| /* |
| * 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 DEFINE_IPL_ATTR_RO(_prefix, _name, _format, _value) \ |
| static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj, \ |
| struct kobj_attribute *attr, \ |
| char *page) \ |
| { \ |
| return sprintf(page, _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) \ |
| static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj, \ |
| struct kobj_attribute *attr, \ |
| char *page) \ |
| { \ |
| return sprintf(page, _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)\ |
| static ssize_t sys_##_prefix##_##_name##_show(struct kobject *kobj, \ |
| struct kobj_attribute *attr, \ |
| char *page) \ |
| { \ |
| return sprintf(page, _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 = { |
| .attr = { |
| .name = "binary_parameter", |
| .mode = S_IRUGO, |
| }, |
| .size = PAGE_SIZE, |
| .read = &ipl_parameter_read, |
| }; |
| |
| 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 = { |
| .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 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_ccw_attrs_vm[] = { |
| &sys_ipl_type_attr.attr, |
| &sys_ipl_device_attr.attr, |
| &sys_ipl_ccw_loadparm_attr.attr, |
| &sys_ipl_vm_parm_attr.attr, |
| NULL, |
| }; |
| |
| static struct attribute *ipl_ccw_attrs_lpar[] = { |
| &sys_ipl_type_attr.attr, |
| &sys_ipl_device_attr.attr, |
| &sys_ipl_ccw_loadparm_attr.attr, |
| NULL, |
| }; |
| |
| static struct attribute_group ipl_ccw_attr_group_vm = { |
| .attrs = ipl_ccw_attrs_vm, |
| }; |
| |
| static struct attribute_group ipl_ccw_attr_group_lpar = { |
| .attrs = ipl_ccw_attrs_lpar |
| }; |
| |
| /* NSS ipl device attributes */ |
| |
| DEFINE_IPL_ATTR_RO(ipl_nss, name, "%s\n", kernel_nss_name); |
| |
| static struct attribute *ipl_nss_attrs[] = { |
| &sys_ipl_type_attr.attr, |
| &sys_ipl_nss_name_attr.attr, |
| &sys_ipl_ccw_loadparm_attr.attr, |
| &sys_ipl_vm_parm_attr.attr, |
| NULL, |
| }; |
| |
| static struct attribute_group ipl_nss_attr_group = { |
| .attrs = ipl_nss_attrs, |
| }; |
| |
| /* UNKNOWN ipl device attributes */ |
| |
| static struct attribute *ipl_unknown_attrs[] = { |
| &sys_ipl_type_attr.attr, |
| NULL, |
| }; |
| |
| static struct attribute_group ipl_unknown_attr_group = { |
| .attrs = ipl_unknown_attrs, |
| }; |
| |
| static struct kset *ipl_kset; |
| |
| static int __init ipl_register_fcp_files(void) |
| { |
| int rc; |
| |
| rc = sysfs_create_group(&ipl_kset->kobj, &ipl_fcp_attr_group); |
| if (rc) |
| goto out; |
| rc = sysfs_create_bin_file(&ipl_kset->kobj, &ipl_parameter_attr); |
| if (rc) |
| goto out_ipl_parm; |
| rc = sysfs_create_bin_file(&ipl_kset->kobj, &ipl_scp_data_attr); |
| if (!rc) |
| goto out; |
| |
| sysfs_remove_bin_file(&ipl_kset->kobj, &ipl_parameter_attr); |
| |
| out_ipl_parm: |
| sysfs_remove_group(&ipl_kset->kobj, &ipl_fcp_attr_group); |
| out: |
| return rc; |
| } |
| |
| static void __ipl_run(void *unused) |
| { |
| diag308(DIAG308_IPL, NULL); |
| if (MACHINE_IS_VM) |
| __cpcmd("IPL", NULL, 0, NULL); |
| else if (ipl_info.type == IPL_TYPE_CCW) |
| reipl_ccw_dev(&ipl_info.data.ccw.dev_id); |
| } |
| |
| static void ipl_run(struct shutdown_trigger *trigger) |
| { |
| smp_call_ipl_cpu(__ipl_run, NULL); |
| } |
| |
| static int __init ipl_init(void) |
| { |
| int rc; |
| |
| ipl_kset = kset_create_and_add("ipl", NULL, firmware_kobj); |
| if (!ipl_kset) { |
| rc = -ENOMEM; |
| goto out; |
| } |
| switch (ipl_info.type) { |
| case IPL_TYPE_CCW: |
| if (MACHINE_IS_VM) |
| rc = sysfs_create_group(&ipl_kset->kobj, |
| &ipl_ccw_attr_group_vm); |
| else |
| rc = sysfs_create_group(&ipl_kset->kobj, |
| &ipl_ccw_attr_group_lpar); |
| break; |
| case IPL_TYPE_FCP: |
| case IPL_TYPE_FCP_DUMP: |
| rc = ipl_register_fcp_files(); |
| break; |
| case IPL_TYPE_NSS: |
| rc = sysfs_create_group(&ipl_kset->kobj, &ipl_nss_attr_group); |
| break; |
| default: |
| rc = sysfs_create_group(&ipl_kset->kobj, |
| &ipl_unknown_attr_group); |
| break; |
| } |
| out: |
| if (rc) |
| panic("ipl_init failed: rc = %i\n", rc); |
| |
| return 0; |
| } |
| |
| static struct shutdown_action __refdata ipl_action = { |
| .name = SHUTDOWN_ACTION_IPL_STR, |
| .fn = ipl_run, |
| .init = ipl_init, |
| }; |
| |
| /* |
| * reipl shutdown action: Reboot Linux on shutdown. |
| */ |
| |
| /* VM IPL PARM attributes */ |
| static ssize_t reipl_generic_vmparm_show(struct ipl_parameter_block *ipb, |
| char *page) |
| { |
| char vmparm[DIAG308_VMPARM_SIZE + 1] = {}; |
| |
| reipl_get_ascii_vmparm(vmparm, sizeof(vmparm), ipb); |
| return sprintf(page, "%s\n", vmparm); |
| } |
| |
| static ssize_t reipl_generic_vmparm_store(struct ipl_parameter_block *ipb, |
| size_t vmparm_max, |
| const char *buf, size_t len) |
| { |
| int i, ip_len; |
| |
| /* ignore trailing newline */ |
| ip_len = len; |
| if ((len > 0) && (buf[len - 1] == '\n')) |
| ip_len--; |
| |
| if (ip_len > vmparm_max) |
| return -EINVAL; |
| |
| /* parm is used to store kernel options, check for common chars */ |
| for (i = 0; i < ip_len; i++) |
| if (!(isalnum(buf[i]) || isascii(buf[i]) || isprint(buf[i]))) |
| return -EINVAL; |
| |
| memset(ipb->ipl_info.ccw.vm_parm, 0, DIAG308_VMPARM_SIZE); |
| ipb->ipl_info.ccw.vm_parm_len = ip_len; |
| if (ip_len > 0) { |
| ipb->ipl_info.ccw.vm_flags |= DIAG308_VM_FLAGS_VP_VALID; |
| memcpy(ipb->ipl_info.ccw.vm_parm, buf, ip_len); |
| ASCEBC(ipb->ipl_info.ccw.vm_parm, ip_len); |
| } else { |
| ipb->ipl_info.ccw.vm_flags &= ~DIAG308_VM_FLAGS_VP_VALID; |
| } |
| |
| return len; |
| } |
| |
| /* NSS wrapper */ |
| static ssize_t reipl_nss_vmparm_show(struct kobject *kobj, |
| struct kobj_attribute *attr, char *page) |
| { |
