(acpi, pvpanic_device_ids); + +#define PVPANIC_PANICKED (1 << 0) + +static acpi_handle handle; + +static struct acpi_driver pvpanic_driver = { + .name = "pvpanic", + .class = "QEMU", + .ids = pvpanic_device_ids, + .ops = { + .add = pvpanic_add, + .remove = pvpanic_remove, + }, + .owner = THIS_MODULE, +}; + +static void +pvpanic_send_event(unsigned int event) +{ + union acpi_object arg; + struct acpi_object_list arg_list; + + if (!handle) + return; + + arg.type = ACPI_TYPE_INTEGER; + arg.integer.value = event; + + arg_list.count = 1; + arg_list.pointer = &arg; + + acpi_evaluate_object(handle, "WRPT", &arg_list, NULL); +} + +static int +pvpanic_panic_notify(struct notifier_block *nb, unsigned long code, + void *unused) +{ + pvpanic_send_event(PVPANIC_PANICKED); + return NOTIFY_DONE; +} + +static struct notifier_block pvpanic_panic_nb = { + .notifier_call = pvpanic_panic_notify, +}; + +static int pvpanic_add(struct acpi_device *device) +{ + acpi_status status; + u64 ret; + + status = acpi_evaluate_integer(device->handle, "_STA", NULL, + &ret); + + if (ACPI_FAILURE(status) || !ret) + return -ENODEV; + + handle = device->handle; + atomic_notifier_chain_register(&panic_notifier_list, + &pvpanic_panic_nb); + + return 0; +} + +static int pvpanic_remove(struct acpi_device *device) +{ + + atomic_notifier_chain_unregister(&panic_notifier_list, + &pvpanic_panic_nb); + handle = NULL; + return 0; +} + +module_acpi_driver(pvpanic_driver);