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authorMichael Ellerman <mpe@ellerman.id.au>2015-04-13 08:29:36 +0300
committerMichael Ellerman <mpe@ellerman.id.au>2015-04-13 08:30:21 +0300
commit3a29dd6d6f445212ddbcf43a2ba6352127ce9ee8 (patch)
treee05aad022c46d0550f2c9dc8d4361a6634591852 /arch
parentf7e9e358362557c3aa2c1ec47490f29fe880a09e (diff)
parent51925fb3c5c901aa06cdc853268a6e19e19bcdc7 (diff)
downloadlinux-3a29dd6d6f445212ddbcf43a2ba6352127ce9ee8.tar.xz
Merge branch 'next-dlpar' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc into next
Merge series from Nathan Fontenot to do memory hotplug in the kernel.
Diffstat (limited to 'arch')
-rw-r--r--arch/powerpc/include/asm/rtas.h26
-rw-r--r--arch/powerpc/platforms/pseries/dlpar.c118
-rw-r--r--arch/powerpc/platforms/pseries/hotplug-memory.c473
-rw-r--r--arch/powerpc/platforms/pseries/pseries.h12
4 files changed, 627 insertions, 2 deletions
diff --git a/arch/powerpc/include/asm/rtas.h b/arch/powerpc/include/asm/rtas.h
index 398106f12617..7a4ede16b283 100644
--- a/arch/powerpc/include/asm/rtas.h
+++ b/arch/powerpc/include/asm/rtas.h
@@ -274,6 +274,7 @@ inline uint32_t rtas_ext_event_company_id(struct rtas_ext_event_log_v6 *ext_log)
#define PSERIES_ELOG_SECT_ID_MANUFACT_INFO (('M' << 8) | 'I')
#define PSERIES_ELOG_SECT_ID_CALL_HOME (('C' << 8) | 'H')
#define PSERIES_ELOG_SECT_ID_USER_DEF (('U' << 8) | 'D')
+#define PSERIES_ELOG_SECT_ID_HOTPLUG (('H' << 8) | 'P')
/* Vendor specific Platform Event Log Format, Version 6, section header */
struct pseries_errorlog {
@@ -297,6 +298,31 @@ inline uint16_t pseries_errorlog_length(struct pseries_errorlog *sect)
return be16_to_cpu(sect->length);
}
+/* RTAS pseries hotplug errorlog section */
+struct pseries_hp_errorlog {
+ u8 resource;
+ u8 action;
+ u8 id_type;
+ u8 reserved;
+ union {
+ __be32 drc_index;
+ __be32 drc_count;
+ char drc_name[1];
+ } _drc_u;
+};
+
+#define PSERIES_HP_ELOG_RESOURCE_CPU 1
+#define PSERIES_HP_ELOG_RESOURCE_MEM 2
+#define PSERIES_HP_ELOG_RESOURCE_SLOT 3
+#define PSERIES_HP_ELOG_RESOURCE_PHB 4
+
+#define PSERIES_HP_ELOG_ACTION_ADD 1
+#define PSERIES_HP_ELOG_ACTION_REMOVE 2
+
+#define PSERIES_HP_ELOG_ID_DRC_NAME 1
+#define PSERIES_HP_ELOG_ID_DRC_INDEX 2
+#define PSERIES_HP_ELOG_ID_DRC_COUNT 3
+
struct pseries_errorlog *get_pseries_errorlog(struct rtas_error_log *log,
uint16_t section_id);
diff --git a/arch/powerpc/platforms/pseries/dlpar.c b/arch/powerpc/platforms/pseries/dlpar.c
index c22bb1b4beb8..b4b11096ea8b 100644
--- a/arch/powerpc/platforms/pseries/dlpar.c
+++ b/arch/powerpc/platforms/pseries/dlpar.c
@@ -10,6 +10,8 @@
* 2 as published by the Free Software Foundation.
