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-rw-r--r--arch/powerpc/platforms/pseries/dlpar.c197
-rw-r--r--arch/powerpc/platforms/pseries/hotplug-cpu.c550
-rw-r--r--arch/powerpc/platforms/pseries/lpar.c64
-rw-r--r--arch/powerpc/platforms/pseries/pseries.h9
-rw-r--r--arch/powerpc/platforms/pseries/ras.c55
5 files changed, 626 insertions, 249 deletions
diff --git a/arch/powerpc/platforms/pseries/dlpar.c b/arch/powerpc/platforms/pseries/dlpar.c
index f244dcb4f..2b93ae8d5 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);
diff --git a/arch/powerpc/platforms/pseries/hotplug-cpu.c b/arch/powerpc/platforms/pseries/hotplug-cpu.c
index 62475440f..32274f72f 100644
--- a/arch/powerpc/platforms/pseries/hotplug-cpu.c
+++ b/arch/powerpc/platforms/pseries/hotplug-cpu.c
@@ -18,12 +18,15 @@
* 2 of the License, or (at your option) any later version.
*/
+#define pr_fmt(fmt) "pseries-hotplug-cpu: " fmt
+
#include <linux/kernel.h>
#include <linux/interrupt.h>
#include <linux/delay.h>
#include <linux/sched.h> /* for idle_task_exit */
#include <linux/cpu.h>
#include <linux/of.h>
+#include <linux/slab.h>
#include <asm/prom.h>
#include <asm/rtas.h>
#include <asm/firmware.h>
@@ -32,6 +35,7 @@
#include <asm/xics.h>
#include <asm/plpar_wrappers.h>
+#include "pseries.h"
#include "offline_states.h"
/* This version can't take the spinlock, because it never returns */
@@ -88,13 +92,7 @@ void set_default_offline_state(int cpu)
static void rtas_stop_self(void)
{
- static struct rtas_args args = {
- .nargs = 0,
- .nret = cpu_to_be32(1),
- .rets = &args.args[0],
- };
-
- args.token = cpu_to_be32(rtas_stop_self_token);
+ static struct rtas_args args;
local_irq_disable();
@@ -102,7 +100,8 @@ static void rtas_stop_self(void)
printk("cpu %u (hwid %u) Ready to die...\n",
smp_processor_id(), hard_smp_processor_id());
- enter_rtas(__pa(&args));
+
+ rtas_call_unlocked(&args, rtas_stop_self_token, 0, 1, NULL);
panic("Alas, I survived.\n");
}
@@ -339,6 +338,536 @@ static void pseries_remove_processor(struct device_node *np)
cpu_maps_update_done();
}
+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 bool dlpar_cpu_exists(struct device_node *parent, u32 drc_index)
+{
+ struct device_node *child = NULL;
+ u32 my_drc_index;
+ bool found;
+ int rc;
+
+ /* Assume cpu doesn't exist */
+ found = false;
+
+ for_each_child_of_node(parent, child) {
+ rc = of_property_read_u32(child, "ibm,my-drc-index",
+ &my_drc_index);
+ if (rc)
+ continue;
+
+ if (my_drc_index == drc_index) {
+ of_node_put(child);
+ found = true;
+ break;
+ }
+ }
+
+ return found;
+}
+
+static bool valid_cpu_drc_index(struct device_node *parent, u32 drc_index)
+{
+ bool found = false;
+ int rc, index;
+
+ index = 0;
+ while (!found) {
+ u32 drc;
+
+ rc = of_property_read_u32_index(parent, "ibm,drc-indexes",
+ index++, &drc);
+ if (rc)
+ break;
+
+ if (drc == drc_index)
+ found = true;
+ }
+
+ return found;
+}
+
+static ssize_t dlpar_cpu_add(u32 drc_index)
+{
+ struct device_node *dn, *parent;
+ int rc, saved_rc;
+
+ pr_debug("Attempting to add CPU, drc index: %x\n", drc_index);
+
+ parent = of_find_node_by_path("/cpus");
