// SPDX-License-Identifier: GPL-2.0
/*
* ipl/reipl/dump support for Linux on s390.
*
* Copyright IBM Corp. 2005, 2012
* Author(s): Michael Holzheu <[email protected]>
* Volker Sameske <[email protected]>
*/
#include <linux/types.h>
#include <linux/export.h>
#include <linux/init.h>
#include <linux/device.h>
#include <linux/delay.h>
#include <linux/kstrtox.h>
#include <linux/panic_notifier.h>
#include <linux/reboot.h>
#include <linux/ctype.h>
#include <linux/fs.h>
#include <linux/gfp.h>
#include <linux/crash_dump.h>
#include <linux/debug_locks.h>
#include <linux/vmalloc.h>
#include <asm/asm-extable.h>
#include <asm/diag.h>
#include <asm/ipl.h>
#include <asm/smp.h>
#include <asm/setup.h>
#include <asm/cpcmd.h>
#include <asm/ebcdic.h>
#include <asm/sclp.h>
#include <asm/checksum.h>
#include <asm/debug.h>
#include <asm/abs_lowcore.h>
#include <asm/os_info.h>
#include <asm/sections.h>
#include <asm/boot_data.h>
#include "entry.h"
#define IPL_PARM_BLOCK_VERSION 0
#define IPL_UNKNOWN_STR "unknown"
#define IPL_CCW_STR "ccw"
#define IPL_ECKD_STR "eckd"
#define IPL_ECKD_DUMP_STR "eckd_dump"
#define IPL_FCP_STR "fcp"
#define IPL_FCP_DUMP_STR "fcp_dump"
#define IPL_NVME_STR "nvme"
#define IPL_NVME_DUMP_STR "nvme_dump"
#define IPL_NSS_STR "nss"
#define DUMP_CCW_STR "ccw"
#define DUMP_ECKD_STR "eckd"
#define DUMP_FCP_STR "fcp"
#define DUMP_NVME_STR "nvme"
#define DUMP_NONE_STR "none"
/*
* Four shutdown trigger types are supported:
* - panic
* - halt
* - power off
* - reipl
* - restart
*/
#define ON_PANIC_STR "on_panic"
#define ON_HALT_STR "on_halt"
#define ON_POFF_STR "on_poff"
#define ON_REIPL_STR "on_reboot"
#define ON_RESTART_STR "on_restart"
struct shutdown_action;
struct shutdown_trigger {
char *name;
struct shutdown_action *action;
};
/*
* The following shutdown action types are supported:
*/
#define SHUTDOWN_ACTION_IPL_STR "ipl"
#define SHUTDOWN_ACTION_REIPL_STR "reipl"
#define SHUTDOWN_ACTION_DUMP_STR "dump"
#define SHUTDOWN_ACTION_VMCMD_STR "vmcmd"
#define SHUTDOWN_ACTION_STOP_STR "stop"
#define SHUTDOWN_ACTION_DUMP_REIPL_STR "dump_reipl"
struct shutdown_action {
char *name;
void (*fn) (struct shutdown_trigger *trigger);
int (*init) (void);
int init_rc;
};
static char *ipl_type_str(enum ipl_type type)
{
switch (type) {
case IPL_TYPE_CCW:
return IPL_CCW_STR;
case IPL_TYPE_ECKD:
return IPL_ECKD_STR;
case IPL_TYPE_ECKD_DUMP:
return IPL_ECKD_DUMP_STR;
case IPL_TYPE_FCP:
return IPL_FCP_STR;
case IPL_TYPE_FCP_DUMP:
return IPL_FCP_DUMP_STR;
case IPL_TYPE_NSS:
return IPL_NSS_STR;
case IPL_TYPE_NVME:
return IPL_NVME_STR;
case IPL_TYPE_NVME_DUMP:
return IPL_NVME_DUMP_STR;
case IPL_TYPE_UNKNOWN:
default:
return IPL_UNKNOWN_STR;
}
}
enum dump_type {
DUMP_TYPE_NONE = 1,
DUMP_TYPE_CCW = 2,
DUMP_TYPE_FCP = 4,
DUMP_TYPE_NVME = 8,
DUMP_TYPE_ECKD = 16,
};
static char *dump_type_str(enum dump_type type)
{
switch (type) {
case DUMP_TYPE_NONE:
return DUMP_NONE_STR;
case DUMP_TYPE_CCW:
return DUMP_CCW_STR;
case DUMP_TYPE_ECKD:
return DUMP_ECKD_STR;
case DUMP_TYPE_FCP:
return DUMP_FCP_STR;
case DUMP_TYPE_NVME:
return DUMP_NVME_STR;
default:
return NULL;
}
}
int __bootdata_preserved(ipl_block_valid);
struct ipl_parameter_block __bootdata_preserved(ipl_block);
int __bootdata_preserved(ipl_secure_flag);
unsigned long __bootdata_preserved(ipl_cert_list_addr);
unsigned long __bootdata_preserved(ipl_cert_list_size);
unsigned long __bootdata(early_ipl_comp_list_addr);
unsigned long __bootdata(early_ipl_comp_list_size);
static int reipl_capabilities = IPL_TYPE_UNKNOWN;
static enum ipl_type reipl_type = IPL_TYPE_UNKNOWN;
static struct ipl_parameter_block *reipl_block_fcp;
static struct ipl_parameter_block *reipl_block_nvme;
static struct ipl_parameter_block *reipl_block_ccw;
static struct ipl_parameter_block *reipl_block_eckd;
static struct ipl_parameter_block *reipl_block_nss;
static struct ipl_parameter_block *reipl_block_actual;
static int dump_capabilities = DUMP_TYPE_NONE;
static enum dump_type dump_type = DUMP_TYPE_NONE;
static struct ipl_parameter_block *dump_block_fcp;
static struct ipl_parameter_block *dump_block_nvme;
static struct ipl_parameter_block *dump_block_ccw;
static struct ipl_parameter_block *dump_block_eckd;
static struct sclp_ipl_info sclp_ipl_info;
static bool reipl_nvme_clear;
static bool reipl_fcp_clear;
static bool reipl_ccw_clear;
static bool reipl_eckd_clear;
static unsigned long os_info_flags;
static inline int __diag308(unsigned long subcode, unsigned long addr)
{
union register_pair r1;
r1.even = addr;
r1.odd = 0;
asm volatile(
" diag %[r1],%[subcode],0x308\n"
"0: nopr %%r7\n"
EX_TABLE(0b,0b)
: [r1] "+&d" (r1.pair)
: [subcode] "d" (subcode)
: "cc", "memory");
return r1.odd;
}
int diag308(unsigned long subcode, void *addr)
{
diag_stat_inc(DIAG_STAT_X308);
return __diag308(subcode, addr ? virt_to_phys(addr) : 0);
}
EXPORT_SYMBOL_GPL(diag308);
/* SYSFS */
#define IPL_ATTR_SHOW_FN(_prefix, _name, _format, args...) \
static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj, \
struct kobj_attribute *attr, \
char *page) \
{ \
return scnprintf(page, PAGE_SIZE, _format, ##args); \
}
#define IPL_ATTR_CCW_STORE_FN(_prefix, _name, _ipl_blk) \
static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj, \
struct kobj_attribute *attr, \
const char *buf, size_t len) \
{ \
unsigned long long ssid, devno; \
\
if (sscanf(buf, "0.%llx.%llx\n", &ssid, &devno) != 2) \
return -EINVAL; \
\
if (ssid > __MAX_SSID || devno > __MAX_SUBCHANNEL) \
return -EINVAL; \
\
_ipl_blk.ssid = ssid; \
_ipl_blk.devno = devno; \
return len; \
}
#define DEFINE_IPL_CCW_ATTR_RW(_prefix, _name, _ipl_blk) \
IPL_ATTR_SHOW_FN(_prefix, _name, "0.%x.%04x\n", \
_ipl_blk.ssid, _ipl_blk.devno); \
IPL_ATTR_CCW_STORE_FN(_prefix, _name, _ipl_blk); \
static struct kobj_attribute sys_##_prefix##_##_name##_attr = \
__ATTR(_name, 0644, \
sys_##_prefix##_##_name##_show, \
sys_##_prefix##_##_name##_store) \
#define DEFINE_IPL_ATTR_RO(_prefix, _name, _format, _value) \
IPL_ATTR_SHOW_FN(_prefix, _name, _format, _value) \
static struct kobj_attribute sys_##_prefix##_##_name##_attr = \
__ATTR(_name, 0444, sys_##_prefix##_##_name##_show, NULL)
#define DEFINE_IPL_ATTR_RW(_prefix, _name, _fmt_out, _fmt_in, _value) \
IPL_ATTR_SHOW_FN(_prefix, _name, _fmt_out, (unsigned long long) _value) \
static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj, \
struct kobj_attribute *attr, \
const char *buf, size_t len) \
{ \
unsigned long long value; \
if (sscanf(buf, _fmt_in, &value) != 1) \
return -EINVAL; \
_value = value; \
return len; \
} \
static struct kobj_attribute sys_##_prefix##_##_name##_attr = \
__ATTR(_name, 0644, \
sys_##_prefix##_##_name##_show, \
sys_##_prefix##_##_name##_store)
#define DEFINE_IPL_ATTR_STR_RW(_prefix, _name, _fmt_out, _fmt_in, _value)\
IPL_ATTR_SHOW_FN(_prefix, _name, _fmt_out, _value) \
static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj, \
struct kobj_attribute *attr, \
const char *buf, size_t len) \
{ \
if (len >= sizeof(_value)) \
return -E2BIG; \
len = strscpy(_value, buf, sizeof(_value)); \
if (len < 0) \
return len; \
strim(_value); \
return len; \
} \
static struct kobj_attribute sys_##_prefix##_##_name##_attr = \
__ATTR(_name, 0644, \
sys_##_prefix##_##_name##_show, \
sys_##_prefix##_##_name##_store)
#define IPL_ATTR_SCP_DATA_SHOW_FN(_prefix, _ipl_block) \
