linux/arch/s390/kernel/ipl.c
Michael Holzheu 852ffd0f4e s390/kdump: Clear subchannel ID to signal non-CCW/SCSI IPL
For CCW and SCSI IPL the hardware sets the subchannel ID and number
correctly at 0xb8. For kdump at 0xb8 normally there is the data of
the previously IPLed system.

In order to be clean now for kdump and kexec always set the subchannel
ID and number to zero. This tells the next OS that no CCW/SCSI IPL
has been done.

Reviewed-by: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2014-08-12 13:00:06 +02:00

2077 lines
51 KiB
C

/*
* ipl/reipl/dump support for Linux on s390.
*
* Copyright IBM Corp. 2005, 2012
* Author(s): Michael Holzheu <holzheu@de.ibm.com>
* Heiko Carstens <heiko.carstens@de.ibm.com>
* Volker Sameske <sameske@de.ibm.com>
*/
#include <linux/types.h>
#include <linux/module.h>
#include <linux/device.h>
#include <linux/delay.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 <asm/ipl.h>
#include <asm/smp.h>
#include <asm/setup.h>
#include <asm/cpcmd.h>
#include <asm/cio.h>
#include <asm/ebcdic.h>
#include <asm/reset.h>
#include <asm/sclp.h>
#include <asm/checksum.h>
#include <asm/debug.h>
#include <asm/os_info.h>
#include "entry.h"
#define IPL_PARM_BLOCK_VERSION 0
#define IPL_UNKNOWN_STR "unknown"
#define IPL_CCW_STR "ccw"
#define IPL_FCP_STR "fcp"
#define IPL_FCP_DUMP_STR "fcp_dump"
#define IPL_NSS_STR "nss"
#define DUMP_CCW_STR "ccw"
#define DUMP_FCP_STR "fcp"
#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_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_UNKNOWN:
default:
return IPL_UNKNOWN_STR;
}
}
enum dump_type {
DUMP_TYPE_NONE = 1,
DUMP_TYPE_CCW = 2,
DUMP_TYPE_FCP = 4,
};
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_FCP:
return DUMP_FCP_STR;
default:
return NULL;
}
}
/*
* Must be in data section since the bss section
* is not cleared when these are accessed.
*/
static u16 ipl_devno __attribute__((__section__(".data"))) = 0;
u32 ipl_flags __attribute__((__section__(".data"))) = 0;
enum ipl_method {
REIPL_METHOD_CCW_CIO,
REIPL_METHOD_CCW_DIAG,
REIPL_METHOD_CCW_VM,
REIPL_METHOD_FCP_RO_DIAG,
REIPL_METHOD_FCP_RW_DIAG,
REIPL_METHOD_FCP_RO_VM,
REIPL_METHOD_FCP_DUMP,
REIPL_METHOD_NSS,
REIPL_METHOD_NSS_DIAG,
REIPL_METHOD_DEFAULT,
};
enum dump_method {
DUMP_METHOD_NONE,
DUMP_METHOD_CCW_CIO,
DUMP_METHOD_CCW_DIAG,
DUMP_METHOD_CCW_VM,
DUMP_METHOD_FCP_DIAG,
};
static int diag308_set_works = 0;
static struct ipl_parameter_block ipl_block;
static int reipl_capabilities = IPL_TYPE_UNKNOWN;
static enum ipl_type reipl_type = IPL_TYPE_UNKNOWN;
static enum ipl_method reipl_method = REIPL_METHOD_DEFAULT;
static struct ipl_parameter_block *reipl_block_fcp;
static struct ipl_parameter_block *reipl_block_ccw;
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 enum dump_method dump_method = DUMP_METHOD_NONE;
static struct ipl_parameter_block *dump_block_fcp;
static struct ipl_parameter_block *dump_block_ccw;
static struct sclp_ipl_info sclp_ipl_info;
int diag308(unsigned long subcode, void *addr)
{
register unsigned long _addr asm("0") = (unsigned long) addr;
register unsigned long _rc asm("1") = 0;
asm volatile(
" diag %0,%2,0x308\n"
"0:\n"
EX_TABLE(0b,0b)
: "+d" (_addr), "+d" (_rc)
: "d" (subcode) : "cc", "memory");
return _rc;
}
EXPORT_SYMBOL_GPL(diag308);
/* SYSFS */
#define DEFINE_IPL_ATTR_RO(_prefix, _name, _format, _value) \
static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj, \
struct kobj_attribute *attr, \
char *page) \
{ \
return sprintf(page, _format, _value); \
} \
static struct kobj_attribute sys_##_prefix##_##_name##_attr = \
__ATTR(_name, S_IRUGO, sys_##_prefix##_##_name##_show, NULL);
#define DEFINE_IPL_ATTR_RW(_prefix, _name, _fmt_out, _fmt_in, _value) \
static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj, \
struct kobj_attribute *attr, \