| return reipl_generic_vmparm_show(reipl_block_nss, page); |
| } |
| |
| static ssize_t reipl_nss_vmparm_store(struct kobject *kobj, |
| struct kobj_attribute *attr, |
| const char *buf, size_t len) |
| { |
| return reipl_generic_vmparm_store(reipl_block_nss, 56, buf, len); |
| } |
| |
| /* CCW wrapper */ |
| static ssize_t reipl_ccw_vmparm_show(struct kobject *kobj, |
| struct kobj_attribute *attr, char *page) |
| { |
| return reipl_generic_vmparm_show(reipl_block_ccw, page); |
| } |
| |
| static ssize_t reipl_ccw_vmparm_store(struct kobject *kobj, |
| struct kobj_attribute *attr, |
| const char *buf, size_t len) |
| { |
| return reipl_generic_vmparm_store(reipl_block_ccw, 64, buf, len); |
| } |
| |
| static struct kobj_attribute sys_reipl_nss_vmparm_attr = |
| __ATTR(parm, S_IRUGO | S_IWUSR, reipl_nss_vmparm_show, |
| reipl_nss_vmparm_store); |
| static struct kobj_attribute sys_reipl_ccw_vmparm_attr = |
| __ATTR(parm, S_IRUGO | S_IWUSR, reipl_ccw_vmparm_show, |
| reipl_ccw_vmparm_store); |
| |
| /* FCP reipl device attributes */ |
| |
| static ssize_t reipl_fcp_scpdata_read(struct file *filp, struct kobject *kobj, |
| struct bin_attribute *attr, |
| char *buf, loff_t off, size_t count) |
| { |
| size_t size = reipl_block_fcp->ipl_info.fcp.scp_data_len; |
| void *scp_data = reipl_block_fcp->ipl_info.fcp.scp_data; |
| |
| return memory_read_from_buffer(buf, count, &off, scp_data, size); |
| } |
| |
| static ssize_t reipl_fcp_scpdata_write(struct file *filp, struct kobject *kobj, |
| struct bin_attribute *attr, |
| char *buf, loff_t off, size_t count) |
| { |
| size_t padding; |
| size_t scpdata_len; |
| |
| if (off < 0) |
| return -EINVAL; |
| |
| if (off >= DIAG308_SCPDATA_SIZE) |
| return -ENOSPC; |
| |
| if (count > DIAG308_SCPDATA_SIZE - off) |
| count = DIAG308_SCPDATA_SIZE - off; |
| |
| memcpy(reipl_block_fcp->ipl_info.fcp.scp_data, buf + off, count); |
| scpdata_len = off + count; |
| |
| if (scpdata_len % 8) { |
| padding = 8 - (scpdata_len % 8); |
| memset(reipl_block_fcp->ipl_info.fcp.scp_data + scpdata_len, |
| 0, padding); |
| scpdata_len += padding; |
| } |
| |
| reipl_block_fcp->ipl_info.fcp.scp_data_len = scpdata_len; |
| reipl_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN + scpdata_len; |
| reipl_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN + scpdata_len; |
| |
| return count; |
| } |
| |
| static struct bin_attribute sys_reipl_fcp_scp_data_attr = { |
| .attr = { |
| .name = "scp_data", |
| .mode = S_IRUGO | S_IWUSR, |
| }, |
| .size = PAGE_SIZE, |
| .read = reipl_fcp_scpdata_read, |
| .write = reipl_fcp_scpdata_write, |
| }; |
| |
| DEFINE_IPL_ATTR_RW(reipl_fcp, wwpn, "0x%016llx\n", "%llx\n", |
| reipl_block_fcp->ipl_info.fcp.wwpn); |
| DEFINE_IPL_ATTR_RW(reipl_fcp, lun, "0x%016llx\n", "%llx\n", |
| reipl_block_fcp->ipl_info.fcp.lun); |
| DEFINE_IPL_ATTR_RW(reipl_fcp, bootprog, "%lld\n", "%lld\n", |
| reipl_block_fcp->ipl_info.fcp.bootprog); |
| DEFINE_IPL_ATTR_RW(reipl_fcp, br_lba, "%lld\n", "%lld\n", |
| reipl_block_fcp->ipl_info.fcp.br_lba); |
| DEFINE_IPL_ATTR_RW(reipl_fcp, device, "0.0.%04llx\n", "0.0.%llx\n", |
| reipl_block_fcp->ipl_info.fcp.devno); |
| |
| static struct attribute *reipl_fcp_attrs[] = { |
| &sys_reipl_fcp_device_attr.attr, |
| &sys_reipl_fcp_wwpn_attr.attr, |
| &sys_reipl_fcp_lun_attr.attr, |
| &sys_reipl_fcp_bootprog_attr.attr, |
| &sys_reipl_fcp_br_lba_attr.attr, |
| NULL, |
| }; |
| |
| static struct attribute_group reipl_fcp_attr_group = { |
| .attrs = reipl_fcp_attrs, |
| }; |
| |
| /* CCW reipl device attributes */ |
| |
| DEFINE_IPL_ATTR_RW(reipl_ccw, device, "0.0.%04llx\n", "0.0.%llx\n", |
| reipl_block_ccw->ipl_info.ccw.devno); |
| |
| static void reipl_get_ascii_loadparm(char *loadparm, |
| struct ipl_parameter_block *ibp) |
| { |
| memcpy(loadparm, ibp->ipl_info.ccw.load_parm, LOADPARM_LEN); |
| EBCASC(loadparm, LOADPARM_LEN); |
| loadparm[LOADPARM_LEN] = 0; |
| strim(loadparm); |
| } |
| |
| static ssize_t reipl_generic_loadparm_show(struct ipl_parameter_block *ipb, |
| char *page) |
| { |
| char buf[LOADPARM_LEN + 1]; |
| |
| reipl_get_ascii_loadparm(buf, ipb); |
| return sprintf(page, "%s\n", buf); |
| } |
| |
| static ssize_t reipl_generic_loadparm_store(struct ipl_parameter_block *ipb, |
| const char *buf, size_t len) |
| { |
| int i, lp_len; |
| |
| /* ignore trailing newline */ |
| lp_len = len; |
| if ((len > 0) && (buf[len - 1] == '\n')) |
| lp_len--; |
| /* loadparm can have max 8 characters and must not start with a blank */ |
| if ((lp_len > LOADPARM_LEN) || ((lp_len > 0) && (buf[0] == ' '))) |
| return -EINVAL; |
| /* loadparm can only contain "a-z,A-Z,0-9,SP,." */ |
| for (i = 0; i < lp_len; i++) { |
| if (isalpha(buf[i]) || isdigit(buf[i]) || (buf[i] == ' ') || |
| (buf[i] == '.')) |
| continue; |
| return -EINVAL; |
| } |
| /* initialize loadparm with blanks */ |
| memset(ipb->ipl_info.ccw.load_parm, ' ', LOADPARM_LEN); |
| /* copy and convert to ebcdic */ |
| memcpy(ipb->ipl_info.ccw.load_parm, buf, lp_len); |
| ASCEBC(ipb->ipl_info.ccw.load_parm, LOADPARM_LEN); |
| return len; |
| } |
| |
| /* NSS wrapper */ |
| static ssize_t reipl_nss_loadparm_show(struct kobject *kobj, |
| struct kobj_attribute *attr, char *page) |
| { |
| return reipl_generic_loadparm_show(reipl_block_nss, page); |
| } |
| |
| static ssize_t reipl_nss_loadparm_store(struct kobject *kobj, |
| struct kobj_attribute *attr, |
| const char *buf, size_t len) |
| { |
| return reipl_generic_loadparm_store(reipl_block_nss, buf, len); |
| } |
| |
| /* CCW wrapper */ |
| static ssize_t reipl_ccw_loadparm_show(struct kobject *kobj, |
| struct kobj_attribute *attr, char *page) |
