[PATCH v3] powerpc/powernv Platform dump interface
Vasant Hegde
hegdevasant at linux.vnet.ibm.com
Tue Mar 4 23:22:42 EST 2014
On 03/03/2014 04:55 AM, Stewart Smith wrote:
> This enables support for userspace to fetch and initiate FSP and
> Platform dumps from the service processor (via firmware) through sysfs.
>
> Based on original patch from Vasant Hegde <hegdevasant at linux.vnet.ibm.com>
>
> Flow:
> - We register for OPAL notification events.
> - OPAL sends new dump available notification.
> - We make information on dump available via sysfs
> - Userspace requests dump contents
> - We retrieve the dump via OPAL interface
> - User copies the dump data
> - userspace sends ack for dump
> - We send ACK to OPAL.
>
> sysfs files:
> - We add the /sys/firmware/opal/dump directory
> - echoing 1 (well, anything, but in future we may support
> different dump types) to /sys/firmware/opal/dump/initiate_dump
> will initiate a dump.
Stewart,
s/initiate/initiate FSP/
> - Each dump that we've been notified of gets a directory
> in /sys/firmware/opal/dump/ with a name of the dump type and ID (in hex,
> as this is what's used elsewhere to identify the dump).
> - Each dump has files: id, type, dump and acknowledge
> dump is binary and is the dump itself.
> echoing 'ack' to acknowledge (currently any string will do) will
> acknowledge the dump and it will soon after disappear from sysfs.
>
> OPAL APIs:
> - opal_dump_init()
> - opal_dump_info()
opal_dump_info2()
> - opal_dump_read()
> - opal_dump_ack()
> - opal_dump_resend_notification()
>
> Currently we are only ever notified for one dump at a time (until
> the user explicitly acks the current dump, then we get a notification
> of the next dump), but this kernel code should "just work" when OPAL
> starts notifying us of all the dumps present.
>
> Changes since v2:
> - fix bug where we would free the dump buffer after userspace read it,
> refetching if needed. Refetching doesn't currently work, so we must
> keep the dump around for subsequent reads.
>
> Changes since v1:
> - Add support for getting dump type from OPAL through new OPAL call
> (falling back to old OPAL_DUMP_INFO call if OPAL_DUMP_INFO2 isn't
> supported)
> - use dump type in directory name for dump
>
> Signed-off-by: Stewart Smith <stewart at linux.vnet.ibm.com>
> ---
> Documentation/ABI/stable/sysfs-firmware-opal-dump | 41 ++
> arch/powerpc/include/asm/opal.h | 14 +
> arch/powerpc/platforms/powernv/Makefile | 2 +-
> arch/powerpc/platforms/powernv/opal-dump.c | 525 +++++++++++++++++++++
> arch/powerpc/platforms/powernv/opal-wrappers.S | 6 +
> arch/powerpc/platforms/powernv/opal.c | 2 +
> 6 files changed, 589 insertions(+), 1 deletion(-)
> create mode 100644 Documentation/ABI/stable/sysfs-firmware-opal-dump
> create mode 100644 arch/powerpc/platforms/powernv/opal-dump.c
>
> diff --git a/Documentation/ABI/stable/sysfs-firmware-opal-dump b/Documentation/ABI/stable/sysfs-firmware-opal-dump
> new file mode 100644
> index 0000000..32fe7f5
> --- /dev/null
> +++ b/Documentation/ABI/stable/sysfs-firmware-opal-dump
> @@ -0,0 +1,41 @@
> +What: /sys/firmware/opal/dump
> +Date: Feb 2014
> +Contact: Stewart Smith <stewart at linux.vnet.ibm.com>
> +Description:
> + This directory exposes interfaces for interacting with
> + the FSP and platform dumps through OPAL firmware interface.
> +
> + This is only for the powerpc/powernv platform.
> +
> + initiate_dump: When '1' is written to it,
> + we will initiate a dump.
initiate FSP dump
> + Read this file for supported commands.