*/
+#define pr_fmt(fmt) "dlpar: " fmt
+
#include <linux/kernel.h>
#include <linux/notifier.h>
#include <linux/spinlock.h>
@@ -535,13 +537,125 @@ static ssize_t dlpar_cpu_release(const char *buf, size_t count)
return count;
}
+#endif /* CONFIG_ARCH_CPU_PROBE_RELEASE */
+
+static int handle_dlpar_errorlog(struct pseries_hp_errorlog *hp_elog)
+{
+ int rc;
+
+ /* pseries error logs are in BE format, convert to cpu type */
+ switch (hp_elog->id_type) {
+ case PSERIES_HP_ELOG_ID_DRC_COUNT:
+ hp_elog->_drc_u.drc_count =
+ be32_to_cpu(hp_elog->_drc_u.drc_count);
+ break;
+ case PSERIES_HP_ELOG_ID_DRC_INDEX:
+ hp_elog->_drc_u.drc_index =
+ be32_to_cpu(hp_elog->_drc_u.drc_index);
+ }
+
+ switch (hp_elog->resource) {
+ case PSERIES_HP_ELOG_RESOURCE_MEM:
+ rc = dlpar_memory(hp_elog);
+ break;
+ default:
+ pr_warn_ratelimited("Invalid resource (%d) specified\n",
+ hp_elog->resource);
+ rc = -EINVAL;
+ }
+
+ return rc;
+}
+
+static ssize_t dlpar_store(struct class *class, struct class_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct pseries_hp_errorlog *hp_elog;
+ const char *arg;
+ int rc;
+
+ hp_elog = kzalloc(sizeof(*hp_elog), GFP_KERNEL);
+ if (!hp_elog) {
+ rc = -ENOMEM;
+ goto dlpar_store_out;
+ }
+
+ /* Parse out the request from the user, this will be in the form
+ * <resource> <action> <id_type> <id>
+ */
+ arg = buf;
+ if (!strncmp(arg, "memory", 6)) {
+ hp_elog->resource = PSERIES_HP_ELOG_RESOURCE_MEM;
+ arg += strlen("memory ");
+ } else {
+ pr_err("Invalid resource specified: \"%s\"\n", buf);
+ rc = -EINVAL;
+ goto dlpar_store_out;
+ }
+
+ if (!strncmp(arg, "add", 3)) {
+ hp_elog->action = PSERIES_HP_ELOG_ACTION_ADD;
+ arg += strlen("add ");
+ } else if (!strncmp(arg, "remove", 6)) {
+ hp_elog->action = PSERIES_HP_ELOG_ACTION_REMOVE;
+ arg += strlen("remove ");
+ } else {
+ pr_err("Invalid action specified: \"%s\"\n", buf);
+ rc = -EINVAL;
+ goto dlpar_store_out;
+ }
+
+ if (!strncmp(arg, "index", 5)) {
+ u32 index;
+
+ hp_elog->id_type = PSERIES_HP_ELOG_ID_DRC_INDEX;
+ arg += strlen("index ");
+ if (kstrtou32(arg, 0, &index)) {
+ rc = -EINVAL;
+ pr_err("Invalid drc_index specified: \"%s\"\n", buf);
+ goto dlpar_store_out;
+ }
+
+ hp_elog->_drc_u.drc_index = cpu_to_be32(index);
+ } else if (!strncmp(arg, "count", 5)) {
+ u32 count;
+
+ hp_elog->id_type = PSERIES_HP_ELOG_ID_DRC_COUNT;
+ arg += strlen("count ");
+ if (kstrtou32(arg, 0, &count)) {
+ rc = -EINVAL;
+ pr_err("Invalid count specified: \"%s\"\n", buf);
+ goto dlpar_store_out;
+ }
+
+ hp_elog->_drc_u.drc_count = cpu_to_be32(count);
+ } else {
+ pr_err("Invalid id_type specified: \"%s\"\n", buf);
+ rc = -EINVAL;
+ goto dlpar_store_out;
+ }
+
+ rc = handle_dlpar_errorlog(hp_elog);
+
+dlpar_store_out:
+ kfree(hp_elog);
+ return rc ? rc : count;
+}
+
+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 */
- return 0;
+ rc = sysfs_create_file(kernel_kobj, &class_attr_dlpar.attr);
+
+ return rc;
}
machine_device_initcall(pseries, pseries_dlpar_init);
-#endif /* CONFIG_ARCH_CPU_PROBE_RELEASE */
diff --git a/arch/powerpc/platforms/pseries/hotplug-memory.c b/arch/powerpc/platforms/pseries/hotplug-memory.c
index fa41f0da5b6f..742ef88ffd7b 100644
--- a/arch/powerpc/platforms/pseries/hotplug-memory.c
+++ b/arch/powerpc/platforms/pseries/hotplug-memory.c
@@ -9,11 +9,14 @@
* 2 of the License, or (at your option) any later version.