| { |
| return reipl_generic_loadparm_show(reipl_block_ccw, page); |
| } |
| |
| static ssize_t reipl_ccw_loadparm_store(struct kobject *kobj, |
| struct kobj_attribute *attr, |
| const char *buf, size_t len) |
| { |
| return reipl_generic_loadparm_store(reipl_block_ccw, buf, len); |
| } |
| |
| static struct kobj_attribute sys_reipl_ccw_loadparm_attr = |
| __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_ccw_loadparm_show, |
| reipl_ccw_loadparm_store); |
| |
| static struct attribute *reipl_ccw_attrs_vm[] = { |
| &sys_reipl_ccw_device_attr.attr, |
| &sys_reipl_ccw_loadparm_attr.attr, |
| &sys_reipl_ccw_vmparm_attr.attr, |
| NULL, |
| }; |
| |
| static struct attribute *reipl_ccw_attrs_lpar[] = { |
| &sys_reipl_ccw_device_attr.attr, |
| &sys_reipl_ccw_loadparm_attr.attr, |
| NULL, |
| }; |
| |
| static struct attribute_group reipl_ccw_attr_group_vm = { |
| .name = IPL_CCW_STR, |
| .attrs = reipl_ccw_attrs_vm, |
| }; |
| |
| static struct attribute_group reipl_ccw_attr_group_lpar = { |
| .name = IPL_CCW_STR, |
| .attrs = reipl_ccw_attrs_lpar, |
| }; |
| |
| |
| /* NSS reipl device attributes */ |
| static void reipl_get_ascii_nss_name(char *dst, |
| struct ipl_parameter_block *ipb) |
| { |
| memcpy(dst, ipb->ipl_info.ccw.nss_name, NSS_NAME_SIZE); |
| EBCASC(dst, NSS_NAME_SIZE); |
| dst[NSS_NAME_SIZE] = 0; |
| } |
| |
| static ssize_t reipl_nss_name_show(struct kobject *kobj, |
| struct kobj_attribute *attr, char *page) |
| { |
| char nss_name[NSS_NAME_SIZE + 1] = {}; |
| |
| reipl_get_ascii_nss_name(nss_name, reipl_block_nss); |
| return sprintf(page, "%s\n", nss_name); |
| } |
| |
| static ssize_t reipl_nss_name_store(struct kobject *kobj, |
| struct kobj_attribute *attr, |
| const char *buf, size_t len) |
| { |
| int nss_len; |
| |
| /* ignore trailing newline */ |
| nss_len = len; |
| if ((len > 0) && (buf[len - 1] == '\n')) |
| nss_len--; |
| |
| if (nss_len > NSS_NAME_SIZE) |
| return -EINVAL; |
| |
| memset(reipl_block_nss->ipl_info.ccw.nss_name, 0x40, NSS_NAME_SIZE); |
| if (nss_len > 0) { |
| reipl_block_nss->ipl_info.ccw.vm_flags |= |
| DIAG308_VM_FLAGS_NSS_VALID; |
| memcpy(reipl_block_nss->ipl_info.ccw.nss_name, buf, nss_len); |
| ASCEBC(reipl_block_nss->ipl_info.ccw.nss_name, nss_len); |
| EBC_TOUPPER(reipl_block_nss->ipl_info.ccw.nss_name, nss_len); |
| } else { |
| reipl_block_nss->ipl_info.ccw.vm_flags &= |
| ~DIAG308_VM_FLAGS_NSS_VALID; |
| } |
| |
| return len; |
| } |
| |
| static struct kobj_attribute sys_reipl_nss_name_attr = |
| __ATTR(name, S_IRUGO | S_IWUSR, reipl_nss_name_show, |
| reipl_nss_name_store); |
| |
| static struct kobj_attribute sys_reipl_nss_loadparm_attr = |
| __ATTR(loadparm, S_IRUGO | S_IWUSR, reipl_nss_loadparm_show, |
| reipl_nss_loadparm_store); |
| |
| static struct attribute *reipl_nss_attrs[] = { |
| &sys_reipl_nss_name_attr.attr, |
| &sys_reipl_nss_loadparm_attr.attr, |
| &sys_reipl_nss_vmparm_attr.attr, |
| NULL, |
| }; |
| |
| static struct attribute_group reipl_nss_attr_group = { |
| .name = IPL_NSS_STR, |
| .attrs = reipl_nss_attrs, |
| }; |
| |
| static void set_reipl_block_actual(struct ipl_parameter_block *reipl_block) |
| { |
| reipl_block_actual = reipl_block; |
| os_info_entry_add(OS_INFO_REIPL_BLOCK, reipl_block_actual, |
| reipl_block->hdr.len); |
| } |
| |
| /* reipl type */ |
| |
| static int reipl_set_type(enum ipl_type type) |
| { |
| if (!(reipl_capabilities & type)) |
| return -EINVAL; |
| |
| switch(type) { |
| case IPL_TYPE_CCW: |
| if (diag308_set_works) |
| reipl_method = REIPL_METHOD_CCW_DIAG; |
| else if (MACHINE_IS_VM) |
| reipl_method = REIPL_METHOD_CCW_VM; |
| else |
| reipl_method = REIPL_METHOD_CCW_CIO; |
| set_reipl_block_actual(reipl_block_ccw); |
| break; |
| case IPL_TYPE_FCP: |
| if (diag308_set_works) |
| reipl_method = REIPL_METHOD_FCP_RW_DIAG; |
| else if (MACHINE_IS_VM) |
| reipl_method = REIPL_METHOD_FCP_RO_VM; |
| else |
| reipl_method = REIPL_METHOD_FCP_RO_DIAG; |
| set_reipl_block_actual(reipl_block_fcp); |
| break; |
| case IPL_TYPE_FCP_DUMP: |
| reipl_method = REIPL_METHOD_FCP_DUMP; |
| break; |
| case IPL_TYPE_NSS: |
| if (diag308_set_works) |
| reipl_method = REIPL_METHOD_NSS_DIAG; |
| else |
| reipl_method = REIPL_METHOD_NSS; |
| set_reipl_block_actual(reipl_block_nss); |
| break; |
| case IPL_TYPE_UNKNOWN: |
| reipl_method = REIPL_METHOD_DEFAULT; |
| break; |
| default: |
| BUG(); |
| } |
| reipl_type = type; |
| return 0; |
| } |
| |
| static ssize_t reipl_type_show(struct kobject *kobj, |
| struct kobj_attribute *attr, char *page) |
| { |
| return sprintf(page, "%s\n", ipl_type_str(reipl_type)); |
| } |
| |
| static ssize_t reipl_type_store(struct kobject *kobj, |
| struct kobj_attribute *attr, |
| const char *buf, size_t len) |
| { |
| int rc = -EINVAL; |
| |
| if (strncmp(buf, IPL_CCW_STR, strlen(IPL_CCW_STR)) == 0) |
| rc = reipl_set_type(IPL_TYPE_CCW); |
| else if (strncmp(buf, IPL_FCP_STR, strlen(IPL_FCP_STR)) == 0) |
| rc = reipl_set_type(IPL_TYPE_FCP); |
| else if (strncmp(buf, IPL_NSS_STR, strlen(IPL_NSS_STR)) == 0) |
| rc = reipl_set_type(IPL_TYPE_NSS); |
| return (rc != 0) ? rc : len; |
| } |
| |
| static struct kobj_attribute reipl_type_attr = |
| __ATTR(reipl_type, 0644, reipl_type_show, reipl_type_store); |
| |
| static struct kset *reipl_kset; |
| static struct kset *reipl_fcp_kset; |
| |
| static void get_ipl_string(char *dst, struct ipl_parameter_block *ipb, |
| const enum ipl_method m) |
| { |
| char loadparm[LOADPARM_LEN + 1] = {}; |
| char vmparm[DIAG308_VMPARM_SIZE + 1] = {}; |
| char nss_name[NSS_NAME_SIZE + 1] = {}; |
| size_t pos = 0; |
| |
| reipl_get_ascii_loadparm(loadparm, ipb); |
