![Martin Schwidefsky](/assets/img/avatar_default.png)
Simplify the uaccess code by removing the user_mode=home option. The kernel will now always run in the home space mode. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2070 lines
51 KiB
C
2070 lines
51 KiB
C
/*
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* ipl/reipl/dump support for Linux on s390.
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*
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* Copyright IBM Corp. 2005, 2012
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* Author(s): Michael Holzheu <holzheu@de.ibm.com>
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* Heiko Carstens <heiko.carstens@de.ibm.com>
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* Volker Sameske <sameske@de.ibm.com>
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*/
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#include <linux/types.h>
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#include <linux/module.h>
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#include <linux/device.h>
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#include <linux/delay.h>
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#include <linux/reboot.h>
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#include <linux/ctype.h>
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#include <linux/fs.h>
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#include <linux/gfp.h>
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#include <linux/crash_dump.h>
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#include <linux/debug_locks.h>
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#include <asm/ipl.h>
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#include <asm/smp.h>
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#include <asm/setup.h>
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#include <asm/cpcmd.h>
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#include <asm/cio.h>
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#include <asm/ebcdic.h>
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#include <asm/reset.h>
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#include <asm/sclp.h>
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#include <asm/checksum.h>
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#include <asm/debug.h>
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#include <asm/os_info.h>
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#include "entry.h"
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#define IPL_PARM_BLOCK_VERSION 0
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#define IPL_UNKNOWN_STR "unknown"
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#define IPL_CCW_STR "ccw"
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#define IPL_FCP_STR "fcp"
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#define IPL_FCP_DUMP_STR "fcp_dump"
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#define IPL_NSS_STR "nss"
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#define DUMP_CCW_STR "ccw"
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#define DUMP_FCP_STR "fcp"
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#define DUMP_NONE_STR "none"
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/*
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* Four shutdown trigger types are supported:
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* - panic
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* - halt
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* - power off
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* - reipl
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* - restart
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*/
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#define ON_PANIC_STR "on_panic"
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#define ON_HALT_STR "on_halt"
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#define ON_POFF_STR "on_poff"
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#define ON_REIPL_STR "on_reboot"
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#define ON_RESTART_STR "on_restart"
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struct shutdown_action;
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struct shutdown_trigger {
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char *name;
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struct shutdown_action *action;
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};
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/*
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* The following shutdown action types are supported:
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*/
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#define SHUTDOWN_ACTION_IPL_STR "ipl"
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#define SHUTDOWN_ACTION_REIPL_STR "reipl"
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#define SHUTDOWN_ACTION_DUMP_STR "dump"
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#define SHUTDOWN_ACTION_VMCMD_STR "vmcmd"
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#define SHUTDOWN_ACTION_STOP_STR "stop"
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#define SHUTDOWN_ACTION_DUMP_REIPL_STR "dump_reipl"
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struct shutdown_action {
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char *name;
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void (*fn) (struct shutdown_trigger *trigger);
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int (*init) (void);
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int init_rc;
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};
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static char *ipl_type_str(enum ipl_type type)
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{
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switch (type) {
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case IPL_TYPE_CCW:
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return IPL_CCW_STR;
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case IPL_TYPE_FCP:
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return IPL_FCP_STR;
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case IPL_TYPE_FCP_DUMP:
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return IPL_FCP_DUMP_STR;
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case IPL_TYPE_NSS:
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return IPL_NSS_STR;
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case IPL_TYPE_UNKNOWN:
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default:
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return IPL_UNKNOWN_STR;
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}
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}
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enum dump_type {
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DUMP_TYPE_NONE = 1,
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DUMP_TYPE_CCW = 2,
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DUMP_TYPE_FCP = 4,
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};
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static char *dump_type_str(enum dump_type type)
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{
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switch (type) {
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case DUMP_TYPE_NONE:
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return DUMP_NONE_STR;
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case DUMP_TYPE_CCW:
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return DUMP_CCW_STR;
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case DUMP_TYPE_FCP:
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return DUMP_FCP_STR;
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default:
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return NULL;
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}
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}
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/*
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* Must be in data section since the bss section
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* is not cleared when these are accessed.