> +
> + 0xXX-0xYYYY: A directory for dump of type 0xXX and
> + id 0xYYYY (in hex). The name of this
> + directory should not be relied upon to
> + be in this format, only that it's unique
> + among all dumps. For determining the type
> + and ID of the dump, use the id and type files.
> + Do not rely on any particular size of dump
> + type or dump id.
> +
> + Each dump has the following files:
> + id: An ASCII representation of the dump ID
> + in hex (e.g. '0x01')
> + type: An ASCII representation of the type of
> + dump in the format "0x%x %s" with the ID
Better 0x%x - %s ?
> + in hex and a description of the dump type
> + (or 'unknown').
> + Type '0xffffffff unknown' is used when
> + we could not get the type from firmware.
> + e.g. '0x02 System/Platform Dump'
> + dump: A binary file containing the dump.
> + The size of the dump is the size of this file.
> + acknowledge: When 'ack' is written to this, we will
> + acknowledge that we've retrieved the
> + dump to the service processor. It will
> + then remove it, making the dump
> + inaccessible.
> + Reading this file will get a list of
> + supported actions.
> diff --git a/arch/powerpc/include/asm/opal.h b/arch/powerpc/include/asm/opal.h
> index 40157e2..89c840c 100644
> --- a/arch/powerpc/include/asm/opal.h
> +++ b/arch/powerpc/include/asm/opal.h
> @@ -154,9 +154,15 @@ extern int opal_enter_rtas(struct rtas_args *args,
> #define OPAL_FLASH_VALIDATE 76
> #define OPAL_FLASH_MANAGE 77
> #define OPAL_FLASH_UPDATE 78
> +#define OPAL_DUMP_INIT 81
> +#define OPAL_DUMP_INFO 82
> +#define OPAL_DUMP_READ 83
> +#define OPAL_DUMP_ACK 84
> #define OPAL_GET_MSG 85
> #define OPAL_CHECK_ASYNC_COMPLETION 86
> +#define OPAL_DUMP_RESEND 91
> #define OPAL_SYNC_HOST_REBOOT 87
> +#define OPAL_DUMP_INFO2 94
>
> #ifndef __ASSEMBLY__
>
> @@ -237,6 +243,7 @@ enum OpalPendingState {
> OPAL_EVENT_EPOW = 0x80,
> OPAL_EVENT_LED_STATUS = 0x100,
> OPAL_EVENT_PCI_ERROR = 0x200,
> + OPAL_EVENT_DUMP_AVAIL = 0x400,
> OPAL_EVENT_MSG_PENDING = 0x800,
> };
>
> @@ -826,6 +833,12 @@ int64_t opal_lpc_read(uint32_t chip_id, enum OpalLPCAddressType addr_type,
> int64_t opal_validate_flash(uint64_t buffer, uint32_t *size, uint32_t *result);
> int64_t opal_manage_flash(uint8_t op);
> int64_t opal_update_flash(uint64_t blk_list);
> +int64_t opal_dump_init(uint8_t dump_type);
> +int64_t opal_dump_info(uint32_t *dump_id, uint32_t *dump_size);
> +int64_t opal_dump_info2(uint32_t *dump_id, uint32_t *dump_size, uint32_t *dump_type);
> +int64_t opal_dump_read(uint32_t dump_id, uint64_t buffer);
> +int64_t opal_dump_ack(uint32_t dump_id);
> +int64_t opal_dump_resend_notification(void);
>
> int64_t opal_get_msg(uint64_t buffer, size_t size);
> int64_t opal_check_completion(uint64_t buffer, size_t size, uint64_t token);
> @@ -861,6 +874,7 @@ extern void opal_get_rtc_time(struct rtc_time *tm);
> extern unsigned long opal_get_boot_time(void);
> extern void opal_nvram_init(void);
> extern void opal_flash_init(void);
> +extern void opal_platform_dump_init(void);
>
> extern int opal_machine_check(struct pt_regs *regs);
>
> diff --git a/arch/powerpc/platforms/powernv/Makefile b/arch/powerpc/platforms/powernv/Makefile
> index 8d767fd..3528c11 100644
> --- a/arch/powerpc/platforms/powernv/Makefile
> +++ b/arch/powerpc/platforms/powernv/Makefile
> @@ -1,6 +1,6 @@
> obj-y += setup.o opal-takeover.o opal-wrappers.o opal.o
> obj-y += opal-rtc.o opal-nvram.o opal-lpc.o opal-flash.o
> -obj-y += rng.o
> +obj-y += rng.o opal-dump.o
>
> obj-$(CONFIG_SMP) += smp.o
> obj-$(CONFIG_PCI) += pci.o pci-p5ioc2.o pci-ioda.o
> diff --git a/arch/powerpc/platforms/powernv/opal-dump.c b/arch/powerpc/platforms/powernv/opal-dump.c
> new file mode 100644
> index 0000000..0c767c5
> --- /dev/null
> +++ b/arch/powerpc/platforms/powernv/opal-dump.c
> @@ -0,0 +1,525 @@
> +/*
> + * PowerNV OPAL Dump Interface
> + *
> + * Copyright 2013,2014 IBM Corp.
