HotpluggableCPUList *machine_query_hotpluggable_cpus(MachineState *machine)
{
int i;
HotpluggableCPUList *head = NULL;
MachineClass *mc = MACHINE_GET_CLASS(machine);
/* force board to initialize possible_cpus if it hasn't been done yet */
mc->possible_cpu_arch_ids(machine);
for (i = 0; i < machine->possible_cpus->len; i++) {
Object *cpu;
HotpluggableCPUList *list_item = g_new0(typeof(*list_item), 1);
HotpluggableCPU *cpu_item = g_new0(typeof(*cpu_item), 1);
cpu_item->type = g_strdup(machine->possible_cpus->cpus[i].type);
cpu_item->vcpus_count = machine->possible_cpus->cpus[i].vcpus_count;
cpu_item->props = g_memdup(&machine->possible_cpus->cpus[i].props,
sizeof(*cpu_item->props));
cpu = machine->possible_cpus->cpus[i].cpu;
if (cpu) {
cpu_item->has_qom_path = true;
cpu_item->qom_path = object_get_canonical_path(cpu);
}
list_item->value = cpu_item;
list_item->next = head;
head = list_item;
}
return head;
}
static void machine_numa_finish_init(MachineState *machine)
{
int i;
bool default_mapping;
GString *s = g_string_new(NULL);
MachineClass *mc = MACHINE_GET_CLASS(machine);
const CPUArchIdList *possible_cpus = mc->possible_cpu_arch_ids(machine);
assert(nb_numa_nodes);
for (i = 0; i < possible_cpus->len; i++) {
if (possible_cpus->cpus[i].props.has_node_id) {
break;
}
}
default_mapping = (i == possible_cpus->len);
for (i = 0; i < possible_cpus->len; i++) {
const CPUArchId *cpu_slot = &possible_cpus->cpus[i];
if (!cpu_slot->props.has_node_id) {
/* fetch default mapping from board and enable it */
CpuInstanceProperties props = cpu_slot->props;
props.node_id = mc->get_default_cpu_node_id(machine, i);
if (!default_mapping) {
/* record slots with not set mapping,
* TODO: make it hard error in future */
char *cpu_str = cpu_slot_to_string(cpu_slot);
g_string_append_printf(s, "%sCPU %d [%s]",
s->len ? ", " : "", i, cpu_str);
g_free(cpu_str);
/* non mapped cpus used to fallback to node 0 */
props.node_id = 0;
}
props.has_node_id = true;
machine_set_cpu_numa_node(machine, &props, &error_fatal);
}
}
if (s->len && !qtest_enabled()) {
warn_report("CPU(s) not present in any NUMA nodes: %s",
s->str);
warn_report("All CPU(s) up to maxcpus should be described "
"in NUMA config, ability to start up with partial NUMA "
"mappings is obsoleted and will be removed in future");
}
g_string_free(s, true);
}
void cpu_hotplug_hw_init(MemoryRegion *as, Object *owner,
CPUHotplugState *state, hwaddr base_addr)
{
MachineState *machine = MACHINE(qdev_get_machine());
MachineClass *mc = MACHINE_GET_CLASS(machine);
const CPUArchIdList *id_list;
int i;
assert(mc->possible_cpu_arch_ids);
id_list = mc->possible_cpu_arch_ids(machine);
state->dev_count = id_list->len;
state->devs = g_new0(typeof(*state->devs), state->dev_count);
for (i = 0; i < id_list->len; i++) {
state->devs[i].cpu = CPU(id_list->cpus[i].cpu);
state->devs[i].arch_id = id_list->cpus[i].arch_id;
}
memory_region_init_io(&state->ctrl_reg, owner, &cpu_hotplug_ops, state,
"acpi-mem-hotplug", ACPI_CPU_HOTPLUG_REG_LEN);
memory_region_add_subregion(as, base_addr, &state->ctrl_reg);
}
/**
* machine_set_cpu_numa_node:
* @machine: machine object to modify
* @props: specifies which cpu objects to assign to
* numa node specified by @props.node_id
* @errp: if an error occurs, a pointer to an area to store the error
*
* Associate NUMA node specified by @props.node_id with cpu slots that
* match socket/core/thread-ids specified by @props. It's recommended to use
* query-hotpluggable-cpus.props values to specify affected cpu slots,
* which would lead to exact 1:1 mapping of cpu slots to NUMA node.
*
* However for CLI convenience it's possible to pass in subset of properties,
* which would affect all cpu slots that match it.
* Ex for pc machine:
* -smp 4,cores=2,sockets=2 -numa node,nodeid=0 -numa node,nodeid=1 \
* -numa cpu,node-id=0,socket_id=0 \
* -numa cpu,node-id=1,socket_id=1
* will assign all child cores of socket 0 to node 0 and
* of socket 1 to node 1.