+ if (!parent) {
+ pr_warn("Failed to find CPU root node \"/cpus\"\n");
+ return -ENODEV;
+ }
+
+ if (dlpar_cpu_exists(parent, drc_index)) {
+ of_node_put(parent);
+ pr_warn("CPU with drc index %x already exists\n", drc_index);
+ return -EINVAL;
+ }
+
+ if (!valid_cpu_drc_index(parent, drc_index)) {
+ of_node_put(parent);
+ pr_warn("Cannot find CPU (drc index %x) to add.\n", drc_index);
+ return -EINVAL;
+ }
+
+ rc = dlpar_acquire_drc(drc_index);
+ if (rc) {
+ pr_warn("Failed to acquire DRC, rc: %d, drc index: %x\n",
+ rc, drc_index);
+ of_node_put(parent);
+ return -EINVAL;
+ }
+
+ dn = dlpar_configure_connector(cpu_to_be32(drc_index), parent);
+ of_node_put(parent);
+ if (!dn) {
+ pr_warn("Failed call to configure-connector, drc index: %x\n",
+ drc_index);
+ dlpar_release_drc(drc_index);
+ return -EINVAL;
+ }
+
+ rc = dlpar_attach_node(dn);
+ if (rc) {
+ saved_rc = rc;
+ pr_warn("Failed to attach node %s, rc: %d, drc index: %x\n",
+ dn->name, rc, drc_index);
+
+ rc = dlpar_release_drc(drc_index);
+ if (!rc)
+ dlpar_free_cc_nodes(dn);
+
+ return saved_rc;
+ }
+
+ rc = dlpar_online_cpu(dn);
+ if (rc) {
+ saved_rc = rc;
+ pr_warn("Failed to online cpu %s, rc: %d, drc index: %x\n",
+ dn->name, rc, drc_index);
+
+ rc = dlpar_detach_node(dn);
+ if (!rc)
+ dlpar_release_drc(drc_index);
+
+ return saved_rc;
+ }
+
+ pr_debug("Successfully added CPU %s, drc index: %x\n", dn->name,
+ drc_index);
+ return rc;
+}
+
+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_remove(struct device_node *dn, u32 drc_index)
+{
+ int rc;
+
+ pr_debug("Attemping to remove CPU %s, drc index: %x\n",
+ dn->name, drc_index);
+
+ rc = dlpar_offline_cpu(dn);
+ if (rc) {
+ pr_warn("Failed to offline CPU %s, rc: %d\n", dn->name, rc);
+ return -EINVAL;
+ }
+
+ rc = dlpar_release_drc(drc_index);
+ if (rc) {
+ pr_warn("Failed to release drc (%x) for CPU %s, rc: %d\n",
+ drc_index, dn->name, rc);
+ dlpar_online_cpu(dn);
+ return rc;
+ }
+
+ rc = dlpar_detach_node(dn);
+ if (rc) {
+ int saved_rc = rc;
+
+ pr_warn("Failed to detach CPU %s, rc: %d", dn->name, rc);
+
+ rc = dlpar_acquire_drc(drc_index);
+ if (!rc)
+ dlpar_online_cpu(dn);
+
+ return saved_rc;
+ }
+
+ pr_debug("Successfully removed CPU, drc index: %x\n", drc_index);
+ return 0;
+}
+
+static struct device_node *cpu_drc_index_to_dn(u32 drc_index)
+{
+ struct device_node *dn;
+ u32 my_index;
+ int rc;
+
+ for_each_node_by_type(dn, "cpu") {
+ rc = of_property_read_u32(dn, "ibm,my-drc-index", &my_index);
+ if (rc)
+ continue;
+
+ if (my_index == drc_index)
+ break;
+ }
+
+ return dn;
+}
+
+static int dlpar_cpu_remove_by_index(u32 drc_index)
+{
+ struct device_node *dn;
+ int rc;
+
+ dn = cpu_drc_index_to_dn(drc_index);
+ if (!dn) {
+ pr_warn("Cannot find CPU (drc index %x) to remove\n",
+ drc_index);
+ return -ENODEV;
+ }
+
+ rc = dlpar_cpu_remove(dn, drc_index);
+ of_node_put(dn);
+ return rc;
+}
+
+static int find_dlpar_cpus_to_remove(u32 *cpu_drcs, int cpus_to_remove)
+{
+ struct device_node *dn;
+ int cpus_found = 0;
+ int rc;
+
+ /* We want to find cpus_to_remove + 1 CPUs to ensure we do not
+ * remove the last CPU.
