From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from eggs.gnu.org ([208.118.235.92]:47634) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1S5YIH-00074B-Ig for qemu-devel@nongnu.org; Thu, 08 Mar 2012 03:01:55 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1S5YHl-0006Mf-6q for qemu-devel@nongnu.org; Thu, 08 Mar 2012 03:01:49 -0500 Received: from [222.73.24.84] (port=14401 helo=song.cn.fujitsu.com) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1S5YHk-0006MM-S1 for qemu-devel@nongnu.org; Thu, 08 Mar 2012 03:01:17 -0500 Message-ID: <4F5867B2.6090805@cn.fujitsu.com> Date: Thu, 08 Mar 2012 16:02:58 +0800 From: Wen Congyang MIME-Version: 1.0 References: <4F58664D.1070800@cn.fujitsu.com> In-Reply-To: <4F58664D.1070800@cn.fujitsu.com> Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset=ISO-8859-1 Subject: [Qemu-devel] [PATCH 1/2 v3] kvm: notify host when guest panicked List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: kvm list , qemu-devel , "linux-kernel@vger.kernel.org" , Avi Kivity , "Daniel P. Berrange" , KAMEZAWA Hiroyuki , Jan Kiszka , Gleb Natapov 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_PANICKED); + 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_PANICKED 5 /* * hypercalls use architecture specific -- 1.7.1