/* * 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 <linux/ctype.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> #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" 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, }; #define DUMP_NONE_STR "none" #define DUMP_CCW_STR "ccw" #define DUMP_FCP_STR "fcp" 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_DEFAULT, }; enum dump_method { DUMP_METHOD_NONE, DUMP_METHOD_CCW_CIO, DUMP_METHOD_CCW_DIAG, DUMP_METHOD_CCW_VM, DUMP_METHOD_FCP_DIAG, }; 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: return NULL; } } 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 = REIPL_METHOD_DEFAULT; static struct ipl_parameter_block *reipl_block_fcp; static struct ipl_parameter_block *reipl_block_ccw; static char reipl_nss_name[NSS_NAME_SIZE + 1]; 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 enum shutdown_action on_panic_action = SHUTDOWN_STOP; static struct sclp_ipl_info sclp_ipl_info; int diag308(unsigned long subcode, void *addr) { register unsigned long _addr asm("0") = (unsigned long) addr; register unsigned long _rc asm("1") = 0; asm volatile( " diag %0,%2,0x308\n" "0:\n" EX_TABLE(0b,0b) : "+d" (_addr), "+d" (_rc) : "d" (subcode) : "cc", "memory"); return _rc; } EXPORT_SYMBOL_GPL(diag308); /* SYSFS */ #define DEFINE_IPL_ATTR_RO(_prefix, _name, _format, _value) \ static ssize_t sys_##_prefix##_##_name##_show(struct kset *kset, \ 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 kset *kset, \ char *page) \ { \ return sprintf(page, _fmt_out, \ (unsigned long long) _value); \ } \ static ssize_t sys_##_prefix##_##_name##_store(struct kset *kset, \ 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); #define DEFINE_IPL_ATTR_STR_RW(_prefix, _name, _fmt_out, _fmt_in, _value)\ static ssize_t sys_##_prefix##_##_name##_show(struct kset *kset, \ char *page) \ { \ return sprintf(page, _fmt_out, _value); \ } \ static ssize_t sys_##_prefix##_##_name##_store(struct kset *kset, \ const char *buf, size_t len) \ { \ if (sscanf(buf, _fmt_in, _value) != 1) \ return -EINVAL; \ 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 __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; } void __init setup_ipl_info(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; } } struct ipl_info ipl_info; EXPORT_SYMBOL_GPL(ipl_info); static ssize_t ipl_type_show(struct kset *kset, char *page) { return sprintf(page, "%s\n", ipl_type_str(ipl_info.type)); } static struct subsys_attribute sys_ipl_type_attr = __ATTR_RO(ipl_type); static ssize_t sys_ipl_device_show(struct kset *kset, 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 subsys_attribute sys_ipl_device_attr = __ATTR(device, S_IRUGO, sys_ipl_device_show, NULL); static ssize_t ipl_parameter_read(struct kobject *kobj, struct bin_attribute *attr, 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, }, .size = PAGE_SIZE, .read = &ipl_parameter_read, }; static ssize_t ipl_scp_data_read(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; 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, }, .size = PAGE_SIZE, .read = ipl_scp_data_read, }; /* FCP ipl device attributes */ DEFINE_IPL_ATTR_RO(ipl_fcp, wwpn, "0x%016llx\n", (unsigned long long) IPL_PARMBLOCK_START->ipl_info.fcp.wwpn); DEFINE_IPL_ATTR_RO(ipl_fcp, lun, "0x%016llx\n", (unsigned long long) IPL_PARMBLOCK_START->ipl_info.fcp.lun); DEFINE_IPL_ATTR_RO(ipl_fcp, bootprog, "%lld\n", (unsigned long long) IPL_PARMBLOCK_START->ipl_info.fcp.bootprog); DEFINE_IPL_ATTR_RO(ipl_fcp, br_lba, "%lld\n", (unsigned long long) IPL_PARMBLOCK_START->ipl_info.fcp.br_lba); static struct attribute *ipl_fcp_attrs[] = { &sys_ipl_type_attr.attr, &sys_ipl_device_attr.attr, &sys_ipl_fcp_wwpn_attr.attr, &sys_ipl_fcp_lun_attr.attr, &sys_ipl_fcp_bootprog_attr.attr, &sys_ipl_fcp_br_lba_attr.attr, NULL, }; static struct attribute_group