1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
|
/*
* 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 "qapi/qmp/qobject.h"
#include "qapi/qmp/qjson.h"
#include "monitor/monitor.h"
#include "sysemu/sysemu.h"
#include "qemu/log.h"
#include "hw/nvram/fw_cfg.h"
#include "hw/i386/pc.h"
/* The bit of supported pv event */
#define PVPANIC_F_PANICKED 0
/* The pv event value */
#define PVPANIC_PANICKED (1 << PVPANIC_F_PANICKED)
#define TYPE_ISA_PVPANIC_DEVICE "pvpanic"
#define ISA_PVPANIC_DEVICE(obj) \
OBJECT_CHECK(PVPanicState, (obj), TYPE_ISA_PVPANIC_DEVICE)
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 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) {
panicked_mon_event("pause");
vm_stop(RUN_STATE_GUEST_PANICKED);
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 int pvpanic_isa_initfn(ISADevice *dev)
{
PVPanicState *s = ISA_PVPANIC_DEVICE(dev);
static bool port_configured;
void *fw_cfg;
memory_region_init_io(&s->io, &pvpanic_ops, s, "pvpanic", 1);
isa_register_ioport(dev, &s->io, s->ioport);
if (!port_configured) {
fw_cfg = object_resolve_path("/machine/fw_cfg", NULL);
if (fw_cfg) {
fw_cfg_add_file(fw_cfg, "etc/pvpanic-port",
g_memdup(&s->ioport, sizeof(s->ioport)),
sizeof(s->ioport));
port_configured = true;
}
}
return 0;
}
int pvpanic_init(ISABus *bus)
{
isa_create_simple(bus, TYPE_ISA_PVPANIC_DEVICE);
return 0;
}
static Property pvpanic_isa_properties[] = {
DEFINE_PROP_UINT16("ioport", PVPanicState, ioport, 0x505),
DEFINE_PROP_END_OF_LIST(),
};
static void pvpanic_isa_class_init(ObjectClass *klass, void *data)
{
DeviceClass *dc = DEVICE_CLASS(klass);
ISADeviceClass *ic = ISA_DEVICE_CLASS(klass);
ic->init = pvpanic_isa_initfn;
dc->no_user = 1;
dc->props = pvpanic_isa_properties;
}
static TypeInfo pvpanic_isa_info = {
.name = TYPE_ISA_PVPANIC_DEVICE,
.parent = TYPE_ISA_DEVICE,
.instance_size = sizeof(PVPanicState),
.class_init = pvpanic_isa_class_init,
};
static void pvpanic_register_types(void)
{
type_register_static(&pvpanic_isa_info);
}
type_init(pvpanic_register_types)
|
