static gint pc_dimm_addr_sort(gconstpointer a, gconstpointer b)
{
PCDIMMDevice *x = PC_DIMM(a);
PCDIMMDevice *y = PC_DIMM(b);
Int128 diff = int128_sub(int128_make64(x->addr), int128_make64(y->addr));
if (int128_lt(diff, int128_zero())) {
return -1;
} else if (int128_gt(diff, int128_zero())) {
return 1;
}
return 0;
}
static void pc_dimm_realize(DeviceState *dev, Error **errp)
{
PCDIMMDevice *dimm = PC_DIMM(dev);
PCDIMMDeviceClass *ddc = PC_DIMM_GET_CLASS(dimm);
if (!dimm->hostmem) {
error_setg(errp, "'" PC_DIMM_MEMDEV_PROP "' property is not set");
return;
} else if (host_memory_backend_is_mapped(dimm->hostmem)) {
char *path = object_get_canonical_path_component(OBJECT(dimm->hostmem));
error_setg(errp, "can't use already busy memdev: %s", path);
g_free(path);
return;
}
if (((nb_numa_nodes > 0) && (dimm->node >= nb_numa_nodes)) ||
(!nb_numa_nodes && dimm->node)) {
error_setg(errp, "'DIMM property " PC_DIMM_NODE_PROP " has value %"
PRIu32 "' which exceeds the number of numa nodes: %d",
dimm->node, nb_numa_nodes ? nb_numa_nodes : 1);
return;
}
if (ddc->realize) {
ddc->realize(dimm, errp);
}
host_memory_backend_set_mapped(dimm->hostmem, true);
}
static void pc_dimm_md_fill_device_info(const MemoryDeviceState *md,
MemoryDeviceInfo *info)
{
PCDIMMDeviceInfo *di = g_new0(PCDIMMDeviceInfo, 1);
const DeviceClass *dc = DEVICE_GET_CLASS(md);
const PCDIMMDevice *dimm = PC_DIMM(md);
const DeviceState *dev = DEVICE(md);
if (dev->id) {
di->has_id = true;
di->id = g_strdup(dev->id);
}
di->hotplugged = dev->hotplugged;
di->hotpluggable = dc->hotpluggable;
di->addr = dimm->addr;
di->slot = dimm->slot;
di->node = dimm->node;
di->size = object_property_get_uint(OBJECT(dimm), PC_DIMM_SIZE_PROP,
NULL);
di->memdev = object_get_canonical_path(OBJECT(dimm->hostmem));
if (object_dynamic_cast(OBJECT(dev), TYPE_NVDIMM)) {
info->u.nvdimm.data = di;
info->type = MEMORY_DEVICE_INFO_KIND_NVDIMM;
} else {
info->u.dimm.data = di;
info->type = MEMORY_DEVICE_INFO_KIND_DIMM;
}
}
static void pc_dimm_realize(DeviceState *dev, Error **errp)
{
PCDIMMDevice *dimm = PC_DIMM(dev);
if (!dimm->hostmem) {
error_setg(errp, "'" PC_DIMM_MEMDEV_PROP "' property is not set");
return;
}
}
void pc_dimm_memory_unplug(DeviceState *dev, MemoryHotplugState *hpms,
MemoryRegion *mr)
{
PCDIMMDevice *dimm = PC_DIMM(dev);
numa_unset_mem_node_id(dimm->addr, memory_region_size(mr), dimm->node);
memory_region_del_subregion(&hpms->mr, mr);
vmstate_unregister_ram(mr, dev);
}
void pc_dimm_unplug(DeviceState *dev, MachineState *machine)
{
PCDIMMDevice *dimm = PC_DIMM(dev);
PCDIMMDeviceClass *ddc = PC_DIMM_GET_CLASS(dimm);
MemoryRegion *vmstate_mr = ddc->get_vmstate_memory_region(dimm,
&error_abort);
MemoryRegion *mr = ddc->get_memory_region(dimm, &error_abort);