char *page) \
{ \
return sprintf(page, _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,(S_IRUGO | S_IWUSR), \
sys_##_prefix##_##_name##_show, \
sys_##_prefix##_##_name##_store);
#define DEFINE_IPL_ATTR_STR_RW(_prefix, _name, _fmt_out, _fmt_in, _value)\
static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj, \
struct kobj_attribute *attr, \
char *page) \
{ \
return sprintf(page, _fmt_out, _value); \
} \
static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj, \
struct kobj_attribute *attr, \
const char *buf, size_t len) \
{ \
strncpy(_value, buf, sizeof(_value) - 1); \
strim(_value); \
return len; \
} \
static struct kobj_attribute sys_##_prefix##_##_name##_attr = \
__ATTR(_name,(S_IRUGO | S_IWUSR), \
sys_##_prefix##_##_name##_show, \
sys_##_prefix##_##_name##_store);
static void make_attrs_ro(struct attribute **attrs)
{
while (*attrs) {
(*attrs)->mode = S_IRUGO;
attrs++;
}
}
/*
* ipl section
*/
static __init enum ipl_type get_ipl_type(void)
{
struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START;
if (ipl_flags & IPL_NSS_VALID)
return IPL_TYPE_NSS;
if (!(ipl_flags & IPL_DEVNO_VALID))
return IPL_TYPE_UNKNOWN;
if (!(ipl_flags & IPL_PARMBLOCK_VALID))
return IPL_TYPE_CCW;
if (ipl->hdr.version > IPL_MAX_SUPPORTED_VERSION)
return IPL_TYPE_UNKNOWN;
if (ipl->hdr.pbt != DIAG308_IPL_TYPE_FCP)
return IPL_TYPE_UNKNOWN;
if (ipl->ipl_info.fcp.opt == DIAG308_IPL_OPT_DUMP)
return IPL_TYPE_FCP_DUMP;
return IPL_TYPE_FCP;
}
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);
/* VM IPL PARM routines */
static size_t reipl_get_ascii_vmparm(char *dest, size_t size,
const struct ipl_parameter_block *ipb)
{
int i;
size_t len;
char has_lowercase = 0;
len = 0;
if ((ipb->ipl_info.ccw.vm_flags & DIAG308_VM_FLAGS_VP_VALID) &&
(ipb->ipl_info.ccw.vm_parm_len > 0)) {
len = min_t(size_t, size - 1, ipb->ipl_info.ccw.vm_parm_len);
memcpy(dest, ipb->ipl_info.ccw.vm_parm, len);
/* If at least one character is lowercase, we assume mixed
* case; otherwise we convert everything to lowercase.
*/
for (i = 0; i < len; i++)
if ((dest[i] > 0x80 && dest[i] < 0x8a) || /* a-i */
(dest[i] > 0x90 && dest[i] < 0x9a) || /* j-r */
(dest[i] > 0xa1 && dest[i] < 0xaa)) { /* s-z */
has_lowercase = 1;
break;
}
if (!has_lowercase)
EBC_TOLOWER(dest, len);
EBCASC(dest, len);
}
dest[len] = 0;
return len;
}
size_t append_ipl_vmparm(char *dest, size_t size)
{
size_t rc;
rc = 0;
if (diag308_set_works && (ipl_block.hdr.pbt == DIAG308_IPL_TYPE_CCW))
rc = reipl_get_ascii_vmparm(dest, size, &ipl_block);
else
dest[0] = 0;
return rc;
}
static ssize_t ipl_vm_parm_show(struct kobject *kobj,
struct kobj_attribute *attr, char *page)
{
char parm[DIAG308_VMPARM_SIZE + 1] = {};
append_ipl_vmparm(parm, sizeof(parm));
return sprintf(page, "%s\n", parm);
}
static size_t scpdata_length(const char* buf, size_t count)
{
while (count) {
if (buf[count - 1] != '\0' && buf[count - 1] != ' ')
break;
count--;
}
return count;
}
static size_t reipl_append_ascii_scpdata(char *dest, size_t size,
const struct ipl_parameter_block *ipb)
{
size_t count;
size_t i;
int has_lowercase;
count = min(size - 1, scpdata_length(ipb->ipl_info.fcp.scp_data,
ipb->ipl_info.fcp.scp_data_len));
if (!count)
goto out;
has_lowercase = 0;
for (i = 0; i < count; i++) {
if (!isascii(ipb->ipl_info.fcp.scp_data[i])) {
count = 0;
goto out;
}
if (!has_lowercase && islower(ipb->ipl_info.fcp.scp_data[i]))
has_lowercase = 1;
}
if (has_lowercase)
memcpy(dest, ipb->ipl_info.fcp.scp_data, count);
else
for (i = 0; i < count; i++)
dest[i] = tolower(ipb->ipl_info.fcp.scp_data[i]);
out:
dest[count] = '\0';
return count;
}
size_t append_ipl_scpdata(char *dest, size_t len)
{
size_t rc;
rc = 0;
if (ipl_block.hdr.pbt == DIAG308_IPL_TYPE_FCP)
rc = reipl_append_ascii_scpdata(dest, len, &ipl_block);
