ipl.c 44.2 KB
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/*
 *  arch/s390/kernel/ipl.c
 *    ipl/reipl/dump support for Linux on s390.
 *
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 *    Copyright IBM Corp. 2005,2007
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 *    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>
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#include <linux/ctype.h>
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#include <linux/fs.h>
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#include <asm/ipl.h>
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#include <asm/smp.h>
#include <asm/setup.h>
#include <asm/cpcmd.h>
#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/setup.h>
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#define IPL_PARM_BLOCK_VERSION 0
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#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"
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#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
 */
#define ON_PANIC_STR		"on_panic"
#define ON_HALT_STR		"on_halt"
#define ON_POFF_STR		"on_poff"
#define ON_REIPL_STR		"on_reboot"

struct shutdown_action;
struct shutdown_trigger {
	char *name;
	struct shutdown_action *action;
};

/*
 * Five 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"

struct shutdown_action {
	char *name;
	void (*fn) (struct shutdown_trigger *trigger);
	int (*init) (void);
};

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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;
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	case IPL_TYPE_FCP_DUMP:
		return IPL_FCP_DUMP_STR;
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	case IPL_TYPE_NSS:
		return IPL_NSS_STR;
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	case IPL_TYPE_UNKNOWN:
	default:
		return IPL_UNKNOWN_STR;
	}
}

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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;

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enum ipl_method {
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	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,
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	REIPL_METHOD_NSS_DIAG,
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	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,
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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;
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 int dump_capabilities = DUMP_TYPE_NONE;
static enum dump_type dump_type = DUMP_TYPE_NONE;
static enum dump_method dump_method = DUMP_METHOD_NONE;
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static struct ipl_parameter_block *dump_block_fcp;
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(
		"	diag	%0,%2,0x308\n"
		"0:\n"
		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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EXPORT_SYMBOL_GPL(diag308);
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/* SYSFS */

#define DEFINE_IPL_ATTR_RO(_prefix, _name, _format, _value)		\
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static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj,	\
		struct kobj_attribute *attr,				\
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		char *page)						\
{									\
	return sprintf(page, _format, _value);				\
}									\
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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);

#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,	\
		struct kobj_attribute *attr,				\
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		char *page)						\
{									\
	return sprintf(page, _fmt_out,					\
			(unsigned long long) _value);			\
}									\
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static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj,	\
		struct kobj_attribute *attr,				\
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		const char *buf, size_t len)				\
{									\
	unsigned long long value;					\
	if (sscanf(buf, _fmt_in, &value) != 1)				\
		return -EINVAL;						\
	_value = value;							\
	return len;							\
}									\
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static struct kobj_attribute sys_##_prefix##_##_name##_attr =		\
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	__ATTR(_name,(S_IRUGO | S_IWUSR),				\
			sys_##_prefix##_##_name##_show,			\
			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,	\
		struct kobj_attribute *attr,				\
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		char *page)						\
{									\
	return sprintf(page, _fmt_out, _value);				\
}									\
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static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj,	\
		struct kobj_attribute *attr,				\
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		const char *buf, size_t len)				\
{									\
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	strncpy(_value, buf, sizeof(_value) - 1);			\
	strstrip(_value);						\
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	return len;							\
}									\
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static struct kobj_attribute sys_##_prefix##_##_name##_attr =		\
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	__ATTR(_name,(S_IRUGO | S_IWUSR),				\
			sys_##_prefix##_##_name##_show,			\
			sys_##_prefix##_##_name##_store);

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static void make_attrs_ro(struct attribute **attrs)
{
	while (*attrs) {
		(*attrs)->mode = S_IRUGO;
		attrs++;
	}
}

/*
 * ipl section
 */

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static __init enum ipl_type get_ipl_type(void)
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{
	struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START;

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	if (ipl_flags & IPL_NSS_VALID)
		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;
	if (ipl->hdr.version > IPL_MAX_SUPPORTED_VERSION)
		return IPL_TYPE_UNKNOWN;
	if (ipl->hdr.pbt != DIAG308_IPL_TYPE_FCP)
		return IPL_TYPE_UNKNOWN;
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	if (ipl->ipl_info.fcp.opt == DIAG308_IPL_OPT_DUMP)
		return IPL_TYPE_FCP_DUMP;
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	return IPL_TYPE_FCP;
}

