[S390] ipl/dump on panic.

It is now possible to specify a ccw/fcp dump device which is used to
automatically create a system dump in case of a kernel panic. The dump
device can be configured under /sys/firmware/dump.
In addition it is now possible to specify a ccw/fcp device which is used
for the next reboot of Linux. The reipl device can be configured under
/sys/firmware/reipl.

Signed-off-by: Michael Holzheu <holzheu@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

1 files changed, 942 insertions, 0 deletions

diff --git a/arch/s390/kernel/ipl.c b/arch/s390/kernel/ipl.c
new file mode 100644
index 000000000000..105ee15a2b31
--- /dev/null
+++ b/arch/s390/kernel/ipl.c
@@ -0,0 +1,942 @@
+/*
+ *  arch/s390/kernel/ipl.c
+ *    ipl/reipl/dump support for Linux on s390.
+ *
+ *    Copyright (C) IBM Corp. 2005,2006
+ *    Author(s): Michael Holzheu <holzheu@de.ibm.com>
+ *		 Heiko Carstens <heiko.carstens@de.ibm.com>
+ *		 Volker Sameske <sameske@de.ibm.com>
+ */
+
+#include <linux/types.h>
+#include <linux/module.h>
+#include <linux/device.h>
+#include <linux/delay.h>
+#include <linux/reboot.h>
+#include <asm/smp.h>
+#include <asm/setup.h>
+#include <asm/cpcmd.h>
+#include <asm/cio.h>
+
+#define IPL_PARM_BLOCK_VERSION 0
+
+enum ipl_type {
+	IPL_TYPE_NONE	 = 1,
+	IPL_TYPE_UNKNOWN = 2,
+	IPL_TYPE_CCW	 = 4,
+	IPL_TYPE_FCP	 = 8,
+};
+
+#define IPL_NONE_STR	 "none"
+#define IPL_UNKNOWN_STR  "unknown"
+#define IPL_CCW_STR	 "ccw"
+#define IPL_FCP_STR	 "fcp"
+
+static char *ipl_type_str(enum ipl_type type)
+{
+	switch (type) {
+	case IPL_TYPE_NONE:
+		return IPL_NONE_STR;
+	case IPL_TYPE_CCW:
+		return IPL_CCW_STR;
+	case IPL_TYPE_FCP:
+		return IPL_FCP_STR;
+	case IPL_TYPE_UNKNOWN:
+	default:
+		return IPL_UNKNOWN_STR;
+	}
+}
+
+enum ipl_method {
+	IPL_METHOD_NONE,
+	IPL_METHOD_CCW_CIO,
+	IPL_METHOD_CCW_DIAG,
+	IPL_METHOD_CCW_VM,
+	IPL_METHOD_FCP_RO_DIAG,
+	IPL_METHOD_FCP_RW_DIAG,
+	IPL_METHOD_FCP_RO_VM,
+};
+
+enum shutdown_action {
+	SHUTDOWN_REIPL,
+	SHUTDOWN_DUMP,
+	SHUTDOWN_STOP,
+};
+
+#define SHUTDOWN_REIPL_STR "reipl"
+#define SHUTDOWN_DUMP_STR  "dump"
+#define SHUTDOWN_STOP_STR  "stop"
+
+static char *shutdown_action_str(enum shutdown_action action)
+{
+	switch (action) {
+	case SHUTDOWN_REIPL:
+		return SHUTDOWN_REIPL_STR;
+	case SHUTDOWN_DUMP:
+		return SHUTDOWN_DUMP_STR;
+	case SHUTDOWN_STOP:
+		return SHUTDOWN_STOP_STR;
+	default:
+		BUG();
+	}
+}
+
+enum diag308_subcode  {
+	DIAG308_IPL   = 3,
+	DIAG308_DUMP  = 4,
+	DIAG308_SET   = 5,
+	DIAG308_STORE = 6,
+};
+
+enum diag308_ipl_type {
+	DIAG308_IPL_TYPE_FCP = 0,
+	DIAG308_IPL_TYPE_CCW = 2,
+};
+
+enum diag308_opt {
+	DIAG308_IPL_OPT_IPL  = 0x10,
+	DIAG308_IPL_OPT_DUMP = 0x20,
+};
+
+enum diag308_rc {
+	DIAG308_RC_OK = 1,
+};
+
+static int diag308_set_works = 0;
+
+static int reipl_capabilities = IPL_TYPE_UNKNOWN;
+static enum ipl_type reipl_type = IPL_TYPE_UNKNOWN;
