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eec3d2ad HT |
1 | /* |
2 | * QEMU simulated pvpanic device. | |
3 | * | |
4 | * Copyright Fujitsu, Corp. 2013 | |
5 | * | |
6 | * Authors: | |
7 | * Wen Congyang <wency@cn.fujitsu.com> | |
8 | * Hu Tao <hutao@cn.fujitsu.com> | |
9 | * | |
10 | * This work is licensed under the terms of the GNU GPL, version 2 or later. | |
11 | * See the COPYING file in the top-level directory. | |
12 | * | |
13 | */ | |
14 | ||
15 | #include "qapi/qmp/qobject.h" | |
16 | #include "qapi/qmp/qjson.h" | |
17 | #include "monitor/monitor.h" | |
18 | #include "sysemu/sysemu.h" | |
19 | #include "qemu/log.h" | |
20 | ||
10a584b2 | 21 | #include "hw/nvram/fw_cfg.h" |
3ab135f3 | 22 | #include "hw/i386/pc.h" |
10a584b2 | 23 | |
eec3d2ad HT |
24 | /* The bit of supported pv event */ |
25 | #define PVPANIC_F_PANICKED 0 | |
26 | ||
27 | /* The pv event value */ | |
28 | #define PVPANIC_PANICKED (1 << PVPANIC_F_PANICKED) | |
29 | ||
30 | #define TYPE_ISA_PVPANIC_DEVICE "pvpanic" | |
31 | #define ISA_PVPANIC_DEVICE(obj) \ | |
32 | OBJECT_CHECK(PVPanicState, (obj), TYPE_ISA_PVPANIC_DEVICE) | |
33 | ||
34 | static void panicked_mon_event(const char *action) | |
35 | { | |
36 | QObject *data; | |
37 | ||
38 | data = qobject_from_jsonf("{ 'action': %s }", action); | |
39 | monitor_protocol_event(QEVENT_GUEST_PANICKED, data); | |
40 | qobject_decref(data); | |
41 | } | |
42 | ||
43 | static void handle_event(int event) | |
44 | { | |
45 | static bool logged; | |
46 | ||
47 | if (event & ~PVPANIC_PANICKED && !logged) { | |
48 | qemu_log_mask(LOG_GUEST_ERROR, "pvpanic: unknown event %#x.\n", event); | |
49 | logged = true; | |
50 | } | |
51 | ||
52 | if (event & PVPANIC_PANICKED) { | |
53 | panicked_mon_event("pause"); | |
54 | vm_stop(RUN_STATE_GUEST_PANICKED); | |
55 | return; | |
56 | } | |
57 | } | |
58 | ||
59 | #include "hw/isa/isa.h" | |
60 | ||
61 | typedef struct PVPanicState { | |
62 | ISADevice parent_obj; | |
63 | ||
64 | MemoryRegion io; | |
65 | uint16_t ioport; | |
66 | } PVPanicState; | |
67 | ||
68 | /* return supported events on read */ | |
69 | static uint64_t pvpanic_ioport_read(void *opaque, hwaddr addr, unsigned size) | |
70 | { | |
71 | return PVPANIC_PANICKED; | |
72 | } | |
73 | ||
74 | static void pvpanic_ioport_write(void *opaque, hwaddr addr, uint64_t val, | |
75 | unsigned size) | |
76 | { | |
77 | handle_event(val); | |
78 | } | |
79 | ||
80 | static const MemoryRegionOps pvpanic_ops = { | |
81 | .read = pvpanic_ioport_read, | |
82 | .write = pvpanic_ioport_write, | |
83 | .impl = { | |
84 | .min_access_size = 1, | |
85 | .max_access_size = 1, | |
86 | }, | |
87 | }; | |
88 | ||
db895a1e | 89 | static void pvpanic_isa_initfn(Object *obj) |
eec3d2ad | 90 | { |
db895a1e AF |
91 | PVPanicState *s = ISA_PVPANIC_DEVICE(obj); |
92 | ||
3c161542 | 93 | memory_region_init_io(&s->io, OBJECT(s), &pvpanic_ops, s, "pvpanic", 1); |
db895a1e AF |
94 | } |
95 | ||
96 | static void pvpanic_isa_realizefn(DeviceState *dev, Error **errp) | |
97 | { | |
98 | ISADevice *d = ISA_DEVICE(dev); | |
eec3d2ad | 99 | PVPanicState *s = ISA_PVPANIC_DEVICE(dev); |
a5d3f640 MA |
100 | FWCfgState *fw_cfg = fw_cfg_find(); |
101 | uint16_t *pvpanic_port; | |
eec3d2ad | 102 | |
a5d3f640 MA |
103 | if (!fw_cfg) { |
104 | return; | |
105 | } | |
eec3d2ad | 106 | |
a5d3f640 | 107 | pvpanic_port = g_malloc(sizeof(*pvpanic_port)); |
fea7d596 | 108 | *pvpanic_port = cpu_to_le16(s->ioport); |
fea7d596 MT |
109 | fw_cfg_add_file(fw_cfg, "etc/pvpanic-port", pvpanic_port, |
110 | sizeof(*pvpanic_port)); | |
a5d3f640 MA |
111 | |
112 | isa_register_ioport(d, &s->io, s->ioport); | |
eec3d2ad HT |
113 | } |
114 | ||
309cd62d MT |
115 | #define PVPANIC_IOPORT_PROP "ioport" |
116 | ||
117 | uint16_t pvpanic_port(void) | |
118 | { | |
119 | Object *o = object_resolve_path_type("", TYPE_ISA_PVPANIC_DEVICE, NULL); | |
120 | if (!o) { | |
121 | return 0; | |
122 | } | |
123 | return object_property_get_int(o, PVPANIC_IOPORT_PROP, NULL); | |
124 | } | |
125 | ||
eec3d2ad | 126 | static Property pvpanic_isa_properties[] = { |
309cd62d | 127 | DEFINE_PROP_UINT16(PVPANIC_IOPORT_PROP, PVPanicState, ioport, 0x505), |
eec3d2ad HT |
128 | DEFINE_PROP_END_OF_LIST(), |
129 | }; | |
130 | ||
131 | static void pvpanic_isa_class_init(ObjectClass *klass, void *data) | |
132 | { | |
133 | DeviceClass *dc = DEVICE_CLASS(klass); | |
eec3d2ad | 134 | |
db895a1e | 135 | dc->realize = pvpanic_isa_realizefn; |
eec3d2ad | 136 | dc->props = pvpanic_isa_properties; |
a5d3f640 | 137 | set_bit(DEVICE_CATEGORY_MISC, dc->categories); |
eec3d2ad HT |
138 | } |
139 | ||
140 | static TypeInfo pvpanic_isa_info = { | |
141 | .name = TYPE_ISA_PVPANIC_DEVICE, | |
142 | .parent = TYPE_ISA_DEVICE, | |
143 | .instance_size = sizeof(PVPanicState), | |
db895a1e | 144 | .instance_init = pvpanic_isa_initfn, |
eec3d2ad HT |
145 | .class_init = pvpanic_isa_class_init, |
146 | }; | |
147 | ||
148 | static void pvpanic_register_types(void) | |
149 | { | |
150 | type_register_static(&pvpanic_isa_info); | |
151 | } | |
152 | ||
153 | type_init(pvpanic_register_types) |