> + *
> + * This program is free software; you can redistribute it and/or
> + * modify it under the terms of the GNU General Public License
> + * as published by the Free Software Foundation; either version
> + * 2 of the License, or (at your option) any later version.
> + */
> +
> +#include <linux/kobject.h>
> +#include <linux/mm.h>
> +#include <linux/slab.h>
> +#include <linux/vmalloc.h>
> +#include <linux/pagemap.h>
> +#include <linux/delay.h>
> +
> +#include <asm/opal.h>
> +
> +#define DUMP_TYPE_FSP 0x01
Better define other dump type (sysdump etc) here and use it below ?
> +
> +struct dump_obj {
> + struct kobject kobj;
> + struct bin_attribute dump_attr;
> + uint32_t id; /* becomes object name */
> + uint32_t type;
> + uint32_t size;
> + char *buffer;
> +};
> +#define to_dump_obj(x) container_of(x, struct dump_obj, kobj)
> +
> +struct dump_attribute {
> + struct attribute attr;
> + ssize_t (*show)(struct dump_obj *dump, struct dump_attribute *attr,
> + char *buf);
> + ssize_t (*store)(struct dump_obj *dump, struct dump_attribute *attr,
> + const char *buf, size_t count);
> +};
> +#define to_dump_attr(x) container_of(x, struct dump_attribute, attr)
> +
> +static ssize_t dump_id_show(struct dump_obj *dump_obj,
> + struct dump_attribute *attr,
> + char *buf)
> +{
> + return sprintf(buf, "0x%x\n", dump_obj->id);
> +}
> +
> +static const char* dump_type_to_string(uint32_t type)
> +{
> + switch (type) {
> + case 0x01: return "SP Dump";
> + case 0x02: return "System/Platform Dump";
> + case 0x03: return "SMA Dump";
> + default: return "unknown";
> + }
> +}
> +
> +static ssize_t dump_type_show(struct dump_obj *dump_obj,
> + struct dump_attribute *attr,
> + char *buf)
> +{
> +
> + return sprintf(buf, "0x%x %s\n", dump_obj->type,
Better 0x%x - %s ?
> + dump_type_to_string(dump_obj->type));
> +}
> +
> +static ssize_t dump_ack_show(struct dump_obj *dump_obj,
> + struct dump_attribute *attr,
> + char *buf)
> +{
> + return sprintf(buf, "ack - acknowledge dump\n");
Not sure but better "echo ack - acknowledge dump"?