else
dest[0] = 0;
return rc;
}
static struct kobj_attribute sys_ipl_vm_parm_attr =
__ATTR(parm, S_IRUGO, ipl_vm_parm_show, NULL);
static ssize_t sys_ipl_device_show(struct kobject *kobj,
struct kobj_attribute *attr, char *page)
{
struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START;
switch (ipl_info.type) {
case IPL_TYPE_CCW:
return sprintf(page, "0.0.%04x\n", ipl_devno);
case IPL_TYPE_FCP:
case IPL_TYPE_FCP_DUMP:
return sprintf(page, "0.0.%04x\n", ipl->ipl_info.fcp.devno);
default:
return 0;
}
}
static struct kobj_attribute sys_ipl_device_attr =
__ATTR(device, S_IRUGO, sys_ipl_device_show, NULL);
static ssize_t 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_PARMBLOCK_START,
IPL_PARMBLOCK_SIZE);
}
static struct bin_attribute ipl_parameter_attr = {
.attr = {
.name = "binary_parameter",
.mode = S_IRUGO,
},
.size = PAGE_SIZE,
.read = &ipl_parameter_read,
};
static ssize_t ipl_scp_data_read(struct file *filp, struct kobject *kobj,
struct bin_attribute *attr, char *buf,
loff_t off, size_t count)
{
unsigned int size = IPL_PARMBLOCK_START->ipl_info.fcp.scp_data_len;
void *scp_data = &IPL_PARMBLOCK_START->ipl_info.fcp.scp_data;
return memory_read_from_buffer(buf, count, &off, scp_data, size);
}
static struct bin_attribute ipl_scp_data_attr = {
.attr = {
.name = "scp_data",
.mode = S_IRUGO,
},
.size = PAGE_SIZE,
.read = ipl_scp_data_read,
};
/* FCP ipl device attributes */
DEFINE_IPL_ATTR_RO(ipl_fcp, wwpn, "0x%016llx\n", (unsigned long long)
IPL_PARMBLOCK_START->ipl_info.fcp.wwpn);
DEFINE_IPL_ATTR_RO(ipl_fcp, lun, "0x%016llx\n", (unsigned long long)
IPL_PARMBLOCK_START->ipl_info.fcp.lun);
DEFINE_IPL_ATTR_RO(ipl_fcp, bootprog, "%lld\n", (unsigned long long)
IPL_PARMBLOCK_START->ipl_info.fcp.bootprog);
DEFINE_IPL_ATTR_RO(ipl_fcp, br_lba, "%lld\n", (unsigned long long)
IPL_PARMBLOCK_START->ipl_info.fcp.br_lba);
static struct attribute *ipl_fcp_attrs[] = {
&sys_ipl_type_attr.attr,
&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,
NULL,
};
static struct attribute_group ipl_fcp_attr_group = {
.attrs = ipl_fcp_attrs,
};
/* CCW ipl device attributes */
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_ccw_attrs_vm[] = {
&sys_ipl_type_attr.attr,
&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_type_attr.attr,
&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
};
/* NSS ipl device attributes */
DEFINE_IPL_ATTR_RO(ipl_nss, name, "%s\n", kernel_nss_name);
static struct attribute *ipl_nss_attrs[] = {
&sys_ipl_type_attr.attr,
&sys_ipl_nss_name_attr.attr,
&sys_ipl_ccw_loadparm_attr.attr,
&sys_ipl_vm_parm_attr.attr,
NULL,
};
static struct attribute_group ipl_nss_attr_group = {
.attrs = ipl_nss_attrs,
};
/* UNKNOWN ipl device attributes */
static struct attribute *ipl_unknown_attrs[] = {
&sys_ipl_type_attr.attr,
NULL,
};
static struct attribute_group ipl_unknown_attr_group = {
.attrs = ipl_unknown_attrs,
};
static struct kset *ipl_kset;
static int __init ipl_register_fcp_files(void)
{
int rc;
rc = sysfs_create_group(&ipl_kset->kobj, &ipl_fcp_attr_group);
if (rc)
goto out;
rc = sysfs_create_bin_file(&ipl_kset->kobj, &ipl_parameter_attr);
if (rc)
goto out_ipl_parm;
rc = sysfs_create_bin_file(&ipl_kset->kobj, &ipl_scp_data_attr);
if (!rc)
goto out;
sysfs_remove_bin_file(&ipl_kset->kobj, &ipl_parameter_attr);
out_ipl_parm:
sysfs_remove_group(&ipl_kset->kobj, &ipl_fcp_attr_group);
out:
return rc;
}
static void __ipl_run(void *unused)
{
diag308(DIAG308_IPL, NULL);
if (MACHINE_IS_VM)
__cpcmd("IPL", NULL, 0, NULL);
else if (ipl_info.type == IPL_TYPE_CCW)
reipl_ccw_dev(&ipl_info.data.ccw.dev_id);
}
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;
}
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_FCP:
case IPL_TYPE_FCP_DUMP:
rc = ipl_register_fcp_files();
break;
case IPL_TYPE_NSS:
