From patchwork Fri Jul 6 09:41:00 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Wen Congyang X-Patchwork-Id: 1164481 Return-Path: X-Original-To: patchwork-kvm@patchwork.kernel.org Delivered-To: patchwork-process-083081@patchwork2.kernel.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by patchwork2.kernel.org (Postfix) with ESMTP id 9D33FDFF34 for ; Fri, 6 Jul 2012 09:56:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932828Ab2GFJ4P (ORCPT ); Fri, 6 Jul 2012 05:56:15 -0400 Received: from cn.fujitsu.com ([222.73.24.84]:21963 "EHLO song.cn.fujitsu.com" rhost-flags-OK-FAIL-OK-OK) by vger.kernel.org with ESMTP id S1752937Ab2GFJ4J (ORCPT ); Fri, 6 Jul 2012 05:56:09 -0400 X-IronPort-AV: E=Sophos;i="4.77,537,1336320000"; d="scan'208";a="5344264" Received: from unknown (HELO tang.cn.fujitsu.com) ([10.167.250.3]) by song.cn.fujitsu.com with ESMTP; 06 Jul 2012 17:55:15 +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 q669aMHN011969; Fri, 6 Jul 2012 17:36:57 +0800 Received: from [10.167.225.226] ([10.167.225.226]) by fnstmail02.fnst.cn.fujitsu.com (Lotus Domino Release 8.5.3) with ESMTP id 2012070617363073-560417 ; Fri, 6 Jul 2012 17:36:30 +0800 Message-ID: <4FF6B2AC.9010204@cn.fujitsu.com> Date: Fri, 06 Jul 2012 17:41:00 +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 Subject: [PATCH 5/7 v6] introduce a new qom device to deal with panicked event References: <4FF6B188.2060607@cn.fujitsu.com> In-Reply-To: <4FF6B188.2060607@cn.fujitsu.com> X-MIMETrack: Itemize by SMTP Server on mailserver/fnst(Release 8.5.3|September 15, 2011) at 2012/07/06 17:36:30, Serialize by Router on mailserver/fnst(Release 8.5.3|September 15, 2011) at 2012/07/06 17:37:01, Serialize complete at 2012/07/06 17:37:01 Sender: kvm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: kvm@vger.kernel.org If the target is x86/x86_64, the guest's kernel will write 0x01 to the port KVM_PV_PORT when it is panciked. This patch introduces a new qom device kvm_pv_ioport to listen this I/O port, and deal with panicked event according to panicked_action's value. The possible actions are: 1. emit QEVENT_GUEST_PANICKED only 2. emit QEVENT_GUEST_PANICKED and pause the guest 3. emit QEVENT_GUEST_PANICKED and poweroff the guest 4. emit QEVENT_GUEST_PANICKED and reset the guest I/O ports does not work for some targets(for example: s390). And you can implement another qom device, and include it's code into pv_event.c for such target. Note: if we emit QEVENT_GUEST_PANICKED only, and the management application does not receive this event(the management may not run when the event is emitted), the management won't know the guest is panicked. Signed-off-by: Wen Congyang --- hw/kvm/Makefile.objs | 2 +- hw/kvm/pv_event.c | 73 +++++++++++++++++++++++++++ hw/kvm/pv_ioport.c | 133 ++++++++++++++++++++++++++++++++++++++++++++++++++ kvm-stub.c | 9 +++ kvm.h | 3 + vl.c | 4 ++ 6 files changed, 223 insertions(+), 1 deletions(-) create mode 100644 hw/kvm/pv_event.c create mode 100644 hw/kvm/pv_ioport.c diff --git a/hw/kvm/Makefile.objs b/hw/kvm/Makefile.objs index 226497a..23e3b30 100644 --- a/hw/kvm/Makefile.objs +++ b/hw/kvm/Makefile.objs @@ -1 +1 @@ -obj-$(CONFIG_KVM) += clock.o apic.o i8259.o ioapic.o i8254.o +obj-$(CONFIG_KVM) += clock.o apic.o i8259.o ioapic.o i8254.o pv_event.o diff --git a/hw/kvm/pv_event.c b/hw/kvm/pv_event.c new file mode 100644 index 0000000..d7ded37 --- /dev/null +++ b/hw/kvm/pv_event.c @@ -0,0 +1,73 @@ +/* + * QEMU KVM support, paravirtual event device + * + * Copyright Fujitsu, Corp. 2012 + * + * Authors: + * Wen Congyang + * + * This work is licensed under the terms of the GNU GPL, version 2 or later. + * See the COPYING file in the top-level directory. + * + */ + +#include +#include +#include +#include +#include +#include +#include + +/* Possible values for action parameter. */ +#define PANICKED_REPORT 1 /* emit QEVENT_GUEST_PANICKED only */ +#define PANICKED_PAUSE 2 /* emit QEVENT_GUEST_PANICKED and pause VM */ +#define PANICKED_POWEROFF 3 /* emit QEVENT_GUEST_PANICKED and quit VM */ +#define PANICKED_RESET 4 /* emit QEVENT_GUEST_PANICKED and reset VM */ + +static int panicked_action = PANICKED_REPORT; + +static void panicked_mon_event(const char *action) +{ + QObject *data; + + data = qobject_from_jsonf("{ 'action': %s }", action); + monitor_protocol_event(QEVENT_GUEST_PANICKED, data); + qobject_decref(data); +} + +static void panicked_perform_action(uint32_t panicked_action) +{ + switch (panicked_action) { + case PANICKED_REPORT: + panicked_mon_event("report"); + break; + + case PANICKED_PAUSE: + panicked_mon_event("pause"); + vm_stop(RUN_STATE_GUEST_PANICKED); + break; + + case PANICKED_POWEROFF: + panicked_mon_event("poweroff"); + exit(0); + break; + case PANICKED_RESET: + panicked_mon_event("reset"); + qemu_system_reset_request(); + break; + } +} + +#if defined(KVM_PV_PORT) +#include "pv_ioport.c" + +void kvm_pv_event_init(void) +{ + pv_ioport_init(panicked_action); +} +#else +void kvm_pv_event_init(void) +{ +} +#endif diff --git a/hw/kvm/pv_ioport.c b/hw/kvm/pv_ioport.c new file mode 100644 index 0000000..e93d819 --- /dev/null +++ b/hw/kvm/pv_ioport.c @@ -0,0 +1,133 @@ +/* + * QEMU KVM support, paravirtual I/O port device + * + * Copyright Fujitsu, Corp. 2012 + * + * Authors: + * Wen Congyang + * + * This work is licensed under the terms of the GNU GPL, version 2 or later. + * See the COPYING file in the top-level directory. + * + */ + +#include "hw/isa.h" + +typedef struct { + ISADevice dev; + MemoryRegion ioport; + uint32_t panicked_action; +} PVState; + +static PVState *pv_state; + +static uint64_t pv_io_read(void *opaque, target_phys_addr_t addr, unsigned size) +{ + return 1 << KVM_PV_FEATURE_PANICKED; +} + +static void pv_io_write(void *opaque, target_phys_addr_t addr, uint64_t val, + unsigned size) +{ + PVState *s = opaque; + + if (val == KVM_PV_PANICKED) { + panicked_perform_action(s->panicked_action); + } +} + +static const MemoryRegionOps pv_io_ops = { + .read = pv_io_read, + .write = pv_io_write, + .impl = { + .min_access_size = 4, + .max_access_size = 4, + }, +}; + +static int pv_ioport_initfn(ISADevice *dev) +{ + PVState *s = DO_UPCAST(PVState, dev, dev); + + memory_region_init_io(&s->ioport, &pv_io_ops, s, "pv_event", 1); + isa_register_ioport(dev, &s->ioport, KVM_PV_PORT); + + pv_state = s; + + return 0; +} + +static const VMStateDescription pv_ioport_vmsd = { + .name = "pv_ioport", + .version_id = 1, + .minimum_version_id = 1, + .minimum_version_id_old = 1, + .fields = (VMStateField[]) { + VMSTATE_UINT32(panicked_action, PVState), + VMSTATE_END_OF_LIST() + } +}; + +static Property pv_ioport_properties[] = { + DEFINE_PROP_UINT32("panicked_action", PVState, panicked_action, PANICKED_REPORT), + DEFINE_PROP_END_OF_LIST(), +}; + +static void pv_ioport_class_init(ObjectClass *klass, void *data) +{ + DeviceClass *dc = DEVICE_CLASS(klass); + ISADeviceClass *ic = ISA_DEVICE_CLASS(klass); + + ic->init = pv_ioport_initfn; + dc->no_user = 1; + dc->vmsd = &pv_ioport_vmsd; + dc->props = pv_ioport_properties; +} + +static TypeInfo pv_ioport_info = { + .name = "kvm_pv_ioport", + .parent = TYPE_ISA_DEVICE, + .instance_size = sizeof(PVState), + .class_init = pv_ioport_class_init, +}; + +static void pv_ioport_register_types(void) +{ + type_register_static(&pv_ioport_info); +} + +type_init(pv_ioport_register_types) + +static int is_isa_bus(BusState *bus, void *opaque) +{ + const char *bus_type_name; + ISABus **isa_bus_p = opaque; + + bus_type_name = object_class_get_name(bus->obj.class); + if (!strcmp(bus_type_name, TYPE_ISA_BUS)) { + *isa_bus_p = ISA_BUS(&bus->obj); + return -1; + } + + return 0; +} + +static ISABus *get_isa_bus(void) +{ + ISABus *isa_bus = NULL; + + qbus_walk_children(sysbus_get_default(), NULL, is_isa_bus, &isa_bus); + + return isa_bus; +} + +static void pv_ioport_init(uint32_t panicked_action) +{ + ISADevice *dev; + ISABus *bus; + + bus = get_isa_bus(); + dev = isa_create(bus, "kvm_pv_ioport"); + qdev_prop_set_uint32(&dev->qdev, "panicked_action", panicked_action); + qdev_init_nofail(&dev->qdev); +} diff --git a/kvm-stub.c b/kvm-stub.c index ec9a364..a28d078 100644 --- a/kvm-stub.c +++ b/kvm-stub.c @@ -151,3 +151,12 @@ int kvm_irqchip_remove_irqfd(KVMState *s, int fd, int virq) { return -ENOSYS; } + +void kvm_pv_event_init(void) +{ +} + +int select_panicked_action(const char *p) +{ + return 0; +} diff --git a/kvm.h b/kvm.h index 9c7b0ea..1f7c72b 100644 --- a/kvm.h +++ b/kvm.h @@ -218,4 +218,7 @@ void kvm_irqchip_release_virq(KVMState *s, int virq); int kvm_irqchip_add_irqfd(KVMState *s, int fd, int virq); int kvm_irqchip_remove_irqfd(KVMState *s, int fd, int virq); + +void kvm_pv_event_init(void); +int select_panicked_action(const char *p); #endif diff --git a/vl.c b/vl.c index ea5ef1c..f5cd28d 100644 --- a/vl.c +++ b/vl.c @@ -3622,6 +3622,10 @@ int main(int argc, char **argv, char **envp) exit(1); } + if (kvm_enabled()) { + kvm_pv_event_init(); + } + qdev_machine_creation_done(); if (rom_load_all() != 0) {