*/
+#define pr_fmt(fmt) "pseries-hotplug-mem: " fmt
+
#include <linux/of.h>
#include <linux/of_address.h>
#include <linux/memblock.h>
#include <linux/memory.h>
#include <linux/memory_hotplug.h>
+#include <linux/slab.h>
#include <asm/firmware.h>
#include <asm/machdep.h>
@@ -21,6 +24,8 @@
#include <asm/sparsemem.h>
#include "pseries.h"
+static bool rtas_hp_event;
+
unsigned long pseries_memory_block_size(void)
{
struct device_node *np;
@@ -64,6 +69,67 @@ unsigned long pseries_memory_block_size(void)
return memblock_size;
}
+static void dlpar_free_drconf_property(struct property *prop)
+{
+ kfree(prop->name);
+ kfree(prop->value);
+ kfree(prop);
+}
+
+static struct property *dlpar_clone_drconf_property(struct device_node *dn)
+{
+ struct property *prop, *new_prop;
+ struct of_drconf_cell *lmbs;
+ u32 num_lmbs, *p;
+ int i;
+
+ prop = of_find_property(dn, "ibm,dynamic-memory", NULL);
+ if (!prop)
+ return NULL;
+
+ new_prop = kzalloc(sizeof(*new_prop), GFP_KERNEL);
+ if (!new_prop)
+ return NULL;
+
+ new_prop->name = kstrdup(prop->name, GFP_KERNEL);
+ new_prop->value = kmalloc(prop->length, GFP_KERNEL);
+ if (!new_prop->name || !new_prop->value) {
+ dlpar_free_drconf_property(new_prop);
+ return NULL;
+ }
+
+ memcpy(new_prop->value, prop->value, prop->length);
+ new_prop->length = prop->length;
+
+ /* Convert the property to cpu endian-ness */
+ p = new_prop->value;
+ *p = be32_to_cpu(*p);
+
+ num_lmbs = *p++;
+ lmbs = (struct of_drconf_cell *)p;
+
+ for (i = 0; i < num_lmbs; i++) {
+ lmbs[i].base_addr = be64_to_cpu(lmbs[i].base_addr);
+ lmbs[i].drc_index = be32_to_cpu(lmbs[i].drc_index);
+ lmbs[i].flags = be32_to_cpu(lmbs[i].flags);
+ }
+
+ return new_prop;
+}
+
+static struct memory_block *lmb_to_memblock(struct of_drconf_cell *lmb)
+{
+ unsigned long section_nr;
+ struct mem_section *mem_sect;
+ struct memory_block *mem_block;
+
+ section_nr = pfn_to_section_nr(PFN_DOWN(lmb->base_addr));
+ mem_sect = __nr_to_section(section_nr);
+
+ mem_block = find_memory_block(mem_sect);
+ return mem_block;
+}
+
#ifdef CONFIG_MEMORY_HOTREMOVE
static int pseries_remove_memblock(unsigned long base, unsigned int memblock_size)
{
@@ -122,6 +188,173 @@ static int pseries_remove_mem_node(struct device_node *np)