rc = sysfs_create_group(&ipl_kset->kobj, &ipl_nss_attr_group);
break;
default:
rc = sysfs_create_group(&ipl_kset->kobj,
&ipl_unknown_attr_group);
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] = {};
reipl_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->ipl_info.ccw.vm_parm, 0, DIAG308_VMPARM_SIZE);
ipb->ipl_info.ccw.vm_parm_len = ip_len;
if (ip_len > 0) {
ipb->ipl_info.ccw.vm_flags |= DIAG308_VM_FLAGS_VP_VALID;
memcpy(ipb->ipl_info.ccw.vm_parm, buf, ip_len);
ASCEBC(ipb->ipl_info.ccw.vm_parm, ip_len);
} else {
ipb->ipl_info.ccw.vm_flags &= ~DIAG308_VM_FLAGS_VP_VALID;
}
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, S_IRUGO | S_IWUSR, reipl_nss_vmparm_show,
reipl_nss_vmparm_store);
static struct kobj_attribute sys_reipl_ccw_vmparm_attr =
__ATTR(parm, S_IRUGO | S_IWUSR, reipl_ccw_vmparm_show,
reipl_ccw_vmparm_store);
/* FCP reipl device attributes */
static ssize_t reipl_fcp_scpdata_read(struct file *filp, struct kobject *kobj,
struct bin_attribute *attr,
char *buf, loff_t off, size_t count)
{
size_t size = reipl_block_fcp->ipl_info.fcp.scp_data_len;
void *scp_data = reipl_block_fcp->ipl_info.fcp.scp_data;
return memory_read_from_buffer(buf, count, &off, scp_data, size);
}
static ssize_t reipl_fcp_scpdata_write(struct file *filp, struct kobject *kobj,
struct bin_attribute *attr,
char *buf, loff_t off, size_t count)
{
size_t padding;
size_t scpdata_len;
if (off < 0)
return -EINVAL;
if (off >= DIAG308_SCPDATA_SIZE)
return -ENOSPC;
if (count > DIAG308_SCPDATA_SIZE - off)
count = DIAG308_SCPDATA_SIZE - off;
memcpy(reipl_block_fcp->ipl_info.fcp.scp_data, buf + off, count);
scpdata_len = off + count;
if (scpdata_len % 8) {
padding = 8 - (scpdata_len % 8);
memset(reipl_block_fcp->ipl_info.fcp.scp_data + scpdata_len,
0, padding);
scpdata_len += padding;
}
reipl_block_fcp->ipl_info.fcp.scp_data_len = scpdata_len;
reipl_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN + scpdata_len;
reipl_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN + scpdata_len;
return count;
}
static struct bin_attribute sys_reipl_fcp_scp_data_attr = {
.attr = {
.name = "scp_data",
.mode = S_IRUGO | S_IWUSR,
},
.size = PAGE_SIZE,
.read = reipl_fcp_scpdata_read,
.write = reipl_fcp_scpdata_write,
};
DEFINE_IPL_ATTR_RW(reipl_fcp, wwpn, "0x%016llx\n", "%llx\n",
reipl_block_fcp->ipl_info.fcp.wwpn);
DEFINE_IPL_ATTR_RW(reipl_fcp, lun, "0x%016llx\n", "%llx\n",
reipl_block_fcp->ipl_info.fcp.lun);
DEFINE_IPL_ATTR_RW(reipl_fcp, bootprog, "%lld\n", "%lld\n",
reipl_block_fcp->ipl_info.fcp.bootprog);
DEFINE_IPL_ATTR_RW(reipl_fcp, br_lba, "%lld\n", "%lld\n",
reipl_block_fcp->ipl_info.fcp.br_lba);
DEFINE_IPL_ATTR_RW(reipl_fcp, device, "0.0.%04llx\n", "0.0.%llx\n",
reipl_block_fcp->ipl_info.fcp.devno);
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,
NULL,
};
static struct attribute_group reipl_fcp_attr_group = {
.attrs = reipl_fcp_attrs,
};
/* CCW reipl device attributes */
DEFINE_IPL_ATTR_RW(reipl_ccw, device, "0.0.%04llx\n", "0.0.%llx\n",
reipl_block_ccw->ipl_info.ccw.devno);
static void reipl_get_ascii_loadparm(char *loadparm,
struct ipl_parameter_block *ibp)
{
memcpy(loadparm, ibp->ipl_info.ccw.load_parm, 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->ipl_info.ccw.load_parm, ' ', LOADPARM_LEN);
/* copy and convert to ebcdic */
memcpy(ipb->ipl_info.ccw.load_parm, buf, lp_len);
ASCEBC(ipb->ipl_info.ccw.load_parm, LOADPARM_LEN);
return len;
}
/* NSS wrapper */
static ssize_t reipl_nss_loadparm_show(struct kobject *kobj,
struct kobj_attribute *attr, char *page)
{
return reipl_generic_loadparm_show(reipl_block_nss, page);
}
static ssize_t reipl_nss_loadparm_store(struct kobject *kobj,
struct kobj_attribute *attr,
const char *buf, size_t len)
{
return reipl_generic_loadparm_store(reipl_block_nss, buf, len);