*
* On attempt of reassigning (already assigned) cpu slot to another NUMA node,
* return error.
* Empty subset is disallowed and function will return with error in this case.
*/
void machine_set_cpu_numa_node(MachineState *machine,
const CpuInstanceProperties *props, Error **errp)
{
MachineClass *mc = MACHINE_GET_CLASS(machine);
bool match = false;
int i;
if (!mc->possible_cpu_arch_ids) {
error_setg(errp, "mapping of CPUs to NUMA node is not supported");
return;
}
/* disabling node mapping is not supported, forbid it */
assert(props->has_node_id);
/* force board to initialize possible_cpus if it hasn't been done yet */
mc->possible_cpu_arch_ids(machine);
for (i = 0; i < machine->possible_cpus->len; i++) {
CPUArchId *slot = &machine->possible_cpus->cpus[i];
/* reject unsupported by board properties */
if (props->has_thread_id && !slot->props.has_thread_id) {
error_setg(errp, "thread-id is not supported");
return;
}
if (props->has_core_id && !slot->props.has_core_id) {
error_setg(errp, "core-id is not supported");
return;
}
if (props->has_socket_id && !slot->props.has_socket_id) {
error_setg(errp, "socket-id is not supported");
return;
}
/* skip slots with explicit mismatch */
if (props->has_thread_id && props->thread_id != slot->props.thread_id) {
continue;
}
if (props->has_core_id && props->core_id != slot->props.core_id) {
continue;
}
if (props->has_socket_id && props->socket_id != slot->props.socket_id) {
continue;
}
/* reject assignment if slot is already assigned, for compatibility
* of legacy cpu_index mapping with SPAPR core based mapping do not
* error out if cpu thread and matched core have the same node-id */
if (slot->props.has_node_id &&
slot->props.node_id != props->node_id) {
error_setg(errp, "CPU is already assigned to node-id: %" PRId64,
slot->props.node_id);
return;
}
/* assign slot to node as it's matched '-numa cpu' key */
match = true;
slot->props.node_id = props->node_id;
slot->props.has_node_id = props->has_node_id;
}
if (!match) {
error_setg(errp, "no match found");
}
}
void build_cpus_aml(Aml *table, MachineState *machine, CPUHotplugFeatures opts,
hwaddr io_base,
const char *res_root,
const char *event_handler_method)
{
Aml *ifctx;
Aml *field;
Aml *method;
Aml *cpu_ctrl_dev;
Aml *cpus_dev;
Aml *zero = aml_int(0);
Aml *one = aml_int(1);
Aml *sb_scope = aml_scope("_SB");
MachineClass *mc = MACHINE_GET_CLASS(machine);
const CPUArchIdList *arch_ids = mc->possible_cpu_arch_ids(machine);
char *cphp_res_path = g_strdup_printf("%s." CPUHP_RES_DEVICE, res_root);
Object *obj = object_resolve_path_type("", TYPE_ACPI_DEVICE_IF, NULL);
AcpiDeviceIfClass *adevc = ACPI_DEVICE_IF_GET_CLASS(obj);
AcpiDeviceIf *adev = ACPI_DEVICE_IF(obj);
cpu_ctrl_dev = aml_device("%s", cphp_res_path);
{
Aml *crs;
aml_append(cpu_ctrl_dev,
aml_name_decl("_HID", aml_eisaid("PNP0A06")));
aml_append(cpu_ctrl_dev,
aml_name_decl("_UID", aml_string("CPU Hotplug resources")));
aml_append(cpu_ctrl_dev, aml_mutex(CPU_LOCK, 0));
crs = aml_resource_template();
aml_append(crs, aml_io(AML_DECODE16, io_base, io_base, 1,
ACPI_CPU_HOTPLUG_REG_LEN));
aml_append(cpu_ctrl_dev, aml_name_decl("_CRS", crs));
/* declare CPU hotplug MMIO region with related access fields */
aml_append(cpu_ctrl_dev,
aml_operation_region("PRST", AML_SYSTEM_IO, aml_int(io_base),
ACPI_CPU_HOTPLUG_REG_LEN));
field = aml_field("PRST", AML_BYTE_ACC, AML_NOLOCK,
AML_WRITE_AS_ZEROS);
aml_append(field, aml_reserved_field(ACPI_CPU_FLAGS_OFFSET_RW * 8));