> +}
> +
> +/*
> + * Send acknowledgement to OPAL
> + */
> +static int64_t dump_send_ack(uint32_t dump_id)
> +{
> + int rc;
> +
> + rc = opal_dump_ack(dump_id);
> + if (rc)
> + pr_warn("%s: Failed to send ack to Dump ID 0x%x (%d)\n",
> + __func__, dump_id, rc);
> + return rc;
> +}
> +
> +static void delay_release_kobj(void *kobj)
> +{
> + kobject_put((struct kobject *)kobj);
> +}
> +
> +static ssize_t dump_ack_store(struct dump_obj *dump_obj,
> + struct dump_attribute *attr,
> + const char *buf,
> + size_t count)
> +{
> + dump_send_ack(dump_obj->id);
> + sysfs_schedule_callback(&dump_obj->kobj, delay_release_kobj,
> + &dump_obj->kobj, THIS_MODULE);
> + return count;
> +}
> +
> +/* Attributes of a dump
> + * The binary attribute of the dump itself is dynamic
> + * due to the dynamic size of the dump
> + */
> +static struct dump_attribute id_attribute =
> + __ATTR(id, 0666, dump_id_show, NULL);
> +static struct dump_attribute type_attribute =
> + __ATTR(type, 0666, dump_type_show, NULL);
> +static struct dump_attribute ack_attribute =
> + __ATTR(acknowledge, 0660, dump_ack_show, dump_ack_store);
> +
> +static ssize_t init_dump_show(struct dump_obj *dump_obj,
> + struct dump_attribute *attr,
> + char *buf)
> +{
> + return sprintf(buf, "1 - initiate dump\n");
initiate FSP dump
> +}
> +
> +static int64_t dump_fips_init(uint8_t type)
> +{
> + int rc;
> +
> + rc = opal_dump_init(type);
> + if (rc)
> + pr_warn("%s: Failed to initiate FipS dump (%d)\n",
> + __func__, rc);
> + return rc;
> +}
> +
> +static ssize_t init_dump_store(struct dump_obj *dump_obj,
> + struct dump_attribute *attr,
> + const char *buf,
> + size_t count)
> +{
> + dump_fips_init(DUMP_TYPE_FSP);
> + pr_info("%s: Initiated FSP dump\n", __func__);
This might mislead if OPAL fails to initiate FSP dump.. Better move this to
dump_fips_init () ?
> + return count;
> +}
> +
> +static struct dump_attribute initiate_attribute =
> + __ATTR(initiate_dump, 0600, init_dump_show, init_dump_store);
> +
> +static struct attribute *initiate_attrs[] = {
> + &initiate_attribute.attr,
> + NULL,
> +};
> +
> +static struct attribute_group initiate_attr_group = {
> + .attrs = initiate_attrs,
> +};
> +
> +static struct kset *dump_kset;
> +
> +static ssize_t dump_attr_show(struct kobject *kobj,
> + struct attribute *attr,
> + char *buf)
> +{
> + struct dump_attribute *attribute;
> + struct dump_obj *dump;
> +
> + attribute = to_dump_attr(attr);
> + dump = to_dump_obj(kobj);
> +
> + if (!attribute->show)
> + return -EIO;
> +
> + return attribute->show(dump, attribute, buf);
> +}
> +
> +static ssize_t dump_attr_store(struct kobject *kobj,
> + struct attribute *attr,
> + const char *buf, size_t len)
> +{
> + struct dump_attribute *attribute;
> + struct dump_obj *dump;
> +
> + attribute = to_dump_attr(attr);
> + dump = to_dump_obj(kobj);
> +
> + if (!attribute->store)
> + return -EIO;
> +
> + return attribute->store(dump, attribute, buf, len);
> +}
> +
> +static const struct sysfs_ops dump_sysfs_ops = {
> + .show = dump_attr_show,
> + .store = dump_attr_store,
> +};