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struct ipl_info ipl_info;
EXPORT_SYMBOL_GPL(ipl_info);

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static ssize_t ipl_type_show(struct kobject *kobj, struct kobj_attribute *attr,
			     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 */
static void reipl_get_ascii_vmparm(char *dest,
				   const struct ipl_parameter_block *ipb)
{
	int i;
	int len = 0;
	char has_lowercase = 0;

	if ((ipb->ipl_info.ccw.vm_flags & DIAG308_VM_FLAGS_VP_VALID) &&
	    (ipb->ipl_info.ccw.vm_parm_len > 0)) {

		len = 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;
}

void get_ipl_vmparm(char *dest)
{
	if (diag308_set_works && (ipl_block.hdr.pbt == DIAG308_IPL_TYPE_CCW))
		reipl_get_ascii_vmparm(dest, &ipl_block);
	else
		dest[0] = 0;
}

static ssize_t ipl_vm_parm_show(struct kobject *kobj,
				struct kobj_attribute *attr, char *page)
{
	char parm[DIAG308_VMPARM_SIZE + 1] = {};

	get_ipl_vmparm(parm);
	return sprintf(page, "%s\n", parm);
}

static struct kobj_attribute sys_ipl_vm_parm_attr =
	__ATTR(parm, S_IRUGO, ipl_vm_parm_show, NULL);

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static ssize_t sys_ipl_device_show(struct kobject *kobj,
				   struct kobj_attribute *attr, char *page)
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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:
		return sprintf(page, "0.0.%04x\n", ipl_devno);
	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);
	default:
		return 0;
	}
}

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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 kobject *kobj, struct bin_attribute *attr,
				  char *buf, 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,
					IPL_PARMBLOCK_SIZE);
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}

static struct bin_attribute ipl_parameter_attr = {
	.attr = {
		.name = "binary_parameter",
		.mode = S_IRUGO,
	},
	.size = PAGE_SIZE,
	.read = &ipl_parameter_read,
};

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static ssize_t ipl_scp_data_read(struct kobject *kobj, struct bin_attribute *attr,
				 char *buf, loff_t off, size_t count)
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{
	unsigned int size = IPL_PARMBLOCK_START->ipl_info.fcp.scp_data_len;
	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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}

static struct bin_attribute ipl_scp_data_attr = {
	.attr = {
		.name = "scp_data",
		.mode = S_IRUGO,
	},
	.size = PAGE_SIZE,
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	.read = ipl_scp_data_read,
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};

/* 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 */

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static ssize_t ipl_ccw_loadparm_show(struct kobject *kobj,
				     struct kobj_attribute *attr, char *page)
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{
	char loadparm[LOADPARM_LEN + 1] = {};

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	if (!sclp_ipl_info.is_valid)
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		return sprintf(page, "#unknown#\n");
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	memcpy(loadparm, &sclp_ipl_info.loadparm, LOADPARM_LEN);
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	EBCASC(loadparm, LOADPARM_LEN);
	strstrip(loadparm);
	return sprintf(page, "%s\n", loadparm);
}

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static struct kobj_attribute sys_ipl_ccw_loadparm_attr =
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	__ATTR(loadparm, 0444, ipl_ccw_loadparm_show, NULL);

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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[] = {
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	&sys_ipl_type_attr.attr,
	&sys_ipl_device_attr.attr,
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	&sys_ipl_ccw_loadparm_attr.attr,
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	NULL,
};

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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
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};

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/* 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,
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	&sys_ipl_ccw_loadparm_attr.attr,
	&sys_ipl_vm_parm_attr.attr,
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	NULL,
};

static struct attribute_group ipl_nss_attr_group = {
	.attrs = ipl_nss_attrs,
};

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/* 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,
};

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static struct kset *ipl_kset;
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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(struct shutdown_trigger *trigger)
{
	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);
}

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static int __init ipl_init(void)
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{
	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:
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		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);
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		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;
}

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static struct shutdown_action __refdata ipl_action = {
	.name	= SHUTDOWN_ACTION_IPL_STR,
	.fn	= ipl_run,
	.init	= ipl_init,
};
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/*
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 * reipl shutdown action: Reboot Linux on shutdown.
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 */

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/* 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, 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);

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/* FCP reipl device attributes */