+ */
+ for_each_node_by_type(dn, "cpu") {
+ cpus_found++;
+
+ if (cpus_found > cpus_to_remove) {
+ of_node_put(dn);
+ break;
+ }
+
+ /* Note that cpus_found is always 1 ahead of the index
+ * into the cpu_drcs array, so we use cpus_found - 1
+ */
+ rc = of_property_read_u32(dn, "ibm,my-drc-index",
+ &cpu_drcs[cpus_found - 1]);
+ if (rc) {
+ pr_warn("Error occurred getting drc-index for %s\n",
+ dn->name);
+ of_node_put(dn);
+ return -1;
+ }
+ }
+
+ if (cpus_found < cpus_to_remove) {
+ pr_warn("Failed to find enough CPUs (%d of %d) to remove\n",
+ cpus_found, cpus_to_remove);
+ } else if (cpus_found == cpus_to_remove) {
+ pr_warn("Cannot remove all CPUs\n");
+ }
+
+ return cpus_found;
+}
+
+static int dlpar_cpu_remove_by_count(u32 cpus_to_remove)
+{
+ u32 *cpu_drcs;
+ int cpus_found;
+ int cpus_removed = 0;
+ int i, rc;
+
+ pr_debug("Attempting to hot-remove %d CPUs\n", cpus_to_remove);
+
+ cpu_drcs = kcalloc(cpus_to_remove, sizeof(*cpu_drcs), GFP_KERNEL);
+ if (!cpu_drcs)
+ return -EINVAL;
+
+ cpus_found = find_dlpar_cpus_to_remove(cpu_drcs, cpus_to_remove);
+ if (cpus_found <= cpus_to_remove) {
+ kfree(cpu_drcs);
+ return -EINVAL;
+ }
+
+ for (i = 0; i < cpus_to_remove; i++) {
+ rc = dlpar_cpu_remove_by_index(cpu_drcs[i]);
+ if (rc)
+ break;
+
+ cpus_removed++;
+ }
+
+ if (cpus_removed != cpus_to_remove) {
+ pr_warn("CPU hot-remove failed, adding back removed CPUs\n");
+
+ for (i = 0; i < cpus_removed; i++)
+ dlpar_cpu_add(cpu_drcs[i]);
+
+ rc = -EINVAL;
+ } else {
+ rc = 0;
+ }
+
+ kfree(cpu_drcs);
+ return rc;
+}
+
+static int find_dlpar_cpus_to_add(u32 *cpu_drcs, u32 cpus_to_add)
+{
+ struct device_node *parent;
+ int cpus_found = 0;
+ int index, rc;
+
+ parent = of_find_node_by_path("/cpus");
+ if (!parent) {
+ pr_warn("Could not find CPU root node in device tree\n");
+ kfree(cpu_drcs);
+ return -1;
+ }
+
+ /* Search the ibm,drc-indexes array for possible CPU drcs to
+ * add. Note that the format of the ibm,drc-indexes array is
+ * the number of entries in the array followed by the array
+ * of drc values so we start looking at index = 1.
+ */
+ index = 1;
+ while (cpus_found < cpus_to_add) {
+ u32 drc;
+
+ rc = of_property_read_u32_index(parent, "ibm,drc-indexes",
+ index++, &drc);
+ if (rc)
+ break;
+
+ if (dlpar_cpu_exists(parent, drc))
+ continue;
+
+ cpu_drcs[cpus_found++] = drc;
+ }
+
+ of_node_put(parent);
+ return cpus_found;
+}
+
+static int dlpar_cpu_add_by_count(u32 cpus_to_add)
+{
+ u32 *cpu_drcs;
+ int cpus_added = 0;
+ int cpus_found;
+ int i, rc;
+
+ pr_debug("Attempting to hot-add %d CPUs\n", cpus_to_add);
+
+ cpu_drcs = kcalloc(cpus_to_add, sizeof(*cpu_drcs), GFP_KERNEL);
+ if (!cpu_drcs)
+ return -EINVAL;
+
+ cpus_found = find_dlpar_cpus_to_add(cpu_drcs, cpus_to_add);
+ if (cpus_found < cpus_to_add) {
+ pr_warn("Failed to find enough CPUs (%d of %d) to add\n",
+ cpus_found, cpus_to_add);
+ kfree(cpu_drcs);
+ return -EINVAL;
+ }
+
+ for (i = 0; i < cpus_to_add; i++) {
+ rc = dlpar_cpu_add(cpu_drcs[i]);
+ if (rc)
+ break;
+
+ cpus_added++;
+ }
+
+ if (cpus_added < cpus_to_add) {
+ pr_warn("CPU hot-add failed, removing any added CPUs\n");
+
+ for (i = 0; i < cpus_added; i++)
+ dlpar_cpu_remove_by_index(cpu_drcs[i]);