static ssize_t sys_##_prefix##_scp_data_show(struct file *filp, \
struct kobject *kobj, \
struct bin_attribute *attr, \
char *buf, loff_t off, \
size_t count) \
{ \
size_t size = _ipl_block.scp_data_len; \
void *scp_data = _ipl_block.scp_data; \
\
return memory_read_from_buffer(buf, count, &off, \
scp_data, size); \
}
#define IPL_ATTR_SCP_DATA_STORE_FN(_prefix, _ipl_block_hdr, _ipl_block, _ipl_bp_len, _ipl_bp0_len)\
static ssize_t sys_##_prefix##_scp_data_store(struct file *filp, \
struct kobject *kobj, \
struct bin_attribute *attr, \
char *buf, loff_t off, \
size_t count) \
{ \
size_t scpdata_len = count; \
size_t padding; \
\
if (off) \
return -EINVAL; \
\
memcpy(_ipl_block.scp_data, buf, count); \
if (scpdata_len % 8) { \
padding = 8 - (scpdata_len % 8); \
memset(_ipl_block.scp_data + scpdata_len, \
0, padding); \
scpdata_len += padding; \
} \
\
_ipl_block_hdr.len = _ipl_bp_len + scpdata_len; \
_ipl_block.len = _ipl_bp0_len + scpdata_len; \
_ipl_block.scp_data_len = scpdata_len; \
\
return count; \
}
#define DEFINE_IPL_ATTR_SCP_DATA_RO(_prefix, _ipl_block, _size) \
IPL_ATTR_SCP_DATA_SHOW_FN(_prefix, _ipl_block) \
static struct bin_attribute sys_##_prefix##_scp_data_attr = \
__BIN_ATTR(scp_data, 0444, sys_##_prefix##_scp_data_show, \
NULL, _size)
#define DEFINE_IPL_ATTR_SCP_DATA_RW(_prefix, _ipl_block_hdr, _ipl_block, _ipl_bp_len, _ipl_bp0_len, _size)\
IPL_ATTR_SCP_DATA_SHOW_FN(_prefix, _ipl_block) \
IPL_ATTR_SCP_DATA_STORE_FN(_prefix, _ipl_block_hdr, _ipl_block, _ipl_bp_len, _ipl_bp0_len)\
static struct bin_attribute sys_##_prefix##_scp_data_attr = \
__BIN_ATTR(scp_data, 0644, sys_##_prefix##_scp_data_show, \
sys_##_prefix##_scp_data_store, _size)
/*
* ipl section
*/
static __init enum ipl_type get_ipl_type(void)
{
if (!ipl_block_valid)
return IPL_TYPE_UNKNOWN;
switch (ipl_block.pb0_hdr.pbt) {
case IPL_PBT_CCW:
return IPL_TYPE_CCW;
case IPL_PBT_FCP:
if (ipl_block.fcp.opt == IPL_PB0_FCP_OPT_DUMP)
return IPL_TYPE_FCP_DUMP;
else
return IPL_TYPE_FCP;
case IPL_PBT_NVME:
if (ipl_block.nvme.opt == IPL_PB0_NVME_OPT_DUMP)
return IPL_TYPE_NVME_DUMP;
else
return IPL_TYPE_NVME;
case IPL_PBT_ECKD:
if (ipl_block.eckd.opt == IPL_PB0_ECKD_OPT_DUMP)
return IPL_TYPE_ECKD_DUMP;
else
return IPL_TYPE_ECKD;
}
return IPL_TYPE_UNKNOWN;
}
struct ipl_info ipl_info;
EXPORT_SYMBOL_GPL(ipl_info);
static ssize_t ipl_type_show(struct kobject *kobj, struct kobj_attribute *attr,
char *page)
{
return sprintf(page, "%s\n", ipl_type_str(ipl_info.type));
}
static struct kobj_attribute sys_ipl_type_attr = __ATTR_RO(ipl_type);
static ssize_t ipl_secure_show(struct kobject *kobj,
struct kobj_attribute *attr, char *page)
{
return sprintf(page, "%i\n", !!ipl_secure_flag);
}
static struct kobj_attribute sys_ipl_secure_attr =
__ATTR(secure, 0444, ipl_secure_show, NULL);
static ssize_t ipl_has_secure_show(struct kobject *kobj,
struct kobj_attribute *attr, char *page)
{
return sprintf(page, "%i\n", !!sclp.has_sipl);
}
static struct kobj_attribute sys_ipl_has_secure_attr =
__ATTR(has_secure, 0444, ipl_has_secure_show, NULL);
static ssize_t ipl_vm_parm_show(struct kobject *kobj,
struct kobj_attribute *attr, char *page)
{
char parm[DIAG308_VMPARM_SIZE + 1] = {};
if (ipl_block_valid && (ipl_block.pb0_hdr.pbt == IPL_PBT_CCW))
ipl_block_get_ascii_vmparm(parm, sizeof(parm), &ipl_block);
return sprintf(page, "%s\n", parm);
}
static struct kobj_attribute sys_ipl_vm_parm_attr =
__ATTR(parm, 0444, ipl_vm_parm_show, NULL);
static ssize_t sys_ipl_device_show(struct kobject *kobj,
struct kobj_attribute *attr, char *page)
{
switch (ipl_info.type) {
case IPL_TYPE_CCW:
return sprintf(page, "0.%x.%04x\n", ipl_block.ccw.ssid,
ipl_block.ccw.devno);
case IPL_TYPE_ECKD:
case IPL_TYPE_ECKD_DUMP:
return sprintf(page, "0.%x.%04x\n", ipl_block.eckd.ssid,
ipl_block.eckd.devno);
case IPL_TYPE_FCP:
case IPL_TYPE_FCP_DUMP:
return sprintf(page, "0.0.%04x\n", ipl_block.fcp.devno);
case IPL_TYPE_NVME:
case IPL_TYPE_NVME_DUMP:
return sprintf(page, "%08ux\n", ipl_block.nvme.fid);
default:
return 0;
}
}
static struct kobj_attribute sys_ipl_device_attr =
__ATTR(device, 0444, sys_ipl_device_show, NULL);
static ssize_t sys_ipl_parameter_read(struct file *filp, struct kobject *kobj,
struct bin_attribute *attr, char *buf,
loff_t off, size_t count)
{
return memory_read_from_buffer(buf, count, &off, &ipl_block,
ipl_block.hdr.len);
}
static struct bin_attribute sys_ipl_parameter_attr =
__BIN_ATTR(binary_parameter, 0444, sys_ipl_parameter_read, NULL,
PAGE_SIZE);
DEFINE_IPL_ATTR_SCP_DATA_RO(ipl_fcp, ipl_block.fcp, PAGE_SIZE);
static struct bin_attribute *ipl_fcp_bin_attrs[] = {
&sys_ipl_parameter_attr,
&sys_ipl_fcp_scp_data_attr,
NULL,
};
DEFINE_IPL_ATTR_SCP_DATA_RO(ipl_nvme, ipl_block.nvme, PAGE_SIZE);
static struct bin_attribute *ipl_nvme_bin_attrs[] = {
&sys_ipl_parameter_attr,
&sys_ipl_nvme_scp_data_attr,
NULL,
};
DEFINE_IPL_ATTR_SCP_DATA_RO(ipl_eckd, ipl_block.eckd, PAGE_SIZE);
static struct bin_attribute *ipl_eckd_bin_attrs[] = {
&sys_ipl_parameter_attr,
&sys_ipl_eckd_scp_data_attr,
NULL,
};
/* FCP ipl device attributes */
DEFINE_IPL_ATTR_RO(ipl_fcp, wwpn, "0x%016llx\n",
(unsigned long long)ipl_block.fcp.wwpn);
DEFINE_IPL_ATTR_RO(ipl_fcp, lun, "0x%016llx\n",
(unsigned long long)ipl_block.fcp.lun);
DEFINE_IPL_ATTR_RO(ipl_fcp, bootprog, "%lld\n",
(unsigned long long)ipl_block.fcp.bootprog);
DEFINE_IPL_ATTR_RO(ipl_fcp, br_lba, "%lld\n",
(unsigned long long)ipl_block.fcp.br_lba);
/* NVMe ipl device attributes */
DEFINE_IPL_ATTR_RO(ipl_nvme, fid, "0x%08llx\n",
(unsigned long long)ipl_block.nvme.fid);
DEFINE_IPL_ATTR_RO(ipl_nvme, nsid, "0x%08llx\n",
(unsigned long long)ipl_block.nvme.nsid);
DEFINE_IPL_ATTR_RO(ipl_nvme, bootprog, "%lld\n",
(unsigned long long)ipl_block.nvme.bootprog);
DEFINE_IPL_ATTR_RO(ipl_nvme, br_lba, "%lld\n",
(unsigned long long)ipl_block.nvme.br_lba);
/* ECKD ipl device attributes */
DEFINE_IPL_ATTR_RO(ipl_eckd, bootprog, "%lld\n",
(unsigned long long)ipl_block.eckd.bootprog);
#define IPL_ATTR_BR_CHR_SHOW_FN(_name, _ipb) \
static ssize_t eckd_##_name##_br_chr_show(struct kobject *kobj, \
struct kobj_attribute *attr, \
char *buf) \
{ \
struct ipl_pb0_eckd *ipb = &(_ipb); \
\
if (!ipb->br_chr.cyl && \
!ipb->br_chr.head && \
!ipb->br_chr.record) \
return sprintf(buf, "auto\n"); \
\
return sprintf(buf, "0x%x,0x%x,0x%x\n", \
ipb->br_chr.cyl, \
ipb->br_chr.head, \
ipb->br_chr.record); \
}
#define IPL_ATTR_BR_CHR_STORE_FN(_name, _ipb) \
static ssize_t eckd_##_name##_br_chr_store(struct kobject *kobj, \
struct kobj_attribute *attr, \
const char *buf, size_t len) \
{ \
struct ipl_pb0_eckd *ipb = &(_ipb); \
unsigned long args[3] = { 0 }; \
char *p, *p1, *tmp = NULL; \
int i, rc; \
\
if (!strncmp(buf, "auto", 4)) \
goto out; \
\
tmp = kstrdup(buf, GFP_KERNEL); \
p = tmp; \
for (i = 0; i < 3; i++) { \
p1 = strsep(&p, ", "); \
if (!p1) { \
rc = -EINVAL; \
goto err; \
} \
rc = kstrtoul(p1, 0, args + i); \
if (rc) \
goto err; \
} \
\
rc = -EINVAL; \
if (i != 3) \
goto err; \
\
if ((args[0] || args[1]) && !args[2]) \
goto err; \
\
if (args[0] > UINT_MAX || args[1] > 255 || args[2] > 255) \
goto err; \
\
out: \
ipb->br_chr.cyl = args[0]; \
ipb->br_chr.head = args[1]; \
ipb->br_chr.record = args[2]; \
rc = len; \
err: \
kfree(tmp); \
return rc; \
}
IPL_ATTR_BR_CHR_SHOW_FN(ipl, ipl_block.eckd);
static struct kobj_attribute sys_ipl_eckd_br_chr_attr =