/* 1 if enabled, read only */
aml_append(field, aml_named_field(CPU_ENABLED, 1));
/* (read) 1 if has a insert event. (write) 1 to clear event */
aml_append(field, aml_named_field(CPU_INSERT_EVENT, 1));
/* (read) 1 if has a remove event. (write) 1 to clear event */
aml_append(field, aml_named_field(CPU_REMOVE_EVENT, 1));
/* initiates device eject, write only */
aml_append(field, aml_named_field(CPU_EJECT_EVENT, 1));
aml_append(field, aml_reserved_field(4));
aml_append(field, aml_named_field(CPU_COMMAND, 8));
aml_append(cpu_ctrl_dev, field);
field = aml_field("PRST", AML_DWORD_ACC, AML_NOLOCK, AML_PRESERVE);
/* CPU selector, write only */
aml_append(field, aml_named_field(CPU_SELECTOR, 32));
/* flags + cmd + 2byte align */
aml_append(field, aml_reserved_field(4 * 8));
aml_append(field, aml_named_field(CPU_DATA, 32));
aml_append(cpu_ctrl_dev, field);
if (opts.has_legacy_cphp) {
method = aml_method("_INI", 0, AML_SERIALIZED);
/* switch off legacy CPU hotplug HW and use new one,
* on reboot system is in new mode and writing 0
* in CPU_SELECTOR selects BSP, which is NOP at
* the time _INI is called */
aml_append(method, aml_store(zero, aml_name(CPU_SELECTOR)));
aml_append(cpu_ctrl_dev, method);
}
}
aml_append(sb_scope, cpu_ctrl_dev);
cpus_dev = aml_device("\\_SB.CPUS");
{
int i;
Aml *ctrl_lock = aml_name("%s.%s", cphp_res_path, CPU_LOCK);
Aml *cpu_selector = aml_name("%s.%s", cphp_res_path, CPU_SELECTOR);
Aml *is_enabled = aml_name("%s.%s", cphp_res_path, CPU_ENABLED);
Aml *cpu_cmd = aml_name("%s.%s", cphp_res_path, CPU_COMMAND);
Aml *cpu_data = aml_name("%s.%s", cphp_res_path, CPU_DATA);
Aml *ins_evt = aml_name("%s.%s", cphp_res_path, CPU_INSERT_EVENT);
Aml *rm_evt = aml_name("%s.%s", cphp_res_path, CPU_REMOVE_EVENT);
Aml *ej_evt = aml_name("%s.%s", cphp_res_path, CPU_EJECT_EVENT);
aml_append(cpus_dev, aml_name_decl("_HID", aml_string("ACPI0010")));
aml_append(cpus_dev, aml_name_decl("_CID", aml_eisaid("PNP0A05")));
method = aml_method(CPU_NOTIFY_METHOD, 2, AML_NOTSERIALIZED);
for (i = 0; i < arch_ids->len; i++) {
Aml *cpu = aml_name(CPU_NAME_FMT, i);
Aml *uid = aml_arg(0);
Aml *event = aml_arg(1);
ifctx = aml_if(aml_equal(uid, aml_int(i)));
{
aml_append(ifctx, aml_notify(cpu, event));
}
aml_append(method, ifctx);
}
aml_append(cpus_dev, method);
method = aml_method(CPU_STS_METHOD, 1, AML_SERIALIZED);
{
Aml *idx = aml_arg(0);
Aml *sta = aml_local(0);
aml_append(method, aml_acquire(ctrl_lock, 0xFFFF));
aml_append(method, aml_store(idx, cpu_selector));
aml_append(method, aml_store(zero, sta));
ifctx = aml_if(aml_equal(is_enabled, one));
{
aml_append(ifctx, aml_store(aml_int(0xF), sta));
}
aml_append(method, ifctx);
aml_append(method, aml_release(ctrl_lock));
aml_append(method, aml_return(sta));
}
aml_append(cpus_dev, method);
method = aml_method(CPU_EJECT_METHOD, 1, AML_SERIALIZED);
{
Aml *idx = aml_arg(0);
aml_append(method, aml_acquire(ctrl_lock, 0xFFFF));
aml_append(method, aml_store(idx, cpu_selector));
aml_append(method, aml_store(one, ej_evt));
aml_append(method, aml_release(ctrl_lock));
}
aml_append(cpus_dev, method);
method = aml_method(CPU_SCAN_METHOD, 0, AML_SERIALIZED);
{
Aml *else_ctx;
Aml *while_ctx;
Aml *has_event = aml_local(0);
Aml *dev_chk = aml_int(1);
Aml *eject_req = aml_int(3);
Aml *next_cpu_cmd = aml_int(CPHP_GET_NEXT_CPU_WITH_EVENT_CMD);
aml_append(method, aml_acquire(ctrl_lock, 0xFFFF));
aml_append(method, aml_store(one, has_event));
while_ctx = aml_while(aml_equal(has_event, one));
