--- /dev/null
+/*
+ * ipl/reipl/dump support for Linux on s390.
+ *
+ * Copyright IBM Corp. 2005, 2012
+ * Author(s): Michael Holzheu <holzheu@de.ibm.com>
+ * Heiko Carstens <heiko.carstens@de.ibm.com>
+ * Volker Sameske <sameske@de.ibm.com>
+ */
+
+#include <linux/types.h>
+#include <linux/module.h>
+#include <linux/device.h>
+#include <linux/delay.h>
+#include <linux/reboot.h>
+#include <linux/ctype.h>
+#include <linux/fs.h>
+#include <linux/gfp.h>
+#include <linux/crash_dump.h>
+#include <linux/debug_locks.h>
+#include <asm/ipl.h>
+#include <asm/smp.h>
+#include <asm/setup.h>
+#include <asm/cpcmd.h>
+#include <asm/cio.h>
+#include <asm/ebcdic.h>
+#include <asm/reset.h>
+#include <asm/sclp.h>
+#include <asm/checksum.h>
+#include <asm/debug.h>
+#include <asm/os_info.h>
+#include "entry.h"
+
+#define IPL_PARM_BLOCK_VERSION 0
+
+#define IPL_UNKNOWN_STR "unknown"
+#define IPL_CCW_STR "ccw"
+#define IPL_FCP_STR "fcp"
+#define IPL_FCP_DUMP_STR "fcp_dump"
+#define IPL_NSS_STR "nss"
+
+#define DUMP_CCW_STR "ccw"
+#define DUMP_FCP_STR "fcp"
+#define DUMP_NONE_STR "none"
+
+/*
+ * Four shutdown trigger types are supported:
+ * - panic
+ * - halt
+ * - power off
+ * - reipl
+ * - restart
+ */
+#define ON_PANIC_STR "on_panic"
+#define ON_HALT_STR "on_halt"
+#define ON_POFF_STR "on_poff"
+#define ON_REIPL_STR "on_reboot"
+#define ON_RESTART_STR "on_restart"
+
+struct shutdown_action;
+struct shutdown_trigger {
+ char *name;
+ struct shutdown_action *action;
+};
+
+/*
+ * The following shutdown action types are supported:
+ */
+#define SHUTDOWN_ACTION_IPL_STR "ipl"
+#define SHUTDOWN_ACTION_REIPL_STR "reipl"
+#define SHUTDOWN_ACTION_DUMP_STR "dump"
+#define SHUTDOWN_ACTION_VMCMD_STR "vmcmd"
+#define SHUTDOWN_ACTION_STOP_STR "stop"
+#define SHUTDOWN_ACTION_DUMP_REIPL_STR "dump_reipl"
+
+struct shutdown_action {
+ char *name;
+ void (*fn) (struct shutdown_trigger *trigger);
+ int (*init) (void);
+ int init_rc;
+};
+
+static char *ipl_type_str(enum ipl_type type)
+{
+ switch (type) {
+ case IPL_TYPE_CCW:
+ return IPL_CCW_STR;
+ case IPL_TYPE_FCP:
+ return IPL_FCP_STR;
+ case IPL_TYPE_FCP_DUMP:
+ return IPL_FCP_DUMP_STR;
+ case IPL_TYPE_NSS:
+ return IPL_NSS_STR;
+ case IPL_TYPE_UNKNOWN:
+ default:
+ return IPL_UNKNOWN_STR;
+ }
+}
+
+enum dump_type {
+ DUMP_TYPE_NONE = 1,
+ DUMP_TYPE_CCW = 2,
+ DUMP_TYPE_FCP = 4,
+};
+
+static char *dump_type_str(enum dump_type type)
+{
+ switch (type) {
+ case DUMP_TYPE_NONE:
+ return DUMP_NONE_STR;
+ case DUMP_TYPE_CCW:
+ return DUMP_CCW_STR;
+ case DUMP_TYPE_FCP:
+ return DUMP_FCP_STR;
+ default:
+ return NULL;
+ }
+}
+
+/*
+ * Must be in data section since the bss section
+ * is not cleared when these are accessed.