pseries_remove_memblock(base, lmb_size);
return 0;
}
+
+static bool lmb_is_removable(struct of_drconf_cell *lmb)
+{
+ int i, scns_per_block;
+ int rc = 1;
+ unsigned long pfn, block_sz;
+ u64 phys_addr;
+
+ if (!(lmb->flags & DRCONF_MEM_ASSIGNED))
+ return false;
+
+ block_sz = memory_block_size_bytes();
+ scns_per_block = block_sz / MIN_MEMORY_BLOCK_SIZE;
+ phys_addr = lmb->base_addr;
+
+ for (i = 0; i < scns_per_block; i++) {
+ pfn = PFN_DOWN(phys_addr);
+ if (!pfn_present(pfn))
+ continue;
+
+ rc &= is_mem_section_removable(pfn, PAGES_PER_SECTION);
+ phys_addr += MIN_MEMORY_BLOCK_SIZE;
+ }
+
+ return rc ? true : false;
+}
+
+static int dlpar_add_lmb(struct of_drconf_cell *);
+
+static int dlpar_remove_lmb(struct of_drconf_cell *lmb)
+{
+ struct memory_block *mem_block;
+ unsigned long block_sz;
+ int nid, rc;
+
+ if (!lmb_is_removable(lmb))
+ return -EINVAL;
+
+ mem_block = lmb_to_memblock(lmb);
+ if (!mem_block)
+ return -EINVAL;
+
+ rc = device_offline(&mem_block->dev);
+ put_device(&mem_block->dev);
+ if (rc)
+ return rc;
+
+ block_sz = pseries_memory_block_size();
+ nid = memory_add_physaddr_to_nid(lmb->base_addr);
+
+ remove_memory(nid, lmb->base_addr, block_sz);
+
+ /* Update memory regions for memory remove */
+ memblock_remove(lmb->base_addr, block_sz);
+
+ dlpar_release_drc(lmb->drc_index);
+
+ lmb->flags &= ~DRCONF_MEM_ASSIGNED;
+ return 0;
+}
+
+static int dlpar_memory_remove_by_count(u32 lmbs_to_remove,
+ struct property *prop)
+{
+ struct of_drconf_cell *lmbs;
+ int lmbs_removed = 0;
+ int lmbs_available = 0;
+ u32 num_lmbs, *p;
+ int i, rc;
+
+ pr_info("Attempting to hot-remove %d LMB(s)\n", lmbs_to_remove);
+
+ if (lmbs_to_remove == 0)
+ return -EINVAL;
+
+ p = prop->value;
+ num_lmbs = *p++;
+ lmbs = (struct of_drconf_cell *)p;
+
+ /* Validate that there are enough LMBs to satisfy the request */
+ for (i = 0; i < num_lmbs; i++) {
+ if (lmbs[i].flags & DRCONF_MEM_ASSIGNED)
+ lmbs_available++;
+ }
+
+ if (lmbs_available < lmbs_to_remove)
+ return -EINVAL;
+
+ for (i = 0; i < num_lmbs && lmbs_removed < lmbs_to_remove; i++) {
+ rc = dlpar_remove_lmb(&lmbs[i]);
+ if (rc)
+ continue;
+
+ lmbs_removed++;
+
+ /* Mark this lmb so we can add it later if all of the
+ * requested LMBs cannot be removed.
