mirror of https://gitee.com/openkylin/qemu.git
144 lines
3.4 KiB
C
144 lines
3.4 KiB
C
/*
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* QEMU simulated pvpanic device.
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*
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* Copyright Fujitsu, Corp. 2013
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*
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* Authors:
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* Wen Congyang <wency@cn.fujitsu.com>
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* Hu Tao <hutao@cn.fujitsu.com>
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*
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* This work is licensed under the terms of the GNU GPL, version 2 or later.
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* See the COPYING file in the top-level directory.
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*
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*/
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#include "qapi/qmp/qobject.h"
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#include "qapi/qmp/qjson.h"
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#include "sysemu/sysemu.h"
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#include "qemu/log.h"
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#include "hw/nvram/fw_cfg.h"
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#include "hw/i386/pc.h"
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#include "qapi-event.h"
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/* The bit of supported pv event */
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#define PVPANIC_F_PANICKED 0
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/* The pv event value */
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#define PVPANIC_PANICKED (1 << PVPANIC_F_PANICKED)
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#define TYPE_ISA_PVPANIC_DEVICE "pvpanic"
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#define ISA_PVPANIC_DEVICE(obj) \
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OBJECT_CHECK(PVPanicState, (obj), TYPE_ISA_PVPANIC_DEVICE)
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static void handle_event(int event)
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{
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static bool logged;
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if (event & ~PVPANIC_PANICKED && !logged) {
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qemu_log_mask(LOG_GUEST_ERROR, "pvpanic: unknown event %#x.\n", event);
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logged = true;
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}
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if (event & PVPANIC_PANICKED) {
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qemu_system_guest_panicked();
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return;
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}
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}
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#include "hw/isa/isa.h"
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typedef struct PVPanicState {
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ISADevice parent_obj;
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MemoryRegion io;
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uint16_t ioport;
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} PVPanicState;
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/* return supported events on read */
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static uint64_t pvpanic_ioport_read(void *opaque, hwaddr addr, unsigned size)
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{
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return PVPANIC_PANICKED;
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}
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static void pvpanic_ioport_write(void *opaque, hwaddr addr, uint64_t val,
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unsigned size)
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{
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handle_event(val);
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}
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static const MemoryRegionOps pvpanic_ops = {
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.read = pvpanic_ioport_read,
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.write = pvpanic_ioport_write,
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.impl = {
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.min_access_size = 1,
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.max_access_size = 1,
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},
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};
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static void pvpanic_isa_initfn(Object *obj)
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{
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PVPanicState *s = ISA_PVPANIC_DEVICE(obj);
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memory_region_init_io(&s->io, OBJECT(s), &pvpanic_ops, s, "pvpanic", 1);
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}
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static void pvpanic_isa_realizefn(DeviceState *dev, Error **errp)
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{
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ISADevice *d = ISA_DEVICE(dev);
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PVPanicState *s = ISA_PVPANIC_DEVICE(dev);
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FWCfgState *fw_cfg = fw_cfg_find();
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uint16_t *pvpanic_port;
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if (!fw_cfg) {
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return;
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}
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pvpanic_port = g_malloc(sizeof(*pvpanic_port));
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*pvpanic_port = cpu_to_le16(s->ioport);
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fw_cfg_add_file(fw_cfg, "etc/pvpanic-port", pvpanic_port,
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sizeof(*pvpanic_port));
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isa_register_ioport(d, &s->io, s->ioport);
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}
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#define PVPANIC_IOPORT_PROP "ioport"
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uint16_t pvpanic_port(void)
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{
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Object *o = object_resolve_path_type("", TYPE_ISA_PVPANIC_DEVICE, NULL);
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if (!o) {
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return 0;
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}
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return object_property_get_int(o, PVPANIC_IOPORT_PROP, NULL);
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}
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static Property pvpanic_isa_properties[] = {
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DEFINE_PROP_UINT16(PVPANIC_IOPORT_PROP, PVPanicState, ioport, 0x505),
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DEFINE_PROP_END_OF_LIST(),
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};
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static void pvpanic_isa_class_init(ObjectClass *klass, void *data)
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{
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DeviceClass *dc = DEVICE_CLASS(klass);
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dc->realize = pvpanic_isa_realizefn;
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dc->props = pvpanic_isa_properties;
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set_bit(DEVICE_CATEGORY_MISC, dc->categories);
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}
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static TypeInfo pvpanic_isa_info = {
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.name = TYPE_ISA_PVPANIC_DEVICE,
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.parent = TYPE_ISA_DEVICE,
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.instance_size = sizeof(PVPanicState),
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.instance_init = pvpanic_isa_initfn,
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.class_init = pvpanic_isa_class_init,
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};
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static void pvpanic_register_types(void)
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{
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type_register_static(&pvpanic_isa_info);
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}
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type_init(pvpanic_register_types)
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