__ATTR(br_chr, 0644, eckd_ipl_br_chr_show, NULL);
IPL_ATTR_BR_CHR_SHOW_FN(reipl, reipl_block_eckd->eckd);
IPL_ATTR_BR_CHR_STORE_FN(reipl, reipl_block_eckd->eckd);
static struct kobj_attribute sys_reipl_eckd_br_chr_attr =
__ATTR(br_chr, 0644, eckd_reipl_br_chr_show, eckd_reipl_br_chr_store);
static ssize_t ipl_ccw_loadparm_show(struct kobject *kobj,
struct kobj_attribute *attr, char *page)
{
char loadparm[LOADPARM_LEN + 1] = {};
if (!sclp_ipl_info.is_valid)
return sprintf(page, "#unknown#\n");
memcpy(loadparm, &sclp_ipl_info.loadparm, LOADPARM_LEN);
EBCASC(loadparm, LOADPARM_LEN);
strim(loadparm);
return sprintf(page, "%s\n", loadparm);
}
static struct kobj_attribute sys_ipl_ccw_loadparm_attr =
__ATTR(loadparm, 0444, ipl_ccw_loadparm_show, NULL);
static struct attribute *ipl_fcp_attrs[] = {
&sys_ipl_device_attr.attr,
&sys_ipl_fcp_wwpn_attr.attr,
&sys_ipl_fcp_lun_attr.attr,
&sys_ipl_fcp_bootprog_attr.attr,
&sys_ipl_fcp_br_lba_attr.attr,
&sys_ipl_ccw_loadparm_attr.attr,
NULL,
};
static struct attribute_group ipl_fcp_attr_group = {
.attrs = ipl_fcp_attrs,
.bin_attrs = ipl_fcp_bin_attrs,
};
static struct attribute *ipl_nvme_attrs[] = {
&sys_ipl_nvme_fid_attr.attr,
&sys_ipl_nvme_nsid_attr.attr,
&sys_ipl_nvme_bootprog_attr.attr,
&sys_ipl_nvme_br_lba_attr.attr,
&sys_ipl_ccw_loadparm_attr.attr,
NULL,
};
static struct attribute_group ipl_nvme_attr_group = {
.attrs = ipl_nvme_attrs,
.bin_attrs = ipl_nvme_bin_attrs,
};
static struct attribute *ipl_eckd_attrs[] = {
&sys_ipl_eckd_bootprog_attr.attr,
&sys_ipl_eckd_br_chr_attr.attr,
&sys_ipl_ccw_loadparm_attr.attr,
&sys_ipl_device_attr.attr,
NULL,
};
static struct attribute_group ipl_eckd_attr_group = {
.attrs = ipl_eckd_attrs,
.bin_attrs = ipl_eckd_bin_attrs,
};
/* CCW ipl device attributes */
static struct attribute *ipl_ccw_attrs_vm[] = {
&sys_ipl_device_attr.attr,
&sys_ipl_ccw_loadparm_attr.attr,
&sys_ipl_vm_parm_attr.attr,
NULL,
};
static struct attribute *ipl_ccw_attrs_lpar[] = {
&sys_ipl_device_attr.attr,
&sys_ipl_ccw_loadparm_attr.attr,
NULL,
};
static struct attribute_group ipl_ccw_attr_group_vm = {
.attrs = ipl_ccw_attrs_vm,
};
static struct attribute_group ipl_ccw_attr_group_lpar = {
.attrs = ipl_ccw_attrs_lpar
};
static struct attribute *ipl_common_attrs[] = {
&sys_ipl_type_attr.attr,
&sys_ipl_secure_attr.attr,
&sys_ipl_has_secure_attr.attr,
NULL,
};
static struct attribute_group ipl_common_attr_group = {
.attrs = ipl_common_attrs,
};
static struct kset *ipl_kset;
static void __ipl_run(void *unused)
{
diag308(DIAG308_LOAD_CLEAR, NULL);
}
static void ipl_run(struct shutdown_trigger *trigger)
{
smp_call_ipl_cpu(__ipl_run, NULL);
}
static int __init ipl_init(void)
{
int rc;
ipl_kset = kset_create_and_add("ipl", NULL, firmware_kobj);
if (!ipl_kset) {
rc = -ENOMEM;
goto out;
}
rc = sysfs_create_group(&ipl_kset->kobj, &ipl_common_attr_group);
if (rc)
goto out;
switch (ipl_info.type) {
case IPL_TYPE_CCW:
if (MACHINE_IS_VM)
rc = sysfs_create_group(&ipl_kset->kobj,
&ipl_ccw_attr_group_vm);
else
rc = sysfs_create_group(&ipl_kset->kobj,
&ipl_ccw_attr_group_lpar);
break;
case IPL_TYPE_ECKD:
case IPL_TYPE_ECKD_DUMP:
rc = sysfs_create_group(&ipl_kset->kobj, &ipl_eckd_attr_group);
break;
case IPL_TYPE_FCP:
case IPL_TYPE_FCP_DUMP:
rc = sysfs_create_group(&ipl_kset->kobj, &ipl_fcp_attr_group);
break;
case IPL_TYPE_NVME:
case IPL_TYPE_NVME_DUMP:
rc = sysfs_create_group(&ipl_kset->kobj, &ipl_nvme_attr_group);
break;
default:
break;
}
out:
if (rc)
panic("ipl_init failed: rc = %i\n", rc);
return 0;
}
static struct shutdown_action __refdata ipl_action = {
.name = SHUTDOWN_ACTION_IPL_STR,
.fn = ipl_run,
.init = ipl_init,
};
/*
* reipl shutdown action: Reboot Linux on shutdown.
*/
/* VM IPL PARM attributes */
static ssize_t reipl_generic_vmparm_show(struct ipl_parameter_block *ipb,
char *page)
{
char vmparm[DIAG308_VMPARM_SIZE + 1] = {};
ipl_block_get_ascii_vmparm(vmparm, sizeof(vmparm), ipb);
return sprintf(page, "%s\n", vmparm);
}
static ssize_t reipl_generic_vmparm_store(struct ipl_parameter_block *ipb,
size_t vmparm_max,
const char *buf, size_t len)
{
int i, ip_len;
/* ignore trailing newline */
ip_len = len;
if ((len > 0) && (buf[len - 1] == '\n'))
ip_len--;
if (ip_len > vmparm_max)
return -EINVAL;
/* parm is used to store kernel options, check for common chars */
for (i = 0; i < ip_len; i++)
if (!(isalnum(buf[i]) || isascii(buf[i]) || isprint(buf[i])))
return -EINVAL;
memset(ipb->ccw.vm_parm, 0, DIAG308_VMPARM_SIZE);
ipb->ccw.vm_parm_len = ip_len;
if (ip_len > 0) {
ipb->ccw.vm_flags |= IPL_PB0_CCW_VM_FLAG_VP;
memcpy(ipb->ccw.vm_parm, buf, ip_len);
ASCEBC(ipb->ccw.vm_parm, ip_len);
} else {
ipb->ccw.vm_flags &= ~IPL_PB0_CCW_VM_FLAG_VP;
}
return len;
}
/* NSS wrapper */
static ssize_t reipl_nss_vmparm_show(struct kobject *kobj,
struct kobj_attribute *attr, char *page)
{
return reipl_generic_vmparm_show(reipl_block_nss, page);
}
static ssize_t reipl_nss_vmparm_store(struct kobject *kobj,
struct kobj_attribute *attr,
const char *buf, size_t len)
{
return reipl_generic_vmparm_store(reipl_block_nss, 56, buf, len);
}
/* CCW wrapper */
static ssize_t reipl_ccw_vmparm_show(struct kobject *kobj,
struct kobj_attribute *attr, char *page)
{
return reipl_generic_vmparm_show(reipl_block_ccw, page);
}
static ssize_t reipl_ccw_vmparm_store(struct kobject *kobj,
struct kobj_attribute *attr,
const char *buf, size_t len)
{
return reipl_generic_vmparm_store(reipl_block_ccw, 64, buf, len);
}
static struct kobj_attribute sys_reipl_nss_vmparm_attr =
__ATTR(parm, 0644, reipl_nss_vmparm_show,
reipl_nss_vmparm_store);
static struct kobj_attribute sys_reipl_ccw_vmparm_attr =
__ATTR(parm, 0644, reipl_ccw_vmparm_show,
reipl_ccw_vmparm_store);
/* FCP reipl device attributes */
DEFINE_IPL_ATTR_SCP_DATA_RW(reipl_fcp, reipl_block_fcp->hdr,
reipl_block_fcp->fcp,
IPL_BP_FCP_LEN, IPL_BP0_FCP_LEN,
DIAG308_SCPDATA_SIZE);
static struct bin_attribute *reipl_fcp_bin_attrs[] = {
&sys_reipl_fcp_scp_data_attr,
NULL,
};
DEFINE_IPL_ATTR_RW(reipl_fcp, wwpn, "0x%016llx\n", "%llx\n",
reipl_block_fcp->fcp.wwpn);
DEFINE_IPL_ATTR_RW(reipl_fcp, lun, "0x%016llx\n", "%llx\n",
reipl_block_fcp->fcp.lun);
DEFINE_IPL_ATTR_RW(reipl_fcp, bootprog, "%lld\n", "%lld\n",
reipl_block_fcp->fcp.bootprog);
DEFINE_IPL_ATTR_RW(reipl_fcp, br_lba, "%lld\n", "%lld\n",
reipl_block_fcp->fcp.br_lba);
DEFINE_IPL_ATTR_RW(reipl_fcp, device, "0.0.%04llx\n", "0.0.%llx\n",
reipl_block_fcp->fcp.devno);
static void reipl_get_ascii_loadparm(char *loadparm,
struct ipl_parameter_block *ibp)
{
memcpy(loadparm, ibp->common.loadparm, LOADPARM_LEN);
EBCASC(loadparm, LOADPARM_LEN);
loadparm[LOADPARM_LEN] = 0;
strim(loadparm);
}
static ssize_t reipl_generic_loadparm_show(struct ipl_parameter_block *ipb,
char *page)
{
char buf[LOADPARM_LEN + 1];
reipl_get_ascii_loadparm(buf, ipb);
return sprintf(page, "%s\n", buf);
}
static ssize_t reipl_generic_loadparm_store(struct ipl_parameter_block *ipb,
const char *buf, size_t len)
{
int i, lp_len;
/* ignore trailing newline */
lp_len = len;
if ((len > 0) && (buf[len - 1] == '\n'))
lp_len--;
/* loadparm can have max 8 characters and must not start with a blank */
if ((lp_len > LOADPARM_LEN) || ((lp_len > 0) && (buf[0] == ' ')))
return -EINVAL;
/* loadparm can only contain "a-z,A-Z,0-9,SP,." */
for (i = 0; i < lp_len; i++) {
if (isalpha(buf[i]) || isdigit(buf[i]) || (buf[i] == ' ') ||
(buf[i] == '.'))
