/* Read-only node: To display all the online managed CPUs */
static int get_managed_online_cpus(char *buf, const struct kernel_param *kp)
{
int i, cnt = 0;
struct cpumask tmp_mask;
struct cpu_hp *i_cpu_hp;
if (!clusters_inited)
return cnt;
for (i = 0; i < num_clusters; i++) {
i_cpu_hp = managed_clusters[i];
cpumask_clear(&tmp_mask);
cpumask_complement(&tmp_mask, i_cpu_hp->offlined_cpus);
cpumask_and(&tmp_mask, i_cpu_hp->cpus, &tmp_mask);
cnt += cpulist_scnprintf(buf + cnt, PAGE_SIZE - cnt,
&tmp_mask);
if ((i + 1) >= num_clusters)
break;
cnt += snprintf(buf + cnt, PAGE_SIZE - cnt, ":");
}
return cnt;
}
static int _acpi_map_lsapic(acpi_handle handle, int *pcpu)
{
struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
union acpi_object *obj;
struct acpi_madt_local_sapic *lsapic;
cpumask_t tmp_map;
int cpu, physid;
if (ACPI_FAILURE(acpi_evaluate_object(handle, "_MAT", NULL, &buffer)))
return -EINVAL;
if (!buffer.length || !buffer.pointer)
return -EINVAL;
obj = buffer.pointer;
if (obj->type != ACPI_TYPE_BUFFER)
{
kfree(buffer.pointer);
return -EINVAL;
}
lsapic = (struct acpi_madt_local_sapic *)obj->buffer.pointer;
if ((lsapic->header.type != ACPI_MADT_TYPE_LOCAL_SAPIC) ||
(!(lsapic->lapic_flags & ACPI_MADT_ENABLED))) {
kfree(buffer.pointer);
return -EINVAL;
}
physid = ((lsapic->id << 8) | (lsapic->eid));
kfree(buffer.pointer);
buffer.length = ACPI_ALLOCATE_BUFFER;
buffer.pointer = NULL;
cpumask_complement(&tmp_map, cpu_present_mask);
cpu = cpumask_first(&tmp_map);
if (cpu >= nr_cpu_ids)
return -EINVAL;
acpi_map_cpu2node(handle, cpu, physid);
set_cpu_present(cpu, true);
ia64_cpu_to_sapicid[cpu] = physid;
acpi_processor_set_pdc(handle);
*pcpu = cpu;
return (0);
}
static int _acpi_map_lsapic(acpi_handle handle, int physid, int *pcpu)
{
cpumask_t tmp_map;
int cpu;
cpumask_complement(&tmp_map, cpu_present_mask);
cpu = cpumask_first(&tmp_map);
if (cpu >= nr_cpu_ids)
return -EINVAL;
acpi_map_cpu2node(handle, cpu, physid);
set_cpu_present(cpu, true);
ia64_cpu_to_sapicid[cpu] = physid;
acpi_processor_set_pdc(handle);
*pcpu = cpu;
return (0);
}
