1 #include "qemu/osdep.h" 2 #include "hw/acpi/memory_hotplug.h" 3 #include "hw/acpi/pc-hotplug.h" 4 #include "hw/mem/pc-dimm.h" 5 #include "hw/boards.h" 6 #include "hw/qdev-core.h" 7 #include "trace.h" 8 #include "qapi-event.h" 9 10 static ACPIOSTInfo *acpi_memory_device_status(int slot, MemStatus *mdev) 11 { 12 ACPIOSTInfo *info = g_new0(ACPIOSTInfo, 1); 13 14 info->slot_type = ACPI_SLOT_TYPE_DIMM; 15 info->slot = g_strdup_printf("%d", slot); 16 info->source = mdev->ost_event; 17 info->status = mdev->ost_status; 18 if (mdev->dimm) { 19 DeviceState *dev = DEVICE(mdev->dimm); 20 if (dev->id) { 21 info->device = g_strdup(dev->id); 22 info->has_device = true; 23 } 24 } 25 return info; 26 } 27 28 void acpi_memory_ospm_status(MemHotplugState *mem_st, ACPIOSTInfoList ***list) 29 { 30 int i; 31 32 for (i = 0; i < mem_st->dev_count; i++) { 33 ACPIOSTInfoList *elem = g_new0(ACPIOSTInfoList, 1); 34 elem->value = acpi_memory_device_status(i, &mem_st->devs[i]); 35 elem->next = NULL; 36 **list = elem; 37 *list = &elem->next; 38 } 39 } 40 41 static uint64_t acpi_memory_hotplug_read(void *opaque, hwaddr addr, 42 unsigned int size) 43 { 44 uint32_t val = 0; 45 MemHotplugState *mem_st = opaque; 46 MemStatus *mdev; 47 Object *o; 48 49 if (mem_st->selector >= mem_st->dev_count) { 50 trace_mhp_acpi_invalid_slot_selected(mem_st->selector); 51 return 0; 52 } 53 54 mdev = &mem_st->devs[mem_st->selector]; 55 o = OBJECT(mdev->dimm); 56 switch (addr) { 57 case 0x0: /* Lo part of phys address where DIMM is mapped */ 58 val = o ? object_property_get_int(o, PC_DIMM_ADDR_PROP, NULL) : 0; 59 trace_mhp_acpi_read_addr_lo(mem_st->selector, val); 60 break; 61 case 0x4: /* Hi part of phys address where DIMM is mapped */ 62 val = o ? object_property_get_int(o, PC_DIMM_ADDR_PROP, NULL) >> 32 : 0; 63 trace_mhp_acpi_read_addr_hi(mem_st->selector, val); 64 break; 65 case 0x8: /* Lo part of DIMM size */ 66 val = o ? object_property_get_int(o, PC_DIMM_SIZE_PROP, NULL) : 0; 67 trace_mhp_acpi_read_size_lo(mem_st->selector, val); 68 break; 69 case 0xc: /* Hi part of DIMM size */ 70 val = o ? object_property_get_int(o, PC_DIMM_SIZE_PROP, NULL) >> 32 : 0; 71 trace_mhp_acpi_read_size_hi(mem_st->selector, val); 72 break; 73 case 0x10: /* node proximity for _PXM method */ 74 val = o ? object_property_get_int(o, PC_DIMM_NODE_PROP, NULL) : 0; 75 trace_mhp_acpi_read_pxm(mem_st->selector, val); 76 break; 77 case 0x14: /* pack and return is_* fields */ 78 val |= mdev->is_enabled ? 1 : 0; 79 val |= mdev->is_inserting ? 2 : 0; 80 val |= mdev->is_removing ? 