| reipl_get_ascii_nss_name(nss_name, ipb); |
| reipl_get_ascii_vmparm(vmparm, sizeof(vmparm), ipb); |
| |
| switch (m) { |
| case REIPL_METHOD_CCW_VM: |
| pos = sprintf(dst, "IPL %X CLEAR", ipb->ipl_info.ccw.devno); |
| break; |
| case REIPL_METHOD_NSS: |
| pos = sprintf(dst, "IPL %s", nss_name); |
| break; |
| default: |
| break; |
| } |
| if (strlen(loadparm) > 0) |
| pos += sprintf(dst + pos, " LOADPARM '%s'", loadparm); |
| if (strlen(vmparm) > 0) |
| sprintf(dst + pos, " PARM %s", vmparm); |
| } |
| |
| static void __reipl_run(void *unused) |
| { |
| struct ccw_dev_id devid; |
| static char buf[128]; |
| |
| switch (reipl_method) { |
| case REIPL_METHOD_CCW_CIO: |
| devid.devno = reipl_block_ccw->ipl_info.ccw.devno; |
| devid.ssid = 0; |
| reipl_ccw_dev(&devid); |
| break; |
| case REIPL_METHOD_CCW_VM: |
| get_ipl_string(buf, reipl_block_ccw, REIPL_METHOD_CCW_VM); |
| __cpcmd(buf, NULL, 0, NULL); |
| break; |
| case REIPL_METHOD_CCW_DIAG: |
| diag308(DIAG308_SET, reipl_block_ccw); |
| diag308(DIAG308_IPL, NULL); |
| break; |
| case REIPL_METHOD_FCP_RW_DIAG: |
| diag308(DIAG308_SET, reipl_block_fcp); |
| diag308(DIAG308_IPL, NULL); |
| break; |
| case REIPL_METHOD_FCP_RO_DIAG: |
| diag308(DIAG308_IPL, NULL); |
| break; |
| case REIPL_METHOD_FCP_RO_VM: |
| __cpcmd("IPL", NULL, 0, NULL); |
| break; |
| case REIPL_METHOD_NSS_DIAG: |
| diag308(DIAG308_SET, reipl_block_nss); |
| diag308(DIAG308_IPL, NULL); |
| break; |
| case REIPL_METHOD_NSS: |
| get_ipl_string(buf, reipl_block_nss, REIPL_METHOD_NSS); |
| __cpcmd(buf, NULL, 0, NULL); |
| break; |
| case REIPL_METHOD_DEFAULT: |
| if (MACHINE_IS_VM) |
| __cpcmd("IPL", NULL, 0, NULL); |
| diag308(DIAG308_IPL, NULL); |
| break; |
| case REIPL_METHOD_FCP_DUMP: |
| break; |
| } |
| disabled_wait((unsigned long) __builtin_return_address(0)); |
| } |
| |
| static void reipl_run(struct shutdown_trigger *trigger) |
| { |
| smp_call_ipl_cpu(__reipl_run, NULL); |
| } |
| |
| static void reipl_block_ccw_init(struct ipl_parameter_block *ipb) |
| { |
| ipb->hdr.len = IPL_PARM_BLK_CCW_LEN; |
| ipb->hdr.version = IPL_PARM_BLOCK_VERSION; |
| ipb->hdr.blk0_len = IPL_PARM_BLK0_CCW_LEN; |
| ipb->hdr.pbt = DIAG308_IPL_TYPE_CCW; |
| } |
| |
| static void reipl_block_ccw_fill_parms(struct ipl_parameter_block *ipb) |
| { |
| /* LOADPARM */ |
| /* check if read scp info worked and set loadparm */ |
| if (sclp_ipl_info.is_valid) |
| memcpy(ipb->ipl_info.ccw.load_parm, |
| &sclp_ipl_info.loadparm, LOADPARM_LEN); |
| else |
| /* read scp info failed: set empty loadparm (EBCDIC blanks) */ |
| memset(ipb->ipl_info.ccw.load_parm, 0x40, LOADPARM_LEN); |
| ipb->hdr.flags = DIAG308_FLAGS_LP_VALID; |
| |
| /* VM PARM */ |
| if (MACHINE_IS_VM && diag308_set_works && |
| (ipl_block.ipl_info.ccw.vm_flags & DIAG308_VM_FLAGS_VP_VALID)) { |
| |
| ipb->ipl_info.ccw.vm_flags |= DIAG308_VM_FLAGS_VP_VALID; |
| ipb->ipl_info.ccw.vm_parm_len = |
| ipl_block.ipl_info.ccw.vm_parm_len; |
| memcpy(ipb->ipl_info.ccw.vm_parm, |
| ipl_block.ipl_info.ccw.vm_parm, DIAG308_VMPARM_SIZE); |
| } |
| } |
| |
| static int __init reipl_nss_init(void) |
| { |
| int rc; |
| |
| if (!MACHINE_IS_VM) |
| return 0; |
| |
| reipl_block_nss = (void *) get_zeroed_page(GFP_KERNEL); |
| if (!reipl_block_nss) |
| return -ENOMEM; |
| |
| if (!diag308_set_works) |
| sys_reipl_nss_vmparm_attr.attr.mode = S_IRUGO; |
| |
| rc = sysfs_create_group(&reipl_kset->kobj, &reipl_nss_attr_group); |
| if (rc) |
| return rc; |
| |
| reipl_block_ccw_init(reipl_block_nss); |
| if (ipl_info.type == IPL_TYPE_NSS) { |
| memset(reipl_block_nss->ipl_info.ccw.nss_name, |
| ' ', NSS_NAME_SIZE); |
| memcpy(reipl_block_nss->ipl_info.ccw.nss_name, |
| kernel_nss_name, strlen(kernel_nss_name)); |
| ASCEBC(reipl_block_nss->ipl_info.ccw.nss_name, NSS_NAME_SIZE); |
| reipl_block_nss->ipl_info.ccw.vm_flags |= |
| DIAG308_VM_FLAGS_NSS_VALID; |
| |
| reipl_block_ccw_fill_parms(reipl_block_nss); |
| } |
| |
| reipl_capabilities |= IPL_TYPE_NSS; |
| return 0; |
| } |
| |
| static int __init reipl_ccw_init(void) |
| { |
| int rc; |
| |
| reipl_block_ccw = (void *) get_zeroed_page(GFP_KERNEL); |
| if (!reipl_block_ccw) |
| return -ENOMEM; |
| |
| if (MACHINE_IS_VM) { |
| if (!diag308_set_works) |
| sys_reipl_ccw_vmparm_attr.attr.mode = S_IRUGO; |
| rc = sysfs_create_group(&reipl_kset->kobj, |
| &reipl_ccw_attr_group_vm); |
| } else { |
| if(!diag308_set_works) |
| sys_reipl_ccw_loadparm_attr.attr.mode = S_IRUGO; |
| rc = sysfs_create_group(&reipl_kset->kobj, |
| &reipl_ccw_attr_group_lpar); |
| } |
| if (rc) |
| return rc; |
| |
| reipl_block_ccw_init(reipl_block_ccw); |
| if (ipl_info.type == IPL_TYPE_CCW) { |
| reipl_block_ccw->ipl_info.ccw.devno = ipl_devno; |
| reipl_block_ccw_fill_parms(reipl_block_ccw); |
| } |
| |
| reipl_capabilities |= IPL_TYPE_CCW; |
| return 0; |
| } |
| |
| static int __init reipl_fcp_init(void) |
| { |
| int rc; |
| |
| if (!diag308_set_works) { |
| if (ipl_info.type == IPL_TYPE_FCP) { |
| make_attrs_ro(reipl_fcp_attrs); |
| sys_reipl_fcp_scp_data_attr.attr.mode = S_IRUGO; |
| } else |
| return 0; |
| } |
| |
| reipl_block_fcp = (void *) get_zeroed_page(GFP_KERNEL); |
| if (!reipl_block_fcp) |
| return -ENOMEM; |
| |
| /* sysfs: create fcp kset for mixing attr group and bin attrs */ |
| reipl_fcp_kset = kset_create_and_add(IPL_FCP_STR, NULL, |
| &reipl_kset->kobj); |
| if (!reipl_fcp_kset) { |
| free_page((unsigned long) reipl_block_fcp); |
| return -ENOMEM; |
| } |
| |
| rc = sysfs_create_group(&reipl_fcp_kset->kobj, &reipl_fcp_attr_group); |
| if (rc) { |
| kset_unregister(reipl_fcp_kset); |
| free_page((unsigned long) reipl_block_fcp); |
| return rc; |
| } |
