From patchwork Wed Mar 7 01:53:44 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Wen Congyang X-Patchwork-Id: 145137 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 25A78B6FA1 for ; Wed, 7 Mar 2012 12:52:17 +1100 (EST) Received: from localhost ([::1]:57658 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1S5635-00031u-4A for incoming@patchwork.ozlabs.org; Tue, 06 Mar 2012 20:52:15 -0500 Received: from eggs.gnu.org ([208.118.235.92]:44443) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1S562y-00031p-5R for qemu-devel@nongnu.org; Tue, 06 Mar 2012 20:52:09 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1S562v-0005OO-Se for qemu-devel@nongnu.org; Tue, 06 Mar 2012 20:52:07 -0500 Received: from [222.73.24.84] (port=61542 helo=song.cn.fujitsu.com) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1S562v-0005OF-H8 for qemu-devel@nongnu.org; Tue, 06 Mar 2012 20:52:05 -0500 X-IronPort-AV: E=Sophos;i="4.73,542,1325433600"; d="scan'208";a="4474578" Received: from unknown (HELO tang.cn.fujitsu.com) ([10.167.250.3]) by song.cn.fujitsu.com with ESMTP; 07 Mar 2012 09:51:58 +0800 Received: from mailserver.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 q271q0OI008249; Wed, 7 Mar 2012 09:52:01 +0800 Received: from [10.167.225.226] ([10.167.225.226]) by mailserver.fnst.cn.fujitsu.com (Lotus Domino Release 8.5.1FP4) with ESMTP id 2012030709500592-902340 ; Wed, 7 Mar 2012 09:50:05 +0800 Message-ID: <4F56BFA8.10300@cn.fujitsu.com> Date: Wed, 07 Mar 2012 09:53:44 +0800 From: Wen Congyang User-Agent: Mozilla/5.0 (X11; U; Linux x86_64; en-US; rv:1.9.1.9) Gecko/20100413 Fedora/3.0.4-2.fc13 Thunderbird/3.0.4 MIME-Version: 1.0 To: kvm list , qemu-devel , "linux-kernel@vger.kernel.org" , Avi Kivity , "Daniel P. Berrange" , KAMEZAWA Hiroyuki , Jan Kiszka , Gleb Natapov References: <4F56BEF2.4020405@cn.fujitsu.com> In-Reply-To: <4F56BEF2.4020405@cn.fujitsu.com> X-MIMETrack: Itemize by SMTP Server on mailserver/fnst(Release 8.5.1FP4|July 25, 2010) at 2012-03-07 09:50:05, Serialize by Router on mailserver/fnst(Release 8.5.1FP4|July 25, 2010) at 2012-03-07 09:50:08, Serialize complete at 2012-03-07 09:50:08 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 1/2 v2] kvm: notify host when guest paniced 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 The implementation is the same as xen: register panic notifier, and call hypercall when the guest is paniced. Signed-off-by: Wen Congyang --- arch/x86/kernel/kvm.c | 12 ++++++++++++ include/linux/kvm_para.h | 1 + 2 files changed, 13 insertions(+), 0 deletions(-) diff --git a/arch/x86/kernel/kvm.c b/arch/x86/kernel/kvm.c index f0c6fd6..7f9afc5 100644 --- a/arch/x86/kernel/kvm.c +++ b/arch/x86/kernel/kvm.c @@ -331,6 +331,17 @@ static struct notifier_block kvm_pv_reboot_nb = { .notifier_call = kvm_pv_reboot_notify, }; +static int +kvm_pv_panic_notify(struct notifier_block *nb, unsigned long code, void *unused) +{ + kvm_hypercall0(KVM_HC_GUEST_PANICED); + return NOTIFY_DONE; +} + +static struct notifier_block kvm_pv_panic_nb = { + .notifier_call = kvm_pv_panic_notify, +}; + static u64 kvm_steal_clock(int cpu) { u64 steal; @@ -417,6 +428,7 @@ void __init kvm_guest_init(void) paravirt_ops_setup(); register_reboot_notifier(&kvm_pv_reboot_nb); + atomic_notifier_chain_register(&panic_notifier_list, &kvm_pv_panic_nb); for (i = 0; i < KVM_TASK_SLEEP_HASHSIZE; i++) spin_lock_init(&async_pf_sleepers[i].lock); if (kvm_para_has_feature(KVM_FEATURE_ASYNC_PF)) diff --git a/include/linux/kvm_para.h b/include/linux/kvm_para.h index ff476dd..d030a22 100644 --- a/include/linux/kvm_para.h +++ b/include/linux/kvm_para.h @@ -19,6 +19,7 @@ #define KVM_HC_MMU_OP 2 #define KVM_HC_FEATURES 3 #define KVM_HC_PPC_MAP_MAGIC_PAGE 4 +#define KVM_HC_GUEST_PANICED 5 /* * hypercalls use architecture specific