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 "qemu/osdep.h" 16 #include "qemu/log.h" 17 #include "qemu/module.h" 18 #include "sysemu/runstate.h" 19 20 #include "hw/nvram/fw_cfg.h" 21 #include "hw/qdev-properties.h" 22 #include "hw/misc/pvpanic.h" 23 #include "qom/object.h" 24 25 /* The bit of supported pv event, TODO: include uapi header and remove this */ 26 #define PVPANIC_F_PANICKED 0 27 #define PVPANIC_F_CRASHLOADED 1 28 29 /* The pv event value */ 30 #define PVPANIC_PANICKED (1 << PVPANIC_F_PANICKED) 31 #define PVPANIC_CRASHLOADED (1 << PVPANIC_F_CRASHLOADED) 32 33 typedef struct PVPanicState PVPanicState; 34 DECLARE_INSTANCE_CHECKER(PVPanicState, ISA_PVPANIC_DEVICE, 35 TYPE_PVPANIC) 36 37 static void handle_event(int event) 38 { 39 static bool logged; 40 41 if (event & ~(PVPANIC_PANICKED | PVPANIC_CRASHLOADED) && !logged) { 42 qemu_log_mask(LOG_GUEST_ERROR, "pvpanic: unknown event %#x.\n", event); 43 logged = true; 44 } 45 46 if (event & PVPANIC_PANICKED) { 47 qemu_system_guest_panicked(NULL); 48 return; 49 } 50 51 if (event & PVPANIC_CRASHLOADED) { 52 qemu_system_guest_crashloaded(NULL); 53 return; 54 } 55 } 56 57 #include "hw/isa/isa.h" 58 59 struct PVPanicState { 60 ISADevice parent_obj; 61 62 MemoryRegion io; 63 uint16_t ioport; 64 uint8_t events; 65 }; 66 67 /* return supported events on read */ 68 static uint64_t pvpanic_ioport_read(void *opaque, hwaddr addr, unsigned size) 69 { 70 PVPanicState *pvp = opaque; 71 return pvp->events; 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 89 static void pvpanic_isa_initfn(Object *obj) 90 { 91 PVPanicState *s = ISA_PVPANIC_DEVICE(obj); 92 93 memory_region_init_io(&s->io, OBJECT(s), &pvpanic_ops, s, "pvpanic", 1); 94 } 95 96 static void pvpanic_isa_realizefn(DeviceState *dev, Error **errp) 97 { 98 ISADevice *d = ISA_DEVICE(dev); 99 PVPanicState *s = ISA_PVPANIC_DEVICE(dev); 100 FWCfgState *fw_cfg = fw_cfg_find(); 101 uint16_t *pvpanic_port; 102 103 if (!fw_cfg) { 104 return; 105 } 106 107 pvpanic_port = g_malloc(sizeof(*pvpanic_port)); 108 *pvpanic_port = cpu_to_le16(s->ioport); 109 fw_cfg_add_file(fw_cfg, "etc/pvpanic-port", pvpanic_port, 110 sizeof(*pvpanic_port)); 111 112 isa_register_ioport(d, &s->io, s->ioport); 113 } 114 115 static Property pvpanic_isa_properties[] = { 116 DEFINE_PROP_UINT16(PVPANIC_IOPORT_PROP, PVPanicState, ioport, 0x505), 117 DEFINE_PROP_UINT8("events", PVPanicState, events, PVPANIC_PANICKED | PVPANIC_CRASHLOADED), 118 DEFINE_PROP_END_OF_LIST(), 119 }; 120 121 static void pvpanic_isa_class_init(ObjectClass *klass, void *data) 122 { 123 DeviceClass *dc = DEVICE_CLASS(klass); 124 125 dc->realize = pvpanic_isa_realizefn; 126 device_class_set_props(dc, pvpanic_isa_properties); 127 set_bit(DEVICE_CATEGORY_MISC, dc->categories); 128 } 129 130 static TypeInfo pvpanic_isa_info = { 131 .name = TYPE_PVPANIC, 132 .parent = TYPE_ISA_DEVICE, 133 .instance_size = sizeof(PVPanicState), 134 .instance_init = pvpanic_isa_initfn, 135 .class_init = pvpanic_isa_class_init, 136 }; 137 138 static void pvpanic_register_types(void) 139 { 140 type_register_static(&pvpanic_isa_info); 141 } 142 143 type_init(pvpanic_register_types) 144