| |
| rc = sysfs_create_bin_file(&reipl_fcp_kset->kobj, |
| &sys_reipl_fcp_scp_data_attr); |
| if (rc) { |
| sysfs_remove_group(&reipl_fcp_kset->kobj, &reipl_fcp_attr_group); |
| kset_unregister(reipl_fcp_kset); |
| free_page((unsigned long) reipl_block_fcp); |
| return rc; |
| } |
| |
| if (ipl_info.type == IPL_TYPE_FCP) |
| memcpy(reipl_block_fcp, IPL_PARMBLOCK_START, PAGE_SIZE); |
| else { |
| reipl_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN; |
| reipl_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION; |
| reipl_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN; |
| reipl_block_fcp->hdr.pbt = DIAG308_IPL_TYPE_FCP; |
| reipl_block_fcp->ipl_info.fcp.opt = DIAG308_IPL_OPT_IPL; |
| } |
| reipl_capabilities |= IPL_TYPE_FCP; |
| return 0; |
| } |
| |
| static int __init reipl_type_init(void) |
| { |
| enum ipl_type reipl_type = ipl_info.type; |
| struct ipl_parameter_block *reipl_block; |
| unsigned long size; |
| |
| reipl_block = os_info_old_entry(OS_INFO_REIPL_BLOCK, &size); |
| if (!reipl_block) |
| goto out; |
| /* |
| * If we have an OS info reipl block, this will be used |
| */ |
| if (reipl_block->hdr.pbt == DIAG308_IPL_TYPE_FCP) { |
| memcpy(reipl_block_fcp, reipl_block, size); |
| reipl_type = IPL_TYPE_FCP; |
| } else if (reipl_block->hdr.pbt == DIAG308_IPL_TYPE_CCW) { |
| memcpy(reipl_block_ccw, reipl_block, size); |
| reipl_type = IPL_TYPE_CCW; |
| } |
| out: |
| return reipl_set_type(reipl_type); |
| } |
| |
| static int __init reipl_init(void) |
| { |
| int rc; |
| |
| reipl_kset = kset_create_and_add("reipl", NULL, firmware_kobj); |
| if (!reipl_kset) |
| return -ENOMEM; |
| rc = sysfs_create_file(&reipl_kset->kobj, &reipl_type_attr.attr); |
| if (rc) { |
| kset_unregister(reipl_kset); |
| return rc; |
| } |
| rc = reipl_ccw_init(); |
| if (rc) |
| return rc; |
| rc = reipl_fcp_init(); |
| if (rc) |
| return rc; |
| rc = reipl_nss_init(); |
| if (rc) |
| return rc; |
| return reipl_type_init(); |
| } |
| |
| static struct shutdown_action __refdata reipl_action = { |
| .name = SHUTDOWN_ACTION_REIPL_STR, |
| .fn = reipl_run, |
| .init = reipl_init, |
| }; |
| |
| /* |
| * dump shutdown action: Dump Linux on shutdown. |
| */ |
| |
| /* FCP dump device attributes */ |
| |
| DEFINE_IPL_ATTR_RW(dump_fcp, wwpn, "0x%016llx\n", "%llx\n", |
| dump_block_fcp->ipl_info.fcp.wwpn); |
| DEFINE_IPL_ATTR_RW(dump_fcp, lun, "0x%016llx\n", "%llx\n", |
| dump_block_fcp->ipl_info.fcp.lun); |
| DEFINE_IPL_ATTR_RW(dump_fcp, bootprog, "%lld\n", "%lld\n", |
| dump_block_fcp->ipl_info.fcp.bootprog); |
| DEFINE_IPL_ATTR_RW(dump_fcp, br_lba, "%lld\n", "%lld\n", |
| dump_block_fcp->ipl_info.fcp.br_lba); |
| DEFINE_IPL_ATTR_RW(dump_fcp, device, "0.0.%04llx\n", "0.0.%llx\n", |
| dump_block_fcp->ipl_info.fcp.devno); |
| |
| static struct attribute *dump_fcp_attrs[] = { |
| &sys_dump_fcp_device_attr.attr, |
| &sys_dump_fcp_wwpn_attr.attr, |
| &sys_dump_fcp_lun_attr.attr, |
| &sys_dump_fcp_bootprog_attr.attr, |
| &sys_dump_fcp_br_lba_attr.attr, |
| NULL, |
| }; |
| |
| static struct attribute_group dump_fcp_attr_group = { |
| .name = IPL_FCP_STR, |
| .attrs = dump_fcp_attrs, |
| }; |
| |
| /* CCW dump device attributes */ |
| |
| DEFINE_IPL_ATTR_RW(dump_ccw, device, "0.0.%04llx\n", "0.0.%llx\n", |
| dump_block_ccw->ipl_info.ccw.devno); |
| |
| static struct attribute *dump_ccw_attrs[] = { |
| &sys_dump_ccw_device_attr.attr, |
| NULL, |
| }; |
| |
| static struct attribute_group dump_ccw_attr_group = { |
| .name = IPL_CCW_STR, |
| .attrs = dump_ccw_attrs, |
| }; |
| |
| /* dump type */ |
| |
| static int dump_set_type(enum dump_type type) |
| { |
| if (!(dump_capabilities & type)) |
| return -EINVAL; |
| switch (type) { |
| case DUMP_TYPE_CCW: |
| if (diag308_set_works) |
| dump_method = DUMP_METHOD_CCW_DIAG; |
| else if (MACHINE_IS_VM) |
| dump_method = DUMP_METHOD_CCW_VM; |
| else |
| dump_method = DUMP_METHOD_CCW_CIO; |
| break; |
| case DUMP_TYPE_FCP: |
| dump_method = DUMP_METHOD_FCP_DIAG; |
| break; |
| default: |
| dump_method = DUMP_METHOD_NONE; |
| } |
| dump_type = type; |
| return 0; |
| } |
| |
| static ssize_t dump_type_show(struct kobject *kobj, |
| struct kobj_attribute *attr, char *page) |
| { |
| return sprintf(page, "%s\n", dump_type_str(dump_type)); |
| } |
| |
| static ssize_t dump_type_store(struct kobject *kobj, |
| struct kobj_attribute *attr, |
| const char *buf, size_t len) |
| { |
| int rc = -EINVAL; |
| |
| if (strncmp(buf, DUMP_NONE_STR, strlen(DUMP_NONE_STR)) == 0) |
| rc = dump_set_type(DUMP_TYPE_NONE); |
| else if (strncmp(buf, DUMP_CCW_STR, strlen(DUMP_CCW_STR)) == 0) |
| rc = dump_set_type(DUMP_TYPE_CCW); |
| else if (strncmp(buf, DUMP_FCP_STR, strlen(DUMP_FCP_STR)) == 0) |
| rc = dump_set_type(DUMP_TYPE_FCP); |
| return (rc != 0) ? rc : len; |
| } |
| |
| static struct kobj_attribute dump_type_attr = |
| __ATTR(dump_type, 0644, dump_type_show, dump_type_store); |
| |
| static struct kset *dump_kset; |
| |
| static void diag308_dump(void *dump_block) |
| { |
| diag308(DIAG308_SET, dump_block); |
| while (1) { |
| if (diag308(DIAG308_DUMP, NULL) != 0x302) |
| break; |
| udelay_simple(USEC_PER_SEC); |
| } |
| } |
| |
| static void __dump_run(void *unused) |
| { |
| struct ccw_dev_id devid; |
| static char buf[100]; |
| |
| switch (dump_method) { |
| case DUMP_METHOD_CCW_CIO: |
| devid.devno = dump_block_ccw->ipl_info.ccw.devno; |
| devid.ssid = 0; |
| reipl_ccw_dev(&devid); |
| break; |
| case DUMP_METHOD_CCW_VM: |
| sprintf(buf, "STORE STATUS"); |
| __cpcmd(buf, NULL, 0, NULL); |
| sprintf(buf, "IPL %X", dump_block_ccw->ipl_info.ccw.devno); |
| __cpcmd(buf, NULL, 0, NULL); |
| break; |