continue;
return -EINVAL;
}
/* initialize loadparm with blanks */
memset(ipb->common.loadparm, ' ', LOADPARM_LEN);
/* copy and convert to ebcdic */
memcpy(ipb->common.loadparm, buf, lp_len);
ASCEBC(ipb->common.loadparm, LOADPARM_LEN);
ipb->common.flags |= IPL_PB0_FLAG_LOADPARM;
return len;
}
#define DEFINE_GENERIC_LOADPARM(name) \
static ssize_t reipl_##name##_loadparm_show(struct kobject *kobj, \
struct kobj_attribute *attr, char *page) \
{ \
return reipl_generic_loadparm_show(reipl_block_##name, page); \
} \
static ssize_t reipl_##name##_loadparm_store(struct kobject *kobj, \
struct kobj_attribute *attr, \
const char *buf, size_t len) \
{ \
return reipl_generic_loadparm_store(reipl_block_##name, buf, len); \
} \
static struct kobj_attribute sys_reipl_##name##_loadparm_attr = \
__ATTR(loadparm, 0644, reipl_##name##_loadparm_show, \
reipl_##name##_loadparm_store)
DEFINE_GENERIC_LOADPARM(fcp);
DEFINE_GENERIC_LOADPARM(nvme);
DEFINE_GENERIC_LOADPARM(ccw);
DEFINE_GENERIC_LOADPARM(nss);
DEFINE_GENERIC_LOADPARM(eckd);
static ssize_t reipl_fcp_clear_show(struct kobject *kobj,
struct kobj_attribute *attr, char *page)
{
return sprintf(page, "%u\n", reipl_fcp_clear);
}
static ssize_t reipl_fcp_clear_store(struct kobject *kobj,
struct kobj_attribute *attr,
const char *buf, size_t len)
{
if (kstrtobool(buf, &reipl_fcp_clear) < 0)
return -EINVAL;
return len;
}
static struct attribute *reipl_fcp_attrs[] = {
&sys_reipl_fcp_device_attr.attr,
&sys_reipl_fcp_wwpn_attr.attr,
&sys_reipl_fcp_lun_attr.attr,
&sys_reipl_fcp_bootprog_attr.attr,
&sys_reipl_fcp_br_lba_attr.attr,
&sys_reipl_fcp_loadparm_attr.attr,
NULL,
};
static struct attribute_group reipl_fcp_attr_group = {
.attrs = reipl_fcp_attrs,
.bin_attrs = reipl_fcp_bin_attrs,
};
static struct kobj_attribute sys_reipl_fcp_clear_attr =
__ATTR(clear, 0644, reipl_fcp_clear_show, reipl_fcp_clear_store);
/* NVME reipl device attributes */
DEFINE_IPL_ATTR_SCP_DATA_RW(reipl_nvme, reipl_block_nvme->hdr,
reipl_block_nvme->nvme,
IPL_BP_NVME_LEN, IPL_BP0_NVME_LEN,
DIAG308_SCPDATA_SIZE);
static struct bin_attribute *reipl_nvme_bin_attrs[] = {
&sys_reipl_nvme_scp_data_attr,
NULL,
};
DEFINE_IPL_ATTR_RW(reipl_nvme, fid, "0x%08llx\n", "%llx\n",
reipl_block_nvme->nvme.fid);
DEFINE_IPL_ATTR_RW(reipl_nvme, nsid, "0x%08llx\n", "%llx\n",
reipl_block_nvme->nvme.nsid);
DEFINE_IPL_ATTR_RW(reipl_nvme, bootprog, "%lld\n", "%lld\n",
reipl_block_nvme->nvme.bootprog);
DEFINE_IPL_ATTR_RW(reipl_nvme, br_lba, "%lld\n", "%lld\n",
reipl_block_nvme->nvme.br_lba);
static struct attribute *reipl_nvme_attrs[] = {
&sys_reipl_nvme_fid_attr.attr,
&sys_reipl_nvme_nsid_attr.attr,
&sys_reipl_nvme_bootprog_attr.attr,
&sys_reipl_nvme_br_lba_attr.attr,
&sys_reipl_nvme_loadparm_attr.attr,
NULL,
};
static struct attribute_group reipl_nvme_attr_group = {
.attrs = reipl_nvme_attrs,
.bin_attrs = reipl_nvme_bin_attrs
};
static ssize_t reipl_nvme_clear_show(struct kobject *kobj,
struct kobj_attribute *attr, char *page)
{
return sprintf(page, "%u\n", reipl_nvme_clear);
}
static ssize_t reipl_nvme_clear_store(struct kobject *kobj,
struct kobj_attribute *attr,
const char *buf, size_t len)
{
if (kstrtobool(buf, &reipl_nvme_clear) < 0)
return -EINVAL;
return len;
}
static struct kobj_attribute sys_reipl_nvme_clear_attr =
__ATTR(clear, 0644, reipl_nvme_clear_show, reipl_nvme_clear_store);
/* CCW reipl device attributes */
DEFINE_IPL_CCW_ATTR_RW(reipl_ccw, device, reipl_block_ccw->ccw);
static ssize_t reipl_ccw_clear_show(struct kobject *kobj,
struct kobj_attribute *attr, char *page)
{
return sprintf(page, "%u\n", reipl_ccw_clear);
}
static ssize_t reipl_ccw_clear_store(struct kobject *kobj,
struct kobj_attribute *attr,
const char *buf, size_t len)
{
if (kstrtobool(buf, &reipl_ccw_clear) < 0)
return -EINVAL;
return len;
}
static struct kobj_attribute sys_reipl_ccw_clear_attr =
__ATTR(clear, 0644, reipl_ccw_clear_show, reipl_ccw_clear_store);
static struct attribute *reipl_ccw_attrs_vm[] = {
&sys_reipl_ccw_device_attr.attr,
&sys_reipl_ccw_loadparm_attr.attr,
&sys_reipl_ccw_vmparm_attr.attr,
&sys_reipl_ccw_clear_attr.attr,
NULL,
};
static struct attribute *reipl_ccw_attrs_lpar[] = {
&sys_reipl_ccw_device_attr.attr,
&sys_reipl_ccw_loadparm_attr.attr,
&sys_reipl_ccw_clear_attr.attr,
NULL,
};
static struct attribute_group reipl_ccw_attr_group_vm = {
.name = IPL_CCW_STR,
.attrs = reipl_ccw_attrs_vm,
};
static struct attribute_group reipl_ccw_attr_group_lpar = {
.name = IPL_CCW_STR,
.attrs = reipl_ccw_attrs_lpar,
};
/* ECKD reipl device attributes */
DEFINE_IPL_ATTR_SCP_DATA_RW(reipl_eckd, reipl_block_eckd->hdr,
reipl_block_eckd->eckd,
IPL_BP_ECKD_LEN, IPL_BP0_ECKD_LEN,
DIAG308_SCPDATA_SIZE);
static struct bin_attribute *reipl_eckd_bin_attrs[] = {
&sys_reipl_eckd_scp_data_attr,
NULL,
};
DEFINE_IPL_CCW_ATTR_RW(reipl_eckd, device, reipl_block_eckd->eckd);
DEFINE_IPL_ATTR_RW(reipl_eckd, bootprog, "%lld\n", "%lld\n",
reipl_block_eckd->eckd.bootprog);
static struct attribute *reipl_eckd_attrs[] = {
&sys_reipl_eckd_device_attr.attr,
&sys_reipl_eckd_bootprog_attr.attr,
&sys_reipl_eckd_br_chr_attr.attr,
&sys_reipl_eckd_loadparm_attr.attr,
NULL,
};
static struct attribute_group reipl_eckd_attr_group = {
.attrs = reipl_eckd_attrs,
.bin_attrs = reipl_eckd_bin_attrs
};
static ssize_t reipl_eckd_clear_show(struct kobject *kobj,
struct kobj_attribute *attr, char *page)
{
return sprintf(page, "%u\n", reipl_eckd_clear);
}
static ssize_t reipl_eckd_clear_store(struct kobject *kobj,
struct kobj_attribute *attr,
const char *buf, size_t len)
{
if (kstrtobool(buf, &reipl_eckd_clear) < 0)
return -EINVAL;
return len;
}
static struct kobj_attribute sys_reipl_eckd_clear_attr =
__ATTR(clear, 0644, reipl_eckd_clear_show, reipl_eckd_clear_store);
/* NSS reipl device attributes */
static void reipl_get_ascii_nss_name(char *dst,
struct ipl_parameter_block *ipb)
{
memcpy(dst, ipb->ccw.nss_name, NSS_NAME_SIZE);
EBCASC(dst, NSS_NAME_SIZE);
dst[NSS_NAME_SIZE] = 0;
}
static ssize_t reipl_nss_name_show(struct kobject *kobj,
struct kobj_attribute *attr, char *page)
{
char nss_name[NSS_NAME_SIZE + 1] = {};
reipl_get_ascii_nss_name(nss_name, reipl_block_nss);
return sprintf(page, "%s\n", nss_name);
}
static ssize_t reipl_nss_name_store(struct kobject *kobj,
struct kobj_attribute *attr,
const char *buf, size_t len)
{
int nss_len;
/* ignore trailing newline */
nss_len = len;
if ((len > 0) && (buf[len - 1] == '\n'))
nss_len--;
if (nss_len > NSS_NAME_SIZE)
return -EINVAL;
memset(reipl_block_nss->ccw.nss_name, 0x40, NSS_NAME_SIZE);
if (nss_len > 0) {
reipl_block_nss->ccw.vm_flags |= IPL_PB0_CCW_VM_FLAG_NSS;
memcpy(reipl_block_nss->ccw.nss_name, buf, nss_len);
ASCEBC(reipl_block_nss->ccw.nss_name, nss_len);
EBC_TOUPPER(reipl_block_nss->ccw.nss_name, nss_len);
} else {
reipl_block_nss->ccw.vm_flags &= ~IPL_PB0_CCW_VM_FLAG_NSS;
}
return len;
}
static struct kobj_attribute sys_reipl_nss_name_attr =
__ATTR(name, 0644, reipl_nss_name_show,
reipl_nss_name_store);
static struct attribute *reipl_nss_attrs[] = {
&sys_reipl_nss_name_attr.attr,
&sys_reipl_nss_loadparm_attr.attr,
&sys_reipl_nss_vmparm_attr.attr,
NULL,
};
static struct attribute_group reipl_nss_attr_group = {
.name = IPL_NSS_STR,
.attrs = reipl_nss_attrs,
};
void set_os_info_reipl_block(void)
{
os_info_entry_add_data(OS_INFO_REIPL_BLOCK, reipl_block_actual,
reipl_block_actual->hdr.len);
}
/* reipl type */
static int reipl_set_type(enum ipl_type type)
{
if (!(reipl_capabilities & type))
return -EINVAL;
switch(type) {
case IPL_TYPE_CCW:
reipl_block_actual = reipl_block_ccw;
break;
case IPL_TYPE_ECKD:
reipl_block_actual = reipl_block_eckd;
break;
case IPL_TYPE_FCP:
reipl_block_actual = reipl_block_fcp;
break;
case IPL_TYPE_NVME:
reipl_block_actual = reipl_block_nvme;
break;
case IPL_TYPE_NSS:
reipl_block_actual = reipl_block_nss;
break;
default:
break;
}
reipl_type = type;
return 0;
}
static ssize_t reipl_type_show(struct kobject *kobj,
struct kobj_attribute *attr, char *page)
{
return sprintf(page, "%s\n", ipl_type_str(reipl_type));
}
static ssize_t reipl_type_store(struct kobject *kobj,
struct kobj_attribute *attr,
const char *buf, size_t len)
{
int rc = -EINVAL;
if (strncmp(buf, IPL_CCW_STR, strlen(IPL_CCW_STR)) == 0)
rc = reipl_set_type(IPL_TYPE_CCW);
else if (strncmp(buf, IPL_ECKD_STR, strlen(IPL_ECKD_STR)) == 0)
rc = reipl_set_type(IPL_TYPE_ECKD);
else if (strncmp(buf, IPL_FCP_STR, strlen(IPL_FCP_STR)) == 0)
rc = reipl_set_type(IPL_TYPE_FCP);
else if (strncmp(buf, IPL_NVME_STR, strlen(IPL_NVME_STR)) == 0)
rc = reipl_set_type(IPL_TYPE_NVME);
else if (strncmp(buf, IPL_NSS_STR, strlen(IPL_NSS_STR)) == 0)
rc = reipl_set_type(IPL_TYPE_NSS);
return (rc != 0) ? rc : len;
}
static struct kobj_attribute reipl_type_attr =