memory_device_unplug_region(machine, mr);
vmstate_unregister_ram(vmstate_mr, dev);
}
void pc_dimm_memory_unplug(DeviceState *dev, MemoryHotplugState *hpms,
MemoryRegion *mr)
{
PCDIMMDevice *dimm = PC_DIMM(dev);
PCDIMMDeviceClass *ddc = PC_DIMM_GET_CLASS(dimm);
MemoryRegion *vmstate_mr = ddc->get_vmstate_memory_region(dimm);
numa_unset_mem_node_id(dimm->addr, memory_region_size(mr), dimm->node);
memory_region_del_subregion(&hpms->mr, mr);
vmstate_unregister_ram(vmstate_mr, dev);
}
static void pc_dimm_init(Object *obj)
{
PCDIMMDevice *dimm = PC_DIMM(obj);
object_property_add(obj, PC_DIMM_SIZE_PROP, "int", pc_dimm_get_size,
NULL, NULL, NULL, &error_abort);
object_property_add_link(obj, PC_DIMM_MEMDEV_PROP, TYPE_MEMORY_BACKEND,
(Object **)&dimm->hostmem,
pc_dimm_check_memdev_is_busy,
OBJ_PROP_LINK_UNREF_ON_RELEASE,
&error_abort);
}
static void pc_dimm_get_size(Object *obj, Visitor *v, void *opaque,
const char *name, Error **errp)
{
int64_t value;
MemoryRegion *mr;
PCDIMMDevice *dimm = PC_DIMM(obj);
mr = host_memory_backend_get_memory(dimm->hostmem, errp);
value = memory_region_size(mr);
visit_type_int(v, &value, name, errp);
}
void pc_dimm_plug(DeviceState *dev, MachineState *machine, uint64_t align,
Error **errp)
{
int slot;
PCDIMMDevice *dimm = PC_DIMM(dev);
PCDIMMDeviceClass *ddc = PC_DIMM_GET_CLASS(dimm);
MemoryRegion *vmstate_mr = ddc->get_vmstate_memory_region(dimm,
&error_abort);
MemoryRegion *mr = ddc->get_memory_region(dimm, &error_abort);
Error *local_err = NULL;
uint64_t addr;
addr = object_property_get_uint(OBJECT(dimm),
PC_DIMM_ADDR_PROP, &local_err);
if (local_err) {
goto out;
}
addr = memory_device_get_free_addr(machine, !addr ? NULL : &addr, align,
memory_region_size(mr), &local_err);
if (local_err) {
goto out;
}
object_property_set_uint(OBJECT(dev), addr, PC_DIMM_ADDR_PROP, &local_err);
if (local_err) {
goto out;
}
trace_mhp_pc_dimm_assigned_address(addr);
slot = object_property_get_int(OBJECT(dev), PC_DIMM_SLOT_PROP, &local_err);
if (local_err) {
goto out;
}
slot = pc_dimm_get_free_slot(slot == PC_DIMM_UNASSIGNED_SLOT ? NULL : &slot,
machine->ram_slots, &local_err);
if (local_err) {
goto out;
}
object_property_set_int(OBJECT(dev), slot, PC_DIMM_SLOT_PROP, &local_err);
if (local_err) {
goto out;
}
trace_mhp_pc_dimm_assigned_slot(slot);
memory_device_plug_region(machine, mr, addr);
vmstate_register_ram(vmstate_mr, dev);
out:
error_propagate(errp, local_err);
}
static void pc_dimm_get_size(Object *obj, Visitor *v, const char *name,
void *opaque, Error **errp)
{
int64_t value;
MemoryRegion *mr;
PCDIMMDevice *dimm = PC_DIMM(obj);
PCDIMMDeviceClass *ddc = PC_DIMM_GET_CLASS(obj);
mr = ddc->get_memory_region(dimm);
value = memory_region_size(mr);
visit_type_int(v, name, &value, errp);
}