> +
> +static void dump_release(struct kobject *kobj)
> +{
> + struct dump_obj *dump;
> +
> + dump = to_dump_obj(kobj);
> + vfree(dump->buffer);
> + kfree(dump);
> +}
> +
> +static struct attribute *dump_default_attrs[] = {
> + &id_attribute.attr,
> + &type_attribute.attr,
> + &ack_attribute.attr,
> + NULL,
> +};
> +
> +static struct kobj_type dump_ktype = {
> + .sysfs_ops = &dump_sysfs_ops,
> + .release = &dump_release,
> + .default_attrs = dump_default_attrs,
> +};
> +
> +static void free_dump_sg_list(struct opal_sg_list *list)
> +{
> + struct opal_sg_list *sg1;
> + while (list) {
> + sg1 = list->next;
> + kfree(list);
> + list = sg1;
> + }
> + list = NULL;
> +}
> +
> +static struct opal_sg_list *dump_data_to_sglist(struct dump_obj *dump)
> +{
> + struct opal_sg_list *sg1, *list = NULL;
> + void *addr;
> + int64_t size;
> +
> + addr = dump->buffer;
> + size = dump->size;
> +
> + sg1 = kzalloc(PAGE_SIZE, GFP_KERNEL);
> + if (!sg1)
> + goto nomem;
> +
> + list = sg1;
> + sg1->num_entries = 0;
> + while (size > 0) {
> + /* Translate virtual address to physical address */
> + sg1->entry[sg1->num_entries].data =
> + (void *)(vmalloc_to_pfn(addr) << PAGE_SHIFT);
> +
> + if (size > PAGE_SIZE)
> + sg1->entry[sg1->num_entries].length = PAGE_SIZE;
> + else
> + sg1->entry[sg1->num_entries].length = size;
> +
> + sg1->num_entries++;
> + if (sg1->num_entries >= SG_ENTRIES_PER_NODE) {
> + sg1->next = kzalloc(PAGE_SIZE, GFP_KERNEL);
> + if (!sg1->next)
> + goto nomem;
> +
> + sg1 = sg1->next;
> + sg1->num_entries = 0;
> + }
> + addr += PAGE_SIZE;
> + size -= PAGE_SIZE;
> + }
> + return list;
> +
> +nomem:
> + pr_err("%s : Failed to allocate memory\n", __func__);
> + free_dump_sg_list(list);
> + return NULL;
> +}
> +
> +static void sglist_to_phy_addr(struct opal_sg_list *list)
> +{
> + struct opal_sg_list *sg, *next;
> +
> + for (sg = list; sg; sg = next) {
> + next = sg->next;
> + /* Don't translate NULL pointer for last entry */
> + if (sg->next)
> + sg->next = (struct opal_sg_list *)__pa(sg->next);
> + else
> + sg->next = NULL;
> +
> + /* Convert num_entries to length */
> + sg->num_entries =
> + sg->num_entries * sizeof(struct opal_sg_entry) + 16;
> + }
> +}
> +
> +static int64_t dump_read_info(uint32_t *id, uint32_t *size, uint32_t *type)
> +{
> + int rc;
> + *type = 0xffffffff;
> +
> + rc = opal_dump_info2(id, size, type);
> +
> + if (rc == OPAL_PARAMETER)
> + rc = opal_dump_info(id, size);
> +
> + if (rc)
> + pr_warn("%s: Failed to get dump info (%d)\n",
> + __func__, rc);
> + return rc;
> +}
> +
> +static int64_t dump_read_data(struct dump_obj *dump)
> +{
> + struct opal_sg_list *list;
> + uint64_t addr;
> + int64_t rc;
> +
> + /* Allocate memory */
> + dump->buffer = vzalloc(PAGE_ALIGN(dump->size));
> + if (!dump->buffer) {
> + pr_err("%s : Failed to allocate memory\n", __func__);
> + rc = -ENOMEM;
> + goto out;
> + }
> +
> + /* Generate SG list */
> + list = dump_data_to_sglist(dump);
> + if (!list) {
> + rc = -ENOMEM;
> + goto out;
> + }
> +
> + /* Translate sg list addr to real address */
