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