+ */
+ lmbs[i].reserved = 1;
+ }
+
+ if (lmbs_removed != lmbs_to_remove) {
+ pr_err("Memory hot-remove failed, adding LMB's back\n");
+
+ for (i = 0; i < num_lmbs; i++) {
+ if (!lmbs[i].reserved)
+ continue;
+
+ rc = dlpar_add_lmb(&lmbs[i]);
+ if (rc)
+ pr_err("Failed to add LMB back, drc index %x\n",
+ lmbs[i].drc_index);
+
+ lmbs[i].reserved = 0;
+ }
+
+ rc = -EINVAL;
+ } else {
+ for (i = 0; i < num_lmbs; i++) {
+ if (!lmbs[i].reserved)
+ continue;
+
+ pr_info("Memory at %llx was hot-removed\n",
+ lmbs[i].base_addr);
+
+ lmbs[i].reserved = 0;
+ }
+ rc = 0;
+ }
+
+ return rc;
+}
+
+static int dlpar_memory_remove_by_index(u32 drc_index, struct property *prop)
+{
+ struct of_drconf_cell *lmbs;
+ u32 num_lmbs, *p;
+ int lmb_found;
+ int i, rc;
+
+ pr_info("Attempting to hot-remove LMB, drc index %x\n", drc_index);
+
+ p = prop->value;
+ num_lmbs = *p++;
+ lmbs = (struct of_drconf_cell *)p;
+
+ lmb_found = 0;
+ for (i = 0; i < num_lmbs; i++) {
+ if (lmbs[i].drc_index == drc_index) {
+ lmb_found = 1;
+ rc = dlpar_remove_lmb(&lmbs[i]);
+ break;
+ }
+ }
+
+ if (!lmb_found)
+ rc = -EINVAL;
+
+ if (rc)
+ pr_info("Failed to hot-remove memory at %llx\n",
+ lmbs[i].base_addr);
+ else
+ pr_info("Memory at %llx was hot-removed\n", lmbs[i].base_addr);
+
+ return rc;
+}
+
#else
static inline int pseries_remove_memblock(unsigned long base,
unsigned int memblock_size)
@@ -132,8 +365,245 @@ static inline int pseries_remove_mem_node(struct device_node *np)
{
return 0;
}
+static inline int dlpar_memory_remove(struct pseries_hp_errorlog *hp_elog)
+{
+ return -EOPNOTSUPP;
+}
+
#endif /* CONFIG_MEMORY_HOTREMOVE */
+static int dlpar_add_lmb(struct of_drconf_cell *lmb)
+{
+ struct memory_block *mem_block;
+ unsigned long block_sz;
+ int nid, rc;
+
+ if (lmb->flags & DRCONF_MEM_ASSIGNED)
+ return -EINVAL;
+
+ block_sz = memory_block_size_bytes();
+
+ rc = dlpar_acquire_drc(lmb->drc_index);
+ if (rc)
+ return rc;
+
+ /* Find the node id for this address */
+ nid = memory_add_physaddr_to_nid(lmb->base_addr);
+
+ /* Add the memory */
+ rc = add_memory(nid, lmb->base_addr, block_sz);
+ if (rc) {
+ dlpar_release_drc(lmb->drc_index);
+ return rc;
+ }
+
+ /* Register this block of memory */
+ rc = memblock_add(lmb->base_addr, block_sz);
+ if (rc) {
+ remove_memory(nid, lmb->base_addr, block_sz);
+ dlpar_release_drc(lmb->drc_index);
+ return rc;
+ }
+
+ mem_block = lmb_to_memblock(lmb);
+ if (!mem_block) {
+ remove_memory(nid, lmb->base_addr, block_sz);
+ dlpar_release_drc(lmb->drc_index);
+ return -EINVAL;
+ }
+
+ rc = device_online(&mem_block->dev);
+ put_device(&mem_block->dev);
+ if (rc) {
+ remove_memory(nid, lmb->base_addr, block_sz);
+ dlpar_release_drc(lmb->drc_index);