+static enum ipl_method reipl_method = IPL_METHOD_NONE;
+static struct ipl_parameter_block *reipl_block_fcp;
+static struct ipl_parameter_block *reipl_block_ccw;
+
+static int dump_capabilities = IPL_TYPE_NONE;
+static enum ipl_type dump_type = IPL_TYPE_NONE;
+static enum ipl_method dump_method = IPL_METHOD_NONE;
+static struct ipl_parameter_block *dump_block_fcp;
+static struct ipl_parameter_block *dump_block_ccw;
+
+static enum shutdown_action on_panic_action = SHUTDOWN_STOP;
+
+static int diag308(unsigned long subcode, void *addr)
+{
+	register unsigned long _addr asm("0") = (unsigned long)addr;
+	register unsigned long _rc asm("1") = 0;
+
+	asm volatile (
+		"   diag %0,%2,0x308\n"
+		"0: \n"
+		".section __ex_table,\"a\"\n"
+#ifdef CONFIG_64BIT
+		"   .align 8\n"
+		"   .quad 0b, 0b\n"
+#else
+		"   .align 4\n"
+		"   .long 0b, 0b\n"
+#endif
+		".previous\n"
+		: "+d" (_addr), "+d" (_rc)
+		: "d" (subcode) : "cc", "memory" );
+
+	return _rc;
+}
+
+/* SYSFS */
+
+#define DEFINE_IPL_ATTR_RO(_prefix, _name, _format, _value)		\
+static ssize_t sys_##_prefix##_##_name##_show(struct subsystem *subsys,	\
+		char *page)						\
+{									\
+	return sprintf(page, _format, _value);				\
+}									\
+static struct subsys_attribute sys_##_prefix##_##_name##_attr =		\
+	__ATTR(_name, S_IRUGO, sys_##_prefix##_##_name##_show, NULL);
+
+#define DEFINE_IPL_ATTR_RW(_prefix, _name, _fmt_out, _fmt_in, _value)	\
+static ssize_t sys_##_prefix##_##_name##_show(struct subsystem *subsys,	\
+		char *page)						\
+{									\
+	return sprintf(page, _fmt_out,					\
+			(unsigned long long) _value);			\
+}									\
+static ssize_t sys_##_prefix##_##_name##_store(struct subsystem *subsys,\
+		const char *buf, size_t len)				\
+{									\
+	unsigned long long value;					\
+	if (sscanf(buf, _fmt_in, &value) != 1)				\
+		return -EINVAL;						\
+	_value = value;							\
+	return len;							\
+}									\
+static struct subsys_attribute sys_##_prefix##_##_name##_attr =		\
+	__ATTR(_name,(S_IRUGO | S_IWUSR),				\
+			sys_##_prefix##_##_name##_show,			\
+			sys_##_prefix##_##_name##_store);
+
+static void make_attrs_ro(struct attribute **attrs)
+{
+	while (*attrs) {
+		(*attrs)->mode = S_IRUGO;
+		attrs++;
+	}
+}
+
+/*
+ * ipl section
+ */
+
+static enum ipl_type ipl_get_type(void)
+{
+	struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START;
+
+	if (!IPL_DEVNO_VALID)
+		return IPL_TYPE_UNKNOWN;
+	if (!IPL_PARMBLOCK_VALID)
+		return IPL_TYPE_CCW;
+	if (ipl->hdr.version > IPL_MAX_SUPPORTED_VERSION)
+		return IPL_TYPE_UNKNOWN;
+	if (ipl->hdr.pbt != DIAG308_IPL_TYPE_FCP)
+		return IPL_TYPE_UNKNOWN;
+	return IPL_TYPE_FCP;
+}
+
+static ssize_t ipl_type_show(struct subsystem *subsys, char *page)
+{
+	return sprintf(page, "%s\n", ipl_type_str(ipl_get_type()));
+}
+
+static struct subsys_attribute sys_ipl_type_attr = __ATTR_RO(ipl_type);
+
+static ssize_t sys_ipl_device_show(struct subsystem *subsys, char *page)
