static ssize_t dlpar_cpu_probe(const char *buf, size_t count)
{
struct device_node *dn;
unsigned long drc_index;
char *cpu_name;
int rc;
cpu_hotplug_driver_lock();
rc = strict_strtoul(buf, 0, &drc_index);
if (rc) {
rc = -EINVAL;
goto out;
}
dn = dlpar_configure_connector(drc_index);
if (!dn) {
rc = -EINVAL;
goto out;
}
/* configure-connector reports cpus as living in the base
* directory of the device tree. CPUs actually live in the
* cpus directory so we need to fixup the full_name.
*/
cpu_name = kzalloc(strlen(dn->full_name) + strlen("/cpus") + 1,
GFP_KERNEL);
if (!cpu_name) {
dlpar_free_cc_nodes(dn);
rc = -ENOMEM;
goto out;
}
sprintf(cpu_name, "/cpus%s", dn->full_name);
kfree(dn->full_name);
dn->full_name = cpu_name;
rc = dlpar_acquire_drc(drc_index);
if (rc) {
dlpar_free_cc_nodes(dn);
rc = -EINVAL;
goto out;
}
rc = dlpar_attach_node(dn);
if (rc) {
dlpar_release_drc(drc_index);
dlpar_free_cc_nodes(dn);
}
rc = dlpar_online_cpu(dn);
out:
cpu_hotplug_driver_unlock();
return rc ? rc : count;
}
static ssize_t dlpar_cpu_probe(const char *buf, size_t count)
{
struct device_node *dn, *parent;
unsigned long drc_index;
int rc;
cpu_hotplug_driver_lock();
rc = strict_strtoul(buf, 0, &drc_index);
if (rc) {
rc = -EINVAL;
goto out;
}
parent = of_find_node_by_path("/cpus");
if (!parent) {
rc = -ENODEV;
goto out;
}
dn = dlpar_configure_connector(drc_index, parent);
if (!dn) {
rc = -EINVAL;
goto out;
}
of_node_put(parent);
rc = dlpar_acquire_drc(drc_index);
if (rc) {
dlpar_free_cc_nodes(dn);
rc = -EINVAL;
goto out;
}
rc = dlpar_attach_node(dn);
if (rc) {
dlpar_release_drc(drc_index);
dlpar_free_cc_nodes(dn);
goto out;
}
rc = dlpar_online_cpu(dn);
out:
cpu_hotplug_driver_unlock();
return rc ? rc : count;
}
static int add_dt_node(u32 parent_phandle, u32 drc_index)
{
struct device_node *dn;
struct device_node *parent_dn;
int rc;
parent_dn = of_find_node_by_phandle(parent_phandle);
if (!parent_dn)
return -ENOENT;
dn = dlpar_configure_connector(drc_index, parent_dn);
if (!dn)
return -ENOENT;
rc = dlpar_attach_node(dn);
if (rc)
dlpar_free_cc_nodes(dn);
of_node_put(parent_dn);
return rc;
}
static ssize_t dlpar_cpu_probe(const char *buf, size_t count)
{
struct device_node *dn, *parent;
u32 drc_index;
int rc;
rc = kstrtou32(buf, 0, &drc_index);
if (rc)
return -EINVAL;
parent = of_find_node_by_path("/cpus");
if (!parent)
return -ENODEV;
dn = dlpar_configure_connector(cpu_to_be32(drc_index), parent);
if (!dn)
return -EINVAL;
of_node_put(parent);
rc = dlpar_acquire_drc(drc_index);
if (rc) {
dlpar_free_cc_nodes(dn);
return -EINVAL;
}
rc = dlpar_attach_node(dn);
if (rc) {
dlpar_release_drc(drc_index);
dlpar_free_cc_nodes(dn);
return rc;
}
rc = dlpar_online_cpu(dn);
if (rc)
return rc;
return count;
}