+
+ rc = -EINVAL;
+ } else {
+ rc = 0;
+ }
+
+ kfree(cpu_drcs);
+ return rc;
+}
+
+int dlpar_cpu(struct pseries_hp_errorlog *hp_elog)
+{
+ u32 count, drc_index;
+ int rc;
+
+ count = hp_elog->_drc_u.drc_count;
+ drc_index = hp_elog->_drc_u.drc_index;
+
+ lock_device_hotplug();
+
+ switch (hp_elog->action) {
+ case PSERIES_HP_ELOG_ACTION_REMOVE:
+ if (hp_elog->id_type == PSERIES_HP_ELOG_ID_DRC_COUNT)
+ rc = dlpar_cpu_remove_by_count(count);
+ else if (hp_elog->id_type == PSERIES_HP_ELOG_ID_DRC_INDEX)
+ rc = dlpar_cpu_remove_by_index(drc_index);
+ else
+ rc = -EINVAL;
+ break;
+ case PSERIES_HP_ELOG_ACTION_ADD:
+ if (hp_elog->id_type == PSERIES_HP_ELOG_ID_DRC_COUNT)
+ rc = dlpar_cpu_add_by_count(count);
+ else if (hp_elog->id_type == PSERIES_HP_ELOG_ID_DRC_INDEX)
+ rc = dlpar_cpu_add(drc_index);
+ else
+ rc = -EINVAL;
+ break;
+ default:
+ pr_err("Invalid action (%d) specified\n", hp_elog->action);
+ rc = -EINVAL;
+ break;
+ }
+
+ unlock_device_hotplug();
+ return rc;
+}
+
+#ifdef CONFIG_ARCH_CPU_PROBE_RELEASE
+
+static ssize_t dlpar_cpu_probe(const char *buf, size_t count)
+{
+ u32 drc_index;
+ int rc;
+
+ rc = kstrtou32(buf, 0, &drc_index);
+ if (rc)
+ return -EINVAL;
+
+ rc = dlpar_cpu_add(drc_index);
+
+ return rc ? rc : count;
+}
+
+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_cpu_remove(dn, drc_index);
+ of_node_put(dn);
+
+ return rc ? rc : count;
+}
+
+#endif /* CONFIG_ARCH_CPU_PROBE_RELEASE */
+
static int pseries_smp_notifier(struct notifier_block *nb,
unsigned long action, void *data)
{
@@ -385,6 +914,11 @@ static int __init pseries_cpu_hotplug_init(void)
int cpu;
int qcss_tok;
+#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 */
+
for_each_node_by_name(np, "interrupt-controller") {
typep = of_get_property(np, "compatible", NULL);
if (strstr(typep, "open-pic")) {
diff --git a/arch/powerpc/platforms/pseries/lpar.c b/arch/powerpc/platforms/pseries/lpar.c
index b7a67e3d2..477290ad8 100644
--- a/arch/powerpc/platforms/pseries/lpar.c
+++ b/arch/powerpc/platforms/pseries/lpar.c
@@ -315,48 +315,48 @@ static long pSeries_lpar_hpte_updatepp(unsigned long slot,
return 0;
}
-static unsigned long pSeries_lpar_hpte_getword0(unsigned long slot)
+static long __pSeries_lpar_hpte_find(unsigned long want_v, unsigned long hpte_group)
{
- unsigned long dword0;
- unsigned long lpar_rc;
- unsigned long dummy_word1;
- unsigned long flags;
+ long lpar_rc;
+ unsigned long i, j;
+ struct {
+ unsigned long pteh;
+ unsigned long ptel;
+ } ptes[4];
- /* Read 1 pte at a time */
- /* Do not need RPN to logical page translation */
- /* No cross CEC PFT access */
- flags = 0;
+ for (i = 0; i < HPTES_PER_GROUP; i += 4, hpte_group += 4) {
- lpar_rc = plpar_pte_read(flags, slot, &dword0, &dummy_word1);
+ lpar_rc = plpar_pte_read_4(0, hpte_group, (void *)ptes);
+ if (lpar_rc != H_SUCCESS)
+ continue;
- BUG_ON(lpar_rc != H_SUCCESS);
+ for (j = 0; j < 4; j++) {
+ if (HPTE_V_COMPARE(ptes[j].pteh, want_v) &&
+ (ptes[j].pteh & HPTE_V_VALID))
+ return i + j;
+ }
+ }
- return dword0;
+ return -1;
}
static long pSeries_lpar_hpte_find(unsigned long vpn, int psize, int ssize)
{
- unsigned long hash;
- unsigned long i;
long slot;