+{
+	struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START;
+
+	switch (ipl_get_type()) {
+	case IPL_TYPE_CCW:
+		return sprintf(page, "0.0.%04x\n", ipl_devno);
+	case IPL_TYPE_FCP:
+		return sprintf(page, "0.0.%04x\n", ipl->ipl_info.fcp.devno);
+	default:
+		return 0;
+	}
+}
+
+static struct subsys_attribute sys_ipl_device_attr =
+	__ATTR(device, S_IRUGO, sys_ipl_device_show, NULL);
+
+static ssize_t ipl_parameter_read(struct kobject *kobj, char *buf, loff_t off,
+				  size_t count)
+{
+	unsigned int size = IPL_PARMBLOCK_SIZE;
+
+	if (off > size)
+		return 0;
+	if (off + count > size)
+		count = size - off;
+	memcpy(buf, (void *)IPL_PARMBLOCK_START + off, count);
+	return count;
+}
+
+static struct bin_attribute ipl_parameter_attr = {
+	.attr = {
+		.name = "binary_parameter",
+		.mode = S_IRUGO,
+		.owner = THIS_MODULE,
+	},
+	.size = PAGE_SIZE,
+	.read = &ipl_parameter_read,
+};
+
+static ssize_t ipl_scp_data_read(struct kobject *kobj, char *buf, loff_t off,
+	size_t count)
+{
+	unsigned int size = IPL_PARMBLOCK_START->ipl_info.fcp.scp_data_len;
+	void *scp_data = &IPL_PARMBLOCK_START->ipl_info.fcp.scp_data;
+
+	if (off > size)
+		return 0;
+	if (off + count > size)
+		count = size - off;
+	memcpy(buf, scp_data + off, count);
+	return count;
+}
+
+static struct bin_attribute ipl_scp_data_attr = {
+	.attr = {
+		.name = "scp_data",
+		.mode = S_IRUGO,
+		.owner = THIS_MODULE,
+	},
+	.size = PAGE_SIZE,
+	.read = &ipl_scp_data_read,
+};
+
+/* FCP ipl device attributes */
+
+DEFINE_IPL_ATTR_RO(ipl_fcp, wwpn, "0x%016llx\n", (unsigned long long)
+		   IPL_PARMBLOCK_START->ipl_info.fcp.wwpn);
+DEFINE_IPL_ATTR_RO(ipl_fcp, lun, "0x%016llx\n", (unsigned long long)
+		   IPL_PARMBLOCK_START->ipl_info.fcp.lun);
+DEFINE_IPL_ATTR_RO(ipl_fcp, bootprog, "%lld\n", (unsigned long long)
+		   IPL_PARMBLOCK_START->ipl_info.fcp.bootprog);
+DEFINE_IPL_ATTR_RO(ipl_fcp, br_lba, "%lld\n", (unsigned long long)
+		   IPL_PARMBLOCK_START->ipl_info.fcp.br_lba);
+
+static struct attribute *ipl_fcp_attrs[] = {
+	&sys_ipl_type_attr.attr,
+	&sys_ipl_device_attr.attr,
+	&sys_ipl_fcp_wwpn_attr.attr,
+	&sys_ipl_fcp_lun_attr.attr,
+	&sys_ipl_fcp_bootprog_attr.attr,
+	&sys_ipl_fcp_br_lba_attr.attr,
+	NULL,
+};
+
+static struct attribute_group ipl_fcp_attr_group = {
+	.attrs = ipl_fcp_attrs,
+};
+
+/* CCW ipl device attributes */
+
+static struct attribute *ipl_ccw_attrs[] = {
+	&sys_ipl_type_attr.attr,
+	&sys_ipl_device_attr.attr,
+	NULL,
+};
+
+static struct attribute_group ipl_ccw_attr_group = {
+	.attrs = ipl_ccw_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 decl_subsys(ipl, NULL, NULL);
+
+/*
+ * reipl section
+ */
+
+/* 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);
+
+static struct attribute *reipl_ccw_attrs[] = {
+	&sys_reipl_ccw_device_attr.attr,
+	NULL,
+};
+
+static struct attribute_group reipl_ccw_attr_group = {
+	.name  = IPL_CCW_STR,