> + sglist_to_phy_addr(list);
> +
> + /* First entry address */
> + addr = __pa(list);
> +
> + /* Fetch data */
> + rc = OPAL_BUSY_EVENT;
> + while (rc == OPAL_BUSY || rc == OPAL_BUSY_EVENT) {
> + rc = opal_dump_read(dump->id, addr);
> + if (rc == OPAL_BUSY_EVENT) {
> + opal_poll_events(NULL);
> + msleep(20);
> + }
> + }
> +
> + if (rc != OPAL_SUCCESS && rc != OPAL_PARTIAL)
> + pr_warn("%s: Extract dump failed for ID 0x%x\n",
> + __func__, dump->id);
> +
> + /* Free SG list */
> + free_dump_sg_list(list);
> +
> +out:
> + return rc;
> +}
> +
> +static ssize_t dump_attr_read(struct file *filep, struct kobject *kobj,
> + struct bin_attribute *bin_attr,
> + char *buffer, loff_t pos, size_t count)
> +{
> + ssize_t rc;
> +
> + struct dump_obj *dump = to_dump_obj(kobj);
> +
> + if (!dump->buffer) {
> + rc = dump_read_data(dump);
> +
> + if (rc != OPAL_SUCCESS && rc != OPAL_PARTIAL) {
> + vfree(dump->buffer);
> + dump->buffer = NULL;
> +
> + return -EIO;
> + }
> + if (rc == OPAL_PARTIAL) {
> + /* On a partial read, we just return EIO
> + * and rely on userspace to ask us to try
> + * again.
> + */
> + pr_info("%s: Platform dump partially read.ID = 0x%x\n",
s/read.ID/read. ID/
Rest looks good.
-Vasant
> + __func__, dump->id);
> + return -EIO;
> + }
> + }
> +
> + memcpy(buffer, dump->buffer + pos, count);
> +
> + /* You may think we could free the dump buffer now and retrieve
> + * it again later if needed, but due to current firmware limitation,
> + * that's not the case. So, once read into userspace once,
> + * we keep the dump around until it's acknowledged by userspace.
> + */
> +
> + return count;
> +}
> +
> +static struct dump_obj *create_dump_obj(uint32_t id, size_t size,
> + uint32_t type)
> +{
> + struct dump_obj *dump;
> + int rc;
> +
> + dump = kzalloc(sizeof(*dump), GFP_KERNEL);
> + if (!dump)
> + return NULL;
> +
> + dump->kobj.kset = dump_kset;
> +
> + kobject_init(&dump->kobj, &dump_ktype);
> +
> + sysfs_bin_attr_init(&dump->dump_attr);
> +
> + dump->dump_attr.attr.name = "dump";
> + dump->dump_attr.attr.mode = 0400;
> + dump->dump_attr.size = size;
> + dump->dump_attr.read = dump_attr_read;
> +
> + dump->id = id;
> + dump->size = size;
> + dump->type = type;
> +
> + rc = kobject_add(&dump->kobj, NULL, "0x%x-0x%x", type, id);
> + if (rc) {
> + kobject_put(&dump->kobj);
> + return NULL;
> + }
> +
> + rc = sysfs_create_bin_file(&dump->kobj, &dump->dump_attr);
> + if (rc) {
> + kobject_put(&dump->kobj);
> + return NULL;
> + }
> +
> + pr_info("%s: New platform dump. ID = 0x%x Size %u\n",
> + __func__, dump->id, dump->size);
> +
> + kobject_uevent(&dump->kobj, KOBJ_ADD);
> +
> + return dump;
> +}
> +
> +static int process_dump(void)
> +{
> + int rc;
> + uint32_t dump_id, dump_size, dump_type;
> + struct dump_obj *dump;
> + char name[22];
> +
> + rc = dump_read_info(&dump_id, &dump_size, &dump_type);
> + if (rc != OPAL_SUCCESS)
> + return rc;
> +
> + sprintf(name, "0x%x-0x%x", dump_type, dump_id);
> +
> + /* we may get notified twice, let's handle
> + * that gracefully and not create two conflicting
> + * entries.