}
/* CCW wrapper */
static ssize_t reipl_ccw_loadparm_show(struct kobject *kobj,
struct kobj_attribute *attr, char *page)
{
return reipl_generic_loadparm_show(reipl_block_ccw, page);
}
static ssize_t reipl_ccw_loadparm_store(struct kobject *kobj,
struct kobj_attribute *attr,
const char *buf, size_t len)
{
return reipl_generic_loadparm_store(reipl_block_ccw, buf, len);
}
static struct kobj_attribute sys_reipl_ccw_loadparm_attr =
__ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_ccw_loadparm_show,
reipl_ccw_loadparm_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,
NULL,
};
static struct attribute *reipl_ccw_attrs_lpar[] = {
&sys_reipl_ccw_device_attr.attr,
&sys_reipl_ccw_loadparm_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,
};
/* NSS reipl device attributes */
static void reipl_get_ascii_nss_name(char *dst,
struct ipl_parameter_block *ipb)
{
memcpy(dst, ipb->ipl_info.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->ipl_info.ccw.nss_name, 0x40, NSS_NAME_SIZE);
if (nss_len > 0) {
reipl_block_nss->ipl_info.ccw.vm_flags |=
DIAG308_VM_FLAGS_NSS_VALID;
memcpy(reipl_block_nss->ipl_info.ccw.nss_name, buf, nss_len);
ASCEBC(reipl_block_nss->ipl_info.ccw.nss_name, nss_len);
EBC_TOUPPER(reipl_block_nss->ipl_info.ccw.nss_name, nss_len);
} else {
reipl_block_nss->ipl_info.ccw.vm_flags &=
~DIAG308_VM_FLAGS_NSS_VALID;
}
return len;
}
static struct kobj_attribute sys_reipl_nss_name_attr =
__ATTR(name, S_IRUGO | S_IWUSR, reipl_nss_name_show,
reipl_nss_name_store);
static struct kobj_attribute sys_reipl_nss_loadparm_attr =
__ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_nss_loadparm_show,
reipl_nss_loadparm_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,
};
static void set_reipl_block_actual(struct ipl_parameter_block *reipl_block)
{
reipl_block_actual = reipl_block;
os_info_entry_add(OS_INFO_REIPL_BLOCK, reipl_block_actual,
reipl_block->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:
if (diag308_set_works)
reipl_method = REIPL_METHOD_CCW_DIAG;
else if (MACHINE_IS_VM)
reipl_method = REIPL_METHOD_CCW_VM;
else
reipl_method = REIPL_METHOD_CCW_CIO;
set_reipl_block_actual(reipl_block_ccw);
break;
case IPL_TYPE_FCP:
if (diag308_set_works)
reipl_method = REIPL_METHOD_FCP_RW_DIAG;
else if (MACHINE_IS_VM)
reipl_method = REIPL_METHOD_FCP_RO_VM;
else
reipl_method = REIPL_METHOD_FCP_RO_DIAG;
set_reipl_block_actual(reipl_block_fcp);
break;
case IPL_TYPE_FCP_DUMP:
reipl_method = REIPL_METHOD_FCP_DUMP;
break;
case IPL_TYPE_NSS:
if (diag308_set_works)
reipl_method = REIPL_METHOD_NSS_DIAG;
else
reipl_method = REIPL_METHOD_NSS;
set_reipl_block_actual(reipl_block_nss);
break;
case IPL_TYPE_UNKNOWN:
reipl_method = REIPL_METHOD_DEFAULT;
break;
default:
BUG();
}
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_FCP_STR, strlen(IPL_FCP_STR)) == 0)
rc = reipl_set_type(IPL_TYPE_FCP);
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 void get_ipl_string(char *dst, struct ipl_parameter_block *ipb,
const enum ipl_method m)
{
char loadparm[LOADPARM_LEN + 1] = {};
char vmparm[DIAG308_VMPARM_SIZE + 1] = {};
char nss_name[NSS_NAME_SIZE + 1] = {};
size_t pos = 0;
reipl_get_ascii_loadparm(loadparm, ipb);
reipl_get_ascii_nss_name(nss_name, ipb);
reipl_get_ascii_vmparm(vmparm, sizeof(vmparm), ipb);
switch (m) {
case REIPL_METHOD_CCW_VM:
pos = sprintf(dst, "IPL %X CLEAR", ipb->ipl_info.ccw.devno);
break;
case REIPL_METHOD_NSS:
pos = sprintf(dst, "IPL %s", nss_name);
break;
default:
break;
}
if (strlen(loadparm) > 0)
pos += sprintf(dst + pos, " LOADPARM '%s'", loadparm);
if (strlen(vmparm) > 0)
sprintf(dst + pos, " PARM %s", vmparm);
}
static void __reipl_run(void *unused)
{
struct ccw_dev_id devid;
static char buf[128];
switch (reipl_method) {
case REIPL_METHOD_CCW_CIO:
