diff options
Diffstat (limited to 'arch/s390/kernel')
| -rw-r--r-- | arch/s390/kernel/Makefile | 4 | ||||
| -rw-r--r-- | arch/s390/kernel/early.c | 2 | ||||
| -rw-r--r-- | arch/s390/kernel/head64.S | 2 | ||||
| -rw-r--r-- | arch/s390/kernel/ipl.c | 948 | ||||
| -rw-r--r-- | arch/s390/kernel/process.c | 18 | ||||
| -rw-r--r-- | arch/s390/kernel/ptrace.c | 15 | ||||
| -rw-r--r-- | arch/s390/kernel/setup.c | 139 | ||||
| -rw-r--r-- | arch/s390/kernel/signal.c | 20 | ||||
| -rw-r--r-- | arch/s390/kernel/smp.c | 575 | ||||
| -rw-r--r-- | arch/s390/kernel/traps.c | 20 | ||||
| -rw-r--r-- | arch/s390/kernel/vmlinux.lds.S | 12 |
11 files changed, 1120 insertions, 635 deletions
diff --git a/arch/s390/kernel/Makefile b/arch/s390/kernel/Makefile index 56cb71007cd9..b3b650a93c7c 100644 --- a/arch/s390/kernel/Makefile +++ b/arch/s390/kernel/Makefile @@ -31,7 +31,3 @@ S390_KEXEC_OBJS := machine_kexec.o crash.o S390_KEXEC_OBJS += $(if $(CONFIG_64BIT),relocate_kernel64.o,relocate_kernel.o) obj-$(CONFIG_KEXEC) += $(S390_KEXEC_OBJS) -# -# This is just to get the dependencies... -# -binfmt_elf32.o: $(TOPDIR)/fs/binfmt_elf.c diff --git a/arch/s390/kernel/early.c b/arch/s390/kernel/early.c index 1b3af7dab816..9f7b73b180f0 100644 --- a/arch/s390/kernel/early.c +++ b/arch/s390/kernel/early.c @@ -276,7 +276,7 @@ void __init startup_init(void) create_kernel_nss(); sort_main_extable(); setup_lowcore_early(); - sclp_readinfo_early(); + sclp_read_info_early(); sclp_facilities_detect(); memsize = sclp_memory_detect(); #ifndef CONFIG_64BIT diff --git a/arch/s390/kernel/head64.S b/arch/s390/kernel/head64.S index a87b1976d409..79dccd206a6e 100644 --- a/arch/s390/kernel/head64.S +++ b/arch/s390/kernel/head64.S @@ -157,7 +157,7 @@ startup_continue: .long 0xb2b10000 # store facility list tm 0xc8,0x08 # check bit for clearing-by-ASCE bno 0f-.LPG1(%r13) - lhi %r1,2094 + lhi %r1,2048 lhi %r2,0 .long 0xb98e2001 oi 7(%r12),0x80 # set IDTE flag diff --git a/arch/s390/kernel/ipl.c b/arch/s390/kernel/ipl.c index b97694fa62ec..db28cca81fef 100644 --- a/arch/s390/kernel/ipl.c +++ b/arch/s390/kernel/ipl.c @@ -2,7 +2,7 @@ * arch/s390/kernel/ipl.c * ipl/reipl/dump support for Linux on s390. * - * Copyright (C) IBM Corp. 2005,2006 + * Copyright IBM Corp. 2005,2007 * Author(s): Michael Holzheu <holzheu@de.ibm.com> * Heiko Carstens <heiko.carstens@de.ibm.com> * Volker Sameske <sameske@de.ibm.com> @@ -31,6 +31,43 @@ #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 + */ +#define ON_PANIC_STR "on_panic" +#define ON_HALT_STR "on_halt" +#define ON_POFF_STR "on_poff" +#define ON_REIPL_STR "on_reboot" + +struct shutdown_action; +struct shutdown_trigger { + char *name; + struct shutdown_action *action; +}; + +/* + * Five 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" + +struct shutdown_action { + char *name; + void (*fn) (struct shutdown_trigger *trigger); + int (*init) (void); +}; + static char *ipl_type_str(enum ipl_type type) { switch (type) { @@ -54,10 +91,6 @@ enum dump_type { DUMP_TYPE_FCP = 4, }; -#define DUMP_NONE_STR "none" -#define DUMP_CCW_STR "ccw" -#define DUMP_FCP_STR "fcp" - static char *dump_type_str(enum dump_type type) { switch (type) { @@ -99,30 +132,6 @@ enum dump_method { DUMP_METHOD_FCP_DIAG, }; -enum shutdown_action { - SHUTDOWN_REIPL, - SHUTDOWN_DUMP, - SHUTDOWN_STOP, -}; - -#define SHUTDOWN_REIPL_STR "reipl" -#define SHUTDOWN_DUMP_STR "dump" -#define