| case DUMP_METHOD_CCW_DIAG: |
| diag308_dump(dump_block_ccw); |
| break; |
| case DUMP_METHOD_FCP_DIAG: |
| diag308_dump(dump_block_fcp); |
| break; |
| default: |
| break; |
| } |
| } |
| |
| static void dump_run(struct shutdown_trigger *trigger) |
| { |
| if (dump_method == DUMP_METHOD_NONE) |
| return; |
| smp_send_stop(); |
| smp_call_ipl_cpu(__dump_run, NULL); |
| } |
| |
| static int __init dump_ccw_init(void) |
| { |
| int rc; |
| |
| dump_block_ccw = (void *) get_zeroed_page(GFP_KERNEL); |
| if (!dump_block_ccw) |
| return -ENOMEM; |
| rc = sysfs_create_group(&dump_kset->kobj, &dump_ccw_attr_group); |
| if (rc) { |
| free_page((unsigned long)dump_block_ccw); |
| return rc; |
| } |
| dump_block_ccw->hdr.len = IPL_PARM_BLK_CCW_LEN; |
| dump_block_ccw->hdr.version = IPL_PARM_BLOCK_VERSION; |
| dump_block_ccw->hdr.blk0_len = IPL_PARM_BLK0_CCW_LEN; |
| dump_block_ccw->hdr.pbt = DIAG308_IPL_TYPE_CCW; |
| dump_capabilities |= DUMP_TYPE_CCW; |
| return 0; |
| } |
| |
| static int __init dump_fcp_init(void) |
| { |
| int rc; |
| |
| if (!sclp_ipl_info.has_dump) |
| return 0; /* LDIPL DUMP is not installed */ |
| if (!diag308_set_works) |
| return 0; |
| dump_block_fcp = (void *) get_zeroed_page(GFP_KERNEL); |
| if (!dump_block_fcp) |
| return -ENOMEM; |
| rc = sysfs_create_group(&dump_kset->kobj, &dump_fcp_attr_group); |
| if (rc) { |
| free_page((unsigned long)dump_block_fcp); |
| return rc; |
| } |
| dump_block_fcp->hdr.len = IPL_PARM_BLK_FCP_LEN; |
| dump_block_fcp->hdr.version = IPL_PARM_BLOCK_VERSION; |
| dump_block_fcp->hdr.blk0_len = IPL_PARM_BLK0_FCP_LEN; |
| dump_block_fcp->hdr.pbt = DIAG308_IPL_TYPE_FCP; |
| dump_block_fcp->ipl_info.fcp.opt = DIAG308_IPL_OPT_DUMP; |
| dump_capabilities |= DUMP_TYPE_FCP; |
| return 0; |
| } |
| |
| static int __init dump_init(void) |
| { |
| int rc; |
| |
| dump_kset = kset_create_and_add("dump", NULL, firmware_kobj); |
| if (!dump_kset) |
| return -ENOMEM; |
| rc = sysfs_create_file(&dump_kset->kobj, &dump_type_attr.attr); |
| if (rc) { |
| kset_unregister(dump_kset); |
| return rc; |
| } |
| rc = dump_ccw_init(); |
| if (rc) |
| return rc; |
| rc = dump_fcp_init(); |
| if (rc) |
| return rc; |
| dump_set_type(DUMP_TYPE_NONE); |
| return 0; |
| } |
| |
| static struct shutdown_action __refdata dump_action = { |
| .name = SHUTDOWN_ACTION_DUMP_STR, |
| .fn = dump_run, |
| .init = dump_init, |
| }; |
| |
| static void dump_reipl_run(struct shutdown_trigger *trigger) |
| { |
| unsigned long ipib = (unsigned long) reipl_block_actual; |
| unsigned int csum; |
| |
| csum = csum_partial(reipl_block_actual, reipl_block_actual->hdr.len, 0); |
| mem_assign_absolute(S390_lowcore.ipib, ipib); |
| mem_assign_absolute(S390_lowcore.ipib_checksum, csum); |
| dump_run(trigger); |
| } |
| |
| static int __init dump_reipl_init(void) |
| { |
| if (!diag308_set_works) |
| return -EOPNOTSUPP; |
| else |
| return 0; |
| } |
| |
| static struct shutdown_action __refdata dump_reipl_action = { |
| .name = SHUTDOWN_ACTION_DUMP_REIPL_STR, |
| .fn = dump_reipl_run, |
| .init = dump_reipl_init, |
| }; |
| |
| /* |
| * vmcmd shutdown action: Trigger vm command on shutdown. |
| */ |
| |
| static char vmcmd_on_reboot[128]; |
| static char vmcmd_on_panic[128]; |
| static char vmcmd_on_halt[128]; |
| static char vmcmd_on_poff[128]; |
| static char vmcmd_on_restart[128]; |
| |
| DEFINE_IPL_ATTR_STR_RW(vmcmd, on_reboot, "%s\n", "%s\n", vmcmd_on_reboot); |
| DEFINE_IPL_ATTR_STR_RW(vmcmd, on_panic, "%s\n", "%s\n", vmcmd_on_panic); |
| DEFINE_IPL_ATTR_STR_RW(vmcmd, on_halt, "%s\n", "%s\n", vmcmd_on_halt); |
| DEFINE_IPL_ATTR_STR_RW(vmcmd, on_poff, "%s\n", "%s\n", vmcmd_on_poff); |
| DEFINE_IPL_ATTR_STR_RW(vmcmd, on_restart, "%s\n", "%s\n", vmcmd_on_restart); |
| |
| static struct attribute *vmcmd_attrs[] = { |
| &sys_vmcmd_on_reboot_attr.attr, |
| &sys_vmcmd_on_panic_attr.attr, |
| &sys_vmcmd_on_halt_attr.attr, |
| &sys_vmcmd_on_poff_attr.attr, |
| &sys_vmcmd_on_restart_attr.attr, |
| NULL, |
| }; |
| |
| static struct attribute_group vmcmd_attr_group = { |
| .attrs = vmcmd_attrs, |
| }; |
| |
| static struct kset *vmcmd_kset; |
| |
| static void vmcmd_run(struct shutdown_trigger *trigger) |
| { |
| char *cmd; |
| |
| if (strcmp(trigger->name, ON_REIPL_STR) == 0) |
| cmd = vmcmd_on_reboot; |
| else if (strcmp(trigger->name, ON_PANIC_STR) == 0) |
| cmd = vmcmd_on_panic; |
| else if (strcmp(trigger->name, ON_HALT_STR) == 0) |
| cmd = vmcmd_on_halt; |
| else if (strcmp(trigger->name, ON_POFF_STR) == 0) |
| cmd = vmcmd_on_poff; |
| else if (strcmp(trigger->name, ON_RESTART_STR) == 0) |
| cmd = vmcmd_on_restart; |
| else |
| return; |
| |
| if (strlen(cmd) == 0) |
| return; |
| __cpcmd(cmd, NULL, 0, NULL); |
| } |
| |
| static int vmcmd_init(void) |
| { |
| if (!MACHINE_IS_VM) |
| return -EOPNOTSUPP; |
| vmcmd_kset = kset_create_and_add("vmcmd", NULL, firmware_kobj); |
| if (!vmcmd_kset) |
| return -ENOMEM; |
| return sysfs_create_group(&vmcmd_kset->kobj, &vmcmd_attr_group); |
| } |
| |
| static struct shutdown_action vmcmd_action = {SHUTDOWN_ACTION_VMCMD_STR, |
| vmcmd_run, vmcmd_init}; |
| |
| /* |
| * stop shutdown action: Stop Linux on shutdown. |
| */ |
| |
| static void stop_run(struct shutdown_trigger *trigger) |
| { |
| if (strcmp(trigger->name, ON_PANIC_STR) == 0 || |
| strcmp(trigger->name, ON_RESTART_STR) == 0) |
| disabled_wait((unsigned long) __builtin_return_address(0)); |
| smp_stop_cpu(); |
| } |
| |
| static struct shutdown_action stop_action = {SHUTDOWN_ACTION_STOP_STR, |
| stop_run, NULL}; |
| |
| /* action list */ |
| |
| static struct shutdown_action *shutdown_actions_list[] = { |
