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