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/*
* QEMU simulated pvpanic device.
*
* Copyright Fujitsu, Corp. 2013
*
* Authors:
* Wen Congyang <wency@cn.fujitsu.com>
* Hu Tao <hutao@cn.fujitsu.com>
*
* 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 "qemu/osdep.h"
#include "sysemu/sysemu.h"
#include "qemu/log.h"
#include "qemu/module.h"
#include "hw/nvram/fw_cfg.h"
#include "hw/misc/pvpanic.h"
/* The bit of supported pv event */
#define PVPANIC_F_PANICKED 0
/* The pv event value */
#define PVPANIC_PANICKED (1 << PVPANIC_F_PANICKED)
#define ISA_PVPANIC_DEVICE(obj) \
OBJECT_CHECK(PVPanicState, (obj), TYPE_PVPANIC)
static void handle_event(int event)
{
static bool logged;
if (event & ~PVPANIC_PANICKED && !logged) {
qemu_log_mask(LOG_GUEST_ERROR, "pvpanic: unknown event %#x.\n", event);
logged = true;
}
if (event & PVPANIC_PANICKED) {
qemu_system_guest_panicked(NULL);
return;
}
}
#include "hw/isa/isa.h"
typedef struct PVPanicState {
ISADevice parent_obj;
MemoryRegion io;
uint16_t ioport;
} PVPanicState;
/* return supported events on read */
static uint64_t pvpanic_ioport_read(void *opaque, hwaddr addr, unsigned size)
{
return PVPANIC_PANICKED;
}
static void pvpanic_ioport_write(void *opaque, hwaddr addr, uint64_t val,
unsigned size)
{
handle_event(val);
}
static const MemoryRegionOps pvpanic_ops = {
.read = pvpanic_ioport_read,
.write = pvpanic_ioport_write,
.impl = {
.min_access_size = 1,
.max_access_size = 1,
},
};
static void pvpanic_isa_initfn(Object *obj)
{
PVPanicState *s = ISA_PVPANIC_DEVICE(obj);
memory_region_init_io(&s->io, OBJECT(s), &pvpanic_ops, s, "pvpanic", 1);
}
static void pvpanic_isa_realizefn(DeviceState *dev, Error **errp)
{
ISADevice *d = ISA_DEVICE(dev);
PVPanicState *s = ISA_PVPANIC_DEVICE(dev);
FWCfgState *fw_cfg = fw_cfg_find();
uint16_t *pvpanic_port;
if (!fw_cfg) {
return;
}
pvpanic_port = g_malloc(sizeof(*pvpanic_port));
*pvpanic_port = cpu_to_le16(s->ioport);
fw_cfg_add_file(fw_cfg, "etc/pvpanic-port", pvpanic_port,
sizeof(*pvpanic_port));
isa_register_ioport(d, &s->io, s->ioport);
}
static Property pvpanic_isa_properties[] = {
DEFINE_PROP_UINT16(PVPANIC_IOPORT_PROP, PVPanicState, ioport, 0x505),
DEFINE_PROP_END_OF_LIST(),
};
static void pvpanic_isa_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
dc->realize = pvpanic_isa_realizefn;
dc->props = pvpanic_isa_properties;
set_bit(DEVICE_CATEGORY_MISC, dc->categories);
}
static TypeInfo pvpanic_isa_info = {
.name = TYPE_PVPANIC,
.parent = TYPE_ISA_DEVICE,
.instance_size = sizeof(PVPanicState),
.instance_init = pvpanic_isa_initfn,
.class_init = pvpanic_isa_class_init,
};
static void pvpanic_register_types(void)
{
type_register_static(&pvpanic_isa_info);
}
type_init(pvpanic_register_types)
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