hw/acpi/memory_hotplug.c

   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         trace_mhp_acpi_read_flags(mem_st->selector, val);
  79         break;
  80     default:
  81         val = ~0;
  82         break;
  83     }
  84     return val;
  85 }
  86
  87 static void acpi_memory_hotplug_write(void *opaque, hwaddr addr, uint64_t data,
  88                                       unsigned int size)
  89 {
  90     MemHotplugState *mem_st = opaque;
  91     MemStatus *mdev;
  92     ACPIOSTInfo *info;
  93
  94     if (!mem_st->dev_count) {
  95         return;
  96     }
  97
  98     if (addr) {
  99         if (mem_st->selector >= mem_st->dev_count) {
 100             trace_mhp_acpi_invalid_slot_selected(mem_st->selector);
 101             return;
 102         }
 103     }
 104
 105     switch (addr) {
 106     case 0x0: /* DIMM slot selector */
 107         mem_st->selector = data;
 108         trace_mhp_acpi_write_slot(mem_st->selector);
 109         break;
 110     case 0x4: /* _OST event  */
 111         mdev = &mem_st->devs[mem_st->selector];
 112         if (data == 1) {
 113             /* TODO: handle device insert OST event */
 114         } else if (data == 3) {
 115             /* TODO: handle device remove OST event */
 116         }
 117         mdev->ost_event = data;
 118         trace_mhp_acpi_write_ost_ev(mem_st->selector, mdev->ost_event);
 119         break;
 120     case 0x8: /* _OST status */
 121         mdev = &mem_st->devs[mem_st->selector];
 122         mdev->ost_status = data;
 123         trace_mhp_acpi_write_ost_status(mem_st->selector, mdev->ost_status);
 124         /* TODO: implement memory removal on guest signal */
 125
 126         info = acpi_memory_device_status(mem_st->selector, mdev);
 127         qapi_event_send_acpi_device_ost(info, &error_abort);
 128         qapi_free_ACPIOSTInfo(info);
 129         break;
 130     case 0x14:
 131         mdev = &mem_st->devs[mem_st->selector];
 132         if (data & 2) { /* clear insert event */
 133             mdev->is_inserting  = false;
 134             trace_mhp_acpi_clear_insert_evt(mem_st->selector);
 135         }
 136         break;
 137     }
 138
 139 }
 140 static const MemoryRegionOps acpi_memory_hotplug_ops = {
 141     .read = acpi_memory_hotplug_read,
 142     .write = acpi_memory_hotplug_write,
 143     .endianness = DEVICE_LITTLE_ENDIAN,
 144     .valid = {
 145         .min_access_size = 1,
 146         .max_access_size = 4,
 147     },
 148 };
 149
 150 void acpi_memory_hotplug_init(MemoryRegion *as, Object *owner,
 151                               MemHotplugState *state)
 152 {
 153     MachineState *machine = MACHINE(qdev_get_machine());
 154
 155     state->dev_count = machine->ram_slots;
 156     if (!state->dev_count) {
 157         return;
 158     }
 159
 160     state->devs = g_malloc0(sizeof(*state->devs) * state->dev_count);
 161     memory_region_init_io(&state->io, owner, &acpi_memory_hotplug_ops, state,
 162                           "acpi-mem-hotplug", ACPI_MEMORY_HOTPLUG_IO_LEN);
 163     memory_region_add_subregion(as, ACPI_MEMORY_HOTPLUG_BASE, &state->io);
 164 }
 165
 166 void acpi_memory_plug_cb(ACPIREGS *ar, qemu_irq irq, MemHotplugState *mem_st,
 167                          DeviceState *dev, Error **errp)
 168 {
 169     MemStatus *mdev;
 170     Error *local_err = NULL;
 171     int slot = object_property_get_int(OBJECT(dev), PC_DIMM_SLOT_PROP,
 172                                        &local_err);
 173
 174     if (local_err) {
 175         error_propagate(errp, local_err);
 176         return;
 177     }
 178
 179     if (slot >= mem_st->dev_count) {
 180         char *dev_path = object_get_canonical_path(OBJECT(dev));
 181         error_setg(errp, "acpi_memory_plug_cb: "
 182                    "device [%s] returned invalid memory slot[%d]",
 183                     dev_path, slot);
 184         g_free(dev_path);
 185         return;
 186     }
 187
 188     mdev = &mem_st->devs[slot];
 189     mdev->dimm = dev;
 190     mdev->is_enabled = true;
 191     mdev->is_inserting = true;
 192
 193     /* do ACPI magic */
 194     ar->gpe.sts[0] |= ACPI_MEMORY_HOTPLUG_STATUS;
 195     acpi_update_sci(ar, irq);
 196     return;
 197 }
 198
 199 static const VMStateDescription vmstate_memhp_sts = {
 200     .name = "memory hotplug device state",
 201     .version_id = 1,
 202     .minimum_version_id = 1,
 203     .minimum_version_id_old = 1,
 204     .fields      = (VMStateField[]) {
 205         VMSTATE_BOOL(is_enabled, MemStatus),
 206         VMSTATE_BOOL(is_inserting, MemStatus),
 207         VMSTATE_UINT32(ost_event, MemStatus),
 208         VMSTATE_UINT32(ost_status, MemStatus),
 209         VMSTATE_END_OF_LIST()
 210     }
 211 };
 212
 213 const VMStateDescription vmstate_memory_hotplug = {
 214     .name = "memory hotplug state",
 215     .version_id = 1,
 216     .minimum_version_id = 1,
 217     .minimum_version_id_old = 1,
 218     .fields      = (VMStateField[]) {
 219         VMSTATE_UINT32(selector, MemHotplugState),
 220         VMSTATE_STRUCT_VARRAY_POINTER_UINT32(devs, MemHotplugState, dev_count,
 221                                              vmstate_memhp_sts, MemStatus),
 222         VMSTATE_END_OF_LIST()
 223     }
 224 };