static uint64_t pc_dimm_md_get_region_size(const MemoryDeviceState *md)
{
/* dropping const here is fine as we don't touch the memory region */
PCDIMMDevice *dimm = PC_DIMM(md);
const PCDIMMDeviceClass *ddc = PC_DIMM_GET_CLASS(md);
MemoryRegion *mr;
mr = ddc->get_memory_region(dimm, &error_abort);
if (!mr) {
return 0;
}
return memory_region_size(mr);
}
static void pc_dimm_realize(DeviceState *dev, Error **errp)
{
PCDIMMDevice *dimm = PC_DIMM(dev);
if (!dimm->hostmem) {
error_setg(errp, "'" PC_DIMM_MEMDEV_PROP "' property is not set");
return;
}
if ((nb_numa_nodes > 0) && (dimm->node >= nb_numa_nodes)) {
error_setg(errp, "'DIMM property " PC_DIMM_NODE_PROP " has value %"
PRIu32 "' which exceeds the number of numa nodes: %d",
dimm->node, nb_numa_nodes);
return;
}
}
static void nvdimm_write_label_data(NVDIMMDevice *nvdimm, const void *buf,
uint64_t size, uint64_t offset)
{
MemoryRegion *mr;
PCDIMMDevice *dimm = PC_DIMM(nvdimm);
uint64_t backend_offset;
nvdimm_validate_rw_label_data(nvdimm, size, offset);
memcpy(nvdimm->label_data + offset, buf, size);
mr = host_memory_backend_get_memory(dimm->hostmem, &error_abort);
backend_offset = memory_region_size(mr) - nvdimm->label_size + offset;
memory_region_set_dirty(mr, backend_offset, size);
}
static int pc_dimm_slot2bitmap(Object *obj, void *opaque)
{
unsigned long *bitmap = opaque;
if (object_dynamic_cast(obj, TYPE_PC_DIMM)) {
DeviceState *dev = DEVICE(obj);
if (dev->realized) { /* count only realized DIMMs */
PCDIMMDevice *d = PC_DIMM(obj);
set_bit(d->slot, bitmap);
}
}
object_child_foreach(obj, pc_dimm_slot2bitmap, opaque);
return 0;
}
int qmp_pc_dimm_device_list(Object *obj, void *opaque)
{
MemoryDeviceInfoList ***prev = opaque;
if (object_dynamic_cast(obj, TYPE_PC_DIMM)) {
DeviceState *dev = DEVICE(obj);
if (dev->realized) {
MemoryDeviceInfoList *elem = g_new0(MemoryDeviceInfoList, 1);
MemoryDeviceInfo *info = g_new0(MemoryDeviceInfo, 1);
PCDIMMDeviceInfo *di = g_new0(PCDIMMDeviceInfo, 1);
DeviceClass *dc = DEVICE_GET_CLASS(obj);
PCDIMMDevice *dimm = PC_DIMM(obj);
if (dev->id) {
di->has_id = true;
di->id = g_strdup(dev->id);
}
di->hotplugged = dev->hotplugged;
di->hotpluggable = dc->hotpluggable;
di->addr = dimm->addr;
di->slot = dimm->slot;
di->node = dimm->node;
di->size = object_property_get_uint(OBJECT(dimm), PC_DIMM_SIZE_PROP,
NULL);
di->memdev = object_get_canonical_path(OBJECT(dimm->hostmem));
info->u.dimm.data = di;
elem->value = info;
elem->next = NULL;
**prev = elem;
*prev = &elem->next;
}
}
object_child_foreach(obj, qmp_pc_dimm_device_list, opaque);
return 0;
}
static void pc_dimm_realize(DeviceState *dev, Error **errp)
{
PCDIMMDevice *dimm = PC_DIMM(dev);
PCDIMMDeviceClass *ddc = PC_DIMM_GET_CLASS(dimm);
if (!dimm->hostmem) {
error_setg(errp, "'" PC_DIMM_MEMDEV_PROP "' property is not set");