| &ipl_action, &reipl_action, &dump_reipl_action, &dump_action, |
| &vmcmd_action, &stop_action}; |
| #define SHUTDOWN_ACTIONS_COUNT (sizeof(shutdown_actions_list) / sizeof(void *)) |
| |
| /* |
| * Trigger section |
| */ |
| |
| static struct kset *shutdown_actions_kset; |
| |
| static int set_trigger(const char *buf, struct shutdown_trigger *trigger, |
| size_t len) |
| { |
| int i; |
| |
| for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) { |
| if (sysfs_streq(buf, shutdown_actions_list[i]->name)) { |
| if (shutdown_actions_list[i]->init_rc) { |
| return shutdown_actions_list[i]->init_rc; |
| } else { |
| trigger->action = shutdown_actions_list[i]; |
| return len; |
| } |
| } |
| } |
| return -EINVAL; |
| } |
| |
| /* on reipl */ |
| |
| static struct shutdown_trigger on_reboot_trigger = {ON_REIPL_STR, |
| &reipl_action}; |
| |
| static ssize_t on_reboot_show(struct kobject *kobj, |
| struct kobj_attribute *attr, char *page) |
| { |
| return sprintf(page, "%s\n", on_reboot_trigger.action->name); |
| } |
| |
| static ssize_t on_reboot_store(struct kobject *kobj, |
| struct kobj_attribute *attr, |
| const char *buf, size_t len) |
| { |
| return set_trigger(buf, &on_reboot_trigger, len); |
| } |
| |
| static struct kobj_attribute on_reboot_attr = |
| __ATTR(on_reboot, 0644, on_reboot_show, on_reboot_store); |
| |
| static void do_machine_restart(char *__unused) |
| { |
| smp_send_stop(); |
| on_reboot_trigger.action->fn(&on_reboot_trigger); |
| reipl_run(NULL); |
| } |
| void (*_machine_restart)(char *command) = do_machine_restart; |
| |
| /* on panic */ |
| |
| static struct shutdown_trigger on_panic_trigger = {ON_PANIC_STR, &stop_action}; |
| |
| static ssize_t on_panic_show(struct kobject *kobj, |
| struct kobj_attribute *attr, char *page) |
| { |
| return sprintf(page, "%s\n", on_panic_trigger.action->name); |
| } |
| |
| static ssize_t on_panic_store(struct kobject *kobj, |
| struct kobj_attribute *attr, |
| const char *buf, size_t len) |
| { |
| return set_trigger(buf, &on_panic_trigger, len); |
| } |
| |
| static struct kobj_attribute on_panic_attr = |
| __ATTR(on_panic, 0644, on_panic_show, on_panic_store); |
| |
| static void do_panic(void) |
| { |
| lgr_info_log(); |
| on_panic_trigger.action->fn(&on_panic_trigger); |
| stop_run(&on_panic_trigger); |
| } |
| |
| /* on restart */ |
| |
| static struct shutdown_trigger on_restart_trigger = {ON_RESTART_STR, |
| &stop_action}; |
| |
| static ssize_t on_restart_show(struct kobject *kobj, |
| struct kobj_attribute *attr, char *page) |
| { |
| return sprintf(page, "%s\n", on_restart_trigger.action->name); |
| } |
| |
| static ssize_t on_restart_store(struct kobject *kobj, |
| struct kobj_attribute *attr, |
| const char *buf, size_t len) |
| { |
| return set_trigger(buf, &on_restart_trigger, len); |
| } |
| |
| static struct kobj_attribute on_restart_attr = |
| __ATTR(on_restart, 0644, on_restart_show, on_restart_store); |
| |
| static void __do_restart(void *ignore) |
| { |
| __arch_local_irq_stosm(0x04); /* enable DAT */ |
| smp_send_stop(); |
| #ifdef CONFIG_CRASH_DUMP |
| crash_kexec(NULL); |
| #endif |
| on_restart_trigger.action->fn(&on_restart_trigger); |
| stop_run(&on_restart_trigger); |
| } |
| |
| void do_restart(void) |
| { |
| tracing_off(); |
| debug_locks_off(); |
| lgr_info_log(); |
| smp_call_online_cpu(__do_restart, NULL); |
| } |
| |
| /* on halt */ |
| |
| static struct shutdown_trigger on_halt_trigger = {ON_HALT_STR, &stop_action}; |
| |
| static ssize_t on_halt_show(struct kobject *kobj, |
| struct kobj_attribute *attr, char *page) |
| { |
| return sprintf(page, "%s\n", on_halt_trigger.action->name); |
| } |
| |
| static ssize_t on_halt_store(struct kobject *kobj, |
| struct kobj_attribute *attr, |
| const char *buf, size_t len) |
| { |
| return set_trigger(buf, &on_halt_trigger, len); |
| } |
| |
| static struct kobj_attribute on_halt_attr = |
| __ATTR(on_halt, 0644, on_halt_show, on_halt_store); |
| |
| |
| static void do_machine_halt(void) |
| { |
| smp_send_stop(); |
| on_halt_trigger.action->fn(&on_halt_trigger); |
| stop_run(&on_halt_trigger); |
| } |
| void (*_machine_halt)(void) = do_machine_halt; |
| |
| /* on power off */ |
| |
| static struct shutdown_trigger on_poff_trigger = {ON_POFF_STR, &stop_action}; |
| |
| static ssize_t on_poff_show(struct kobject *kobj, |
| struct kobj_attribute *attr, char *page) |
| { |
| return sprintf(page, "%s\n", on_poff_trigger.action->name); |
| } |
| |
| static ssize_t on_poff_store(struct kobject *kobj, |
| struct kobj_attribute *attr, |
| const char *buf, size_t len) |
| { |
| return set_trigger(buf, &on_poff_trigger, len); |
| } |
| |
| static struct kobj_attribute on_poff_attr = |
| __ATTR(on_poff, 0644, on_poff_show, on_poff_store); |
| |
| |
| static void do_machine_power_off(void) |
| { |
| smp_send_stop(); |
| on_poff_trigger.action->fn(&on_poff_trigger); |
| stop_run(&on_poff_trigger); |
| } |
| void (*_machine_power_off)(void) = do_machine_power_off; |
| |
| static void __init shutdown_triggers_init(void) |
| { |
| shutdown_actions_kset = kset_create_and_add("shutdown_actions", NULL, |
| firmware_kobj); |
| if (!shutdown_actions_kset) |
| goto fail; |
| if (sysfs_create_file(&shutdown_actions_kset->kobj, |
| &on_reboot_attr.attr)) |
| goto fail; |
| if (sysfs_create_file(&shutdown_actions_kset->kobj, |
| &on_panic_attr.attr)) |
| goto fail; |
| if (sysfs_create_file(&shutdown_actions_kset->kobj, |
| &on_halt_attr.attr)) |
| goto fail; |
| if (sysfs_create_file(&shutdown_actions_kset->kobj, |
| &on_poff_attr.attr)) |
| goto fail; |
| if (sysfs_create_file(&shutdown_actions_kset->kobj, |
| &on_restart_attr.attr)) |