{
/* clear loop exit condition, ins_evt/rm_evt checks
* will set it to 1 while next_cpu_cmd returns a CPU
* with events */
aml_append(while_ctx, aml_store(zero, has_event));
aml_append(while_ctx, aml_store(next_cpu_cmd, cpu_cmd));
ifctx = aml_if(aml_equal(ins_evt, one));
{
aml_append(ifctx,
aml_call2(CPU_NOTIFY_METHOD, cpu_data, dev_chk));
aml_append(ifctx, aml_store(one, ins_evt));
aml_append(ifctx, aml_store(one, has_event));
}
aml_append(while_ctx, ifctx);
else_ctx = aml_else();
ifctx = aml_if(aml_equal(rm_evt, one));
{
aml_append(ifctx,
aml_call2(CPU_NOTIFY_METHOD, cpu_data, eject_req));
aml_append(ifctx, aml_store(one, rm_evt));
aml_append(ifctx, aml_store(one, has_event));
}
aml_append(else_ctx, ifctx);
aml_append(while_ctx, else_ctx);
}
aml_append(method, while_ctx);
aml_append(method, aml_release(ctrl_lock));
}
aml_append(cpus_dev, method);
method = aml_method(CPU_OST_METHOD, 4, AML_SERIALIZED);
{
Aml *uid = aml_arg(0);
Aml *ev_cmd = aml_int(CPHP_OST_EVENT_CMD);
Aml *st_cmd = aml_int(CPHP_OST_STATUS_CMD);
aml_append(method, aml_acquire(ctrl_lock, 0xFFFF));
aml_append(method, aml_store(uid, cpu_selector));
aml_append(method, aml_store(ev_cmd, cpu_cmd));
aml_append(method, aml_store(aml_arg(1), cpu_data));
aml_append(method, aml_store(st_cmd, cpu_cmd));
aml_append(method, aml_store(aml_arg(2), cpu_data));
aml_append(method, aml_release(ctrl_lock));
}
aml_append(cpus_dev, method);
/* build Processor object for each processor */
for (i = 0; i < arch_ids->len; i++) {
Aml *dev;
Aml *uid = aml_int(i);
GArray *madt_buf = g_array_new(0, 1, 1);
int arch_id = arch_ids->cpus[i].arch_id;
if (opts.acpi_1_compatible && arch_id < 255) {
dev = aml_processor(i, 0, 0, CPU_NAME_FMT, i);
} else {
dev = aml_device(CPU_NAME_FMT, i);
aml_append(dev, aml_name_decl("_HID", aml_string("ACPI0007")));
aml_append(dev, aml_name_decl("_UID", uid));
}
method = aml_method("_STA", 0, AML_SERIALIZED);
aml_append(method, aml_return(aml_call1(CPU_STS_METHOD, uid)));
aml_append(dev, method);
/* build _MAT object */
assert(adevc && adevc->madt_cpu);
adevc->madt_cpu(adev, i, arch_ids, madt_buf);
switch (madt_buf->data[0]) {
case ACPI_APIC_PROCESSOR: {
AcpiMadtProcessorApic *apic = (void *)madt_buf->data;
apic->flags = cpu_to_le32(1);
break;
}
case ACPI_APIC_LOCAL_X2APIC: {
AcpiMadtProcessorX2Apic *apic = (void *)madt_buf->data;
apic->flags = cpu_to_le32(1);
break;
}
default:
assert(0);
}
aml_append(dev, aml_name_decl("_MAT",
aml_buffer(madt_buf->len, (uint8_t *)madt_buf->data)));
g_array_free(madt_buf, true);
if (CPU(arch_ids->cpus[i].cpu) != first_cpu) {
method = aml_method("_EJ0", 1, AML_NOTSERIALIZED);
aml_append(method, aml_call1(CPU_EJECT_METHOD, uid));
aml_append(dev, method);
}
method = aml_method("_OST", 3, AML_SERIALIZED);
aml_append(method,
aml_call4(CPU_OST_METHOD, uid, aml_arg(0),
aml_arg(1), aml_arg(2))
);
aml_append(dev, method);
/* Linux guests discard SRAT info for non-present CPUs
* as a result _PXM is required for all CPUs which might
* be hot-plugged. For simplicity, add it for all CPUs.
*/
if (arch_ids->cpus[i].props.has_node_id) {
aml_append(dev, aml_name_decl("_PXM",
aml_int(arch_ids->cpus[i].props.node_id)));
}
aml_append(cpus_dev, dev);
}
}
aml_append(sb_scope, cpus_dev);
aml_append(table, sb_scope);
method = aml_method(event_handler_method, 0, AML_NOTSERIALIZED);
aml_append(method, aml_call0("\\_SB.CPUS." CPU_SCAN_METHOD));
aml_append(table, method);
g_free(cphp_res_path);
}