devid.devno = reipl_block_ccw->ipl_info.ccw.devno;
devid.ssid = 0;
reipl_ccw_dev(&devid);
break;
case REIPL_METHOD_CCW_VM:
get_ipl_string(buf, reipl_block_ccw, REIPL_METHOD_CCW_VM);
__cpcmd(buf, NULL, 0, NULL);
break;
case REIPL_METHOD_CCW_DIAG:
diag308(DIAG308_SET, reipl_block_ccw);
diag308(DIAG308_IPL, NULL);
break;
case REIPL_METHOD_FCP_RW_DIAG:
diag308(DIAG308_SET, reipl_block_fcp);
diag308(DIAG308_IPL, NULL);
break;
case REIPL_METHOD_FCP_RO_DIAG:
diag308(DIAG308_IPL, NULL);
break;
case REIPL_METHOD_FCP_RO_VM:
__cpcmd("IPL", NULL, 0, NULL);
break;
case REIPL_METHOD_NSS_DIAG:
diag308(DIAG308_SET, reipl_block_nss);
diag308(DIAG308_IPL, NULL);
break;
case REIPL_METHOD_NSS:
get_ipl_string(buf, reipl_block_nss, REIPL_METHOD_NSS);
__cpcmd(buf, NULL, 0, NULL);
break;
case REIPL_METHOD_DEFAULT:
if (MACHINE_IS_VM)
__cpcmd("IPL", NULL, 0, NULL);
diag308(DIAG308_IPL, NULL);
break;
case REIPL_METHOD_FCP_DUMP:
break;
}
disabled_wait((unsigned long) __builtin_return_address(0));
}
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_PARM_BLK_CCW_LEN;
ipb->hdr.version = IPL_PARM_BLOCK_VERSION;
ipb->hdr.blk0_len = IPL_PARM_BLK0_CCW_LEN;
ipb->hdr.pbt = DIAG308_IPL_TYPE_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->ipl_info.ccw.load_parm,
&sclp_ipl_info.loadparm, LOADPARM_LEN);
else
/* read scp info failed: set empty loadparm (EBCDIC blanks) */
memset(ipb->ipl_info.ccw.load_parm, 0x40, LOADPARM_LEN);
ipb->hdr.flags = DIAG308_FLAGS_LP_VALID;
/* VM PARM */
if (MACHINE_IS_VM && diag308_set_works &&
(ipl_block.ipl_info.ccw.vm_flags & DIAG308_VM_FLAGS_VP_VALID)) {
ipb->ipl_info.ccw.vm_flags |= DIAG308_VM_FLAGS_VP_VALID;
ipb->ipl_info.ccw.vm_parm_len =
ipl_block.ipl_info.ccw.vm_parm_len;
memcpy(ipb->ipl_info.ccw.vm_parm,
ipl_block.ipl_info.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;
if (!diag308_set_works)
sys_reipl_nss_vmparm_attr.attr.mode = S_IRUGO;
rc = sysfs_create_group(&reipl_kset->kobj, &reipl_nss_attr_group);
if (rc)
return rc;
reipl_block_ccw_init(reipl_block_nss);
if (ipl_info.type == IPL_TYPE_NSS) {
memset(reipl_block_nss->ipl_info.ccw.nss_name,
' ', NSS_NAME_SIZE);
memcpy(reipl_block_nss->ipl_info.ccw.nss_name,
kernel_nss_name, strlen(kernel_nss_name));
ASCEBC(reipl_block_nss->ipl_info.ccw.nss_name, NSS_NAME_SIZE);
reipl_block_nss->ipl_info.ccw.vm_flags |=
DIAG308_VM_FLAGS_NSS_VALID;
reipl_block_ccw_fill_parms(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;
if (MACHINE_IS_VM) {
if (!diag308_set_works)
sys_reipl_ccw_vmparm_attr.attr.mode = S_IRUGO;
rc = sysfs_create_group(&reipl_kset->kobj,
&reipl_ccw_attr_group_vm);
} else {
if(!diag308_set_works)
sys_reipl_ccw_loadparm_attr.attr.mode = S_IRUGO;
rc = sysfs_create_group(&reipl_kset->kobj,
&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->ipl_info.ccw.devno = ipl_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;
if (!diag308_set_works) {
if (ipl_info.type == IPL_TYPE_FCP) {
make_attrs_ro(reipl_fcp_attrs);
sys_reipl_fcp_scp_data_attr.attr.mode = S_IRUGO;
} else
return 0;
}
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) {
kset_unregister(reipl_fcp_kset);
free_page((unsigned long) reipl_block_fcp);
return rc;
}
rc = sysfs_create_bin_file(&reipl_fcp_kset->kobj,
&sys_reipl_fcp_scp_data_attr);
if (rc) {
sysfs_remove_group(&reipl_fcp_kset->kobj, &reipl_fcp_attr_group);
kset_unregister(reipl_fcp_kset);
free_page((unsigned long) reipl_block_fcp);
return rc;
}
if (ipl_info.type == IPL_TYPE_FCP)
memcpy(reipl_block_fcp, IPL_PARMBLOCK_START, PAGE_SIZE);
else {
reipl_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN;
reipl_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION;
reipl_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN;
reipl_block_fcp->hdr.pbt = DIAG308_IPL_TYPE_FCP;
reipl_block_fcp->ipl_info.fcp.opt = DIAG308_IPL_OPT_IPL;