+	.attrs = reipl_ccw_attrs,
+};
+
+/* reipl type */
+
+static int reipl_set_type(enum ipl_type type)
+{
+	if (!(reipl_capabilities & type))
+		return -EINVAL;
+
+	switch(type) {
+	case IPL_TYPE_CCW:
+		if (MACHINE_IS_VM)
+			reipl_method = IPL_METHOD_CCW_VM;
+		else
+			reipl_method = IPL_METHOD_CCW_CIO;
+		break;
+	case IPL_TYPE_FCP:
+		if (diag308_set_works)
+			reipl_method = IPL_METHOD_FCP_RW_DIAG;
+		else if (MACHINE_IS_VM)
+			reipl_method = IPL_METHOD_FCP_RO_VM;
+		else
+			reipl_method = IPL_METHOD_FCP_RO_DIAG;
+		break;
+	default:
+		reipl_method = IPL_METHOD_NONE;
+	}
+	reipl_type = type;
+	return 0;
+}
+
+static ssize_t reipl_type_show(struct subsystem *subsys, char *page)
+{
+	return sprintf(page, "%s\n", ipl_type_str(reipl_type));
+}
+
+static ssize_t reipl_type_store(struct subsystem *subsys, 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);
+	return (rc != 0) ? rc : len;
+}
+
+static struct subsys_attribute reipl_type_attr =
+		__ATTR(reipl_type, 0644, reipl_type_show, reipl_type_store);
+
+static decl_subsys(reipl, NULL, NULL);
+
+/*
+ * dump section
+ */
+
+/* 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 ipl_type type)
+{
+	if (!(dump_capabilities & type))
+		return -EINVAL;
+	switch(type) {
+	case IPL_TYPE_CCW:
+		if (MACHINE_IS_VM)
+			dump_method = IPL_METHOD_CCW_VM;
+		else
+			dump_method = IPL_METHOD_CCW_CIO;
+		break;
+	case IPL_TYPE_FCP:
+		dump_method = IPL_METHOD_FCP_RW_DIAG;
+		break;
+	default:
+		dump_method = IPL_METHOD_NONE;
+	}
+	dump_type = type;
+	return 0;
+}
+
+static ssize_t dump_type_show(struct subsystem *subsys, char *page)
+{
+	return sprintf(page, "%s\n", ipl_type_str(dump_type));
+}
+
+static ssize_t dump_type_store(struct subsystem *subsys, const char *buf,
+			       size_t len)
+{
+	int rc = -EINVAL;
+
+	if (strncmp(buf, IPL_NONE_STR, strlen(IPL_NONE_STR)) == 0)
+		rc = dump_set_type(IPL_TYPE_NONE);
+	else if (strncmp(buf, IPL_CCW_STR, strlen(IPL_CCW_STR)) == 0)
+		rc = dump_set_type(IPL_TYPE_CCW);
+	else if (strncmp(buf, IPL_FCP_STR, strlen(IPL_FCP_STR)) == 0)
+		rc = dump_set_type(IPL_TYPE_FCP);
+	return (rc != 0) ? rc : len;
+}
+
+static struct subsys_attribute dump_type_attr =
+		__ATTR(dump_type, 0644, dump_type_show, dump_type_store);
+
+static decl_subsys(dump, NULL, NULL);
+
+#ifdef CONFIG_SMP
+static void dump_smp_stop_all(void)
+{
+	int cpu;
+	preempt_disable();
+	for_each_online_cpu(cpu) {
+		if (cpu == smp_processor_id())
+			continue;
+		while (signal_processor(cpu, sigp_stop) == sigp_busy)
+			udelay(10);
+	}
+	preempt_enable();
+}
+#else
+#define dump_smp_stop_all() do { } while (0)
+#endif
+
+/*
+ * Shutdown actions section
+ */
+
+static decl_subsys(shutdown_actions, NULL, NULL);
+
+/* on panic */
+
+static ssize_t on_panic_show(struct subsystem *subsys, char *page)
+{
+	return sprintf(page, "%s\n", shutdown_action_str(on_panic_action));
+}
+
