Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758175Ab2HWC07 (ORCPT ); Wed, 22 Aug 2012 22:26:59 -0400 Received: from cn.fujitsu.com ([222.73.24.84]:32944 "EHLO song.cn.fujitsu.com" rhost-flags-OK-FAIL-OK-OK) by vger.kernel.org with ESMTP id S1754380Ab2HWC04 (ORCPT ); Wed, 22 Aug 2012 22:26:56 -0400 X-IronPort-AV: E=Sophos;i="4.77,812,1336320000"; d="scan'208";a="5700346" Message-ID: <5035962D.8050907@cn.fujitsu.com> Date: Thu, 23 Aug 2012 10:32:13 +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 , Blue Swirl , Eric Blake , Andrew Jones , Marcelo Tosatti Subject: [PATCH v9 5/6] introduce a new qom device to deal with panicked event References: <50359561.9070001@cn.fujitsu.com> In-Reply-To: <50359561.9070001@cn.fujitsu.com> X-MIMETrack: Itemize by SMTP Server on mailserver/fnst(Release 8.5.3|September 15, 2011) at 2012/08/23 10:26:52, Serialize by Router on mailserver/fnst(Release 8.5.3|September 15, 2011) at 2012/08/23 10:26:53, Serialize complete at 2012/08/23 10:26:53 Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset=ISO-8859-1 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 7700 Lines: 276 If the target is x86/x86_64, the guest's kernel will write 0x01 to the port KVM_PV_EVENT_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 | 190 ++++++++++++++++++++++++++++++++++++++++++++++++++ hw/pc_piix.c | 9 +++ kvm.h | 2 + 4 files changed, 202 insertions(+), 1 deletions(-) create mode 100644 hw/kvm/pv_event.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..c03dd22 --- /dev/null +++ b/hw/kvm/pv_event.c @@ -0,0 +1,190 @@ +/* + * 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 */ + +#define PV_EVENT_DRIVER "kvm_pv_event" + +struct PVEventAction { + char *panicked_action; + int panicked_action_value; +}; + +#define DEFINE_PV_EVENT_PROPERTIES(_state, _conf) \ + DEFINE_PROP_STRING("panicked_action", _state, _conf.panicked_action) + +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"); + qemu_system_shutdown_request(); + break; + + case PANICKED_RESET: + panicked_mon_event("reset"); + qemu_system_reset_request(); + break; + } +} + +static uint64_t supported_event(void) +{ + return 1 << KVM_PV_FEATURE_PANICKED; +} + +static void handle_event(int event, struct PVEventAction *conf) +{ + if (event == KVM_PV_EVENT_PANICKED) { + panicked_perform_action(conf->panicked_action_value); + } +} + +static int pv_event_init(struct PVEventAction *conf) +{ + if (!conf->panicked_action) { + conf->panicked_action_value = PANICKED_REPORT; + } else if (strcasecmp(conf->panicked_action, "none") == 0) { + conf->panicked_action_value = PANICKED_REPORT; + } else if (strcasecmp(conf->panicked_action, "pause") == 0) { + conf->panicked_action_value = PANICKED_PAUSE; + } else if (strcasecmp(conf->panicked_action, "poweroff") == 0) { + conf->panicked_action_value = PANICKED_POWEROFF; + } else if (strcasecmp(conf->panicked_action, "reset") == 0) { + conf->panicked_action_value = PANICKED_RESET; + } else { + return -1; + } + + return 0; +} + +#if defined(KVM_PV_EVENT_PORT) + +#include "hw/isa.h" + +typedef struct { + ISADevice dev; + struct PVEventAction conf; + MemoryRegion ioport; +} PVIOPortState; + +static uint64_t pv_io_read(void *opaque, target_phys_addr_t addr, unsigned size) +{ + return supported_event(); +} + +static void pv_io_write(void *opaque, target_phys_addr_t addr, uint64_t val, + unsigned size) +{ + PVIOPortState *s = opaque; + + handle_event(val, &s->conf); +} + +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) +{ + PVIOPortState *s = DO_UPCAST(PVIOPortState, dev, dev); + + if (pv_event_init(&s->conf) < 0) { + return -1; + } + + memory_region_init_io(&s->ioport, &pv_io_ops, s, "pv_event", 1); + isa_register_ioport(dev, &s->ioport, KVM_PV_EVENT_PORT); + + return 0; +} + +static Property pv_ioport_properties[] = { + DEFINE_PV_EVENT_PROPERTIES(PVIOPortState, conf), + 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->props = pv_ioport_properties; +} + +static TypeInfo pv_ioport_info = { + .name = PV_EVENT_DRIVER, + .parent = TYPE_ISA_DEVICE, + .instance_size = sizeof(PVIOPortState), + .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) + +void kvm_pv_event_init(void *opaque) +{ + ISABus *bus = opaque; + ISADevice *dev; + + dev = isa_create(bus, PV_EVENT_DRIVER); + qdev_init_nofail(&dev->qdev); +} + +#else +void kvm_pv_event_init(void *opaque) +{ +} +#endif diff --git a/hw/pc_piix.c b/hw/pc_piix.c index 88ff041..f73fb85 100644 --- a/hw/pc_piix.c +++ b/hw/pc_piix.c @@ -46,6 +46,9 @@ #ifdef CONFIG_XEN # include #endif +#ifdef CONFIG_KVM +# include +#endif #define MAX_IDE_BUS 2 @@ -285,6 +288,12 @@ static void pc_init1(MemoryRegion *system_memory, if (pci_enabled) { pc_pci_device_init(pci_bus); } + +#ifdef KVM_PV_EVENT_PORT + if (kvm_enabled()) { + kvm_pv_event_init(isa_bus); + } +#endif } static void pc_init_pci(ram_addr_t ram_size, diff --git a/kvm.h b/kvm.h index 5b8f588..41ce1b2 100644 --- a/kvm.h +++ b/kvm.h @@ -276,4 +276,6 @@ int kvm_irqchip_add_irqfd(KVMState *s, int fd, int virq); int kvm_irqchip_remove_irqfd(KVMState *s, int fd, int virq); int kvm_irqchip_add_irq_notifier(KVMState *s, EventNotifier *n, int virq); int kvm_irqchip_remove_irq_notifier(KVMState *s, EventNotifier *n, int virq); + +void kvm_pv_event_init(void *opaque); #endif -- 1.7.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/