__ATTR(reipl_type, 0644, reipl_type_show, reipl_type_store);
static struct kset *reipl_kset;
static struct kset *reipl_fcp_kset;
static struct kset *reipl_nvme_kset;
static struct kset *reipl_eckd_kset;
static void __reipl_run(void *unused)
{
switch (reipl_type) {
case IPL_TYPE_CCW:
diag308(DIAG308_SET, reipl_block_ccw);
if (reipl_ccw_clear)
diag308(DIAG308_LOAD_CLEAR, NULL);
else
diag308(DIAG308_LOAD_NORMAL_DUMP, NULL);
break;
case IPL_TYPE_ECKD:
diag308(DIAG308_SET, reipl_block_eckd);
if (reipl_eckd_clear)
diag308(DIAG308_LOAD_CLEAR, NULL);
else
diag308(DIAG308_LOAD_NORMAL, NULL);
break;
case IPL_TYPE_FCP:
diag308(DIAG308_SET, reipl_block_fcp);
if (reipl_fcp_clear)
diag308(DIAG308_LOAD_CLEAR, NULL);
else
diag308(DIAG308_LOAD_NORMAL, NULL);
break;
case IPL_TYPE_NVME:
diag308(DIAG308_SET, reipl_block_nvme);
if (reipl_nvme_clear)
diag308(DIAG308_LOAD_CLEAR, NULL);
else
diag308(DIAG308_LOAD_NORMAL, NULL);
break;
case IPL_TYPE_NSS:
diag308(DIAG308_SET, reipl_block_nss);
diag308(DIAG308_LOAD_CLEAR, NULL);
break;
case IPL_TYPE_UNKNOWN:
diag308(DIAG308_LOAD_CLEAR, NULL);
break;
case IPL_TYPE_FCP_DUMP:
case IPL_TYPE_NVME_DUMP:
case IPL_TYPE_ECKD_DUMP:
break;
}
disabled_wait();
}
static void reipl_run(struct shutdown_trigger *trigger)
{
smp_call_ipl_cpu(__reipl_run, NULL);
}
static void reipl_block_ccw_init(struct ipl_parameter_block *ipb)
{
ipb->hdr.len = IPL_BP_CCW_LEN;
ipb->hdr.version = IPL_PARM_BLOCK_VERSION;
ipb->pb0_hdr.len = IPL_BP0_CCW_LEN;
ipb->pb0_hdr.pbt = IPL_PBT_CCW;
}
static void reipl_block_ccw_fill_parms(struct ipl_parameter_block *ipb)
{
/* LOADPARM */
/* check if read scp info worked and set loadparm */
if (sclp_ipl_info.is_valid)
memcpy(ipb->ccw.loadparm, &sclp_ipl_info.loadparm, LOADPARM_LEN);
else
/* read scp info failed: set empty loadparm (EBCDIC blanks) */
memset(ipb->ccw.loadparm, 0x40, LOADPARM_LEN);
ipb->ccw.flags = IPL_PB0_FLAG_LOADPARM;
/* VM PARM */
if (MACHINE_IS_VM && ipl_block_valid &&
(ipl_block.ccw.vm_flags & IPL_PB0_CCW_VM_FLAG_VP)) {
ipb->ccw.vm_flags |= IPL_PB0_CCW_VM_FLAG_VP;
ipb->ccw.vm_parm_len = ipl_block.ccw.vm_parm_len;
memcpy(ipb->ccw.vm_parm,
ipl_block.ccw.vm_parm, DIAG308_VMPARM_SIZE);
}
}
static int __init reipl_nss_init(void)
{
int rc;
if (!MACHINE_IS_VM)
return 0;
reipl_block_nss = (void *) get_zeroed_page(GFP_KERNEL);
if (!reipl_block_nss)
return -ENOMEM;
rc = sysfs_create_group(&reipl_kset->kobj, &reipl_nss_attr_group);
if (rc)
return rc;
reipl_block_ccw_init(reipl_block_nss);
reipl_capabilities |= IPL_TYPE_NSS;
return 0;
}
static int __init reipl_ccw_init(void)
{
int rc;
reipl_block_ccw = (void *) get_zeroed_page(GFP_KERNEL);
if (!reipl_block_ccw)
return -ENOMEM;
rc = sysfs_create_group(&reipl_kset->kobj,
MACHINE_IS_VM ? &reipl_ccw_attr_group_vm
: &reipl_ccw_attr_group_lpar);
if (rc)
return rc;
reipl_block_ccw_init(reipl_block_ccw);
if (ipl_info.type == IPL_TYPE_CCW) {
reipl_block_ccw->ccw.ssid = ipl_block.ccw.ssid;
reipl_block_ccw->ccw.devno = ipl_block.ccw.devno;
reipl_block_ccw_fill_parms(reipl_block_ccw);
}
reipl_capabilities |= IPL_TYPE_CCW;
return 0;
}
static int __init reipl_fcp_init(void)
{
int rc;
reipl_block_fcp = (void *) get_zeroed_page(GFP_KERNEL);
if (!reipl_block_fcp)
return -ENOMEM;
/* sysfs: create fcp kset for mixing attr group and bin attrs */
reipl_fcp_kset = kset_create_and_add(IPL_FCP_STR, NULL,
&reipl_kset->kobj);
if (!reipl_fcp_kset) {
free_page((unsigned long) reipl_block_fcp);
return -ENOMEM;
}
rc = sysfs_create_group(&reipl_fcp_kset->kobj, &reipl_fcp_attr_group);
if (rc)
goto out1;
if (test_facility(141)) {
rc = sysfs_create_file(&reipl_fcp_kset->kobj,
&sys_reipl_fcp_clear_attr.attr);
if (rc)
goto out2;
} else {
reipl_fcp_clear = true;
}
if (ipl_info.type == IPL_TYPE_FCP) {
memcpy(reipl_block_fcp, &ipl_block, sizeof(ipl_block));
/*
* Fix loadparm: There are systems where the (SCSI) LOADPARM
* is invalid in the SCSI IPL parameter block, so take it
* always from sclp_ipl_info.
*/
memcpy(reipl_block_fcp->fcp.loadparm, sclp_ipl_info.loadparm,
LOADPARM_LEN);
} else {
reipl_block_fcp->hdr.len = IPL_BP_FCP_LEN;
reipl_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION;
reipl_block_fcp->fcp.len = IPL_BP0_FCP_LEN;
reipl_block_fcp->fcp.pbt = IPL_PBT_FCP;
reipl_block_fcp->fcp.opt = IPL_PB0_FCP_OPT_IPL;
}
reipl_capabilities |= IPL_TYPE_FCP;
return 0;
out2:
sysfs_remove_group(&reipl_fcp_kset->kobj, &reipl_fcp_attr_group);
out1:
kset_unregister(reipl_fcp_kset);
free_page((unsigned long) reipl_block_fcp);
return rc;
}
static int __init reipl_nvme_init(void)
{
int rc;
reipl_block_nvme = (void *) get_zeroed_page(GFP_KERNEL);
if (!reipl_block_nvme)
return -ENOMEM;
/* sysfs: create kset for mixing attr group and bin attrs */
reipl_nvme_kset = kset_create_and_add(IPL_NVME_STR, NULL,
&reipl_kset->kobj);
if (!reipl_nvme_kset) {
free_page((unsigned long) reipl_block_nvme);
return -ENOMEM;
}
rc = sysfs_create_group(&reipl_nvme_kset->kobj, &reipl_nvme_attr_group);
if (rc)
goto out1;
if (test_facility(141)) {
rc = sysfs_create_file(&reipl_nvme_kset->kobj,
&sys_reipl_nvme_clear_attr.attr);
if (rc)
goto out2;
} else {
reipl_nvme_clear = true;
}
if (ipl_info.type == IPL_TYPE_NVME) {
memcpy(reipl_block_nvme, &ipl_block, sizeof(ipl_block));
/*
* Fix loadparm: There are systems where the (SCSI) LOADPARM
* is invalid in the IPL parameter block, so take it
* always from sclp_ipl_info.
*/
memcpy(reipl_block_nvme->nvme.loadparm, sclp_ipl_info.loadparm,
LOADPARM_LEN);
} else {
reipl_block_nvme->hdr.len = IPL_BP_NVME_LEN;
reipl_block_nvme->hdr.version = IPL_PARM_BLOCK_VERSION;
reipl_block_nvme->nvme.len = IPL_BP0_NVME_LEN;
reipl_block_nvme->nvme.pbt = IPL_PBT_NVME;
reipl_block_nvme->nvme.opt = IPL_PB0_NVME_OPT_IPL;
}
reipl_capabilities |= IPL_TYPE_NVME;
return 0;
out2:
sysfs_remove_group(&reipl_nvme_kset->kobj, &reipl_nvme_attr_group);
out1:
kset_unregister(reipl_nvme_kset);
free_page((unsigned long) reipl_block_nvme);
return rc;
}
static int __init reipl_eckd_init(void)
{
int rc;
if (!sclp.has_sipl_eckd)
return 0;
reipl_block_eckd = (void *)get_zeroed_page(GFP_KERNEL);
if (!reipl_block_eckd)
return -ENOMEM;
/* sysfs: create kset for mixing attr group and bin attrs */
reipl_eckd_kset = kset_create_and_add(IPL_ECKD_STR, NULL,
&reipl_kset->kobj);
if (!reipl_eckd_kset) {
free_page((unsigned long)reipl_block_eckd);
return -ENOMEM;
}
rc = sysfs_create_group(&reipl_eckd_kset->kobj, &reipl_eckd_attr_group);
if (rc)
goto out1;
if (test_facility(141)) {
rc = sysfs_create_file(&reipl_eckd_kset->kobj,
&sys_reipl_eckd_clear_attr.attr);
if (rc)
goto out2;
} else {
reipl_eckd_clear = true;
}
if (ipl_info.type == IPL_TYPE_ECKD) {
memcpy(reipl_block_eckd, &ipl_block, sizeof(ipl_block));
} else {
reipl_block_eckd->hdr.len = IPL_BP_ECKD_LEN;
reipl_block_eckd->hdr.version = IPL_PARM_BLOCK_VERSION;
reipl_block_eckd->eckd.len = IPL_BP0_ECKD_LEN;
reipl_block_eckd->eckd.pbt = IPL_PBT_ECKD;
reipl_block_eckd->eckd.opt = IPL_PB0_ECKD_OPT_IPL;
}
reipl_capabilities |= IPL_TYPE_ECKD;
return 0;
out2:
sysfs_remove_group(&reipl_eckd_kset->kobj, &reipl_eckd_attr_group);
out1:
kset_unregister(reipl_eckd_kset);
free_page((unsigned long)reipl_block_eckd);
return rc;
}
static int __init reipl_type_init(void)
{
enum ipl_type reipl_type = ipl_info.type;
struct ipl_parameter_block *reipl_block;
unsigned long size;
reipl_block = os_info_old_entry(OS_INFO_REIPL_BLOCK, &size);
if (!reipl_block)
goto out;
/*
* If we have an OS info reipl block, this will be used
*/
if (reipl_block->pb0_hdr.pbt == IPL_PBT_FCP) {
memcpy(reipl_block_fcp, reipl_block, size);
reipl_type = IPL_TYPE_FCP;
} else if (reipl_block->pb0_hdr.pbt == IPL_PBT_NVME) {
memcpy(reipl_block_nvme, reipl_block, size);
reipl_type = IPL_TYPE_NVME;
} else if (reipl_block->pb0_hdr.pbt == IPL_PBT_CCW) {
memcpy(reipl_block_ccw, reipl_block, size);
reipl_type = IPL_TYPE_CCW;
} else if (reipl_block->pb0_hdr.pbt == IPL_PBT_ECKD) {
memcpy(reipl_block_eckd, reipl_block, size);
reipl_type = IPL_TYPE_ECKD;
}
out:
return reipl_set_type(reipl_type);
}
static int __init reipl_init(void)
{
int rc;
reipl_kset = kset_create_and_add("reipl", NULL, firmware_kobj);
if (!reipl_kset)
return -ENOMEM;
rc = sysfs_create_file(&reipl_kset->kobj, &reipl_type_attr.attr);
if (rc) {
kset_unregister(reipl_kset);
return rc;
}
rc = reipl_ccw_init();
if (rc)
return rc;
rc = reipl_eckd_init();
if (rc)
return rc;
rc = reipl_fcp_init();
if (rc)
return rc;
rc = reipl_nvme_init();
if (rc)
return rc;
rc = reipl_nss_init();
if (rc)
return rc;
return reipl_type_init();
}
static struct shutdown_action __refdata reipl_action = {
.name = SHUTDOWN_ACTION_REIPL_STR,
.fn = reipl_run,
.init = reipl_init,
};
/*
* dump shutdown action: Dump Linux on shutdown.