DEFINE_IPL_ATTR_RW(reipl_fcp, wwpn, "0x%016llx\n", "%016llx\n",
		   reipl_block_fcp->ipl_info.fcp.wwpn);
DEFINE_IPL_ATTR_RW(reipl_fcp, lun, "0x%016llx\n", "%016llx\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 = {
	.name  = IPL_FCP_STR,
	.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);

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static void reipl_get_ascii_loadparm(char *loadparm,
				     struct ipl_parameter_block *ibp)
657
{
658
	memcpy(loadparm, ibp->ipl_info.ccw.load_parm, LOADPARM_LEN);
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	EBCASC(loadparm, LOADPARM_LEN);
	loadparm[LOADPARM_LEN] = 0;
	strstrip(loadparm);
}

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static ssize_t reipl_generic_loadparm_show(struct ipl_parameter_block *ipb,
					   char *page)
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{
	char buf[LOADPARM_LEN + 1];

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	reipl_get_ascii_loadparm(buf, ipb);
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	return sprintf(page, "%s\n", buf);
}

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static ssize_t reipl_generic_loadparm_store(struct ipl_parameter_block *ipb,
					    const char *buf, size_t len)
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{
	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 */
693
	memset(ipb->ipl_info.ccw.load_parm, ' ', LOADPARM_LEN);
694
	/* copy and convert to ebcdic */
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	memcpy(ipb->ipl_info.ccw.load_parm, buf, lp_len);
	ASCEBC(ipb->ipl_info.ccw.load_parm, LOADPARM_LEN);
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	return len;
}

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/* 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);
}

728
static struct kobj_attribute sys_reipl_ccw_loadparm_attr =
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	__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,
};
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739
static struct attribute *reipl_ccw_attrs_lpar[] = {
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	&sys_reipl_ccw_device_attr.attr,
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	&sys_reipl_ccw_loadparm_attr.attr,
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	NULL,
};

745
static struct attribute_group reipl_ccw_attr_group_vm = {
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	.name  = IPL_CCW_STR,
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	.attrs = reipl_ccw_attrs_vm,
};

static struct attribute_group reipl_ccw_attr_group_lpar = {
	.name  = IPL_CCW_STR,
	.attrs = reipl_ccw_attrs_lpar,
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};

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/* NSS reipl device attributes */
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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--;
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	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);
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static struct attribute *reipl_nss_attrs[] = {
	&sys_reipl_nss_name_attr.attr,
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	&sys_reipl_nss_loadparm_attr.attr,
	&sys_reipl_nss_vmparm_attr.attr,
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	NULL,
};

static struct attribute_group reipl_nss_attr_group = {
	.name  = IPL_NSS_STR,
	.attrs = reipl_nss_attrs,
};

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/* reipl type */

static int reipl_set_type(enum ipl_type type)
{
	if (!(reipl_capabilities & type))
		return -EINVAL;

	switch(type) {
	case IPL_TYPE_CCW:
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		if (diag308_set_works)
			reipl_method = REIPL_METHOD_CCW_DIAG;
		else if (MACHINE_IS_VM)
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			reipl_method = REIPL_METHOD_CCW_VM;
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		else
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			reipl_method = REIPL_METHOD_CCW_CIO;
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		break;
	case IPL_TYPE_FCP:
		if (diag308_set_works)
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			reipl_method = REIPL_METHOD_FCP_RW_DIAG;
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		else if (MACHINE_IS_VM)
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			reipl_method = REIPL_METHOD_FCP_RO_VM;
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		else
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			reipl_method = REIPL_METHOD_FCP_RO_DIAG;
		break;
	case IPL_TYPE_FCP_DUMP:
		reipl_method = REIPL_METHOD_FCP_DUMP;
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		break;
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	case IPL_TYPE_NSS:
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		if (diag308_set_works)
			reipl_method = REIPL_METHOD_NSS_DIAG;
		else
			reipl_method = REIPL_METHOD_NSS;
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		break;
	case IPL_TYPE_UNKNOWN:
		reipl_method = REIPL_METHOD_DEFAULT;
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		break;
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	default:
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		BUG();
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	}
	reipl_type = type;
	return 0;
}

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static ssize_t reipl_type_show(struct kobject *kobj,
			       struct kobj_attribute *attr, char *page)
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{
	return sprintf(page, "%s\n", ipl_type_str(reipl_type));
}