+ */
+static u16 ipl_devno __attribute__((__section__(".data"))) = 0;
+u32 ipl_flags __attribute__((__section__(".data"))) = 0;
+
+enum ipl_method {
+ REIPL_METHOD_CCW_CIO,
+ REIPL_METHOD_CCW_DIAG,
+ REIPL_METHOD_CCW_VM,
+ REIPL_METHOD_FCP_RO_DIAG,
+ REIPL_METHOD_FCP_RW_DIAG,
+ REIPL_METHOD_FCP_RO_VM,
+ REIPL_METHOD_FCP_DUMP,
+ REIPL_METHOD_NSS,
+ REIPL_METHOD_NSS_DIAG,
+ REIPL_METHOD_DEFAULT,
+};
+
+enum dump_method {
+ DUMP_METHOD_NONE,
+ DUMP_METHOD_CCW_CIO,
+ DUMP_METHOD_CCW_DIAG,
+ DUMP_METHOD_CCW_VM,
+ DUMP_METHOD_FCP_DIAG,
+};
+
+static int diag308_set_works = 0;
+
+static struct ipl_parameter_block ipl_block;
+
+static int reipl_capabilities = IPL_TYPE_UNKNOWN;
+
+static enum ipl_type reipl_type = IPL_TYPE_UNKNOWN;
+static enum ipl_method reipl_method = REIPL_METHOD_DEFAULT;
+static struct ipl_parameter_block *reipl_block_fcp;
+static struct ipl_parameter_block *reipl_block_ccw;
+static struct ipl_parameter_block *reipl_block_nss;
+static struct ipl_parameter_block *reipl_block_actual;
+
+static int dump_capabilities = DUMP_TYPE_NONE;
+static enum dump_type dump_type = DUMP_TYPE_NONE;
+static enum dump_method dump_method = DUMP_METHOD_NONE;
+static struct ipl_parameter_block *dump_block_fcp;
+static struct ipl_parameter_block *dump_block_ccw;
+
+static struct sclp_ipl_info sclp_ipl_info;
+
+int diag308(unsigned long subcode, void *addr)
+{
+ register unsigned long _addr asm("0") = (unsigned long) addr;
+ register unsigned long _rc asm("1") = 0;
+
+ asm volatile(
+ " diag %0,%2,0x308\n"
+ "0:\n"
+ EX_TABLE(0b,0b)
+ : "+d" (_addr), "+d" (_rc)
+ : "d" (subcode) : "cc", "memory");
+ return _rc;
+}
+EXPORT_SYMBOL_GPL(diag308);
+
+/* SYSFS */
+
+#define IPL_ATTR_SHOW_FN(_prefix, _name, _format, args...) \
+static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj, \
+ struct kobj_attribute *attr, \
+ char *page) \
+{ \
+ return snprintf(page, PAGE_SIZE, _format, ##args); \
+}
+
+#define DEFINE_IPL_ATTR_RO(_prefix, _name, _format, _value) \
+IPL_ATTR_SHOW_FN(_prefix, _name, _format, _value) \
+static struct kobj_attribute sys_##_prefix##_##_name##_attr = \
+ __ATTR(_name, S_IRUGO, sys_##_prefix##_##_name##_show, NULL)
+
+#define DEFINE_IPL_ATTR_RW(_prefix, _name, _fmt_out, _fmt_in, _value) \
+IPL_ATTR_SHOW_FN(_prefix, _name, _fmt_out, (unsigned long long) _value) \
+static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj, \
+ struct kobj_attribute *attr, \
+ const char *buf, size_t len) \
+{ \
+ unsigned long long value; \
+ if (sscanf(buf, _fmt_in, &value) != 1) \
+ return -EINVAL; \
+ _value = value; \
+ return len; \
+} \
+static struct kobj_attribute sys_##_prefix##_##_name##_attr = \
+ __ATTR(_name,(S_IRUGO | S_IWUSR), \
+ sys_##_prefix##_##_name##_show, \
+ sys_##_prefix##_##_name##_store)
+
+#define DEFINE_IPL_ATTR_STR_RW(_prefix, _name, _fmt_out, _fmt_in, _value)\
+IPL_ATTR_SHOW_FN(_prefix, _name, _fmt_out, _value) \
+static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj, \
+ struct kobj_attribute *attr, \
+ const char *buf, size_t len) \
+{ \
+ strncpy(_value, buf, sizeof(_value) - 1); \
+ strim(_value); \
+ return len; \
+} \
+static struct kobj_attribute sys_##_prefix##_##_name##_attr = \