+ return rc;
+ }
+
+ lmb->flags |= DRCONF_MEM_ASSIGNED;
+ return 0;
+}
+
+static int dlpar_memory_add_by_count(u32 lmbs_to_add, struct property *prop)
+{
+ struct of_drconf_cell *lmbs;
+ u32 num_lmbs, *p;
+ int lmbs_available = 0;
+ int lmbs_added = 0;
+ int i, rc;
+
+ pr_info("Attempting to hot-add %d LMB(s)\n", lmbs_to_add);
+
+ if (lmbs_to_add == 0)
+ return -EINVAL;
+
+ p = prop->value;
+ num_lmbs = *p++;
+ lmbs = (struct of_drconf_cell *)p;
+
+ /* Validate that there are enough LMBs to satisfy the request */
+ for (i = 0; i < num_lmbs; i++) {
+ if (!(lmbs[i].flags & DRCONF_MEM_ASSIGNED))
+ lmbs_available++;
+ }
+
+ if (lmbs_available < lmbs_to_add)
+ return -EINVAL;
+
+ for (i = 0; i < num_lmbs && lmbs_to_add != lmbs_added; i++) {
+ rc = dlpar_add_lmb(&lmbs[i]);
+ if (rc)
+ continue;
+
+ lmbs_added++;
+
+ /* Mark this lmb so we can remove it later if all of the
+ * requested LMBs cannot be added.
+ */
+ lmbs[i].reserved = 1;
+ }
+
+ if (lmbs_added != lmbs_to_add) {
+ pr_err("Memory hot-add failed, removing any added LMBs\n");
+
+ for (i = 0; i < num_lmbs; i++) {
+ if (!lmbs[i].reserved)
+ continue;
+
+ rc = dlpar_remove_lmb(&lmbs[i]);
+ if (rc)
+ pr_err("Failed to remove LMB, drc index %x\n",
+ be32_to_cpu(lmbs[i].drc_index));
+ }
+ rc = -EINVAL;
+ } else {
+ for (i = 0; i < num_lmbs; i++) {
+ if (!lmbs[i].reserved)
+ continue;
+
+ pr_info("Memory at %llx (drc index %x) was hot-added\n",
+ lmbs[i].base_addr, lmbs[i].drc_index);
+ lmbs[i].reserved = 0;
+ }
+ }
+
+ return rc;
+}
+
+static int dlpar_memory_add_by_index(u32 drc_index, struct property *prop)
+{
+ struct of_drconf_cell *lmbs;
+ u32 num_lmbs, *p;
+ int i, lmb_found;
+ int rc;
+
+ pr_info("Attempting to hot-add LMB, drc index %x\n", drc_index);
+
+ p = prop->value;
+ num_lmbs = *p++;
+ lmbs = (struct of_drconf_cell *)p;
+
+ lmb_found = 0;
+ for (i = 0; i < num_lmbs; i++) {
+ if (lmbs[i].drc_index == drc_index) {
+ lmb_found = 1;
+ rc = dlpar_add_lmb(&lmbs[i]);
+ break;
+ }
+ }
+
+ if (!lmb_found)
+ rc = -EINVAL;
+
+ if (rc)
+ pr_info("Failed to hot-add memory, drc index %x\n", drc_index);
+ else
+ pr_info("Memory at %llx (drc index %x) was hot-added\n",
+ lmbs[i].base_addr, drc_index);
+
+ return rc;
+}
+
+static void dlpar_update_drconf_property(struct device_node *dn,
+ struct property *prop)
+{
+ struct of_drconf_cell *lmbs;
+ u32 num_lmbs, *p;
+ int i;
+
+ /* Convert the property back to BE */
+ p = prop->value;
+ num_lmbs = *p;
+ *p = cpu_to_be32(*p);
+ p++;
+
+ lmbs = (struct of_drconf_cell *)p;
+ for (i = 0; i < num_lmbs; i++) {
+ lmbs[i].base_addr = cpu_to_be64(lmbs[i].base_addr);
+ lmbs[i].drc_index = cpu_to_be32(lmbs[i].drc_index);