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static ssize_t reipl_type_store(struct kobject *kobj,
				struct kobj_attribute *attr,
				const char *buf, size_t len)
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{
	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);
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	else if (strncmp(buf, IPL_NSS_STR, strlen(IPL_NSS_STR)) == 0)
		rc = reipl_set_type(IPL_TYPE_NSS);
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	return (rc != 0) ? rc : len;
}

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static struct kobj_attribute reipl_type_attr =
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	__ATTR(reipl_type, 0644, reipl_type_show, reipl_type_store);
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890
static struct kset *reipl_kset;
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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, 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);
}

920
static void reipl_run(struct shutdown_trigger *trigger)
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{
	struct ccw_dev_id devid;
923
	static char buf[128];
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	switch (reipl_method) {
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	case REIPL_METHOD_CCW_CIO:
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		devid.devno = reipl_block_ccw->ipl_info.ccw.devno;
		devid.ssid  = 0;
		reipl_ccw_dev(&devid);
		break;
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	case REIPL_METHOD_CCW_VM:
932
		get_ipl_string(buf, reipl_block_ccw, REIPL_METHOD_CCW_VM);
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		__cpcmd(buf, NULL, 0, NULL);
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		break;
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	case REIPL_METHOD_CCW_DIAG:
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		diag308(DIAG308_SET, reipl_block_ccw);
		diag308(DIAG308_IPL, NULL);
		break;
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	case REIPL_METHOD_FCP_RW_DIAG:
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		diag308(DIAG308_SET, reipl_block_fcp);
		diag308(DIAG308_IPL, NULL);
		break;
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	case REIPL_METHOD_FCP_RO_DIAG:
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		diag308(DIAG308_IPL, NULL);
		break;
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	case REIPL_METHOD_FCP_RO_VM:
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		__cpcmd("IPL", NULL, 0, NULL);
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		break;
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	case REIPL_METHOD_NSS_DIAG:
		diag308(DIAG308_SET, reipl_block_nss);
		diag308(DIAG308_IPL, NULL);
		break;
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	case REIPL_METHOD_NSS:
954
		get_ipl_string(buf, reipl_block_nss, REIPL_METHOD_NSS);
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		__cpcmd(buf, NULL, 0, NULL);
		break;
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	case REIPL_METHOD_DEFAULT:
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		if (MACHINE_IS_VM)
959
			__cpcmd("IPL", NULL, 0, NULL);
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		diag308(DIAG308_IPL, NULL);
		break;
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	case REIPL_METHOD_FCP_DUMP:
	default:
		break;
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	}
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	disabled_wait((unsigned long) __builtin_return_address(0));
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}

969
static void reipl_block_ccw_init(struct ipl_parameter_block *ipb)
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{
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	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;
}
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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);
	}
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}

1001
static int __init reipl_nss_init(void)
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{
	int rc;

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	if (!MACHINE_IS_VM)
		return 0;
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	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;

1015
	rc = sysfs_create_group(&reipl_kset->kobj, &reipl_nss_attr_group);
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	if (rc)
		return rc;
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	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);
	}

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	reipl_capabilities |= IPL_TYPE_NSS;
	return 0;
}

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static int __init reipl_ccw_init(void)
{
	int rc;

	reipl_block_ccw = (void *) get_zeroed_page(GFP_KERNEL);
	if (!reipl_block_ccw)
		return -ENOMEM;
1043 1044 1045 1046 1047 1048 1049 1050 1051 1052 1053

	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);
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	}
1055 1056 1057 1058 1059
	if (rc)
		return rc;

	reipl_block_ccw_init(reipl_block_ccw);
	if (ipl_info.type == IPL_TYPE_CCW) {
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		reipl_block_ccw->ipl_info.ccw.devno = ipl_devno;
1061 1062 1063
		reipl_block_ccw_fill_parms(reipl_block_ccw);
	}

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	reipl_capabilities |= IPL_TYPE_CCW;
	return 0;
}

static int __init reipl_fcp_init(void)
{
	int rc;