+ __ATTR(_name,(S_IRUGO | S_IWUSR), \
+ sys_##_prefix##_##_name##_show, \
+ sys_##_prefix##_##_name##_store)
+
+static void make_attrs_ro(struct attribute **attrs)
+{
+ while (*attrs) {
+ (*attrs)->mode = S_IRUGO;
+ attrs++;
+ }
+}
+
+/*
+ * ipl section
+ */
+
+static __init enum ipl_type get_ipl_type(void)
+{
+ struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START;
+
+ if (ipl_flags & IPL_NSS_VALID)
+ return IPL_TYPE_NSS;
+ if (!(ipl_flags & IPL_DEVNO_VALID))
+ return IPL_TYPE_UNKNOWN;
+ if (!(ipl_flags & IPL_PARMBLOCK_VALID))
+ return IPL_TYPE_CCW;
+ if (ipl->hdr.version > IPL_MAX_SUPPORTED_VERSION)
+ return IPL_TYPE_UNKNOWN;
+ if (ipl->hdr.pbt != DIAG308_IPL_TYPE_FCP)
+ return IPL_TYPE_UNKNOWN;
+ if (ipl->ipl_info.fcp.opt == DIAG308_IPL_OPT_DUMP)
+ return IPL_TYPE_FCP_DUMP;
+ return IPL_TYPE_FCP;
+}
+
+struct ipl_info ipl_info;
+EXPORT_SYMBOL_GPL(ipl_info);
+
+static ssize_t ipl_type_show(struct kobject *kobj, struct kobj_attribute *attr,
+ char *page)
+{
+ return sprintf(page, "%s\n", ipl_type_str(ipl_info.type));
+}
+
+static struct kobj_attribute sys_ipl_type_attr = __ATTR_RO(ipl_type);
+
+/* VM IPL PARM routines */
+static size_t reipl_get_ascii_vmparm(char *dest, size_t size,
+ const struct ipl_parameter_block *ipb)
+{
+ int i;
+ size_t len;
+ char has_lowercase = 0;
+
+ len = 0;
+ if ((ipb->ipl_info.ccw.vm_flags & DIAG308_VM_FLAGS_VP_VALID) &&
+ (ipb->ipl_info.ccw.vm_parm_len > 0)) {
+
+ len = min_t(size_t, size - 1, ipb->ipl_info.ccw.vm_parm_len);
+ memcpy(dest, ipb->ipl_info.ccw.vm_parm, len);
+ /* If at least one character is lowercase, we assume mixed
+ * case; otherwise we convert everything to lowercase.
+ */
+ for (i = 0; i < len; i++)
+ if ((dest[i] > 0x80 && dest[i] < 0x8a) || /* a-i */
+ (dest[i] > 0x90 && dest[i] < 0x9a) || /* j-r */
+ (dest[i] > 0xa1 && dest[i] < 0xaa)) { /* s-z */
+ has_lowercase = 1;
+ break;
+ }
+ if (!has_lowercase)
+ EBC_TOLOWER(dest, len);
+ EBCASC(dest, len);
+ }
+ dest[len] = 0;
+
+ return len;
+}
+
+size_t append_ipl_vmparm(char *dest, size_t size)
+{
+ size_t rc;
+
+ rc = 0;
+ if (diag308_set_works && (ipl_block.hdr.pbt == DIAG308_IPL_TYPE_CCW))
+ rc = reipl_get_ascii_vmparm(dest, size, &ipl_block);
+ else
+ dest[0] = 0;
+ return rc;
+}
+
+static ssize_t ipl_vm_parm_show(struct kobject *kobj,
+ struct kobj_attribute *attr, char *page)
+{
+ char parm[DIAG308_VMPARM_SIZE + 1] = {};
+
+ append_ipl_vmparm(parm, sizeof(parm));
+ return sprintf(page, "%s\n", parm);
+}
+
+static size_t scpdata_length(const char* buf, size_t count)
+{
+ while (count) {
+ if (buf[count - 1] != '\0' && buf[count - 1] != ' ')
+ break;
+ count--;
+ }
+ return count;
+}
+
+static size_t reipl_append_ascii_scpdata(char *dest, size_t size,
+ const struct ipl_parameter_block *ipb)
+{
+ size_t count;
+ size_t i;
+ int has_lowercase;
+
+ count = min(size - 1, scpdata_length(ipb->ipl_info.fcp.scp_data,
+ ipb->ipl_info.fcp.scp_data_len));
+ if (!count)
+ goto out;
+
+ has_lowercase = 0;
+ for (i = 0; i < count; i++) {
+ if (!isascii(ipb->ipl_info.fcp.scp_data[i])) {
+ count = 0;
+ goto out;
+ }
+ if (!has_lowercase && islower(ipb->ipl_info.fcp.scp_data[i]))