}
reipl_capabilities |= IPL_TYPE_FCP;
return 0;
}
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->hdr.pbt == DIAG308_IPL_TYPE_FCP) {
memcpy(reipl_block_fcp, reipl_block, size);
reipl_type = IPL_TYPE_FCP;
} else if (reipl_block->hdr.pbt == DIAG308_IPL_TYPE_CCW) {
memcpy(reipl_block_ccw, reipl_block, size);
reipl_type = IPL_TYPE_CCW;
}
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_fcp_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->ipl_info.fcp.wwpn);
DEFINE_IPL_ATTR_RW(dump_fcp, lun, "0x%016llx\n", "%llx\n",
dump_block_fcp->ipl_info.fcp.lun);
DEFINE_IPL_ATTR_RW(dump_fcp, bootprog, "%lld\n", "%lld\n",
dump_block_fcp->ipl_info.fcp.bootprog);
DEFINE_IPL_ATTR_RW(dump_fcp, br_lba, "%lld\n", "%lld\n",
dump_block_fcp->ipl_info.fcp.br_lba);
DEFINE_IPL_ATTR_RW(dump_fcp, device, "0.0.%04llx\n", "0.0.%llx\n",
dump_block_fcp->ipl_info.fcp.devno);
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 attribute_group dump_fcp_attr_group = {
.name = IPL_FCP_STR,
.attrs = dump_fcp_attrs,
};
/* CCW dump device attributes */
DEFINE_IPL_ATTR_RW(dump_ccw, device, "0.0.%04llx\n", "0.0.%llx\n",
dump_block_ccw->ipl_info.ccw.devno);
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;
switch (type) {
case DUMP_TYPE_CCW:
if (diag308_set_works)
dump_method = DUMP_METHOD_CCW_DIAG;
else if (MACHINE_IS_VM)
dump_method = DUMP_METHOD_CCW_VM;
else
dump_method = DUMP_METHOD_CCW_CIO;
break;
case DUMP_TYPE_FCP:
dump_method = DUMP_METHOD_FCP_DIAG;
break;
default:
dump_method = DUMP_METHOD_NONE;
}
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_FCP_STR, strlen(DUMP_FCP_STR)) == 0)
rc = dump_set_type(DUMP_TYPE_FCP);
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_DUMP, NULL) != 0x302)
break;
udelay_simple(USEC_PER_SEC);
}
}
static void __dump_run(void *unused)
{
struct ccw_dev_id devid;
static char buf[100];
switch (dump_method) {
case DUMP_METHOD_CCW_CIO:
devid.devno = dump_block_ccw->ipl_info.ccw.devno;
devid.ssid = 0;
reipl_ccw_dev(&devid);
break;
case DUMP_METHOD_CCW_VM:
sprintf(buf, "STORE STATUS");
__cpcmd(buf, NULL, 0, NULL);
sprintf(buf, "IPL %X", dump_block_ccw->ipl_info.ccw.devno);
__cpcmd(buf, NULL, 0, NULL);
break;
case DUMP_METHOD_CCW_DIAG:
diag308_dump(dump_block_ccw);
break;
case DUMP_METHOD_FCP_DIAG:
diag308_dump(dump_block_fcp);
break;
default:
break;
}
}
static void dump_run(struct shutdown_trigger *trigger)
{
if (dump_method == DUMP_METHOD_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_PARM_BLK_CCW_LEN;
dump_block_ccw->hdr.version = IPL_PARM_BLOCK_VERSION;
dump_block_ccw->hdr.blk0_len = IPL_PARM_BLK0_CCW_LEN;
dump_block_ccw->hdr.pbt = DIAG308_IPL_TYPE_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 */
if (!diag308_set_works)
return 0;
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_PARM_BLK_FCP_LEN;
dump_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION;
dump_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN;
dump_block_fcp->hdr.pbt = DIAG308_IPL_TYPE_FCP;
dump_block_fcp->ipl_info.fcp.opt = DIAG308_IPL_OPT_DUMP;
dump_capabilities |= DUMP_TYPE_FCP;
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_fcp_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)
{
unsigned long ipib = (unsigned long) reipl_block_actual;
unsigned int csum;
csum = csum_partial(reipl_block_actual, reipl_block_actual->hdr.len, 0);
mem_assign_absolute(S390_lowcore.ipib, ipib);
mem_assign_absolute(S390_lowcore.ipib_checksum, csum);
dump_run(trigger);
}
static int __init dump_reipl_init(void)
{
if (!diag308_set_works)
return -EOPNOTSUPP;
else
return 0;
}
static struct shutdown_action __refdata dump_reipl_action = {
.name = SHUTDOWN_ACTION_DUMP_REIPL_STR,
.fn = dump_reipl_run,
.init = dump_reipl_init,
};
/*
* vmcmd shutdown action: Trigger vm command on shutdown.