| goto fail; |
| return; |
| fail: |
| panic("shutdown_triggers_init failed\n"); |
| } |
| |
| static void __init shutdown_actions_init(void) |
| { |
| int i; |
| |
| for (i = 0; i < SHUTDOWN_ACTIONS_COUNT; i++) { |
| if (!shutdown_actions_list[i]->init) |
| continue; |
| shutdown_actions_list[i]->init_rc = |
| shutdown_actions_list[i]->init(); |
| } |
| } |
| |
| static int __init s390_ipl_init(void) |
| { |
| sclp_get_ipl_info(&sclp_ipl_info); |
| shutdown_actions_init(); |
| shutdown_triggers_init(); |
| return 0; |
| } |
| |
| __initcall(s390_ipl_init); |
| |
| static void __init strncpy_skip_quote(char *dst, char *src, int n) |
| { |
| int sx, dx; |
| |
| dx = 0; |
| for (sx = 0; src[sx] != 0; sx++) { |
| if (src[sx] == '"') |
| continue; |
| dst[dx++] = src[sx]; |
| if (dx >= n) |
| break; |
| } |
| } |
| |
| static int __init vmcmd_on_reboot_setup(char *str) |
| { |
| if (!MACHINE_IS_VM) |
| return 1; |
| strncpy_skip_quote(vmcmd_on_reboot, str, 127); |
| vmcmd_on_reboot[127] = 0; |
| on_reboot_trigger.action = &vmcmd_action; |
| return 1; |
| } |
| __setup("vmreboot=", vmcmd_on_reboot_setup); |
| |
| static int __init vmcmd_on_panic_setup(char *str) |
| { |
| if (!MACHINE_IS_VM) |
| return 1; |
| strncpy_skip_quote(vmcmd_on_panic, str, 127); |
| vmcmd_on_panic[127] = 0; |
| on_panic_trigger.action = &vmcmd_action; |
| return 1; |
| } |
| __setup("vmpanic=", vmcmd_on_panic_setup); |
| |
| static int __init vmcmd_on_halt_setup(char *str) |
| { |
| if (!MACHINE_IS_VM) |
| return 1; |
| strncpy_skip_quote(vmcmd_on_halt, str, 127); |
| vmcmd_on_halt[127] = 0; |
| on_halt_trigger.action = &vmcmd_action; |
| return 1; |
| } |
| __setup("vmhalt=", vmcmd_on_halt_setup); |
| |
| static int __init vmcmd_on_poff_setup(char *str) |
| { |
| if (!MACHINE_IS_VM) |
| return 1; |
| strncpy_skip_quote(vmcmd_on_poff, str, 127); |
| vmcmd_on_poff[127] = 0; |
| on_poff_trigger.action = &vmcmd_action; |
| return 1; |
| } |
| __setup("vmpoff=", vmcmd_on_poff_setup); |
| |
| static int on_panic_notify(struct notifier_block *self, |
| unsigned long event, void *data) |
| { |
| do_panic(); |
| return NOTIFY_OK; |
| } |
| |
| static struct notifier_block on_panic_nb = { |
| .notifier_call = on_panic_notify, |
| .priority = INT_MIN, |
| }; |
| |
| void __init setup_ipl(void) |
| { |
| ipl_info.type = get_ipl_type(); |
| switch (ipl_info.type) { |
| case IPL_TYPE_CCW: |
| ipl_info.data.ccw.dev_id.devno = ipl_devno; |
| ipl_info.data.ccw.dev_id.ssid = 0; |
| break; |
| case IPL_TYPE_FCP: |
| case IPL_TYPE_FCP_DUMP: |
| ipl_info.data.fcp.dev_id.devno = |
| IPL_PARMBLOCK_START->ipl_info.fcp.devno; |
| ipl_info.data.fcp.dev_id.ssid = 0; |
| ipl_info.data.fcp.wwpn = IPL_PARMBLOCK_START->ipl_info.fcp.wwpn; |
| ipl_info.data.fcp.lun = IPL_PARMBLOCK_START->ipl_info.fcp.lun; |
| break; |
| case IPL_TYPE_NSS: |
| strncpy(ipl_info.data.nss.name, kernel_nss_name, |
| sizeof(ipl_info.data.nss.name)); |
| break; |
| case IPL_TYPE_UNKNOWN: |
| /* We have no info to copy */ |
| break; |
| } |
| atomic_notifier_chain_register(&panic_notifier_list, &on_panic_nb); |
| } |
| |
| void __init ipl_update_parameters(void) |
| { |
| int rc; |
| |
| rc = diag308(DIAG308_STORE, &ipl_block); |
| if ((rc == DIAG308_RC_OK) || (rc == DIAG308_RC_NOCONFIG)) |
| diag308_set_works = 1; |
| } |
| |
| void __init ipl_save_parameters(void) |
| { |
| struct cio_iplinfo iplinfo; |
| void *src, *dst; |
| |
| if (cio_get_iplinfo(&iplinfo)) |
| return; |
| |
| ipl_devno = iplinfo.devno; |
| ipl_flags |= IPL_DEVNO_VALID; |
| if (!iplinfo.is_qdio) |
| return; |
| ipl_flags |= IPL_PARMBLOCK_VALID; |
| src = (void *)(unsigned long)S390_lowcore.ipl_parmblock_ptr; |
| dst = (void *)IPL_PARMBLOCK_ORIGIN; |
| memmove(dst, src, PAGE_SIZE); |
| S390_lowcore.ipl_parmblock_ptr = IPL_PARMBLOCK_ORIGIN; |
| } |
| |
| static LIST_HEAD(rcall); |
| static DEFINE_MUTEX(rcall_mutex); |
| |
| void register_reset_call(struct reset_call *reset) |
| { |
| mutex_lock(&rcall_mutex); |
| list_add(&reset->list, &rcall); |
| mutex_unlock(&rcall_mutex); |
| } |
| EXPORT_SYMBOL_GPL(register_reset_call); |
| |
| void unregister_reset_call(struct reset_call *reset) |
| { |
| mutex_lock(&rcall_mutex); |
| list_del(&reset->list); |
| mutex_unlock(&rcall_mutex); |
| } |
| EXPORT_SYMBOL_GPL(unregister_reset_call); |
| |
| static void do_reset_calls(void) |
| { |
| struct reset_call *reset; |
| |
| #ifdef CONFIG_64BIT |
| if (diag308_set_works) { |
| diag308_reset(); |
| return; |
| } |
| #endif |
| list_for_each_entry(reset, &rcall, list) |
| reset->fn(); |
| } |
| |
| u32 dump_prefix_page; |
| |
| void s390_reset_system(void (*func)(void *), void *data) |
| { |
| struct _lowcore *lc; |
| |
| lc = (struct _lowcore *)(unsigned long) store_prefix(); |
| |
| /* Stack for interrupt/machine check handler */ |
| lc->panic_stack = S390_lowcore.panic_stack; |
| |
| /* Save prefix page address for dump case */ |
| dump_prefix_page = (u32)(unsigned long) lc; |
| |
| /* Disable prefixing */ |
| set_prefix(0); |
| |
| /* Disable lowcore protection */ |
| __ctl_clear_bit(0,28); |
| |
| /* Set new machine check handler */ |
| S390_lowcore.mcck_new_psw.mask = PSW_KERNEL_BITS | PSW_MASK_DAT; |
| S390_lowcore.mcck_new_psw.addr = |
| PSW_ADDR_AMODE | (unsigned long) s390_base_mcck_handler; |
| |
| /* Set new program check handler */ |
| S390_lowcore.program_new_psw.mask = PSW_KERNEL_BITS | PSW_MASK_DAT; |
| S390_lowcore.program_new_psw.addr = |
| PSW_ADDR_AMODE | (unsigned long) s390_base_pgm_handler; |
| |
| /* |
| * 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(); |
| |
| do_reset_calls(); |
| if (func) |
| func(data); |
| } |