+static ssize_t on_panic_store(struct subsystem *subsys, const char *buf,
+			      size_t len)
+{
+	if (strncmp(buf, SHUTDOWN_REIPL_STR, strlen(SHUTDOWN_REIPL_STR)) == 0)
+		on_panic_action = SHUTDOWN_REIPL;
+	else if (strncmp(buf, SHUTDOWN_DUMP_STR,
+			 strlen(SHUTDOWN_DUMP_STR)) == 0)
+		on_panic_action = SHUTDOWN_DUMP;
+	else if (strncmp(buf, SHUTDOWN_STOP_STR,
+			 strlen(SHUTDOWN_STOP_STR)) == 0)
+		on_panic_action = SHUTDOWN_STOP;
+	else
+		return -EINVAL;
+
+	return len;
+}
+
+static struct subsys_attribute on_panic_attr =
+		__ATTR(on_panic, 0644, on_panic_show, on_panic_store);
+
+static void print_fcp_block(struct ipl_parameter_block *fcp_block)
+{
+	printk(KERN_EMERG "wwpn:      %016llx\n",
+		(unsigned long long)fcp_block->ipl_info.fcp.wwpn);
+	printk(KERN_EMERG "lun:       %016llx\n",
+		(unsigned long long)fcp_block->ipl_info.fcp.lun);
+	printk(KERN_EMERG "bootprog:  %lld\n",
+		(unsigned long long)fcp_block->ipl_info.fcp.bootprog);
+	printk(KERN_EMERG "br_lba:    %lld\n",
+		(unsigned long long)fcp_block->ipl_info.fcp.br_lba);
+	printk(KERN_EMERG "device:    %llx\n",
+		(unsigned long long)fcp_block->ipl_info.fcp.devno);
+	printk(KERN_EMERG "opt:       %x\n", fcp_block->ipl_info.fcp.opt);
+}
+
+void do_reipl(void)
+{
+	struct ccw_dev_id devid;
+	static char buf[100];
+
+	switch (reipl_type) {
+	case IPL_TYPE_CCW:
+		printk(KERN_EMERG "reboot on ccw device: 0.0.%04x\n",
+			reipl_block_ccw->ipl_info.ccw.devno);
+		break;
+	case IPL_TYPE_FCP:
+		printk(KERN_EMERG "reboot on fcp device:\n");
+		print_fcp_block(reipl_block_fcp);
+		break;
+	default:
+		break;
+	}
+
+	switch (reipl_method) {
+	case IPL_METHOD_CCW_CIO:
+		devid.devno = reipl_block_ccw->ipl_info.ccw.devno;
+		devid.ssid  = 0;
+		reipl_ccw_dev(&devid);
+		break;
+	case IPL_METHOD_CCW_VM:
+		sprintf(buf, "IPL %X", reipl_block_ccw->ipl_info.ccw.devno);
+		cpcmd(buf, NULL, 0, NULL);
+		break;
+	case IPL_METHOD_CCW_DIAG:
+		diag308(DIAG308_SET, reipl_block_ccw);
+		diag308(DIAG308_IPL, NULL);
+		break;
+	case IPL_METHOD_FCP_RW_DIAG:
+		diag308(DIAG308_SET, reipl_block_fcp);
+		diag308(DIAG308_IPL, NULL);
+		break;
+	case IPL_METHOD_FCP_RO_DIAG:
+		diag308(DIAG308_IPL, NULL);
+		break;
+	case IPL_METHOD_FCP_RO_VM:
+		cpcmd("IPL", NULL, 0, NULL);
+		break;
+	case IPL_METHOD_NONE:
+	default:
+		if (MACHINE_IS_VM)
+			cpcmd("IPL", NULL, 0, NULL);
+		diag308(DIAG308_IPL, NULL);
+		break;
+	}
+	panic("reipl failed!\n");
+}
+
+static void do_dump(void)
+{
+	struct ccw_dev_id devid;
+	static char buf[100];
+
+	switch (dump_type) {
+	case IPL_TYPE_CCW:
+		printk(KERN_EMERG "Automatic dump on ccw device: 0.0.%04x\n",
+		       dump_block_ccw->ipl_info.ccw.devno);
+		break;
+	case IPL_TYPE_FCP:
+		printk(KERN_EMERG "Automatic dump on fcp device:\n");
+		print_fcp_block(dump_block_fcp);
+		break;
+	default:
+		return;
+	}
+
+	switch (dump_method) {
+	case IPL_METHOD_CCW_CIO:
+		dump_smp_stop_all();