*/
static char vmcmd_on_reboot[128];
static char vmcmd_on_panic[128];
static char vmcmd_on_halt[128];
static char vmcmd_on_poff[128];
static char vmcmd_on_restart[128];
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((unsigned long) __builtin_return_address(0));
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(on_reboot, 0644, on_reboot_show, on_reboot_store);
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(on_panic, 0644, on_panic_show, on_panic_store);
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(on_restart, 0644, on_restart_show, on_restart_store);
static void __do_restart(void *ignore)
{
__arch_local_irq_stosm(0x04); /* enable DAT */
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)
{
tracing_off();
debug_locks_off();
lgr_info_log();
smp_call_online_cpu(__do_restart, NULL);
}
/* 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(on_halt, 0644, on_halt_show, on_halt_store);
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(on_poff, 0644, on_poff_show, on_poff_store);
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 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_file(&shutdown_actions_kset->kobj,
&on_reboot_attr.attr))
goto fail;
if (sysfs_create_file(&shutdown_actions_kset->kobj,
&on_panic_attr.attr))
goto fail;
if (sysfs_create_file(&shutdown_actions_kset->kobj,
&on_halt_attr.attr))
goto fail;
if (sysfs_create_file(&shutdown_actions_kset->kobj,
&on_poff_attr.attr))
goto fail;
if (sysfs_create_file(&shutdown_actions_kset->kobj,
&on_restart_attr.attr))
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)
{
sclp_get_ipl_info(&sclp_ipl_info);
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, 127);
vmcmd_on_reboot[127] = 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, 127);
vmcmd_on_panic[127] = 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, 127);
vmcmd_on_halt[127] = 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, 127);
vmcmd_on_poff[127] = 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)
{
ipl_info.type = get_ipl_type();
switch (ipl_info.type) {
case IPL_TYPE_CCW:
ipl_info.data.ccw.dev_id.devno = ipl_devno;
ipl_info.data.ccw.dev_id.ssid = 0;
break;
case IPL_TYPE_FCP:
case IPL_TYPE_FCP_DUMP:
ipl_info.data.fcp.dev_id.devno =
IPL_PARMBLOCK_START->ipl_info.fcp.devno;
ipl_info.data.fcp.dev_id.ssid = 0;
ipl_info.data.fcp.wwpn = IPL_PARMBLOCK_START->ipl_info.fcp.wwpn;
ipl_info.data.fcp.lun = IPL_PARMBLOCK_START->ipl_info.fcp.lun;
break;
case IPL_TYPE_NSS:
strncpy(ipl_info.data.nss.name, kernel_nss_name,
sizeof(ipl_info.data.nss.name));
break;
case IPL_TYPE_UNKNOWN:
/* We have no info to copy */
break;
}
atomic_notifier_chain_register(&panic_notifier_list, &on_panic_nb);
}
void __init ipl_update_parameters(void)
{
int rc;
rc = diag308(DIAG308_STORE, &ipl_block);
if ((rc == DIAG308_RC_OK) || (rc == DIAG308_RC_NOCONFIG))
diag308_set_works = 1;
}
void __init ipl_save_parameters(void)
{
struct cio_iplinfo iplinfo;
void *src, *dst;
if (cio_get_iplinfo(&iplinfo))
return;
ipl_devno = iplinfo.devno;
ipl_flags |= IPL_DEVNO_VALID;
if (!iplinfo.is_qdio)
return;
ipl_flags |= IPL_PARMBLOCK_VALID;
src = (void *)(unsigned long)S390_lowcore.ipl_parmblock_ptr;
dst = (void *)IPL_PARMBLOCK_ORIGIN;
memmove(dst, src, PAGE_SIZE);
S390_lowcore.ipl_parmblock_ptr = IPL_PARMBLOCK_ORIGIN;
}
static LIST_HEAD(rcall);
static DEFINE_MUTEX(rcall_mutex);
void register_reset_call(struct reset_call *reset)
{
mutex_lock(&rcall_mutex);
list_add(&reset->list, &rcall);
mutex_unlock(&rcall_mutex);
}
EXPORT_SYMBOL_GPL(register_reset_call);
void unregister_reset_call(struct reset_call *reset)
{
mutex_lock(&rcall_mutex);
list_del(&reset->list);
mutex_unlock(&rcall_mutex);
}
EXPORT_SYMBOL_GPL(unregister_reset_call);
static void do_reset_calls(void)
{
struct reset_call *reset;
#ifdef CONFIG_64BIT
if (diag308_set_works) {
diag308_reset();
return;
}
#endif
list_for_each_entry(reset, &rcall, list)
reset->fn();
}
u32 dump_prefix_page;
void s390_reset_system(void (*func)(void *), void *data)
{
struct _lowcore *lc;
lc = (struct _lowcore *)(unsigned long) store_prefix();
/* Stack for interrupt/machine check handler */
lc->panic_stack = S390_lowcore.panic_stack;
/* Save prefix page address for dump case */
dump_prefix_page = (u32)(unsigned long) lc;
/* Disable prefixing */
set_prefix(0);
/* Disable lowcore protection */
__ctl_clear_bit(0,28);
/* Set new machine check handler */
S390_lowcore.mcck_new_psw.mask = PSW_KERNEL_BITS | PSW_MASK_DAT;
S390_lowcore.mcck_new_psw.addr =
PSW_ADDR_AMODE | (unsigned long) s390_base_mcck_handler;
/* Set new program check handler */
S390_lowcore.program_new_psw.mask = PSW_KERNEL_BITS | PSW_MASK_DAT;
S390_lowcore.program_new_psw.addr =
PSW_ADDR_AMODE | (unsigned long) s390_base_pgm_handler;
/*
* Clear subchannel ID and number to signal new kernel that no CCW or
* SCSI IPL has been done (for kexec and kdump)
*/
S390_lowcore.subchannel_id = 0;
S390_lowcore.subchannel_nr = 0;
/* Store status at absolute zero */
store_status();
do_reset_calls();
if (func)
func(data);
}