*/
/* FCP dump device attributes */
DEFINE_IPL_ATTR_RW(dump_fcp, wwpn, "0x%016llx\n", "%llx\n",
dump_block_fcp->fcp.wwpn);
DEFINE_IPL_ATTR_RW(dump_fcp, lun, "0x%016llx\n", "%llx\n",
dump_block_fcp->fcp.lun);
DEFINE_IPL_ATTR_RW(dump_fcp, bootprog, "%lld\n", "%lld\n",
dump_block_fcp->fcp.bootprog);
DEFINE_IPL_ATTR_RW(dump_fcp, br_lba, "%lld\n", "%lld\n",
dump_block_fcp->fcp.br_lba);
DEFINE_IPL_ATTR_RW(dump_fcp, device, "0.0.%04llx\n", "0.0.%llx\n",
dump_block_fcp->fcp.devno);
DEFINE_IPL_ATTR_SCP_DATA_RW(dump_fcp, dump_block_fcp->hdr,
dump_block_fcp->fcp,
IPL_BP_FCP_LEN, IPL_BP0_FCP_LEN,
DIAG308_SCPDATA_SIZE);
static struct attribute *dump_fcp_attrs[] = {
&sys_dump_fcp_device_attr.attr,
&sys_dump_fcp_wwpn_attr.attr,
&sys_dump_fcp_lun_attr.attr,
&sys_dump_fcp_bootprog_attr.attr,
&sys_dump_fcp_br_lba_attr.attr,
NULL,
};
static struct bin_attribute *dump_fcp_bin_attrs[] = {
&sys_dump_fcp_scp_data_attr,
NULL,
};
static struct attribute_group dump_fcp_attr_group = {
.name = IPL_FCP_STR,
.attrs = dump_fcp_attrs,
.bin_attrs = dump_fcp_bin_attrs,
};
/* NVME dump device attributes */
DEFINE_IPL_ATTR_RW(dump_nvme, fid, "0x%08llx\n", "%llx\n",
dump_block_nvme->nvme.fid);
DEFINE_IPL_ATTR_RW(dump_nvme, nsid, "0x%08llx\n", "%llx\n",
dump_block_nvme->nvme.nsid);
DEFINE_IPL_ATTR_RW(dump_nvme, bootprog, "%lld\n", "%llx\n",
dump_block_nvme->nvme.bootprog);
DEFINE_IPL_ATTR_RW(dump_nvme, br_lba, "%lld\n", "%llx\n",
dump_block_nvme->nvme.br_lba);
DEFINE_IPL_ATTR_SCP_DATA_RW(dump_nvme, dump_block_nvme->hdr,
dump_block_nvme->nvme,
IPL_BP_NVME_LEN, IPL_BP0_NVME_LEN,
DIAG308_SCPDATA_SIZE);
static struct attribute *dump_nvme_attrs[] = {
&sys_dump_nvme_fid_attr.attr,
&sys_dump_nvme_nsid_attr.attr,
&sys_dump_nvme_bootprog_attr.attr,
&sys_dump_nvme_br_lba_attr.attr,
NULL,
};
static struct bin_attribute *dump_nvme_bin_attrs[] = {
&sys_dump_nvme_scp_data_attr,
NULL,
};
static struct attribute_group dump_nvme_attr_group = {
.name = IPL_NVME_STR,
.attrs = dump_nvme_attrs,
.bin_attrs = dump_nvme_bin_attrs,
};
/* ECKD dump device attributes */
DEFINE_IPL_CCW_ATTR_RW(dump_eckd, device, dump_block_eckd->eckd);
DEFINE_IPL_ATTR_RW(dump_eckd, bootprog, "%lld\n", "%llx\n",
dump_block_eckd->eckd.bootprog);
IPL_ATTR_BR_CHR_SHOW_FN(dump, dump_block_eckd->eckd);
IPL_ATTR_BR_CHR_STORE_FN(dump, dump_block_eckd->eckd);
static struct kobj_attribute sys_dump_eckd_br_chr_attr =
__ATTR(br_chr, 0644, eckd_dump_br_chr_show, eckd_dump_br_chr_store);
DEFINE_IPL_ATTR_SCP_DATA_RW(dump_eckd, dump_block_eckd->hdr,
dump_block_eckd->eckd,
IPL_BP_ECKD_LEN, IPL_BP0_ECKD_LEN,
DIAG308_SCPDATA_SIZE);
static struct attribute *dump_eckd_attrs[] = {
&sys_dump_eckd_device_attr.attr,
&sys_dump_eckd_bootprog_attr.attr,
&sys_dump_eckd_br_chr_attr.attr,
NULL,
};
static struct bin_attribute *dump_eckd_bin_attrs[] = {
&sys_dump_eckd_scp_data_attr,
NULL,
};
static struct attribute_group dump_eckd_attr_group = {
.name = IPL_ECKD_STR,
.attrs = dump_eckd_attrs,
.bin_attrs = dump_eckd_bin_attrs,
};
/* CCW dump device attributes */
DEFINE_IPL_CCW_ATTR_RW(dump_ccw, device, dump_block_ccw->ccw);
static struct attribute *dump_ccw_attrs[] = {
&sys_dump_ccw_device_attr.attr,
NULL,
};
static struct attribute_group dump_ccw_attr_group = {
.name = IPL_CCW_STR,
.attrs = dump_ccw_attrs,
};
/* dump type */
static int dump_set_type(enum dump_type type)
{
if (!(dump_capabilities & type))
return -EINVAL;
dump_type = type;
return 0;
}
static ssize_t dump_type_show(struct kobject *kobj,
struct kobj_attribute *attr, char *page)
{
return sprintf(page, "%s\n", dump_type_str(dump_type));
}
static ssize_t dump_type_store(struct kobject *kobj,
struct kobj_attribute *attr,
const char *buf, size_t len)
{
int rc = -EINVAL;
if (strncmp(buf, DUMP_NONE_STR, strlen(DUMP_NONE_STR)) == 0)
rc = dump_set_type(DUMP_TYPE_NONE);
else if (strncmp(buf, DUMP_CCW_STR, strlen(DUMP_CCW_STR)) == 0)
rc = dump_set_type(DUMP_TYPE_CCW);
else if (strncmp(buf, DUMP_ECKD_STR, strlen(DUMP_ECKD_STR)) == 0)
rc = dump_set_type(DUMP_TYPE_ECKD);
else if (strncmp(buf, DUMP_FCP_STR, strlen(DUMP_FCP_STR)) == 0)
rc = dump_set_type(DUMP_TYPE_FCP);
else if (strncmp(buf, DUMP_NVME_STR, strlen(DUMP_NVME_STR)) == 0)
rc = dump_set_type(DUMP_TYPE_NVME);
return (rc != 0) ? rc : len;
}
static struct kobj_attribute dump_type_attr =
__ATTR(dump_type, 0644, dump_type_show, dump_type_store);
static struct kset *dump_kset;
static void diag308_dump(void *dump_block)
{
diag308(DIAG308_SET, dump_block);
while (1) {
if (diag308(DIAG308_LOAD_NORMAL_DUMP, NULL) != 0x302)
break;
udelay(USEC_PER_SEC);
}
}
static void __dump_run(void *unused)
{
switch (dump_type) {
case DUMP_TYPE_CCW:
diag308_dump(dump_block_ccw);
break;
case DUMP_TYPE_ECKD:
diag308_dump(dump_block_eckd);
break;
case DUMP_TYPE_FCP:
diag308_dump(dump_block_fcp);
break;
case DUMP_TYPE_NVME:
diag308_dump(dump_block_nvme);
break;
default:
break;
}
}
static void dump_run(struct shutdown_trigger *trigger)
{
if (dump_type == DUMP_TYPE_NONE)
return;
smp_send_stop();
smp_call_ipl_cpu(__dump_run, NULL);
}
static int __init dump_ccw_init(void)
{
int rc;
dump_block_ccw = (void *) get_zeroed_page(GFP_KERNEL);
if (!dump_block_ccw)
return -ENOMEM;
rc = sysfs_create_group(&dump_kset->kobj, &dump_ccw_attr_group);
if (rc) {
free_page((unsigned long)dump_block_ccw);
return rc;
}
dump_block_ccw->hdr.len = IPL_BP_CCW_LEN;
dump_block_ccw->hdr.version = IPL_PARM_BLOCK_VERSION;
dump_block_ccw->ccw.len = IPL_BP0_CCW_LEN;
dump_block_ccw->ccw.pbt = IPL_PBT_CCW;
dump_capabilities |= DUMP_TYPE_CCW;
return 0;
}
static int __init dump_fcp_init(void)
{
int rc;
if (!sclp_ipl_info.has_dump)
return 0; /* LDIPL DUMP is not installed */
dump_block_fcp = (void *) get_zeroed_page(GFP_KERNEL);
if (!dump_block_fcp)
return -ENOMEM;
rc = sysfs_create_group(&dump_kset->kobj, &dump_fcp_attr_group);
if (rc) {
free_page((unsigned long)dump_block_fcp);
return rc;
}
dump_block_fcp->hdr.len = IPL_BP_FCP_LEN;
dump_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION;
dump_block_fcp->fcp.len = IPL_BP0_FCP_LEN;
dump_block_fcp->fcp.pbt = IPL_PBT_FCP;
dump_block_fcp->fcp.opt = IPL_PB0_FCP_OPT_DUMP;
dump_capabilities |= DUMP_TYPE_FCP;
return 0;
}
static int __init dump_nvme_init(void)
{
int rc;
if (!sclp_ipl_info.has_dump)
return 0; /* LDIPL DUMP is not installed */
dump_block_nvme = (void *) get_zeroed_page(GFP_KERNEL);
if (!dump_block_nvme)
return -ENOMEM;
rc = sysfs_create_group(&dump_kset->kobj, &dump_nvme_attr_group);
if (rc) {
free_page((unsigned long)dump_block_nvme);
return rc;
}
dump_block_nvme->hdr.len = IPL_BP_NVME_LEN;
dump_block_nvme->hdr.version = IPL_PARM_BLOCK_VERSION;
dump_block_nvme->nvme.len = IPL_BP0_NVME_LEN;
dump_block_nvme->nvme.pbt = IPL_PBT_NVME;
dump_block_nvme->nvme.opt = IPL_PB0_NVME_OPT_DUMP;
dump_capabilities |= DUMP_TYPE_NVME;
return 0;
}
static int __init dump_eckd_init(void)
{
int rc;
if (!sclp_ipl_info.has_dump || !sclp.has_sipl_eckd)
return 0; /* LDIPL DUMP is not installed */
dump_block_eckd = (void *)get_zeroed_page(GFP_KERNEL);
if (!dump_block_eckd)
return -ENOMEM;
rc = sysfs_create_group(&dump_kset->kobj, &dump_eckd_attr_group);
if (rc) {
free_page((unsigned long)dump_block_eckd);
return rc;
}
dump_block_eckd->hdr.len = IPL_BP_ECKD_LEN;
dump_block_eckd->hdr.version = IPL_PARM_BLOCK_VERSION;
dump_block_eckd->eckd.len = IPL_BP0_ECKD_LEN;
dump_block_eckd->eckd.pbt = IPL_PBT_ECKD;
dump_block_eckd->eckd.opt = IPL_PB0_ECKD_OPT_DUMP;
dump_capabilities |= DUMP_TYPE_ECKD;
return 0;
}
static int __init dump_init(void)
{
int rc;
dump_kset = kset_create_and_add("dump", NULL, firmware_kobj);
if (!dump_kset)
return -ENOMEM;
rc = sysfs_create_file(&dump_kset->kobj, &dump_type_attr.attr);
if (rc) {
kset_unregister(dump_kset);
return rc;
}
rc = dump_ccw_init();
if (rc)
return rc;
rc = dump_eckd_init();
if (rc)
return rc;
rc = dump_fcp_init();
if (rc)
return rc;
rc = dump_nvme_init();
if (rc)
return rc;
dump_set_type(DUMP_TYPE_NONE);
return 0;
}
static struct shutdown_action __refdata dump_action = {
.name = SHUTDOWN_ACTION_DUMP_STR,
.fn = dump_run,
.init = dump_init,
};
static void dump_reipl_run(struct shutdown_trigger *trigger)
{
struct lowcore *abs_lc;
unsigned int csum;
/*
* Set REIPL_CLEAR flag in os_info flags entry indicating
* 'clear' sysfs attribute has been set on the panicked system
* for specified reipl type.