+		devid.devno = dump_block_ccw->ipl_info.ccw.devno;
+		devid.ssid  = 0;
+		reipl_ccw_dev(&devid);
+		break;
+	case IPL_METHOD_CCW_VM:
+		dump_smp_stop_all();
+		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 IPL_METHOD_CCW_DIAG:
+		diag308(DIAG308_SET, dump_block_ccw);
+		diag308(DIAG308_DUMP, NULL);
+		break;
+	case IPL_METHOD_FCP_RW_DIAG:
+		diag308(DIAG308_SET, dump_block_fcp);
+		diag308(DIAG308_DUMP, NULL);
+		break;
+	case IPL_METHOD_NONE:
+	default:
+		return;
+	}
+	printk(KERN_EMERG "Dump failed!\n");
+}
+
+/* init functions */
+
+static int __init ipl_register_fcp_files(void)
+{
+	int rc;
+
+	rc = sysfs_create_group(&ipl_subsys.kset.kobj,
+				&ipl_fcp_attr_group);
+	if (rc)
+		goto out;
+	rc = sysfs_create_bin_file(&ipl_subsys.kset.kobj,
+				   &ipl_parameter_attr);
+	if (rc)
+		goto out_ipl_parm;
+	rc = sysfs_create_bin_file(&ipl_subsys.kset.kobj,
+				   &ipl_scp_data_attr);
+	if (!rc)
+		goto out;
+
+	sysfs_remove_bin_file(&ipl_subsys.kset.kobj, &ipl_parameter_attr);
+
+out_ipl_parm:
+	sysfs_remove_group(&ipl_subsys.kset.kobj, &ipl_fcp_attr_group);
+out:
+	return rc;
+}
+
+static int __init ipl_init(void)
+{
+	int rc;
+
+	rc = firmware_register(&ipl_subsys);
+	if (rc)
+		return rc;
+	switch (ipl_get_type()) {
+	case IPL_TYPE_CCW:
+		rc = sysfs_create_group(&ipl_subsys.kset.kobj,
+					&ipl_ccw_attr_group);
+		break;
+	case IPL_TYPE_FCP:
+		rc = ipl_register_fcp_files();
+		break;
+	default:
+		rc = sysfs_create_group(&ipl_subsys.kset.kobj,
+					&ipl_unknown_attr_group);
+		break;
+	}
+	if (rc)
+		firmware_unregister(&ipl_subsys);
+	return rc;
+}
+
+static void __init reipl_probe(void)
+{
+	void *buffer;
+
+	buffer = (void *) get_zeroed_page(GFP_KERNEL);
+	if (!buffer)
+		return;
+	if (diag308(DIAG308_STORE, buffer) == DIAG308_RC_OK)
+		diag308_set_works = 1;
+	free_page((unsigned long)buffer);
+}
+
+static int __init reipl_ccw_init(void)
+{
+	int rc;
+
+	reipl_block_ccw = (void *) get_zeroed_page(GFP_KERNEL);
+	if (!reipl_block_ccw)
+		return -ENOMEM;
+	rc = sysfs_create_group(&reipl_subsys.kset.kobj, &reipl_ccw_attr_group);
+	if (rc) {
+		free_page((unsigned long)reipl_block_ccw);
+		return rc;
+	}
+	reipl_block_ccw->hdr.len = IPL_PARM_BLK_CCW_LEN;
+	reipl_block_ccw->hdr.version = IPL_PARM_BLOCK_VERSION;
+	reipl_block_ccw->hdr.blk0_len = sizeof(reipl_block_ccw->ipl_info.ccw);
+	reipl_block_ccw->hdr.pbt = DIAG308_IPL_TYPE_CCW;
+	if (ipl_get_type() == IPL_TYPE_CCW)
+		reipl_block_ccw->ipl_info.ccw.devno = ipl_devno;
+	reipl_capabilities |= IPL_TYPE_CCW;
+	return 0;
+}
+
+static int __init reipl_fcp_init(void)
+{
+	int rc;
+
+	if ((!diag308_set_works) && (ipl_get_type() != IPL_TYPE_FCP))
+		return 0;
+	if ((!diag308_set_works) && (ipl_get_type() == IPL_TYPE_FCP))
+		make_attrs_ro(reipl_fcp_attrs);
+
+	reipl_block_fcp = (void *) get_zeroed_page(GFP_KERNEL);
+	if (!reipl_block_fcp)
+		return -ENOMEM;
+	rc = sysfs_create_group(&reipl_subsys.kset.kobj, &reipl_fcp_attr_group);