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	if ((!diag308_set_works) && (ipl_info.type != IPL_TYPE_FCP))
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		return 0;
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	if ((!diag308_set_works) && (ipl_info.type == IPL_TYPE_FCP))
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		make_attrs_ro(reipl_fcp_attrs);

	reipl_block_fcp = (void *) get_zeroed_page(GFP_KERNEL);
	if (!reipl_block_fcp)
		return -ENOMEM;
1080
	rc = sysfs_create_group(&reipl_kset->kobj, &reipl_fcp_attr_group);
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	if (rc) {
		free_page((unsigned long)reipl_block_fcp);
		return rc;
	}
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	if (ipl_info.type == IPL_TYPE_FCP) {
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		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;
1090
		reipl_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN;
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		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;
}

1098
static int __init reipl_init(void)
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{
	int rc;

1102
	reipl_kset = kset_create_and_add("reipl", NULL, firmware_kobj);
1103 1104 1105
	if (!reipl_kset)
		return -ENOMEM;
	rc = sysfs_create_file(&reipl_kset->kobj, &reipl_type_attr.attr);
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	if (rc) {
1107
		kset_unregister(reipl_kset);
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		return rc;
	}
	rc = reipl_ccw_init();
	if (rc)
		return rc;
	rc = reipl_fcp_init();
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	if (rc)
		return rc;
	rc = reipl_nss_init();
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	if (rc)
		return rc;
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	rc = reipl_set_type(ipl_info.type);
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	if (rc)
		return rc;
	return 0;
}

1125 1126 1127 1128 1129
static struct shutdown_action __refdata reipl_action = {
	.name	= SHUTDOWN_ACTION_REIPL_STR,
	.fn	= reipl_run,
	.init	= reipl_init,
};
1130 1131 1132 1133 1134 1135 1136 1137 1138 1139 1140 1141 1142 1143 1144 1145 1146 1147 1148 1149 1150 1151 1152 1153 1154 1155 1156 1157 1158 1159 1160 1161 1162 1163 1164 1165 1166 1167 1168 1169 1170 1171 1172 1173 1174 1175 1176 1177 1178 1179 1180 1181 1182 1183 1184

/*
 * dump shutdown action: Dump Linux on shutdown.
 */

/* FCP dump device attributes */

DEFINE_IPL_ATTR_RW(dump_fcp, wwpn, "0x%016llx\n", "%016llx\n",
		   dump_block_fcp->ipl_info.fcp.wwpn);
DEFINE_IPL_ATTR_RW(dump_fcp, lun, "0x%016llx\n", "%016llx\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:
1185 1186 1187
		if (diag308_set_works)
			dump_method = DUMP_METHOD_CCW_DIAG;
		else if (MACHINE_IS_VM)
1188 1189 1190 1191 1192 1193 1194 1195 1196 1197 1198 1199 1200 1201 1202 1203 1204 1205 1206 1207 1208 1209 1210 1211 1212 1213 1214 1215 1216 1217 1218 1219 1220 1221 1222 1223 1224 1225 1226 1227 1228 1229 1230 1231 1232 1233 1234 1235 1236 1237 1238 1239 1240 1241 1242 1243 1244 1245 1246 1247 1248 1249 1250 1251 1252 1253 1254 1255 1256 1257 1258 1259 1260 1261
			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 dump_run(struct shutdown_trigger *trigger)
{
	struct ccw_dev_id devid;
	static char buf[100];

	switch (dump_method) {
	case DUMP_METHOD_CCW_CIO:
		smp_send_stop();
		devid.devno = dump_block_ccw->ipl_info.ccw.devno;
		devid.ssid  = 0;
		reipl_ccw_dev(&devid);
		break;
	case DUMP_METHOD_CCW_VM:
		smp_send_stop();
		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(DIAG308_SET, dump_block_ccw);
		diag308(DIAG308_DUMP, NULL);
		break;
	case DUMP_METHOD_FCP_DIAG:
		diag308(DIAG308_SET, dump_block_fcp);
		diag308(DIAG308_DUMP, NULL);
		break;
	case DUMP_METHOD_NONE:
	default:
		return;
	}
	printk(KERN_EMERG "Dump failed!\n");
}

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static int __init dump_ccw_init(void)
{
	int rc;

	dump_block_ccw = (void *) get_zeroed_page(GFP_KERNEL);
	if (!dump_block_ccw)
		return -ENOMEM;
1269
	rc = sysfs_create_group(&dump_kset->kobj, &dump_ccw_attr_group);
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	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;
1276
	dump_block_ccw->hdr.blk0_len = IPL_PARM_BLK0_CCW_LEN;
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	dump_block_ccw->hdr.pbt = DIAG308_IPL_TYPE_CCW;
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	dump_capabilities |= DUMP_TYPE_CCW;
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	return 0;
}

static int __init dump_fcp_init(void)
{
	int rc;