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*/
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static u16 ipl_devno __attribute__((__section__(".data"))) = 0;
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u32 ipl_flags __attribute__((__section__(".data"))) = 0;
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enum ipl_method {
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REIPL_METHOD_CCW_CIO,
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REIPL_METHOD_CCW_DIAG,
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REIPL_METHOD_CCW_VM,
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REIPL_METHOD_FCP_RO_DIAG,
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REIPL_METHOD_FCP_RW_DIAG,
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REIPL_METHOD_FCP_RO_VM,
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REIPL_METHOD_FCP_DUMP,
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REIPL_METHOD_NSS,
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REIPL_METHOD_NSS_DIAG,
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REIPL_METHOD_DEFAULT,
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};
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enum dump_method {
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DUMP_METHOD_NONE,
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DUMP_METHOD_CCW_CIO,
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DUMP_METHOD_CCW_DIAG,
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DUMP_METHOD_CCW_VM,
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DUMP_METHOD_FCP_DIAG,
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};
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static int diag308_set_works = 0;
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static struct ipl_parameter_block ipl_block;
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static int reipl_capabilities = IPL_TYPE_UNKNOWN;
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static enum ipl_type reipl_type = IPL_TYPE_UNKNOWN;
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static enum ipl_method reipl_method = REIPL_METHOD_DEFAULT;
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static struct ipl_parameter_block *reipl_block_fcp;
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static struct ipl_parameter_block *reipl_block_ccw;
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static struct ipl_parameter_block *reipl_block_nss;
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static struct ipl_parameter_block *reipl_block_actual;
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static int dump_capabilities = DUMP_TYPE_NONE;
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static enum dump_type dump_type = DUMP_TYPE_NONE;
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static enum dump_method dump_method = DUMP_METHOD_NONE;
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static struct ipl_parameter_block *dump_block_fcp;
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static struct ipl_parameter_block *dump_block_ccw;
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static struct sclp_ipl_info sclp_ipl_info;
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int diag308(unsigned long subcode, void *addr)
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{
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register unsigned long _addr asm("0") = (unsigned long) addr;
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register unsigned long _rc asm("1") = 0;
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asm volatile(
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" diag %0,%2,0x308\n"
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"0:\n"
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EX_TABLE(0b,0b)
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: "+d" (_addr), "+d" (_rc)
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: "d" (subcode) : "cc", "memory");
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return _rc;
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}
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EXPORT_SYMBOL_GPL(diag308);
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/* SYSFS */
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#define DEFINE_IPL_ATTR_RO(_prefix, _name, _format, _value) \
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static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj, \
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struct kobj_attribute *attr, \
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char *page) \
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{ \
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return sprintf(page, _format, _value); \
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} \
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static struct kobj_attribute sys_##_prefix##_##_name##_attr = \
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__ATTR(_name, S_IRUGO, sys_##_prefix##_##_name##_show, NULL);
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#define DEFINE_IPL_ATTR_RW(_prefix, _name, _fmt_out, _fmt_in, _value) \
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static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj, \
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struct kobj_attribute *attr, \
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char *page) \
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{ \
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return sprintf(page, _fmt_out, \
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(unsigned long long) _value); \
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} \
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static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj, \
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struct kobj_attribute *attr, \
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const char *buf, size_t len) \
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{ \
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unsigned long long value; \
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if (sscanf(buf, _fmt_in, &value) != 1) \
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return -EINVAL; \
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_value = value; \
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return len; \
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} \
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static struct kobj_attribute sys_##_prefix##_##_name##_attr = \
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__ATTR(_name,(S_IRUGO | S_IWUSR), \
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sys_##_prefix##_##_name##_show, \
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sys_##_prefix##_##_name##_store);
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#define DEFINE_IPL_ATTR_STR_RW(_prefix, _name, _fmt_out, _fmt_in, _value)\
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static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj, \
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struct kobj_attribute *attr, \
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char *page) \
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{ \
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return sprintf(page, _fmt_out, _value); \
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} \
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static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj, \
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struct kobj_attribute *attr, \
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const char *buf, size_t len) \
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{ \
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strncpy(_value, buf, sizeof(_value) - 1); \
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strim(_value); \
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return len; \
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} \
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static struct kobj_attribute sys_##_prefix##_##_name##_attr = \
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__ATTR(_name,(S_IRUGO | S_IWUSR), \