* Always set for IPL_TYPE_NSS and IPL_TYPE_UNKNOWN.
*/
if ((reipl_type == IPL_TYPE_CCW && reipl_ccw_clear) ||
(reipl_type == IPL_TYPE_ECKD && reipl_eckd_clear) ||
(reipl_type == IPL_TYPE_FCP && reipl_fcp_clear) ||
(reipl_type == IPL_TYPE_NVME && reipl_nvme_clear) ||
reipl_type == IPL_TYPE_NSS ||
reipl_type == IPL_TYPE_UNKNOWN)
os_info_flags |= OS_INFO_FLAG_REIPL_CLEAR;
os_info_entry_add_data(OS_INFO_FLAGS_ENTRY, &os_info_flags, sizeof(os_info_flags));
csum = (__force unsigned int)cksm(reipl_block_actual, reipl_block_actual->hdr.len, 0);
abs_lc = get_abs_lowcore();
abs_lc->ipib = __pa(reipl_block_actual);
abs_lc->ipib_checksum = csum;
put_abs_lowcore(abs_lc);
dump_run(trigger);
}
static struct shutdown_action __refdata dump_reipl_action = {
.name = SHUTDOWN_ACTION_DUMP_REIPL_STR,
.fn = dump_reipl_run,
};
/*
* vmcmd shutdown action: Trigger vm command on shutdown.
*/
#define VMCMD_MAX_SIZE 240
static char vmcmd_on_reboot[VMCMD_MAX_SIZE + 1];
static char vmcmd_on_panic[VMCMD_MAX_SIZE + 1];
static char vmcmd_on_halt[VMCMD_MAX_SIZE + 1];
static char vmcmd_on_poff[VMCMD_MAX_SIZE + 1];
static char vmcmd_on_restart[VMCMD_MAX_SIZE + 1];
DEFINE_IPL_ATTR_STR_RW(vmcmd, on_reboot, "%s\n", "%s\n", vmcmd_on_reboot);
DEFINE_IPL_ATTR_STR_RW(vmcmd, on_panic, "%s\n", "%s\n", vmcmd_on_panic);
DEFINE_IPL_ATTR_STR_RW(vmcmd, on_halt, "%s\n", "%s\n", vmcmd_on_halt);
DEFINE_IPL_ATTR_STR_RW(vmcmd, on_poff, "%s\n", "%s\n", vmcmd_on_poff);
DEFINE_IPL_ATTR_STR_RW(vmcmd, on_restart, "%s\n", "%s\n", vmcmd_on_restart);
static struct attribute *vmcmd_attrs[] = {
&sys_vmcmd_on_reboot_attr.attr,
&sys_vmcmd_on_panic_attr.attr,
&sys_vmcmd_on_halt_attr.attr,
&sys_vmcmd_on_poff_attr.attr,
&sys_vmcmd_on_restart_attr.attr,
NULL,
};
static struct attribute_group vmcmd_attr_group = {
.attrs = vmcmd_attrs,
};
static struct kset *vmcmd_kset;
static void vmcmd_run(struct shutdown_trigger *trigger)
{
char *cmd;
if (strcmp(trigger->name, ON_REIPL_STR) == 0)
cmd = vmcmd_on_reboot;
else if (strcmp(trigger->name, ON_PANIC_STR) == 0)
cmd = vmcmd_on_panic;
else if (strcmp(trigger->name, ON_HALT_STR) == 0)
cmd = vmcmd_on_halt;
else if (strcmp(trigger->name, ON_POFF_STR) == 0)
cmd = vmcmd_on_poff;
else if (strcmp(trigger->name, ON_RESTART_STR) == 0)
cmd = vmcmd_on_restart;
else
return;
if (strlen(cmd) == 0)
return;
__cpcmd(cmd, NULL, 0, NULL);
}
static int vmcmd_init(void)
{
if (!MACHINE_IS_VM)
return -EOPNOTSUPP;
vmcmd_kset = kset_create_and_add("vmcmd", NULL, firmware_kobj);
if (!vmcmd_kset)
return -ENOMEM;
return sysfs_create_group(&vmcmd_kset->kobj, &vmcmd_attr_group);
}
static struct shutdown_action vmcmd_action = {SHUTDOWN_ACTION_VMCMD_STR,
vmcmd_run, vmcmd_init};
/*
* stop shutdown action: Stop Linux on shutdown.
*/
static void stop_run(struct shutdown_trigger *trigger)
{
if (strcmp(trigger->name, ON_PANIC_STR) == 0 ||
strcmp(trigger->name, ON_RESTART_STR) == 0)
disabled_wait();
smp_stop_cpu();
}
static struct shutdown_action stop_action = {SHUTDOWN_ACTION_STOP_STR,
stop_run, NULL};
/* action list */
static struct shutdown_action *shutdown_actions_list[] = {
&ipl_action, &reipl_action, &dump_reipl_action, &dump_action,
&vmcmd_action, &stop_action};
#define SHUTDOWN_ACTIONS_COUNT (sizeof(shutdown_actions_list) / sizeof(void *))
/*
* Trigger section
*/
static struct kset *shutdown_actions_kset;
static int set_trigger(const char *buf, struct shutdown_trigger *trigger,
size_t len)
{
int i;
for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) {
if (sysfs_streq(buf, shutdown_actions_list[i]->name)) {
if (shutdown_actions_list[i]->init_rc) {
return shutdown_actions_list[i]->init_rc;
} else {
trigger->action = shutdown_actions_list[i];
return len;
}
}
}
return -EINVAL;
}
/* on reipl */
static struct shutdown_trigger on_reboot_trigger = {ON_REIPL_STR,
&reipl_action};
static ssize_t on_reboot_show(struct kobject *kobj,
struct kobj_attribute *attr, char *page)
{
return sprintf(page, "%s\n", on_reboot_trigger.action->name);
}
static ssize_t on_reboot_store(struct kobject *kobj,
struct kobj_attribute *attr,
const char *buf, size_t len)
{
return set_trigger(buf, &on_reboot_trigger, len);
}
static struct kobj_attribute on_reboot_attr = __ATTR_RW(on_reboot);
static void do_machine_restart(char *__unused)
{
smp_send_stop();
on_reboot_trigger.action->fn(&on_reboot_trigger);
reipl_run(NULL);
}
void (*_machine_restart)(char *command) = do_machine_restart;
/* on panic */
static struct shutdown_trigger on_panic_trigger = {ON_PANIC_STR, &stop_action};
static ssize_t on_panic_show(struct kobject *kobj,
struct kobj_attribute *attr, char *page)
{
return sprintf(page, "%s\n", on_panic_trigger.action->name);
}
static ssize_t on_panic_store(struct kobject *kobj,
struct kobj_attribute *attr,
const char *buf, size_t len)
{
return set_trigger(buf, &on_panic_trigger, len);
}
static struct kobj_attribute on_panic_attr = __ATTR_RW(on_panic);
static void do_panic(void)
{
lgr_info_log();
on_panic_trigger.action->fn(&on_panic_trigger);
stop_run(&on_panic_trigger);
}
/* on restart */
static struct shutdown_trigger on_restart_trigger = {ON_RESTART_STR,
&stop_action};
static ssize_t on_restart_show(struct kobject *kobj,
struct kobj_attribute *attr, char *page)
{
return sprintf(page, "%s\n", on_restart_trigger.action->name);
}
static ssize_t on_restart_store(struct kobject *kobj,
struct kobj_attribute *attr,
const char *buf, size_t len)
{
return set_trigger(buf, &on_restart_trigger, len);
}
static struct kobj_attribute on_restart_attr = __ATTR_RW(on_restart);
static void __do_restart(void *ignore)
{
smp_send_stop();
#ifdef CONFIG_CRASH_DUMP
crash_kexec(NULL);
#endif
on_restart_trigger.action->fn(&on_restart_trigger);
stop_run(&on_restart_trigger);
}
void do_restart(void *arg)
{
tracing_off();
debug_locks_off();
lgr_info_log();
smp_call_ipl_cpu(__do_restart, arg);
}
/* on halt */
static struct shutdown_trigger on_halt_trigger = {ON_HALT_STR, &stop_action};
static ssize_t on_halt_show(struct kobject *kobj,
struct kobj_attribute *attr, char *page)
{
return sprintf(page, "%s\n", on_halt_trigger.action->name);
}
static ssize_t on_halt_store(struct kobject *kobj,
struct kobj_attribute *attr,
const char *buf, size_t len)
{
return set_trigger(buf, &on_halt_trigger, len);
}
static struct kobj_attribute on_halt_attr = __ATTR_RW(on_halt);
static void do_machine_halt(void)
{
smp_send_stop();
on_halt_trigger.action->fn(&on_halt_trigger);
stop_run(&on_halt_trigger);
}
void (*_machine_halt)(void) = do_machine_halt;
/* on power off */
static struct shutdown_trigger on_poff_trigger = {ON_POFF_STR, &stop_action};
static ssize_t on_poff_show(struct kobject *kobj,
struct kobj_attribute *attr, char *page)
{
return sprintf(page, "%s\n", on_poff_trigger.action->name);
}
static ssize_t on_poff_store(struct kobject *kobj,
struct kobj_attribute *attr,
const char *buf, size_t len)
{
return set_trigger(buf, &on_poff_trigger, len);
}
static struct kobj_attribute on_poff_attr = __ATTR_RW(on_poff);
static void do_machine_power_off(void)
{
smp_send_stop();
on_poff_trigger.action->fn(&on_poff_trigger);
stop_run(&on_poff_trigger);
}
void (*_machine_power_off)(void) = do_machine_power_off;
static struct attribute *shutdown_action_attrs[] = {
&on_restart_attr.attr,
&on_reboot_attr.attr,
&on_panic_attr.attr,
&on_halt_attr.attr,
&on_poff_attr.attr,
NULL,
};
static struct attribute_group shutdown_action_attr_group = {
.attrs = shutdown_action_attrs,
};
static void __init shutdown_triggers_init(void)
{
shutdown_actions_kset = kset_create_and_add("shutdown_actions", NULL,
firmware_kobj);
if (!shutdown_actions_kset)
goto fail;
if (sysfs_create_group(&shutdown_actions_kset->kobj,
&shutdown_action_attr_group))
goto fail;
return;
fail:
panic("shutdown_triggers_init failed\n");
}
static void __init shutdown_actions_init(void)
{
int i;
for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) {
if (!shutdown_actions_list[i]->init)
continue;
shutdown_actions_list[i]->init_rc =
shutdown_actions_list[i]->init();
}
}
static int __init s390_ipl_init(void)
{
char str[8] = {0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40};
sclp_early_get_ipl_info(&sclp_ipl_info);
/*
* Fix loadparm: There are systems where the (SCSI) LOADPARM
* returned by read SCP info is invalid (contains EBCDIC blanks)
* when the system has been booted via diag308. In that case we use
* the value from diag308, if available.
