diff options
Diffstat (limited to 'arch/powerpc/platforms/pseries/dlpar.c')
| -rw-r--r-- | arch/powerpc/platforms/pseries/dlpar.c | 197 |
1 files changed, 7 insertions, 190 deletions
diff --git a/arch/powerpc/platforms/pseries/dlpar.c b/arch/powerpc/platforms/pseries/dlpar.c index f244dcb4f2cf..2b93ae8d557a 100644 --- a/arch/powerpc/platforms/pseries/dlpar.c +++ b/arch/powerpc/platforms/pseries/dlpar.c @@ -20,7 +20,6 @@ #include <linux/of.h> #include "of_helpers.h" -#include "offline_states.h" #include "pseries.h" #include <asm/prom.h> @@ -338,185 +337,6 @@ int dlpar_release_drc(u32 drc_index) return 0; } -#ifdef CONFIG_ARCH_CPU_PROBE_RELEASE - -static int dlpar_online_cpu(struct device_node *dn) -{ - int rc = 0; - unsigned int cpu; - int len, nthreads, i; - const __be32 *intserv; - u32 thread; - - intserv = of_get_property(dn, "ibm,ppc-interrupt-server#s", &len); - if (!intserv) - return -EINVAL; - - nthreads = len / sizeof(u32); - - cpu_maps_update_begin(); - for (i = 0; i < nthreads; i++) { - thread = be32_to_cpu(intserv[i]); - for_each_present_cpu(cpu) { - if (get_hard_smp_processor_id(cpu) != thread) - continue; - BUG_ON(get_cpu_current_state(cpu) - != CPU_STATE_OFFLINE); - cpu_maps_update_done(); - rc = device_online(get_cpu_device(cpu)); - if (rc) - goto out; - cpu_maps_update_begin(); - - break; - } - if (cpu == num_possible_cpus()) - printk(KERN_WARNING "Could not find cpu to online " - "with physical id 0x%x\n", thread); - } - cpu_maps_update_done(); - -out: - 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; - - rc = dlpar_acquire_drc(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); - of_node_put(parent); - if (!dn) { - dlpar_release_drc(drc_index); - 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; -} - -static int dlpar_offline_cpu(struct device_node *dn) -{ - int rc = 0; - unsigned int cpu; - int len, nthreads, i; - const __be32 *intserv; - u32 thread; - - intserv = of_get_property(dn, "ibm,ppc-interrupt-server#s", &len); - if (!intserv) - return -EINVAL; - - nthreads = len / sizeof(u32); - - cpu_maps_update_begin(); - for (i = 0; i < nthreads; i++) { - thread = be32_to_cpu(intserv[i]); - for_each_present_cpu(cpu) { - if (get_hard_smp_processor_id(cpu) != thread) - continue; - - if (get_cpu_current_state(cpu) == CPU_STATE_OFFLINE) - break; - - if (get_cpu_current_state(cpu) == CPU_STATE_ONLINE) { - set_preferred_offline_state(cpu, CPU_STATE_OFFLINE); - cpu_maps_update_done(); - rc = device_offline(get_cpu_device(cpu)); - if (rc) - goto out; - cpu_maps_update_begin(); - break; - - } - - /* - * The cpu is in CPU_STATE_INACTIVE. - * Upgrade it's state to CPU_STATE_OFFLINE. - */ - set_preferred_offline_state(cpu, CPU_STATE_OFFLINE); - BUG_ON(plpar_hcall_norets(H_PROD, thread) - != H_SUCCESS); - __cpu_die(cpu); - break; - } - if (cpu == num_possible_cpus()) - printk(KERN_WARNING "Could not find cpu to offline " - "with physical id 0x%x\n", thread); - } - cpu_maps_update_done(); - -out: - return rc; - -} - -static ssize_t dlpar_cpu_release(const char *buf, size_t count) -{ - struct device_node *dn; - u32 drc_index; - int rc; - - dn = of_find_node_by_path(buf); - if (!dn) - return -EINVAL; - - rc = of_property_read_u32(dn, "ibm,my-drc-index", &drc_index); - if (rc) { - of_node_put(dn); - return -EINVAL; - } - - rc = dlpar_offline_cpu(dn); - if (rc) { - of_node_put(dn); - return -EINVAL; - } - - rc = dlpar_release_drc(drc_index); - if (rc) { - of_node_put(dn); - return rc; - } - - rc = dlpar_detach_node(dn); - if (rc) { - dlpar_acquire_drc(drc_index); - return rc; - } - - of_node_put(dn); - - return count; -} - -#endif /* CONFIG_ARCH_CPU_PROBE_RELEASE */ - static int handle_dlpar_errorlog(struct pseries_hp_errorlog *hp_elog) { int rc; @@ -536,6 +356,9 @@ static int handle_dlpar_errorlog(struct pseries_hp_errorlog *hp_elog) case PSERIES_HP_ELOG_RESOURCE_MEM: rc = dlpar_memory(hp_elog); break; + case PSERIES_HP_ELOG_RESOURCE_CPU: + rc = dlpar_cpu(hp_elog); + break; default: pr_warn_ratelimited("Invalid resource (%d) specified\n", hp_elog->resource); @@ -565,6 +388,9 @@ static ssize_t dlpar_store(struct class *class, struct class_attribute *attr, if (!strncmp(arg, "memory", 6)) { hp_elog->resource = PSERIES_HP_ELOG_RESOURCE_MEM; arg += strlen("memory "); + } else if (!strncmp(arg, "cpu", 3)) { + hp_elog->resource = PSERIES_HP_ELOG_RESOURCE_CPU; + arg += strlen("cpu "); } else { pr_err("Invalid resource specified: \"%s\"\n", buf); rc = -EINVAL; @@ -624,16 +450,7 @@ static CLASS_ATTR(dlpar, S_IWUSR, NULL, dlpar_store); static int __init pseries_dlpar_init(void) { - int rc; - -#ifdef CONFIG_ARCH_CPU_PROBE_RELEASE - ppc_md.cpu_probe = dlpar_cpu_probe; - ppc_md.cpu_release = dlpar_cpu_release; -#endif /* CONFIG_ARCH_CPU_PROBE_RELEASE */ - - rc = sysfs_create_file(kernel_kobj, &class_attr_dlpar.attr); - - return rc; + return sysfs_create_file(kernel_kobj, &class_attr_dlpar.attr); } machine_device_initcall(pseries, pseries_dlpar_init); |