4 : 0; 81 trace_mhp_acpi_read_flags(mem_st->selector, val); 82 break; 83 default: 84 val = ~0; 85 break; 86 } 87 return val; 88 } 89 90 static void acpi_memory_hotplug_write(void *opaque, hwaddr addr, uint64_t data, 91 unsigned int size) 92 { 93 MemHotplugState *mem_st = opaque; 94 MemStatus *mdev; 95 ACPIOSTInfo *info; 96 DeviceState *dev = NULL; 97 HotplugHandler *hotplug_ctrl = NULL; 98 Error *local_err = NULL; 99 100 if (!mem_st->dev_count) { 101 return; 102 } 103 104 if (addr) { 105 if (mem_st->selector >= mem_st->dev_count) { 106 trace_mhp_acpi_invalid_slot_selected(mem_st->selector); 107 return; 108 } 109 } 110 111 switch (addr) { 112 case 0x0: /* DIMM slot selector */ 113 mem_st->selector = data; 114 trace_mhp_acpi_write_slot(mem_st->selector); 115 break; 116 case 0x4: /* _OST event */ 117 mdev = &mem_st->devs[mem_st->selector]; 118 if (data == 1) { 119 /* TODO: handle device insert OST event */ 120 } else if (data == 3) { 121 /* TODO: handle device remove OST event */ 122 } 123 mdev->ost_event = data; 124 trace_mhp_acpi_write_ost_ev(mem_st->selector, mdev->ost_event); 125 break; 126 case 0x8: /* _OST status */ 127 mdev = &mem_st->devs[mem_st->selector]; 128 mdev->ost_status = data; 129 trace_mhp_acpi_write_ost_status(mem_st->selector, mdev->ost_status); 130 /* TODO: implement memory removal on guest signal */ 131 132 info = acpi_memory_device_status(mem_st->selector, mdev); 133 qapi_event_send_acpi_device_ost(info, &error_abort); 134 qapi_free_ACPIOSTInfo(info); 135 break; 136 case 0x14: /* set is_* fields */ 137 mdev = &mem_st->devs[mem_st->selector]; 138 if (data & 2) { /* clear insert event */ 139 mdev->is_inserting = false; 140 trace_mhp_acpi_clear_insert_evt(mem_st->selector); 141 } else if (data & 4) { 142 mdev->is_removing = false; 143 trace_mhp_acpi_clear_remove_evt(mem_st->selector); 144 } else if (data & 8) { 145 if (!mdev->is_enabled) { 146 trace_mhp_acpi_ejecting_invalid_slot(mem_st->selector); 147 break; 148 } 149 150 dev = DEVICE(mdev->dimm); 151 hotplug_ctrl = qdev_get_hotplug_handler(dev); 152 /* call pc-dimm unplug cb */ 153 hotplug_handler_unplug(hotplug_ctrl, dev, &local_err); 154 if (local_err) { 155 trace_mhp_acpi_pc_dimm_delete_failed(mem_st->selector); 156 qapi_event_send_mem_unplug_error(dev->id, 157 error_get_pretty(local_err), 158 &error_abort); 159 error_free(local_err); 160 break; 161 } 162 trace_mhp_acpi_pc_dimm_deleted(mem_st->selector); 163 } 164 break; 165 default: 166 break; 167 } 168 169 } 170 static const MemoryRegionOps acpi_memory_hotplug_ops = { 171 .read = acpi_memory_hotplug_read, 172 .write = acpi_memory_hotplug_write, 173 .endianness = DEVICE_LITTLE_ENDIAN, 174 .valid = { 175 .min_access_size = 1, 176 .max_access_size = 4, 177 }, 178 }; 179 180 void acpi_memory_hotplug_init(MemoryRegion *as, Object *owner, 181 MemHotplugState *state) 182 { 183 MachineState *machine = MACHINE(qdev_get_machine()); 184 185 state->dev_count = machine->ram_slots; 186 if (!state->dev_count) { 187 return; 188 } 189 190 state->devs = g_malloc0(sizeof(*state->devs) * state->dev_count); 191 memory_region_init_io(&state->io, owner, &acpi_memory_hotplug_ops, state, 192 "acpi-mem-hotplug", ACPI_MEMORY_HOTPLUG_IO_LEN); 193 memory_region_add_subregion(as, ACPI_MEMORY_HOTPLUG_BASE, &state->io); 194 } 195 196 /** 197 * acpi_memory_slot_status: 198 * @mem_st: memory hotplug state 199 * @dev: device 200 * @errp: set in case of an error 201 * 202 * Obtain a single memory slot status. 