- unsigned long want_v, hpte_v;
+ unsigned long hash;
+ unsigned long want_v;
+ unsigned long hpte_group;
hash = hpt_hash(vpn, mmu_psize_defs[psize].shift, ssize);
want_v = hpte_encode_avpn(vpn, psize, ssize);
/* Bolted entries are always in the primary group */
- slot = (hash & htab_hash_mask) * HPTES_PER_GROUP;
- for (i = 0; i < HPTES_PER_GROUP; i++) {
- hpte_v = pSeries_lpar_hpte_getword0(slot);
-
- if (HPTE_V_COMPARE(hpte_v, want_v) && (hpte_v & HPTE_V_VALID))
- /* HPTE matches */
- return slot;
- ++slot;
- }
-
- return -1;
-}
+ hpte_group = (hash & htab_hash_mask) * HPTES_PER_GROUP;
+ slot = __pSeries_lpar_hpte_find(want_v, hpte_group);
+ if (slot < 0)
+ return -1;
+ return hpte_group + slot;
+}
static void pSeries_lpar_hpte_updateboltedpp(unsigned long newpp,
unsigned long ea,
@@ -396,6 +396,7 @@ static void pSeries_lpar_hpte_invalidate(unsigned long slot, unsigned long vpn,
BUG_ON(lpar_rc != H_SUCCESS);
}
+#ifdef CONFIG_TRANSPARENT_HUGEPAGE
/*
* Limit iterations holding pSeries_lpar_tlbie_lock to 3. We also need
* to make sure that we avoid bouncing the hypervisor tlbie lock.
@@ -494,6 +495,15 @@ static void pSeries_lpar_hugepage_invalidate(unsigned long vsid,
__pSeries_lpar_hugepage_invalidate(slot_array, vpn_array,
index, psize, ssize);
}
+#else
+static void pSeries_lpar_hugepage_invalidate(unsigned long vsid,
+ unsigned long addr,
+ unsigned char *hpte_slot_array,
+ int psize, int ssize, int local)
+{
+ WARN(1, "%s called without THP support\n", __func__);
+}
+#endif
static void pSeries_lpar_hpte_removebolted(unsigned long ea,
int psize, int ssize)
diff --git a/arch/powerpc/platforms/pseries/pseries.h b/arch/powerpc/platforms/pseries/pseries.h
index 8411c2729..7aa83f00a 100644
--- a/arch/powerpc/platforms/pseries/pseries.h
+++ b/arch/powerpc/platforms/pseries/pseries.h
@@ -73,6 +73,15 @@ static inline int dlpar_memory(struct pseries_hp_errorlog *hp_elog)
}
#endif
+#ifdef CONFIG_HOTPLUG_CPU
+int dlpar_cpu(struct pseries_hp_errorlog *hp_elog);
+#else
+static inline int dlpar_cpu(struct pseries_hp_errorlog *hp_elog)
+{
+ return -EOPNOTSUPP;
+}
+#endif
+
/* PCI root bridge prepare function override for pseries */
struct pci_host_bridge;
int pseries_root_bridge_prepare(struct pci_host_bridge *bridge);
diff --git a/arch/powerpc/platforms/pseries/ras.c b/arch/powerpc/platforms/pseries/ras.c
index 3b6647e57..9a3e27b86 100644
--- a/arch/powerpc/platforms/pseries/ras.c
+++ b/arch/powerpc/platforms/pseries/ras.c
@@ -40,6 +40,9 @@ static int ras_check_exception_token;
#define EPOW_SENSOR_TOKEN 9
#define EPOW_SENSOR_INDEX 0
+/* EPOW events counter variable */
+static int num_epow_events;
+
static irqreturn_t ras_epow_interrupt(int irq, void *dev_id);
static irqreturn_t ras_error_interrupt(int irq, void *dev_id);
@@ -82,32 +85,30 @@ static void handle_system_shutdown(char event_modifier)
{
switch (event_modifier) {
case EPOW_SHUTDOWN_NORMAL:
- pr_emerg("Firmware initiated power off");
+ pr_emerg("Power off requested\n");
orderly_poweroff(true);
break;
case EPOW_SHUTDOWN_ON_UPS:
- pr_emerg("Loss of power reported by firmware, system is "
- "running on UPS/battery");
- pr_emerg("Check RTAS error log for details");
+ pr_emerg("Loss of system power detected. System is running on"