1286
	if (!sclp_ipl_info.has_dump)
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		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;
1293
	rc = sysfs_create_group(&dump_kset->kobj, &dump_fcp_attr_group);
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	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;
1300
	dump_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN;
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	dump_block_fcp->hdr.pbt = DIAG308_IPL_TYPE_FCP;
	dump_block_fcp->ipl_info.fcp.opt = DIAG308_IPL_OPT_DUMP;
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	dump_capabilities |= DUMP_TYPE_FCP;
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	return 0;
}

1307
static int __init dump_init(void)
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{
	int rc;

1311
	dump_kset = kset_create_and_add("dump", NULL, firmware_kobj);
1312 1313
	if (!dump_kset)
		return -ENOMEM;
1314
	rc = sysfs_create_file(&dump_kset->kobj, &dump_type_attr.attr);
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	if (rc) {
1316
		kset_unregister(dump_kset);
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		return rc;
	}
	rc = dump_ccw_init();
	if (rc)
		return rc;
	rc = dump_fcp_init();
	if (rc)
		return rc;
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	dump_set_type(DUMP_TYPE_NONE);
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	return 0;
}

1329 1330 1331 1332 1333
static struct shutdown_action __refdata dump_action = {
	.name	= SHUTDOWN_ACTION_DUMP_STR,
	.fn	= dump_run,
	.init	= dump_init,
};
1334 1335 1336 1337 1338 1339 1340 1341 1342 1343 1344 1345 1346 1347 1348 1349 1350 1351 1352 1353 1354 1355 1356 1357 1358 1359 1360 1361 1362 1363

/*
 * 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];

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);

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,
	NULL,
};

static struct attribute_group vmcmd_attr_group = {
	.attrs = vmcmd_attrs,
};

static struct kset *vmcmd_kset;

static void vmcmd_run(struct shutdown_trigger *trigger)
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{
1365 1366 1367 1368 1369 1370 1371 1372 1373 1374 1375 1376 1377 1378 1379 1380 1381 1382 1383 1384 1385 1386 1387 1388 1389 1390 1391 1392 1393 1394 1395 1396 1397 1398 1399 1400 1401 1402 1403 1404 1405 1406 1407 1408 1409
	char *cmd, *next_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
		return;

	if (strlen(cmd) == 0)
		return;
	do {
		next_cmd = strchr(cmd, '\n');
		if (next_cmd) {
			next_cmd[0] = 0;
			next_cmd += 1;
		}
		__cpcmd(cmd, NULL, 0, NULL);
		cmd = next_cmd;
	} while (cmd != NULL);
}

static int vmcmd_init(void)
{
	if (!MACHINE_IS_VM)
		return -ENOTSUPP;
	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)
{
1410 1411 1412 1413 1414 1415
	if (strcmp(trigger->name, ON_PANIC_STR) == 0)
		disabled_wait((unsigned long) __builtin_return_address(0));
	else {
		signal_processor(smp_processor_id(), sigp_stop);
		for (;;);
	}
1416 1417 1418 1419 1420 1421 1422 1423 1424 1425 1426 1427 1428 1429 1430 1431 1432 1433 1434 1435 1436 1437 1438 1439 1440 1441 1442 1443 1444 1445 1446 1447 1448 1449 1450 1451 1452 1453 1454 1455 1456 1457 1458 1459 1460 1461 1462 1463 1464 1465 1466 1467 1468 1469 1470 1471 1472 1473 1474 1475 1476 1477 1478 1479 1480 1481 1482 1483 1484 1485 1486 1487 1488 1489 1490 1491 1492 1493 1494 1495 1496 1497 1498 1499 1500 1501 1502 1503 1504 1505 1506 1507 1508 1509 1510 1511 1512 1513 1514 1515 1516 1517 1518 1519 1520 1521 1522
}