+ has_lowercase = 1;
+ }
+
+ if (has_lowercase)
+ memcpy(dest, ipb->ipl_info.fcp.scp_data, count);
+ else
+ for (i = 0; i < count; i++)
+ dest[i] = tolower(ipb->ipl_info.fcp.scp_data[i]);
+out:
+ dest[count] = '\0';
+ return count;
+}
+
+size_t append_ipl_scpdata(char *dest, size_t len)
+{
+ size_t rc;
+
+ rc = 0;
+ if (ipl_block.hdr.pbt == DIAG308_IPL_TYPE_FCP)
+ rc = reipl_append_ascii_scpdata(dest, len, &ipl_block);
+ else
+ dest[0] = 0;
+ return rc;
+}
+
+
+static struct kobj_attribute sys_ipl_vm_parm_attr =
+ __ATTR(parm, S_IRUGO, ipl_vm_parm_show, NULL);
+
+static ssize_t sys_ipl_device_show(struct kobject *kobj,
+ struct kobj_attribute *attr, char *page)
+{
+ struct ipl_parameter_block *ipl = IPL_PARMBLOCK_START;
+
+ switch (ipl_info.type) {
+ case IPL_TYPE_CCW:
+ return sprintf(page, "0.0.%04x\n", ipl_devno);
+ case IPL_TYPE_FCP:
+ case IPL_TYPE_FCP_DUMP:
+ return sprintf(page, "0.0.%04x\n", ipl->ipl_info.fcp.devno);
+ default:
+ return 0;
+ }
+}
+
+static struct kobj_attribute sys_ipl_device_attr =
+ __ATTR(device, S_IRUGO, sys_ipl_device_show, NULL);
+
+static ssize_t ipl_parameter_read(struct file *filp, struct kobject *kobj,
+ struct bin_attribute *attr, char *buf,
+ loff_t off, size_t count)
+{
+ return memory_read_from_buffer(buf, count, &off, IPL_PARMBLOCK_START,
+ IPL_PARMBLOCK_SIZE);
+}
+static struct bin_attribute ipl_parameter_attr =
+ __BIN_ATTR(binary_parameter, S_IRUGO, ipl_parameter_read, NULL,
+ PAGE_SIZE);
+
+static ssize_t ipl_scp_data_read(struct file *filp, struct kobject *kobj,
+ struct bin_attribute *attr, char *buf,
+ loff_t off, size_t count)
+{
+ unsigned int size = IPL_PARMBLOCK_START->ipl_info.fcp.scp_data_len;
+ void *scp_data = &IPL_PARMBLOCK_START->ipl_info.fcp.scp_data;
+
+ return memory_read_from_buffer(buf, count, &off, scp_data, size);
+}
+static struct bin_attribute ipl_scp_data_attr =
+ __BIN_ATTR(scp_data, S_IRUGO, ipl_scp_data_read, NULL, PAGE_SIZE);
+
+static struct bin_attribute *ipl_fcp_bin_attrs[] = {
+ &ipl_parameter_attr,
+ &ipl_scp_data_attr,
+ NULL,
+};
+
+/* 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 ssize_t ipl_ccw_loadparm_show(struct kobject *kobj,
+ struct kobj_attribute *attr, char *page)
+{
+ char loadparm[LOADPARM_LEN + 1] = {};
+
+ if (!sclp_ipl_info.is_valid)
+ return sprintf(page, "#unknown#\n");
+ memcpy(loadparm, &sclp_ipl_info.loadparm, LOADPARM_LEN);
+ EBCASC(loadparm, LOADPARM_LEN);
+ strim(loadparm);
+ return sprintf(page, "%s\n", loadparm);
+}
+
+static struct kobj_attribute sys_ipl_ccw_loadparm_attr =
+ __ATTR(loadparm, 0444, ipl_ccw_loadparm_show, NULL);
+
+static struct attribute *ipl_fcp_attrs[] = {
+ &sys_ipl_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,
+ &sys_ipl_ccw_loadparm_attr.attr,
+ NULL,
+};
+
+static struct attribute_group ipl_fcp_attr_group = {
+ .attrs = ipl_fcp_attrs,
+ .bin_attrs = ipl_fcp_bin_attrs,
+};
+
+/* CCW ipl device attributes */
+
+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 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 = sysfs_create_group(&ipl_kset->kobj, &ipl_fcp_attr_group);
+ 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 =
