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 98 if (!mem_st->dev_count) { 99 return; 100 } 101 102 if (addr) { 103 if (mem_st->selector >= mem_st->dev_count) { 104 trace_mhp_acpi_invalid_slot_selected(mem_st->selector); 105 return; 106 } 107 } 108 109 switch (addr) { 110 case 0x0: /* DIMM slot selector */ 111 mem_st->selector = data; 112 trace_mhp_acpi_write_slot(mem_st->selector); 113 break; 114 case 0x4: /* _OST event */ 115 mdev = &mem_st->devs[mem_st->selector]; 116 if (data == 1) { 117 /* TODO: handle device insert OST event */ 118 } else if (data == 3) { 119 /* TODO: handle device remove OST event */ 120 } 121 mdev->ost_event = data; 122 trace_mhp_acpi_write_ost_ev(mem_st->selector, mdev->ost_event); 123 break; 124 case 0x8: /* _OST status */ 125 mdev = &mem_st->devs[mem_st->selector]; 126 mdev->ost_status = data; 127 trace_mhp_acpi_write_ost_status(mem_st->selector, mdev->ost_status); 128 /* TODO: implement memory removal on guest signal */ 129 130 info = acpi_memory_device_status(mem_st->selector, mdev); 131 qapi_event_send_acpi_device_ost(info, &error_abort); 132 qapi_free_ACPIOSTInfo(info); 133 break; 134 case 0x14: /* set is_* fields */ 135 mdev = &mem_st->devs[mem_st->selector]; 136 if (data & 2) { /* clear insert event */ 137 mdev->is_inserting = false; 138 trace_mhp_acpi_clear_insert_evt(mem_st->selector); 139 } else if (data & 4) { 140 mdev->is_removing = false; 141 trace_mhp_acpi_clear_remove_evt(mem_st->selector); 142 } else if (data & 8) { 143 if (!mdev->is_enabled) { 144 trace_mhp_acpi_ejecting_invalid_slot(mem_st->selector); 145 break; 146 } 147 148 dev = DEVICE(mdev->dimm); 149 hotplug_ctrl = qdev_get_hotplug_handler(dev); 150 /* call pc-dimm unplug cb */ 151 hotplug_handler_unplug(hotplug_ctrl, dev, NULL); 152 trace_mhp_acpi_pc_dimm_deleted(mem_st->selector); 153 } 154 break; 155 default: 156 break; 157 } 158 159 } 160 static const MemoryRegionOps acpi_memory_hotplug_ops = { 161 .read = acpi_memory_hotplug_read, 162 .write = acpi_memory_hotplug_write, 163 .endianness = DEVICE_LITTLE_ENDIAN, 164 .valid = { 165 .min_access_size = 1, 166 .max_access_size = 4, 167 }, 168 }; 169 170 void acpi_memory_hotplug_init(MemoryRegion *as, Object *owner, 171 MemHotplugState *state) 172 { 173 MachineState *machine = MACHINE(qdev_get_machine()); 174 175 state->dev_count = machine->ram_slots; 176 if (!state->dev_count) { 177 return; 178 } 179 180 state->devs = g_malloc0(sizeof(*state->devs) * state->dev_count); 181 memory_region_init_io(&state->io, owner, &acpi_memory_hotplug_ops, state, 182 "acpi-mem-hotplug", ACPI_MEMORY_HOTPLUG_IO_LEN); 183 memory_region_add_subregion(as, ACPI_MEMORY_HOTPLUG_BASE, &state->io); 184 } 185 186 /** 187 * acpi_memory_slot_status: 188 * @mem_st: memory hotplug state 189 * @dev: device 190 * @errp: set in case of an error 191 * 192 * Obtain a single memory slot status. 193 * 194 * This function will be called by memory unplug request cb and unplug cb. 195 */ 196 static MemStatus * 197 acpi_memory_slot_status(MemHotplugState *mem_st, 198 DeviceState *dev, Error **errp) 199 { 200 Error *local_err = NULL; 201 int slot = object_property_get_int(OBJECT(dev), PC_DIMM_SLOT_PROP, 202 &local_err); 203 204 if (local_err) { 205 error_propagate(errp, local_err); 206 return NULL; 207 } 208 209 if (slot >= mem_st->dev_count) { 210 char *dev_path = object_get_canonical_path(OBJECT(dev)); 211 error_setg(errp, "acpi_memory_slot_status: " 212 "device [%s] returned invalid memory slot[%d]", 213 dev_path, slot); 214 g_free(dev_path); 215 return NULL; 216 } 217 218 return &mem_st->devs[slot]; 219 } 220 221 void acpi_memory_plug_cb(ACPIREGS *ar, qemu_irq irq, MemHotplugState *mem_st, 222 DeviceState *dev, Error **errp) 223 { 224 MemStatus *mdev; 225 226 mdev = acpi_memory_slot_status(mem_st, dev, errp); 227 if (!mdev) { 228 return; 229 } 230 231 mdev->dimm = dev; 232 mdev->is_enabled = true; 233 mdev->is_inserting = true; 234 235 /* do ACPI magic */ 236 ar->gpe.sts[0] |= ACPI_MEMORY_HOTPLUG_STATUS; 237 acpi_update_sci(ar, irq); 238 return; 239 } 240 241 void acpi_memory_unplug_request_cb(ACPIREGS *ar, qemu_irq irq, 242 MemHotplugState *mem_st, 243 DeviceState *dev, Error **errp) 244 { 245 MemStatus *mdev; 246 247 mdev = acpi_memory_slot_status(mem_st, dev, errp); 248 if (!mdev) { 249 return; 250 } 251 252 mdev->is_removing = true; 253 254 /* Do ACPI magic */ 255 ar->gpe.sts[0] |= ACPI_MEMORY_HOTPLUG_STATUS; 256 acpi_update_sci(ar, irq); 257 } 258 259 void acpi_memory_unplug_cb(MemHotplugState *mem_st, 260 DeviceState *dev, Error **errp) 261 { 262 MemStatus *mdev; 263 264 mdev = acpi_memory_slot_status(mem_st, dev, errp); 265 if (!mdev) { 266 return; 267 } 268 269 mdev->is_enabled = false; 270 mdev->dimm = NULL; 271 } 272 273 static const VMStateDescription vmstate_memhp_sts = { 274 .name = "memory hotplug device state", 275 .version_id = 1, 276 .minimum_version_id = 1, 277 .minimum_version_id_old = 1, 278 .fields = (VMStateField[]) { 279 VMSTATE_BOOL(is_enabled, MemStatus), 280 VMSTATE_BOOL(is_inserting, MemStatus), 281 VMSTATE_UINT32(ost_event, MemStatus), 282 VMSTATE_UINT32(ost_status, MemStatus), 283 VMSTATE_END_OF_LIST() 284 } 285 }; 286 287 const VMStateDescription vmstate_memory_hotplug = { 288 .name = "memory hotplug state", 289 .version_id = 1, 290 .minimum_version_id = 1, 291 .minimum_version_id_old = 1, 292 .fields = (VMStateField[]) { 293 VMSTATE_UINT32(selector, MemHotplugState), 294 VMSTATE_STRUCT_VARRAY_POINTER_UINT32(devs, MemHotplugState, dev_count, 295 vmstate_memhp_sts, MemStatus), 296 VMSTATE_END_OF_LIST() 297 } 298 }; 299