*
* There are also systems where diag308 store does not work in
* case the system is booted from HMC. Fortunately in this case
* READ SCP info provides the correct value.
*/
if (memcmp(sclp_ipl_info.loadparm, str, sizeof(str)) == 0 && ipl_block_valid)
memcpy(sclp_ipl_info.loadparm, ipl_block.ccw.loadparm, LOADPARM_LEN);
shutdown_actions_init();
shutdown_triggers_init();
return 0;
}
__initcall(s390_ipl_init);
static void __init strncpy_skip_quote(char *dst, char *src, int n)
{
int sx, dx;
dx = 0;
for (sx = 0; src[sx] != 0; sx++) {
if (src[sx] == '"')
continue;
dst[dx++] = src[sx];
if (dx >= n)
break;
}
}
static int __init vmcmd_on_reboot_setup(char *str)
{
if (!MACHINE_IS_VM)
return 1;
strncpy_skip_quote(vmcmd_on_reboot, str, VMCMD_MAX_SIZE);
vmcmd_on_reboot[VMCMD_MAX_SIZE] = 0;
on_reboot_trigger.action = &vmcmd_action;
return 1;
}
__setup("vmreboot=", vmcmd_on_reboot_setup);
static int __init vmcmd_on_panic_setup(char *str)
{
if (!MACHINE_IS_VM)
return 1;
strncpy_skip_quote(vmcmd_on_panic, str, VMCMD_MAX_SIZE);
vmcmd_on_panic[VMCMD_MAX_SIZE] = 0;
on_panic_trigger.action = &vmcmd_action;
return 1;
}
__setup("vmpanic=", vmcmd_on_panic_setup);
static int __init vmcmd_on_halt_setup(char *str)
{
if (!MACHINE_IS_VM)
return 1;
strncpy_skip_quote(vmcmd_on_halt, str, VMCMD_MAX_SIZE);
vmcmd_on_halt[VMCMD_MAX_SIZE] = 0;
on_halt_trigger.action = &vmcmd_action;
return 1;
}
__setup("vmhalt=", vmcmd_on_halt_setup);
static int __init vmcmd_on_poff_setup(char *str)
{
if (!MACHINE_IS_VM)
return 1;
strncpy_skip_quote(vmcmd_on_poff, str, VMCMD_MAX_SIZE);
vmcmd_on_poff[VMCMD_MAX_SIZE] = 0;
on_poff_trigger.action = &vmcmd_action;
return 1;
}
__setup("vmpoff=", vmcmd_on_poff_setup);
static int on_panic_notify(struct notifier_block *self,
unsigned long event, void *data)
{
do_panic();
return NOTIFY_OK;
}
static struct notifier_block on_panic_nb = {
.notifier_call = on_panic_notify,
.priority = INT_MIN,
};
void __init setup_ipl(void)
{
BUILD_BUG_ON(sizeof(struct ipl_parameter_block) != PAGE_SIZE);
ipl_info.type = get_ipl_type();
switch (ipl_info.type) {
case IPL_TYPE_CCW:
ipl_info.data.ccw.dev_id.ssid = ipl_block.ccw.ssid;
ipl_info.data.ccw.dev_id.devno = ipl_block.ccw.devno;
break;
case IPL_TYPE_ECKD:
case IPL_TYPE_ECKD_DUMP:
ipl_info.data.eckd.dev_id.ssid = ipl_block.eckd.ssid;
ipl_info.data.eckd.dev_id.devno = ipl_block.eckd.devno;
break;
case IPL_TYPE_FCP:
case IPL_TYPE_FCP_DUMP:
ipl_info.data.fcp.dev_id.ssid = 0;
ipl_info.data.fcp.dev_id.devno = ipl_block.fcp.devno;
ipl_info.data.fcp.wwpn = ipl_block.fcp.wwpn;
ipl_info.data.fcp.lun = ipl_block.fcp.lun;
break;
case IPL_TYPE_NVME:
case IPL_TYPE_NVME_DUMP:
ipl_info.data.nvme.fid = ipl_block.nvme.fid;
ipl_info.data.nvme.nsid = ipl_block.nvme.nsid;
break;
case IPL_TYPE_NSS:
case IPL_TYPE_UNKNOWN:
/* We have no info to copy */
break;
}
atomic_notifier_chain_register(&panic_notifier_list, &on_panic_nb);
}
void s390_reset_system(void)
{
/* Disable prefixing */
set_prefix(0);
/* Disable lowcore protection */
local_ctl_clear_bit(0, CR0_LOW_ADDRESS_PROTECTION_BIT);
diag_amode31_ops.diag308_reset();
}
#ifdef CONFIG_KEXEC_FILE
int ipl_report_add_component(struct ipl_report *report, struct kexec_buf *kbuf,
unsigned char flags, unsigned short cert)
{
struct ipl_report_component *comp;
comp = vzalloc(sizeof(*comp));
if (!comp)
return -ENOMEM;
list_add_tail(&comp->list, &report->components);
comp->entry.addr = kbuf->mem;
comp->entry.len = kbuf->memsz;
comp->entry.flags = flags;
comp->entry.certificate_index = cert;
report->size += sizeof(comp->entry);
return 0;
}
int ipl_report_add_certificate(struct ipl_report *report, void *key,
unsigned long addr, unsigned long len)
{
struct ipl_report_certificate *cert;
cert = vzalloc(sizeof(*cert));
if (!cert)
return -ENOMEM;
list_add_tail(&cert->list, &report->certificates);
cert->entry.addr = addr;
cert->entry.len = len;
cert->key = key;
report->size += sizeof(cert->entry);
report->size += cert->entry.len;
return 0;
}
struct ipl_report *ipl_report_init(struct ipl_parameter_block *ipib)
{
struct ipl_report *report;
report = vzalloc(sizeof(*report));
if (!report)
return ERR_PTR(-ENOMEM);
report->ipib = ipib;
INIT_LIST_HEAD(&report->components);
INIT_LIST_HEAD(&report->certificates);
report->size = ALIGN(ipib->hdr.len, 8);
report->size += sizeof(struct ipl_rl_hdr);
report->size += sizeof(struct ipl_rb_components);
report->size += sizeof(struct ipl_rb_certificates);
return report;
}
void *ipl_report_finish(struct ipl_report *report)
{
struct ipl_report_certificate *cert;
struct ipl_report_component *comp;
struct ipl_rb_certificates *certs;
struct ipl_parameter_block *ipib;
struct ipl_rb_components *comps;
struct ipl_rl_hdr *rl_hdr;
void *buf, *ptr;
buf = vzalloc(report->size);
if (!buf)
goto out;
ptr = buf;
memcpy(ptr, report->ipib, report->ipib->hdr.len);
ipib = ptr;
if (ipl_secure_flag)
ipib->hdr.flags |= IPL_PL_FLAG_SIPL;
ipib->hdr.flags |= IPL_PL_FLAG_IPLSR;
ptr += report->ipib->hdr.len;
ptr = PTR_ALIGN(ptr, 8);
rl_hdr = ptr;
ptr += sizeof(*rl_hdr);
comps = ptr;
comps->rbt = IPL_RBT_COMPONENTS;
ptr += sizeof(*comps);
list_for_each_entry(comp, &report->components, list) {
memcpy(ptr, &comp->entry, sizeof(comp->entry));
ptr += sizeof(comp->entry);
}
comps->len = ptr - (void *)comps;
certs = ptr;
certs->rbt = IPL_RBT_CERTIFICATES;
ptr += sizeof(*certs);
list_for_each_entry(cert, &report->certificates, list) {
memcpy(ptr, &cert->entry, sizeof(cert->entry));
ptr += sizeof(cert->entry);
}
certs->len = ptr - (void *)certs;
rl_hdr->len = ptr - (void *)rl_hdr;
list_for_each_entry(cert, &report->certificates, list) {
memcpy(ptr, cert->key, cert->entry.len);
ptr += cert->entry.len;
}
BUG_ON(ptr > buf + report->size);
out:
return buf;
}
int ipl_report_free(struct ipl_report *report)
{
struct ipl_report_component *comp, *ncomp;
struct ipl_report_certificate *cert, *ncert;
list_for_each_entry_safe(comp, ncomp, &report->components, list)
vfree(comp);
list_for_each_entry_safe(cert, ncert, &report->certificates, list)
vfree(cert);
vfree(report);
return 0;
}
#endif
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