+ __BIN_ATTR(scp_data, (S_IRUGO | S_IWUSR), reipl_fcp_scpdata_read,
+ reipl_fcp_scpdata_write, PAGE_SIZE);
+
+static struct bin_attribute *reipl_fcp_bin_attrs[] = {
+ &sys_reipl_fcp_scp_data_attr,
+ NULL,
+};
+
+DEFINE_IPL_ATTR_RW(reipl_fcp, wwpn, "0x%016llx\n", "%llx\n",
+ reipl_block_fcp->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 void reipl_get_ascii_loadparm(char *loadparm,
+ struct ipl_parameter_block *ibp)
+{
+ memcpy(loadparm, ibp->hdr.loadparm, LOADPARM_LEN);
+ EBCASC(loadparm, LOADPARM_LEN);
+ loadparm[LOADPARM_LEN] = 0;
+ strim(loadparm);
+}
+
+static ssize_t reipl_generic_loadparm_show(struct ipl_parameter_block *ipb,
+ char *page)
+{
+ char buf[LOADPARM_LEN + 1];
+
+ reipl_get_ascii_loadparm(buf, ipb);
+ return sprintf(page, "%s\n", buf);
+}
+
+static ssize_t reipl_generic_loadparm_store(struct ipl_parameter_block *ipb,
+ const char *buf, size_t len)
+{
+ int i, lp_len;
+
+ /* ignore trailing newline */
+ lp_len = len;
+ if ((len > 0) && (buf[len - 1] == '\n'))
+ lp_len--;
+ /* loadparm can have max 8 characters and must not start with a blank */
+ if ((lp_len > LOADPARM_LEN) || ((lp_len > 0) && (buf[0] == ' ')))
+ return -EINVAL;
+ /* loadparm can only contain "a-z,A-Z,0-9,SP,." */
+ for (i = 0; i < lp_len; i++) {
+ if (isalpha(buf[i]) || isdigit(buf[i]) || (buf[i] == ' ') ||
+ (buf[i] == '.'))
+ continue;
+ return -EINVAL;
+ }
+ /* initialize loadparm with blanks */
+ memset(ipb->hdr.loadparm, ' ', LOADPARM_LEN);
+ /* copy and convert to ebcdic */
+ memcpy(ipb->hdr.loadparm, buf, lp_len);
+ ASCEBC(ipb->hdr.loadparm, LOADPARM_LEN);
+ return len;
+}
+
+/* FCP wrapper */
+static ssize_t reipl_fcp_loadparm_show(struct kobject *kobj,
+ struct kobj_attribute *attr, char *page)
+{
+ return reipl_generic_loadparm_show(reipl_block_fcp, page);
+}
+
+static ssize_t reipl_fcp_loadparm_store(struct kobject *kobj,
+ struct kobj_attribute *attr,
+ const char *buf, size_t len)
+{
+ return reipl_generic_loadparm_store(reipl_block_fcp, buf, len);
+}
+
+static struct kobj_attribute sys_reipl_fcp_loadparm_attr =
+ __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_fcp_loadparm_show,
+ reipl_fcp_loadparm_store);
+
+static struct attribute *reipl_fcp_attrs[] = {
+ &sys_reipl_fcp_device_attr.attr,
+ &sys_reipl_fcp_wwpn_attr.attr,
+ &sys_reipl_fcp_lun_attr.attr,
+ &sys_reipl_fcp_bootprog_attr.attr,
+ &sys_reipl_fcp_br_lba_attr.attr,
+ &sys_reipl_fcp_loadparm_attr.attr,
+ NULL,
+};
+
+static struct attribute_group reipl_fcp_attr_group = {
+ .attrs = reipl_fcp_attrs,
+ .bin_attrs = reipl_fcp_bin_attrs,
+};
+
+/* 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);
+
+/* 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->hdr.loadparm, &sclp_ipl_info.loadparm, LOADPARM_LEN);
+ else
+ /* read scp info failed: set empty loadparm (EBCDIC blanks) */
+ memset(ipb->hdr.loadparm, 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;
+ }
+
+ if (ipl_info.type == IPL_TYPE_FCP) {
+ memcpy(reipl_block_fcp, IPL_PARMBLOCK_START, PAGE_SIZE);
+ /*
+ * Fix loadparm: There are systems where the (SCSI) LOADPARM
+ * is invalid in the SCSI IPL parameter block, so take it
+ * always from sclp_ipl_info.