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sys_##_prefix##_##_name##_show, \
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sys_##_prefix##_##_name##_store);
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static void make_attrs_ro(struct attribute **attrs)
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{
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while (*attrs) {
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(*attrs)->mode = S_IRUGO;
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attrs++;
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}
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}
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/*
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* ipl section
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*/
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static __init enum ipl_type get_ipl_type(void)
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{
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struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START;
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if (ipl_flags & IPL_NSS_VALID)
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return IPL_TYPE_NSS;
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if (!(ipl_flags & IPL_DEVNO_VALID))
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return IPL_TYPE_UNKNOWN;
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if (!(ipl_flags & IPL_PARMBLOCK_VALID))
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return IPL_TYPE_CCW;
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if (ipl->hdr.version > IPL_MAX_SUPPORTED_VERSION)
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return IPL_TYPE_UNKNOWN;
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if (ipl->hdr.pbt != DIAG308_IPL_TYPE_FCP)
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return IPL_TYPE_UNKNOWN;
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if (ipl->ipl_info.fcp.opt == DIAG308_IPL_OPT_DUMP)
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return IPL_TYPE_FCP_DUMP;
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return IPL_TYPE_FCP;
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}
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struct ipl_info ipl_info;
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EXPORT_SYMBOL_GPL(ipl_info);
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static ssize_t ipl_type_show(struct kobject *kobj, struct kobj_attribute *attr,
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char *page)
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{
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return sprintf(page, "%s\n", ipl_type_str(ipl_info.type));
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}
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static struct kobj_attribute sys_ipl_type_attr = __ATTR_RO(ipl_type);
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/* VM IPL PARM routines */
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static size_t reipl_get_ascii_vmparm(char *dest, size_t size,
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const struct ipl_parameter_block *ipb)
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{
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int i;
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size_t len;
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char has_lowercase = 0;
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len = 0;
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if ((ipb->ipl_info.ccw.vm_flags & DIAG308_VM_FLAGS_VP_VALID) &&
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(ipb->ipl_info.ccw.vm_parm_len > 0)) {
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len = min_t(size_t, size - 1, ipb->ipl_info.ccw.vm_parm_len);
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memcpy(dest, ipb->ipl_info.ccw.vm_parm, len);
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/* If at least one character is lowercase, we assume mixed
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* case; otherwise we convert everything to lowercase.
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*/
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for (i = 0; i < len; i++)
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if ((dest[i] > 0x80 && dest[i] < 0x8a) || /* a-i */
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(dest[i] > 0x90 && dest[i] < 0x9a) || /* j-r */
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(dest[i] > 0xa1 && dest[i] < 0xaa)) { /* s-z */
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has_lowercase = 1;
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break;
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}
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if (!has_lowercase)
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EBC_TOLOWER(dest, len);
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EBCASC(dest, len);
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}
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dest[len] = 0;
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return len;
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}
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size_t append_ipl_vmparm(char *dest, size_t size)
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{
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size_t rc;
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rc = 0;
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if (diag308_set_works && (ipl_block.hdr.pbt == DIAG308_IPL_TYPE_CCW))
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rc = reipl_get_ascii_vmparm(dest, size, &ipl_block);
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else
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dest[0] = 0;
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return rc;
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}
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static ssize_t ipl_vm_parm_show(struct kobject *kobj,
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struct kobj_attribute *attr, char *page)
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{
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char parm[DIAG308_VMPARM_SIZE + 1] = {};
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append_ipl_vmparm(parm, sizeof(parm));
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return sprintf(page, "%s\n", parm);
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}
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static size_t scpdata_length(const char* buf, size_t count)
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{
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while (count) {
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if (buf[count - 1] != '\0' && buf[count - 1] != ' ')
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break;
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count--;
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}
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return count;
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}
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static size_t reipl_append_ascii_scpdata(char *dest, size_t size,
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const struct ipl_parameter_block *ipb)
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{
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size_t count;
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size_t i;
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int has_lowercase;
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count = min(size - 1, scpdata_length(ipb->ipl_info.fcp.scp_data,
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ipb->ipl_info.fcp.scp_data_len));
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if (!count)
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goto out;
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has_lowercase = 0;
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for (i = 0; i < count; i++) {
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if (!isascii(ipb->ipl_info.fcp.scp_data[i])) {
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count = 0;