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_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 (!shutdown_actions_list[i])
			continue;
		if (strncmp(buf, shutdown_actions_list[i]->name,
			    strlen(shutdown_actions_list[i]->name)) == 0) {
			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)
{
	on_panic_trigger.action->fn(&on_panic_trigger);
	stop_run(&on_panic_trigger);
}

/* 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);
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1524 1525 1526 1527 1528 1529 1530 1531 1532 1533 1534 1535 1536 1537 1538 1539 1540 1541 1542 1543 1544 1545 1546 1547 1548 1549 1550 1551 1552 1553 1554 1555 1556 1557 1558 1559 1560 1561 1562 1563

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)
{
1564
	shutdown_actions_kset = kset_create_and_add("shutdown_actions", NULL,
1565
						    firmware_kobj);
1566
	if (!shutdown_actions_kset)
1567 1568 1569 1570 1571 1572 1573 1574 1575 1576 1577 1578 1579 1580 1581 1582 1583 1584 1585 1586 1587 1588 1589 1590 1591 1592 1593 1594
		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;

	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;
		if (shutdown_actions_list[i]->init())
			shutdown_actions_list[i] = NULL;
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	}
}

static int __init s390_ipl_init(void)
{
1600
	sclp_get_ipl_info(&sclp_ipl_info);
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	shutdown_actions_init();
	shutdown_triggers_init();
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	return 0;
}

__initcall(s390_ipl_init);
1607

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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 = 0,
};

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:
	default:
		/* We have no info to copy */
		break;
	}
	atomic_notifier_chain_register(&panic_notifier_list, &on_panic_nb);
}

1706 1707
void __init ipl_update_parameters(void)
{
1708 1709 1710 1711
	int rc;

	rc = diag308(DIAG308_STORE, &ipl_block);
	if ((rc == DIAG308_RC_OK) || (rc == DIAG308_RC_NOCONFIG))
1712 1713 1714
		diag308_set_works = 1;
}

1715 1716 1717 1718 1719 1720 1721 1722 1723 1724 1725 1726 1727 1728 1729 1730 1731 1732 1733 1734 1735
void __init ipl_save_parameters(void)
{
	struct cio_iplinfo iplinfo;
	unsigned int *ipl_ptr;
	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;
	ipl_ptr = (unsigned int *)__LC_IPL_PARMBLOCK_PTR;
	src = (void *)(unsigned long)*ipl_ptr;
	dst = (void *)IPL_PARMBLOCK_ORIGIN;
	memmove(dst, src, PAGE_SIZE);
	*ipl_ptr = IPL_PARMBLOCK_ORIGIN;
}

1736 1737 1738 1739 1740 1741 1742 1743 1744 1745 1746 1747 1748 1749 1750 1751 1752 1753 1754 1755 1756 1757 1758 1759 1760 1761 1762
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;

	list_for_each_entry(reset, &rcall, list)
		reset->fn();
}

1763
u32 dump_prefix_page;
1764 1765 1766 1767 1768 1769

void s390_reset_system(void)
{
	struct _lowcore *lc;

	lc = (struct _lowcore *)(unsigned long) store_prefix();
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Michael Holzheu 已提交
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	/* Stack for interrupt/machine check handler */
1772 1773
	lc->panic_stack = S390_lowcore.panic_stack;

1774
	/* Save prefix page address for dump case */
1775
	dump_prefix_page = (u32)(unsigned long) lc;
1776

1777 1778 1779 1780 1781 1782 1783
	/* Disable prefixing */
	set_prefix(0);

	/* Disable lowcore protection */
	__ctl_clear_bit(0,28);

	/* Set new machine check handler */
G
Gerald Schaefer 已提交
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	S390_lowcore.mcck_new_psw.mask = psw_kernel_bits & ~PSW_MASK_MCHECK;
1785
	S390_lowcore.mcck_new_psw.addr =
1786
		PSW_ADDR_AMODE | (unsigned long) s390_base_mcck_handler;
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Michael Holzheu 已提交
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	/* Set new program check handler */
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Gerald Schaefer 已提交
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	S390_lowcore.program_new_psw.mask = psw_kernel_bits & ~PSW_MASK_MCHECK;
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Michael Holzheu 已提交
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	S390_lowcore.program_new_psw.addr =
1791
		PSW_ADDR_AMODE | (unsigned long) s390_base_pgm_handler;
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Michael Holzheu 已提交
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1793 1794
	do_reset_calls();
}
1795