+ */
+ memcpy(reipl_block_fcp->hdr.loadparm, sclp_ipl_info.loadparm,
+ LOADPARM_LEN);
+ } 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_RW(on_reboot);
+
+static void do_machine_restart(char *__unused)
+{
+ smp_send_stop();
+ on_reboot_trigger.action->fn(&on_reboot_trigger);
+ reipl_run(NULL);
+}
+void (*_machine_restart)(char *command) = do_machine_restart;
+
+/* on panic */
+
+static struct shutdown_trigger on_panic_trigger = {ON_PANIC_STR, &stop_action};
+
+static ssize_t on_panic_show(struct kobject *kobj,
+ struct kobj_attribute *attr, char *page)
+{
+ return sprintf(page, "%s\n", on_panic_trigger.action->name);
+}
+
+static ssize_t on_panic_store(struct kobject *kobj,
+ struct kobj_attribute *attr,
+ const char *buf, size_t len)
+{
+ return set_trigger(buf, &on_panic_trigger, len);
+}
+static struct kobj_attribute on_panic_attr = __ATTR_RW(on_panic);
+
+static void do_panic(void)
+{
+ lgr_info_log();
+ on_panic_trigger.action->fn(&on_panic_trigger);
+ stop_run(&on_panic_trigger);
+}
+
+/* on restart */
+
+static struct shutdown_trigger on_restart_trigger = {ON_RESTART_STR,
+ &stop_action};
+
+static ssize_t on_restart_show(struct kobject *kobj,
+ struct kobj_attribute *attr, char *page)
+{
+ return sprintf(page, "%s\n", on_restart_trigger.action->name);
+}
+
+static ssize_t on_restart_store(struct kobject *kobj,
+ struct kobj_attribute *attr,
+ const char *buf, size_t len)
+{
+ return set_trigger(buf, &on_restart_trigger, len);
+}
+static struct kobj_attribute on_restart_attr = __ATTR_RW(on_restart);
+
+static void __do_restart(void *ignore)
+{
+ __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_RW(on_halt);
+
+static void do_machine_halt(void)
+{
+ smp_send_stop();
+ on_halt_trigger.action->fn(&on_halt_trigger);
+ stop_run(&on_halt_trigger);
+}
+void (*_machine_halt)(void) = do_machine_halt;
+
+/* on power off */
+
+static struct shutdown_trigger on_poff_trigger = {ON_POFF_STR, &stop_action};
+
+static ssize_t on_poff_show(struct kobject *kobj,
+ struct kobj_attribute *attr, char *page)
+{
+ return sprintf(page, "%s\n", on_poff_trigger.action->name);
+}
+
+static ssize_t on_poff_store(struct kobject *kobj,
+ struct kobj_attribute *attr,
+ const char *buf, size_t len)
+{
+ return set_trigger(buf, &on_poff_trigger, len);
+}
+static struct kobj_attribute on_poff_attr = __ATTR_RW(on_poff);
+
+static void do_machine_power_off(void)
+{
+ smp_send_stop();
+ on_poff_trigger.action->fn(&on_poff_trigger);
+ stop_run(&on_poff_trigger);
+}
+void (*_machine_power_off)(void) = do_machine_power_off;
+
+static struct attribute *shutdown_action_attrs[] = {
+ &on_restart_attr.attr,
+ &on_reboot_attr.attr,
+ &on_panic_attr.attr,
+ &on_halt_attr.attr,
+ &on_poff_attr.attr,
+ NULL,
+};
+
+static struct attribute_group shutdown_action_attr_group = {
+ .attrs = shutdown_action_attrs,
+};
+
+static void __init shutdown_triggers_init(void)
+{
+ shutdown_actions_kset = kset_create_and_add("shutdown_actions", NULL,
+ firmware_kobj);
+ if (!shutdown_actions_kset)
+ goto fail;
+ if (sysfs_create_group(&shutdown_actions_kset->kobj,
+ &shutdown_action_attr_group))
+ goto fail;
+ return;
+fail:
+ panic("shutdown_triggers_init failed\n");
+}
+
+static void __init shutdown_actions_init(void)
+{
+ int i;
+
+ for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) {
+ if (!shutdown_actions_list[i]->init)
+ continue;
+ shutdown_actions_list[i]->init_rc =
+ shutdown_actions_list[i]->init();
+ }
+}
+
+static int __init s390_ipl_init(void)
+{
+ char str[8] = {0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40, 0x40};
+
+ sclp_get_ipl_info(&sclp_ipl_info);
+ /*
+ * Fix loadparm: There are systems where the (SCSI) LOADPARM
+ * returned by read SCP info is invalid (contains EBCDIC blanks)
+ * when the system has been booted via diag308. In that case we use
+ * the value from diag308, if available.