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goto out;
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}
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if (!has_lowercase && islower(ipb->ipl_info.fcp.scp_data[i]))
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has_lowercase = 1;
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}
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if (has_lowercase)
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memcpy(dest, ipb->ipl_info.fcp.scp_data, count);
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else
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for (i = 0; i < count; i++)
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dest[i] = tolower(ipb->ipl_info.fcp.scp_data[i]);
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out:
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dest[count] = '\0';
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return count;
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}
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size_t append_ipl_scpdata(char *dest, size_t len)
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{
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size_t rc;
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rc = 0;
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if (ipl_block.hdr.pbt == DIAG308_IPL_TYPE_FCP)
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rc = reipl_append_ascii_scpdata(dest, len, &ipl_block);
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else
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dest[0] = 0;
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return rc;
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}
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static struct kobj_attribute sys_ipl_vm_parm_attr =
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__ATTR(parm, S_IRUGO, ipl_vm_parm_show, NULL);
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static ssize_t sys_ipl_device_show(struct kobject *kobj,
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struct kobj_attribute *attr, char *page)
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{
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struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START;
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switch (ipl_info.type) {
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case IPL_TYPE_CCW:
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return sprintf(page, "0.0.%04x\n", ipl_devno);
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case IPL_TYPE_FCP:
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case IPL_TYPE_FCP_DUMP:
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return sprintf(page, "0.0.%04x\n", ipl->ipl_info.fcp.devno);
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default:
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return 0;
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}
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}
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static struct kobj_attribute sys_ipl_device_attr =
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__ATTR(device, S_IRUGO, sys_ipl_device_show, NULL);
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static ssize_t ipl_parameter_read(struct file *filp, struct kobject *kobj,
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struct bin_attribute *attr, char *buf,
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loff_t off, size_t count)
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{
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return memory_read_from_buffer(buf, count, &off, IPL_PARMBLOCK_START,
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IPL_PARMBLOCK_SIZE);
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}
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static struct bin_attribute ipl_parameter_attr = {
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.attr = {
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.name = "binary_parameter",
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.mode = S_IRUGO,
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},
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.size = PAGE_SIZE,
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.read = &ipl_parameter_read,
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};
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static ssize_t ipl_scp_data_read(struct file *filp, struct kobject *kobj,
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struct bin_attribute *attr, char *buf,
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loff_t off, size_t count)
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{
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unsigned int size = IPL_PARMBLOCK_START->ipl_info.fcp.scp_data_len;
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void *scp_data = &IPL_PARMBLOCK_START->ipl_info.fcp.scp_data;
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return memory_read_from_buffer(buf, count, &off, scp_data, size);
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}
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static struct bin_attribute ipl_scp_data_attr = {
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.attr = {
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.name = "scp_data",
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.mode = S_IRUGO,
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},
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.size = PAGE_SIZE,
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.read = ipl_scp_data_read,
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};
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/* FCP ipl device attributes */
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DEFINE_IPL_ATTR_RO(ipl_fcp, wwpn, "0x%016llx\n", (unsigned long long)
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IPL_PARMBLOCK_START->ipl_info.fcp.wwpn);
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DEFINE_IPL_ATTR_RO(ipl_fcp, lun, "0x%016llx\n", (unsigned long long)
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IPL_PARMBLOCK_START->ipl_info.fcp.lun);
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DEFINE_IPL_ATTR_RO(ipl_fcp, bootprog, "%lld\n", (unsigned long long)
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IPL_PARMBLOCK_START->ipl_info.fcp.bootprog);
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DEFINE_IPL_ATTR_RO(ipl_fcp, br_lba, "%lld\n", (unsigned long long)
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IPL_PARMBLOCK_START->ipl_info.fcp.br_lba);
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static struct attribute *ipl_fcp_attrs[] = {
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&sys_ipl_type_attr.attr,
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&sys_ipl_device_attr.attr,
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&sys_ipl_fcp_wwpn_attr.attr,
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&sys_ipl_fcp_lun_attr.attr,
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&sys_ipl_fcp_bootprog_attr.attr,
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&sys_ipl_fcp_br_lba_attr.attr,
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NULL,
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};
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static struct attribute_group ipl_fcp_attr_group = {
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.attrs = ipl_fcp_attrs,
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};
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/* CCW ipl device attributes */
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static ssize_t ipl_ccw_loadparm_show(struct kobject *kobj,
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struct kobj_attribute *attr, char *page)
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{
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char loadparm[LOADPARM_LEN + 1] = {};
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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;
|
|
|
|
/* Store status at absolute zero */
|
|
store_status();
|
|
|
|
do_reset_calls();
|
|
if (func)
|
|
func(data);
|
|
}
|