> + */
> + if (kset_find_obj(dump_kset, name))
> + return 0;
> +
> + dump = create_dump_obj(dump_id, dump_size, dump_type);
> + if (!dump)
> + return -1;
> +
> + return 0;
> +}
> +
> +static void dump_work_fn(struct work_struct *work)
> +{
> + process_dump();
> +}
> +
> +static DECLARE_WORK(dump_work, dump_work_fn);
> +
> +static void schedule_process_dump(void)
> +{
> + schedule_work(&dump_work);
> +}
> +
> +/*
> + * New dump available notification
> + *
> + * Once we get notification, we add sysfs entries for it.
> + * We only fetch the dump on demand, and create sysfs asynchronously.
> + */
> +static int dump_event(struct notifier_block *nb,
> + unsigned long events, void *change)
> +{
> + if (events & OPAL_EVENT_DUMP_AVAIL)
> + schedule_process_dump();
> +
> + return 0;
> +}
> +
> +static struct notifier_block dump_nb = {
> + .notifier_call = dump_event,
> + .next = NULL,
> + .priority = 0
> +};
> +
> +void __init opal_platform_dump_init(void)
> +{
> + int rc;
> +
> + dump_kset = kset_create_and_add("dump", NULL, opal_kobj);
> + if (!dump_kset) {
> + pr_warn("%s: Failed to create dump kset\n", __func__);
> + return;
> + }
> +
> + rc = sysfs_create_group(&dump_kset->kobj, &initiate_attr_group);
> + if (rc) {
> + pr_warn("%s: Failed to create initiate dump attr group\n",
> + __func__);
> + kobject_put(&dump_kset->kobj);
> + return;
> + }
> +
> + rc = opal_notifier_register(&dump_nb);
> + if (rc) {
> + pr_warn("%s: Can't register OPAL event notifier (%d)\n",
> + __func__, rc);
> + return;
> + }
> +
> + opal_dump_resend_notification();
> +}
> diff --git a/arch/powerpc/platforms/powernv/opal-wrappers.S b/arch/powerpc/platforms/powernv/opal-wrappers.S
> index 3e8829c..3e02783 100644
> --- a/arch/powerpc/platforms/powernv/opal-wrappers.S
> +++ b/arch/powerpc/platforms/powernv/opal-wrappers.S
> @@ -126,6 +126,12 @@ OPAL_CALL(opal_return_cpu, OPAL_RETURN_CPU);
> OPAL_CALL(opal_validate_flash, OPAL_FLASH_VALIDATE);
> OPAL_CALL(opal_manage_flash, OPAL_FLASH_MANAGE);
> OPAL_CALL(opal_update_flash, OPAL_FLASH_UPDATE);
> +OPAL_CALL(opal_dump_init, OPAL_DUMP_INIT);
> +OPAL_CALL(opal_dump_info, OPAL_DUMP_INFO);
> +OPAL_CALL(opal_dump_info2, OPAL_DUMP_INFO2);
> +OPAL_CALL(opal_dump_read, OPAL_DUMP_READ);
> +OPAL_CALL(opal_dump_ack, OPAL_DUMP_ACK);
> OPAL_CALL(opal_get_msg, OPAL_GET_MSG);
> OPAL_CALL(opal_check_completion, OPAL_CHECK_ASYNC_COMPLETION);
> +OPAL_CALL(opal_dump_resend_notification, OPAL_DUMP_RESEND);
> OPAL_CALL(opal_sync_host_reboot, OPAL_SYNC_HOST_REBOOT);
> diff --git a/arch/powerpc/platforms/powernv/opal.c b/arch/powerpc/platforms/powernv/opal.c
> index 65499ad..262cd1a 100644
> --- a/arch/powerpc/platforms/powernv/opal.c
> +++ b/arch/powerpc/platforms/powernv/opal.c
> @@ -474,6 +474,8 @@ static int __init opal_init(void)
> if (rc == 0) {
> /* Setup code update interface */
> opal_flash_init();
> + /* Setup platform dump extract interface */
> + opal_platform_dump_init();
> }
>
> return 0;
>
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