+ *
+ * There are also systems where diag308 store does not work in
+ * case the system is booted from HMC. Fortunately in this case
+ * READ SCP info provides the correct value.
+ */
+ if (memcmp(sclp_ipl_info.loadparm, str, sizeof(str)) == 0 &&
+ diag308_set_works)
+ memcpy(sclp_ipl_info.loadparm, ipl_block.hdr.loadparm,
+ LOADPARM_LEN);
+ shutdown_actions_init();
+ shutdown_triggers_init();
+ return 0;
+}
+
+__initcall(s390_ipl_init);
+
+static void __init strncpy_skip_quote(char *dst, char *src, int n)
+{
+ int sx, dx;
+
+ dx = 0;
+ for (sx = 0; src[sx] != 0; sx++) {
+ if (src[sx] == '"')
+ continue;
+ dst[dx++] = src[sx];
+ if (dx >= n)
+ break;
+ }
+}
+
+static int __init vmcmd_on_reboot_setup(char *str)
+{
+ if (!MACHINE_IS_VM)
+ return 1;
+ strncpy_skip_quote(vmcmd_on_reboot, str, 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;
+
+ if (diag308_set_works) {
+ diag308_reset();
+ return;
+ }
+ list_for_each_entry(reset, &rcall, list)
+ reset->fn();
+}
+
+u32 dump_prefix_page;
+
+void s390_reset_system(void (*fn_pre)(void),
+ void (*fn_post)(void *), void *data)
+{
+ struct _lowcore *lc;
+
+ lc = (struct _lowcore *)(unsigned long) store_prefix();
+
+ /* Stack for interrupt/machine check handler */
+ lc->panic_stack = S390_lowcore.panic_stack;
+
+ /* Save prefix page address for dump case */
+ dump_prefix_page = (u32)(unsigned long) lc;
+
+ /* Disable prefixing */
+ set_prefix(0);
+
+ /* Disable lowcore protection */
+ __ctl_clear_bit(0,28);
+
+ /* Set new machine check handler */
+ S390_lowcore.mcck_new_psw.mask = PSW_KERNEL_BITS | PSW_MASK_DAT;
+ S390_lowcore.mcck_new_psw.addr =
+ PSW_ADDR_AMODE | (unsigned long) s390_base_mcck_handler;
+
+ /* Set new program check handler */
+ S390_lowcore.program_new_psw.mask = PSW_KERNEL_BITS | PSW_MASK_DAT;
+ S390_lowcore.program_new_psw.addr =
+ PSW_ADDR_AMODE | (unsigned long) s390_base_pgm_handler;
+
+ /*
+ * Clear subchannel ID and number to signal new kernel that no CCW or
+ * SCSI IPL has been done (for kexec and kdump)
+ */
+ S390_lowcore.subchannel_id = 0;
+ S390_lowcore.subchannel_nr = 0;
+
+ /* Store status at absolute zero */
+ store_status();
+
+ /* Call function before reset */
+ if (fn_pre)
+ fn_pre();
+ do_reset_calls();
+ /* Call function after reset */
+ if (fn_post)
+ fn_post(data);
+}
Code Review / kvmfornfv.git / blobdiff