+	if (rc) {
+		free_page((unsigned long)reipl_block_fcp);
+		return rc;
+	}
+	if (ipl_get_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 =
+			sizeof(reipl_block_fcp->ipl_info.fcp);
+		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_init(void)
+{
+	int rc;
+
+	rc = firmware_register(&reipl_subsys);
+	if (rc)
+		return rc;
+	rc = subsys_create_file(&reipl_subsys, &reipl_type_attr);
+	if (rc) {
+		firmware_unregister(&reipl_subsys);
+		return rc;
+	}
+	rc = reipl_ccw_init();
+	if (rc)
+		return rc;
+	rc = reipl_fcp_init();
+	if (rc)
+		return rc;
+	rc = reipl_set_type(ipl_get_type());
+	if (rc)
+		return rc;
+	return 0;
+}
+
+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_subsys.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 = sizeof(reipl_block_ccw->ipl_info.ccw);
+	dump_block_ccw->hdr.pbt = DIAG308_IPL_TYPE_CCW;
+	dump_capabilities |= IPL_TYPE_CCW;
+	return 0;
+}
+
+extern char s390_readinfo_sccb[];
+
+static int __init dump_fcp_init(void)
+{
+	int rc;
+
+	if(!(s390_readinfo_sccb[91] & 0x2))
+		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_subsys.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 = sizeof(dump_block_fcp->ipl_info.fcp);
+	dump_block_fcp->hdr.pbt = DIAG308_IPL_TYPE_FCP;
+	dump_block_fcp->ipl_info.fcp.opt = DIAG308_IPL_OPT_DUMP;
+	dump_capabilities |= IPL_TYPE_FCP;
+	return 0;
+}
+
+#define SHUTDOWN_ON_PANIC_PRIO 0
+
+static int shutdown_on_panic_notify(struct notifier_block *self,
+				    unsigned long event, void *data)
+{
+	if (on_panic_action == SHUTDOWN_DUMP)
+		do_dump();
+	else if (on_panic_action == SHUTDOWN_REIPL)
+		do_reipl();
+	return NOTIFY_OK;
+}
+
+static struct notifier_block shutdown_on_panic_nb = {
+	.notifier_call = shutdown_on_panic_notify,
+	.priority = SHUTDOWN_ON_PANIC_PRIO
+};
+
+static int __init dump_init(void)
+{
+	int rc;
+
+	rc = firmware_register(&dump_subsys);
+	if (rc)
+		return rc;
+	rc = subsys_create_file(&dump_subsys, &dump_type_attr);
+	if (rc) {
+		firmware_unregister(&dump_subsys);
+		return rc;
+	}
+	rc = dump_ccw_init();
+	if (rc)
+		return rc;
+	rc = dump_fcp_init();
+	if (rc)
+		return rc;
+	dump_set_type(IPL_TYPE_NONE);
+	return 0;
+}
+
+static int __init shutdown_actions_init(void)
+{
+	int rc;
+
+	rc = firmware_register(&shutdown_actions_subsys);
+	if (rc)
+		return rc;
+	rc = subsys_create_file(&shutdown_actions_subsys, &on_panic_attr);
+	if (rc) {
+		firmware_unregister(&shutdown_actions_subsys);
+		return rc;
+	}
+	atomic_notifier_chain_register(&panic_notifier_list,
+				       &shutdown_on_panic_nb);
+	return 0;
+}
+
+static int __init s390_ipl_init(void)
+{
+	int rc;
+
+	reipl_probe();
+	rc = ipl_init();
+	if (rc)
+		return rc;
+	rc = reipl_init();
+	if (rc)
+		return rc;
+	rc = dump_init();
+	if (rc)
+		return rc;
+	rc = shutdown_actions_init();
+	if (rc)
+		return rc;
+	return 0;
+}
+
+__initcall(s390_ipl_init);