203 * 204 * This function will be called by memory unplug request cb and unplug cb. 205 */ 206 static MemStatus * 207 acpi_memory_slot_status(MemHotplugState *mem_st, 208 DeviceState *dev, Error **errp) 209 { 210 Error *local_err = NULL; 211 int slot = object_property_get_int(OBJECT(dev), PC_DIMM_SLOT_PROP, 212 &local_err); 213 214 if (local_err) { 215 error_propagate(errp, local_err); 216 return NULL; 217 } 218 219 if (slot >= mem_st->dev_count) { 220 char *dev_path = object_get_canonical_path(OBJECT(dev)); 221 error_setg(errp, "acpi_memory_slot_status: " 222 "device [%s] returned invalid memory slot[%d]", 223 dev_path, slot); 224 g_free(dev_path); 225 return NULL; 226 } 227 228 return &mem_st->devs[slot]; 229 } 230 231 void acpi_memory_plug_cb(ACPIREGS *ar, qemu_irq irq, MemHotplugState *mem_st, 232 DeviceState *dev, Error **errp) 233 { 234 MemStatus *mdev; 235 DeviceClass *dc = DEVICE_GET_CLASS(dev); 236 237 if (!dc->hotpluggable) { 238 return; 239 } 240 241 mdev = acpi_memory_slot_status(mem_st, dev, errp); 242 if (!mdev) { 243 return; 244 } 245 246 mdev->dimm = dev; 247 mdev->is_enabled = true; 248 if (dev->hotplugged) { 249 mdev->is_inserting = true; 250 251 /* do ACPI magic */ 252 acpi_send_gpe_event(ar, irq, ACPI_MEMORY_HOTPLUG_STATUS); 253 } 254 } 255 256 void acpi_memory_unplug_request_cb(ACPIREGS *ar, qemu_irq irq, 257 MemHotplugState *mem_st, 258 DeviceState *dev, Error **errp) 259 { 260 MemStatus *mdev; 261 262 mdev = acpi_memory_slot_status(mem_st, dev, errp); 263 if (!mdev) { 264 return; 265 } 266 267 mdev->is_removing = true; 268 269 /* Do ACPI magic */ 270 acpi_send_gpe_event(ar, irq, ACPI_MEMORY_HOTPLUG_STATUS); 271 } 272 273 void acpi_memory_unplug_cb(MemHotplugState *mem_st, 274 DeviceState *dev, Error **errp) 275 { 276 MemStatus *mdev; 277 278 mdev = acpi_memory_slot_status(mem_st, dev, errp); 279 if (!mdev) { 280 return; 281 } 282 283 mdev->is_enabled = false; 284 mdev->dimm = NULL; 285 } 286 287 static const VMStateDescription vmstate_memhp_sts = { 288 .name = "memory hotplug device state", 289 .version_id = 1, 290 .minimum_version_id = 1, 291 .minimum_version_id_old = 1, 292 .fields = (VMStateField[]) { 293 VMSTATE_BOOL(is_enabled, MemStatus), 294 VMSTATE_BOOL(is_inserting, MemStatus), 295 VMSTATE_UINT32(ost_event, MemStatus), 296 VMSTATE_UINT32(ost_status, MemStatus), 297 VMSTATE_END_OF_LIST() 298 } 299 }; 300 301 const VMStateDescription vmstate_memory_hotplug = { 302 .name = "memory hotplug state", 303 .version_id = 1, 304 .minimum_version_id = 1, 305 .minimum_version_id_old = 1, 306 .fields = (VMStateField[]) { 307 VMSTATE_UINT32(selector, MemHotplugState), 308 VMSTATE_STRUCT_VARRAY_POINTER_UINT32(devs, MemHotplugState, dev_count, 309 vmstate_memhp_sts, MemStatus), 310 VMSTATE_END_OF_LIST() 311 } 312 }; 313