+ " UPS/battery. Check RTAS error log for details\n");
orderly_poweroff(true);
break;
case EPOW_SHUTDOWN_LOSS_OF_CRITICAL_FUNCTIONS:
- pr_emerg("Loss of system critical functions reported by "
- "firmware");
- pr_emerg("Check RTAS error log for details");
+ pr_emerg("Loss of system critical functions detected. Check"
+ " RTAS error log for details\n");
orderly_poweroff(true);
break;
case EPOW_SHUTDOWN_AMBIENT_TEMPERATURE_TOO_HIGH:
- pr_emerg("Ambient temperature too high reported by firmware");
- pr_emerg("Check RTAS error log for details");
+ pr_emerg("High ambient temperature detected. Check RTAS"
+ " error log for details\n");
orderly_poweroff(true);
break;
default:
- pr_err("Unknown power/cooling shutdown event (modifier %d)",
+ pr_err("Unknown power/cooling shutdown event (modifier = %d)\n",
event_modifier);
}
}
@@ -145,17 +146,20 @@ static void rtas_parse_epow_errlog(struct rtas_error_log *log)
switch (action_code) {
case EPOW_RESET:
- pr_err("Non critical power or cooling issue cleared");
+ if (num_epow_events) {
+ pr_info("Non critical power/cooling issue cleared\n");
+ num_epow_events--;
+ }
break;
case EPOW_WARN_COOLING:
- pr_err("Non critical cooling issue reported by firmware");
- pr_err("Check RTAS error log for details");
+ pr_info("Non-critical cooling issue detected. Check RTAS error"
+ " log for details\n");
break;
case EPOW_WARN_POWER:
- pr_err("Non critical power issue reported by firmware");
- pr_err("Check RTAS error log for details");
+ pr_info("Non-critical power issue detected. Check RTAS error"
+ " log for details\n");
break;
case EPOW_SYSTEM_SHUTDOWN:
@@ -163,23 +167,27 @@ static void rtas_parse_epow_errlog(struct rtas_error_log *log)
break;
case EPOW_SYSTEM_HALT:
- pr_emerg("Firmware initiated power off");
+ pr_emerg("Critical power/cooling issue detected. Check RTAS"
+ " error log for details. Powering off.\n");
orderly_poweroff(true);
break;
case EPOW_MAIN_ENCLOSURE:
case EPOW_POWER_OFF:
- pr_emerg("Critical power/cooling issue reported by firmware");
- pr_emerg("Check RTAS error log for details");
- pr_emerg("Immediate power off");
+ pr_emerg("System about to lose power. Check RTAS error log "
+ " for details. Powering off immediately.\n");
emergency_sync();
kernel_power_off();
break;
default:
- pr_err("Unknown power/cooling event (action code %d)",
+ pr_err("Unknown power/cooling event (action code = %d)\n",
action_code);
}
+
+ /* Increment epow events counter variable */
+ if (action_code != EPOW_RESET)
+ num_epow_events++;
}
/* Handle environmental and power warning (EPOW) interrupts. */
@@ -249,13 +257,12 @@ static irqreturn_t ras_error_interrupt(int irq, void *dev_id)
log_error(ras_log_buf, ERR_TYPE_RTAS_LOG, fatal);
if (fatal) {
- pr_emerg("Fatal hardware error reported by firmware");
- pr_emerg("Check RTAS error log for details");
- pr_emerg("Immediate power off");
+ pr_emerg("Fatal hardware error detected. Check RTAS error"
+ " log for details. Powering off immediately\n");
emergency_sync();
kernel_power_off();
} else {
- pr_err("Recoverable hardware error reported by firmware");
+ pr_err("Recoverable hardware error detected\n");
}
spin_unlock(&ras_log_buf_lock);