diff options
Diffstat (limited to 'ANDROID_3.4.5/arch/s390/kernel/ipl.c')
| -rw-r--r-- | ANDROID_3.4.5/arch/s390/kernel/ipl.c | 2069 |
1 files changed, 0 insertions, 2069 deletions
diff --git a/ANDROID_3.4.5/arch/s390/kernel/ipl.c b/ANDROID_3.4.5/arch/s390/kernel/ipl.c deleted file mode 100644 index 8342e65a..00000000 --- a/ANDROID_3.4.5/arch/s390/kernel/ipl.c +++ /dev/null @@ -1,2069 +0,0 @@ -/* - * arch/s390/kernel/ipl.c - * 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", "%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 = { - .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", "%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 (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 __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(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; - 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) -{ - u32 csum; - - csum = csum_partial(reipl_block_actual, reipl_block_actual->hdr.len, 0); - copy_to_absolute_zero(&S390_lowcore.ipib_checksum, &csum, sizeof(csum)); - copy_to_absolute_zero(&S390_lowcore.ipib, &reipl_block_actual, - sizeof(reipl_block_actual)); - 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, *next_cmd; - - if (strcmp(trigger->name, ON_REIPL_STR) == 0) - cmd = vmcmd_on_reboot; - else if (strcmp(trigger->name, ON_PANIC_STR) == 0) - cmd = vmcmd_on_panic; - else if (strcmp(trigger->name, ON_HALT_STR) == 0) - cmd = vmcmd_on_halt; - else if (strcmp(trigger->name, ON_POFF_STR) == 0) - cmd = vmcmd_on_poff; - else if (strcmp(trigger->name, ON_RESTART_STR) == 0) - cmd = vmcmd_on_restart; - else - return; - - if (strlen(cmd) == 0) - return; - do { - next_cmd = strchr(cmd, '\n'); - if (next_cmd) { - next_cmd[0] = 0; - next_cmd += 1; - } - __cpcmd(cmd, NULL, 0, NULL); - cmd = next_cmd; - } while (cmd != NULL); -} - -static int vmcmd_init(void) -{ - if (!MACHINE_IS_VM) - return -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) -{ - 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; - - /* Store status at absolute zero */ - store_status(); - - do_reset_calls(); - if (func) - func(data); -} |