+ lmbs[i].flags = cpu_to_be32(lmbs[i].flags);
+ }
+
+ rtas_hp_event = true;
+ of_update_property(dn, prop);
+ rtas_hp_event = false;
+}
+
+int dlpar_memory(struct pseries_hp_errorlog *hp_elog)
+{
+ struct device_node *dn;
+ struct property *prop;
+ u32 count, drc_index;
+ int rc;
+
+ count = hp_elog->_drc_u.drc_count;
+ drc_index = hp_elog->_drc_u.drc_index;
+
+ lock_device_hotplug();
+
+ dn = of_find_node_by_path("/ibm,dynamic-reconfiguration-memory");
+ if (!dn)
+ return -EINVAL;
+
+ prop = dlpar_clone_drconf_property(dn);
+ if (!prop) {
+ of_node_put(dn);
+ return -EINVAL;
+ }
+
+ switch (hp_elog->action) {
+ case PSERIES_HP_ELOG_ACTION_ADD:
+ if (hp_elog->id_type == PSERIES_HP_ELOG_ID_DRC_COUNT)
+ rc = dlpar_memory_add_by_count(count, prop);
+ else if (hp_elog->id_type == PSERIES_HP_ELOG_ID_DRC_INDEX)
+ rc = dlpar_memory_add_by_index(drc_index, prop);
+ else
+ rc = -EINVAL;
+ break;
+ case PSERIES_HP_ELOG_ACTION_REMOVE:
+ if (hp_elog->id_type == PSERIES_HP_ELOG_ID_DRC_COUNT)
+ rc = dlpar_memory_remove_by_count(count, prop);
+ else if (hp_elog->id_type == PSERIES_HP_ELOG_ID_DRC_INDEX)
+ rc = dlpar_memory_remove_by_index(drc_index, prop);
+ else
+ rc = -EINVAL;
+ break;
+ default:
+ pr_err("Invalid action (%d) specified\n", hp_elog->action);
+ rc = -EINVAL;
+ break;
+ }
+
+ if (rc)
+ dlpar_free_drconf_property(prop);
+ else
+ dlpar_update_drconf_property(dn, prop);
+
+ of_node_put(dn);
+ unlock_device_hotplug();
+ return rc;
+}
+
static int pseries_add_mem_node(struct device_node *np)
{
const char *type;
@@ -174,6 +644,9 @@ static int pseries_update_drconf_memory(struct of_reconfig_data *pr)
__be32 *p;
int i, rc = -EINVAL;
+ if (rtas_hp_event)
+ return 0;
+
memblock_size = pseries_memory_block_size();
if (!memblock_size)
return -EINVAL;
diff --git a/arch/powerpc/platforms/pseries/pseries.h b/arch/powerpc/platforms/pseries/pseries.h
index cd64672e24f8..8411c27293e4 100644
--- a/arch/powerpc/platforms/pseries/pseries.h
+++ b/arch/powerpc/platforms/pseries/pseries.h
@@ -11,6 +11,7 @@
#define _PSERIES_PSERIES_H
#include <linux/interrupt.h>
+#include <asm/rtas.h>
struct device_node;
@@ -60,6 +61,17 @@ extern struct device_node *dlpar_configure_connector(__be32,
struct device_node *);
extern int dlpar_attach_node(struct device_node *);
extern int dlpar_detach_node(struct device_node *);
+extern int dlpar_acquire_drc(u32 drc_index);
+extern int dlpar_release_drc(u32 drc_index);
+
+#ifdef CONFIG_MEMORY_HOTPLUG
+int dlpar_memory(struct pseries_hp_errorlog *hp_elog);
+#else
+static inline int dlpar_memory(struct pseries_hp_errorlog *hp_elog)
+{
+ return -EOPNOTSUPP;
+}
+#endif
/* PCI root bridge prepare function override for pseries */
struct pci_host_bridge;