return;
}
if (((nb_numa_nodes > 0) && (dimm->node >= nb_numa_nodes)) ||
(!nb_numa_nodes && dimm->node)) {
error_setg(errp, "'DIMM property " PC_DIMM_NODE_PROP " has value %"
PRIu32 "' which exceeds the number of numa nodes: %d",
dimm->node, nb_numa_nodes ? nb_numa_nodes : 1);
return;
}
if (ddc->realize) {
ddc->realize(dimm, errp);
}
host_memory_backend_set_mapped(dimm->hostmem, true);
}
static void pc_dimm_unrealize(DeviceState *dev, Error **errp)
{
PCDIMMDevice *dimm = PC_DIMM(dev);
host_memory_backend_set_mapped(dimm->hostmem, false);
}
void pc_dimm_memory_plug(DeviceState *dev, MemoryHotplugState *hpms,
MemoryRegion *mr, uint64_t align, Error **errp)
{
int slot;
MachineState *machine = MACHINE(qdev_get_machine());
PCDIMMDevice *dimm = PC_DIMM(dev);
PCDIMMDeviceClass *ddc = PC_DIMM_GET_CLASS(dimm);
MemoryRegion *vmstate_mr = ddc->get_vmstate_memory_region(dimm);
Error *local_err = NULL;
uint64_t existing_dimms_capacity = 0;
uint64_t addr;
addr = object_property_get_uint(OBJECT(dimm),
PC_DIMM_ADDR_PROP, &local_err);
if (local_err) {
goto out;
}
addr = pc_dimm_get_free_addr(hpms->base,
memory_region_size(&hpms->mr),
!addr ? NULL : &addr, align,
memory_region_size(mr), &local_err);
if (local_err) {
goto out;
}
existing_dimms_capacity = pc_existing_dimms_capacity(&local_err);
if (local_err) {
goto out;
}
if (existing_dimms_capacity + memory_region_size(mr) >
machine->maxram_size - machine->ram_size) {
error_setg(&local_err, "not enough space, currently 0x%" PRIx64
" in use of total hot pluggable 0x" RAM_ADDR_FMT,
existing_dimms_capacity,
machine->maxram_size - machine->ram_size);
goto out;
}
object_property_set_uint(OBJECT(dev), addr, PC_DIMM_ADDR_PROP, &local_err);
if (local_err) {
goto out;
}
trace_mhp_pc_dimm_assigned_address(addr);
slot = object_property_get_int(OBJECT(dev), PC_DIMM_SLOT_PROP, &local_err);
if (local_err) {
goto out;
}
slot = pc_dimm_get_free_slot(slot == PC_DIMM_UNASSIGNED_SLOT ? NULL : &slot,
machine->ram_slots, &local_err);
if (local_err) {
goto out;
}
object_property_set_int(OBJECT(dev), slot, PC_DIMM_SLOT_PROP, &local_err);
if (local_err) {
goto out;
}
trace_mhp_pc_dimm_assigned_slot(slot);
if (kvm_enabled() && !kvm_has_free_slot(machine)) {
error_setg(&local_err, "hypervisor has no free memory slots left");
goto out;
}
if (!vhost_has_free_slot()) {
error_setg(&local_err, "a used vhost backend has no free"
" memory slots left");
goto out;
}
memory_region_add_subregion(&hpms->mr, addr - hpms->base, mr);
vmstate_register_ram(vmstate_mr, dev);
numa_set_mem_node_id(addr, memory_region_size(mr), dimm->node);
out:
error_propagate(errp, local_err);
}
static uint64_t pc_dimm_md_get_addr(const MemoryDeviceState *md)
{
const PCDIMMDevice *dimm = PC_DIMM(md);
return dimm->addr;
}
