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 break; 159 } 160 trace_mhp_acpi_pc_dimm_deleted(mem_st->selector); 161 } 162 break; 163 default: 164 break; 165 } 166 167 } 168 static const MemoryRegionOps acpi_memory_hotplug_ops = { 169 .read = acpi_memory_hotplug_read, 170 .write = acpi_memory_hotplug_write, 171 .endianness = DEVICE_LITTLE_ENDIAN, 172 .valid = { 173 .min_access_size = 1, 174 .max_access_size = 4, 175 }, 176 }; 177 178 void acpi_memory_hotplug_init(MemoryRegion *as, Object *owner, 179 MemHotplugState *state) 180 { 181 MachineState *machine = MACHINE(qdev_get_machine()); 182 183 state->dev_count = machine->ram_slots; 184 if (!state->dev_count) { 185 return; 186 } 187 188 state->devs = g_malloc0(sizeof(*state->devs) * state->dev_count); 189 memory_region_init_io(&state->io, owner, &acpi_memory_hotplug_ops, state, 190 "acpi-mem-hotplug", ACPI_MEMORY_HOTPLUG_IO_LEN); 191 memory_region_add_subregion(as, ACPI_MEMORY_HOTPLUG_BASE, &state->io); 192 } 193 194 /** 195 * acpi_memory_slot_status: 196 * @mem_st: memory hotplug state 197 * @dev: device 198 * @errp: set in case of an error 199 * 200 * Obtain a single memory slot status. 201 * 202 * This function will be called by memory unplug request cb and unplug cb. 203 */ 204 static MemStatus * 205 acpi_memory_slot_status(MemHotplugState *mem_st, 206 DeviceState *dev, Error **errp) 207 { 208 Error *local_err = NULL; 209 int slot = object_property_get_int(OBJECT(dev), PC_DIMM_SLOT_PROP, 210 &local_err); 211 212 if (local_err) { 213 error_propagate(errp, local_err); 214 return NULL; 215 } 216 217 if (slot >= mem_st->dev_count) { 218 char *dev_path = object_get_canonical_path(OBJECT(dev)); 219 error_setg(errp, "acpi_memory_slot_status: " 220 "device [%s] returned invalid memory slot[%d]", 221 dev_path, slot); 222 g_free(dev_path); 223 return NULL; 224 } 225 226 return &mem_st->devs[slot]; 227 } 228 229 void acpi_memory_plug_cb(ACPIREGS *ar, qemu_irq irq, MemHotplugState *mem_st, 230 DeviceState *dev, Error **errp) 231 { 232 MemStatus *mdev; 233 234 mdev = acpi_memory_slot_status(mem_st, dev, errp); 235 if (!mdev) { 236 return; 237 } 238 239 mdev->dimm = dev; 240 mdev->is_enabled = true; 241 mdev->is_inserting = true; 242 243 /* do ACPI magic */ 244 acpi_send_gpe_event(ar, irq, ACPI_MEMORY_HOTPLUG_STATUS); 245 return; 246 } 247 248 void acpi_memory_unplug_request_cb(ACPIREGS *ar, qemu_irq irq, 249 MemHotplugState *mem_st, 250 DeviceState *dev, Error **errp) 251 { 252 MemStatus *mdev; 253 254 mdev = acpi_memory_slot_status(mem_st, dev, errp); 255 if (!mdev) { 256 return; 257 } 258 259 mdev->is_removing = true; 260 261 /* Do ACPI magic */ 262 acpi_send_gpe_event(ar, irq, ACPI_MEMORY_HOTPLUG_STATUS); 263 } 264 265 void acpi_memory_unplug_cb(MemHotplugState *mem_st, 266 DeviceState *dev, Error **errp) 267 { 268 MemStatus *mdev; 269 270 mdev = acpi_memory_slot_status(mem_st, dev, errp); 271 if (!mdev) { 272 return; 273 } 274 275 mdev->is_enabled = false; 276 mdev->dimm = NULL; 277 } 278 279 static const VMStateDescription vmstate_memhp_sts = { 280 .name = "memory hotplug device state", 281 .version_id = 1, 282 .minimum_version_id = 1, 283 .minimum_version_id_old = 1, 284 .fields = (VMStateField[]) { 285 VMSTATE_BOOL(is_enabled, MemStatus), 286 VMSTATE_BOOL(is_inserting, MemStatus), 287 VMSTATE_UINT32(ost_event, MemStatus), 288 VMSTATE_UINT32(ost_status, MemStatus), 289 VMSTATE_END_OF_LIST() 290 } 291 }; 292 293 const VMStateDescription vmstate_memory_hotplug = { 294 .name = "memory hotplug state", 295 .version_id = 1, 296 .minimum_version_id = 1, 297 .minimum_version_id_old = 1, 298 .fields = (VMStateField[]) { 299 VMSTATE_UINT32(selector, MemHotplugState), 300 VMSTATE_STRUCT_VARRAY_POINTER_UINT32(devs, MemHotplugState, dev_count, 301 vmstate_memhp_sts, MemStatus), 302 VMSTATE_END_OF_LIST() 303 } 304 }; 305