ipl_fcp_attr_group = { .attrs = ipl_fcp_attrs, }; /* CCW ipl device attributes */ static ssize_t ipl_ccw_loadparm_show(struct kset *kset, 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); strstrip(loadparm); return sprintf(page, "%s\n", loadparm); } static struct subsys_attribute sys_ipl_ccw_loadparm_attr = __ATTR(loadparm, 0444, ipl_ccw_loadparm_show, NULL); static struct attribute *ipl_ccw_attrs[] = { &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 = { .attrs = ipl_ccw_attrs, }; /* 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, 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 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 void reipl_get_ascii_loadparm(char *loadparm) { memcpy(loadparm, &reipl_block_ccw->ipl_info.ccw.load_param, LOADPARM_LEN); EBCASC(loadparm, LOADPARM_LEN); loadparm[LOADPARM_LEN] = 0; strstrip(loadparm); } static ssize_t reipl_ccw_loadparm_show(struct kset *kset, char *page) { char buf[LOADPARM_LEN + 1]; reipl_get_ascii_loadparm(buf); return sprintf(page, "%s\n", buf); } static ssize_t reipl_ccw_loadparm_store(struct kset *kset, 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(&reipl_block_ccw->ipl_info.ccw.load_param, ' ', LOADPARM_LEN); /* copy and convert to ebcdic */ memcpy(&reipl_block_ccw->ipl_info.ccw.load_param, buf, lp_len); ASCEBC(reipl_block_ccw->ipl_info.ccw.load_param, LOADPARM_LEN); return len; } static struct subsys_attribute sys_reipl_ccw_loadparm_attr = __ATTR(loadparm, 0644, reipl_ccw_loadparm_show, reipl_ccw_loadparm_store); static struct attribute *reipl_ccw_attrs[] = { &sys_reipl_ccw_device_attr.attr, &sys_reipl_ccw_loadparm_attr.attr, NULL, }; static struct attribute_group reipl_ccw_attr_group = { .name = IPL_CCW_STR, .attrs = reipl_ccw_attrs, }; /* NSS reipl device attributes */ DEFINE_IPL_ATTR_STR_RW(reipl_nss, name, "%s\n", "%s\n", reipl_nss_name); static struct attribute *reipl_nss_attrs[] = { &sys_reipl_nss_name_attr.attr, NULL, }; static struct attribute_group reipl_nss_attr_group = { .name = IPL_NSS_STR, .attrs = reipl_nss_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 = REIPL_METHOD_CCW_VM; else reipl_method = REIPL_METHOD_CCW_CIO; 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; break; case IPL_TYPE_FCP_DUMP: reipl_method = REIPL_METHOD_FCP_DUMP; break; case IPL_TYPE_NSS: reipl_method = REIPL_METHOD_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 kset *kset, char *page) { return sprintf(page, "%s\n", ipl_type_str(reipl_type)); } static ssize_t reipl_type_store(struct kset *kset, 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 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 dump_type type) { if (!(dump_capabilities & type)) return -EINVAL; switch(type) { case DUMP_TYPE_CCW: 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 kset *kset, char *page) { return sprintf(page, "%s\n", dump_type_str(dump_type)); } static ssize_t dump_type_store(struct kset *kset, 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 subsys_attribute dump_type_attr = __ATTR(dump_type, 0644, dump_type_show, dump_type_store); static decl_subsys(dump, NULL, NULL); /* * Shutdown actions section */ static decl_subsys(shutdown_actions, NULL, NULL); /* on panic */ static ssize_t on_panic_show(struct kset *kset, char *page) { return sprintf(page, "%s\n", shutdown_action_str(on_panic_action)); } static ssize_t on_panic_store(struct kset *kset, 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); void do_reipl(void) { struct ccw_dev_id devid; static char buf[100]; char loadparm[LOADPARM_LEN + 1]; switch (reipl_method) { case REIPL_METHOD_CCW_CIO: devid.devno = reipl_block_ccw->ipl_info.ccw.devno; if (ipl_info.type == IPL_TYPE_CCW && devid.devno == ipl_devno) diag308(DIAG308_IPL, NULL); devid.ssid = 0; reipl_ccw_dev(&devid); break; case REIPL_METHOD_CCW_VM: reipl_get_ascii_loadparm(loadparm); if (strlen(loadparm) == 0) sprintf(buf, "IPL %X", reipl_block_ccw->ipl_info.ccw.devno); else sprintf(buf, "IPL %X LOADPARM '%s'", reipl_block_ccw->ipl_info.ccw.devno, loadparm); __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: sprintf(buf, "IPL %s", reipl_nss_name); __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: default: break; } signal_processor(smp_processor_id(), sigp_stop_and_store_status); } static void do_dump(void) { 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"); } /* init functions */ static int __init ipl_register_fcp_files(void) { int rc; rc = sysfs_create_group(&ipl_subsys.kobj, &ipl_fcp_attr_group); if (rc) goto out; rc = sysfs_create_bin_file(&ipl_subsys.kobj, &ipl_parameter_attr); if (rc) goto out_ipl_parm; rc = sysfs_create_bin_file(&ipl_subsys.kobj, &ipl_scp_data_attr); if (!rc) goto out; sysfs_remove_bin_file(&ipl_subsys.kobj, &ipl_parameter_attr); out_ipl_parm: sysfs_remove_group(&ipl_subsys.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_info.type) { case IPL_TYPE_CCW: rc = sysfs_create_group(&ipl_subsys.kobj, &ipl_ccw_attr_group); 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_subsys.kobj, &ipl_nss_attr_group); break; default: rc = sysfs_create_group(&ipl_subsys.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_nss_init(void) { int rc; if (!MACHINE_IS_VM) return 0; rc = sysfs_create_group(&reipl_subsys.kobj, &reipl_nss_attr_group); if (rc) return rc; strncpy(reipl_nss_name, kernel_nss_name, NSS_NAME_SIZE + 1); 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; rc = sysfs_create_group(&reipl_subsys.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 = IPL_PARM_BLK0_CCW_LEN; reipl_block_ccw->hdr.pbt = DIAG308_IPL_TYPE_CCW; /* check if read scp info worked and set loadparm */ if (sclp_ipl_info.is_valid) memcpy(reipl_block_ccw->ipl_info.ccw.load_param, &sclp_ipl_info.loadparm, LOADPARM_LEN); else /* read scp info failed: set empty loadparm (EBCDIC blanks) */ memset(reipl_block_ccw->ipl_info.ccw.load_param, 0x40, LOADPARM_LEN); /* FIXME: check for diag308_set_works when enabling diag ccw reipl */ if (!MACHINE_IS_VM) sys_reipl_ccw_loadparm_attr.attr.mode = S_IRUGO; if (ipl_info.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_info.type != IPL_TYPE_FCP)) return 0; if ((!diag308_set_works) && (ipl_info.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.kobj, &reipl_fcp_attr_group); if (rc) { free_page((unsigned long)reipl_block_fcp); return rc; } if (ipl_info.type == IPL_TYPE_FCP) { memcpy(reipl_block_fcp, IPL_PARMBLOCK_START, PAGE_SIZE); } else { reipl_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN; reipl_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION; reipl_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN; reipl_block_fcp->hdr.pbt = DIAG308_IPL_TYPE_FCP; reipl_block_fcp->ipl_info.fcp.opt = DIAG308_IPL_OPT_IPL; } reipl_capabilities |= IPL_TYPE_FCP; return 0; } static int __init reipl_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_nss_init(); if (rc) return rc; rc = reipl_set_type(ipl_info.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.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_subsys.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; } #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(DUMP_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; sclp_get_ipl_info(&sclp_ipl_info); 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); 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; } 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(); } u32 dump_prefix_page; void s390_reset_system(void) { 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_MCHECK; 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_MCHECK; S390_lowcore.program_new_psw.addr = PSW_ADDR_AMODE | (unsigned long) s390_base_pgm_handler; do_reset_calls(); }