SHUTDOWN_STOP_STR "stop" - -static char *shutdown_action_str(enum shutdown_action action) -{ - switch (action) { - case SHUTDOWN_REIPL: - return SHUTDOWN_REIPL_STR; - case SHUTDOWN_DUMP: - return SHUTDOWN_DUMP_STR; - case SHUTDOWN_STOP: - return SHUTDOWN_STOP_STR; - default: - return NULL; - } -} - static int diag308_set_works = 0; static int reipl_capabilities = IPL_TYPE_UNKNOWN; @@ -140,8 +149,6 @@ static enum dump_method dump_method = DUMP_METHOD_NONE; static struct ipl_parameter_block *dump_block_fcp; static struct ipl_parameter_block *dump_block_ccw; -static enum shutdown_action on_panic_action = SHUTDOWN_STOP; - static struct sclp_ipl_info sclp_ipl_info; int diag308(unsigned long subcode, void *addr) @@ -205,8 +212,8 @@ static ssize_t sys_##_prefix##_##_name##_store(struct kobject *kobj, \ struct kobj_attribute *attr, \ const char *buf, size_t len) \ { \ - if (sscanf(buf, _fmt_in, _value) != 1) \ - return -EINVAL; \ + strncpy(_value, buf, sizeof(_value) - 1); \ + strstrip(_value); \ return len; \ } \ static struct kobj_attribute sys_##_prefix##_##_name##_attr = \ @@ -245,33 +252,6 @@ static __init enum ipl_type get_ipl_type(void) return IPL_TYPE_FCP; } -void __init setup_ipl_info(void) -{ - ipl_info.type = get_ipl_type(); - switch (ipl_info.type) { - case IPL_TYPE_CCW: - ipl_info.data.ccw.dev_id.devno = ipl_devno; - ipl_info.data.ccw.dev_id.ssid = 0; - break; - case IPL_TYPE_FCP: - case IPL_TYPE_FCP_DUMP: - ipl_info.data.fcp.dev_id.devno = - IPL_PARMBLOCK_START->ipl_info.fcp.devno; - ipl_info.data.fcp.dev_id.ssid = 0; - ipl_info.data.fcp.wwpn = IPL_PARMBLOCK_START->ipl_info.fcp.wwpn; - ipl_info.data.fcp.lun = IPL_PARMBLOCK_START->ipl_info.fcp.lun; - break; - case IPL_TYPE_NSS: - strncpy(ipl_info.data.nss.name, kernel_nss_name, - sizeof(ipl_info.data.nss.name)); - break; - case IPL_TYPE_UNKNOWN: - default: - /* We have no info to copy */ - break; - } -} - struct ipl_info ipl_info; EXPORT_SYMBOL_GPL(ipl_info); @@ -428,8 +408,74 @@ static struct attribute_group ipl_unknown_attr_group = { 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(struct shutdown_trigger *trigger) +{ + 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 int 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: + rc = sysfs_create_group(&ipl_kset->kobj, &ipl_ccw_attr_group); + break; + case IPL_TYPE_FCP: + case IPL_TYPE_FCP_DUMP: + rc = ipl_register_fcp_files(); + break; + case IPL_TYPE_NSS: + rc = sysfs_create_group(&ipl_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 ipl_action = {SHUTDOWN_ACTION_IPL_STR, ipl_run, + ipl_init}; + /* - * reipl section + * reipl shutdown action: Reboot Linux on shutdown. */ /* FCP reipl device attributes */ @@ -549,7 +595,9 @@ static int reipl_set_type(enum ipl_type type) switch(type) { case IPL_TYPE_CCW: - if (MACHINE_IS_VM) + 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; @@ -600,143 +648,11 @@ static ssize_t reipl_type_store(struct kobject *kobj, } static struct kobj_attribute reipl_type_attr = - __ATTR(reipl_type, 0644, reipl_type_show, reipl_type_store); + __ATTR(reipl_type, 0644, reipl_type_show, reipl_type_store); static struct kset *reipl_kset; -/* - * dump section - */ - -/* FCP dump device attributes */ - -DEFINE_IPL_ATTR_RW(dump_fcp, wwpn, "0x%016llx\n", "%016llx\n", - dump_block_fcp->ipl_info.fcp.wwpn); -DEFINE_IPL_ATTR_RW(dump_fcp, lun, "0x%016llx\n", "%016llx\n", - dump_block_fcp->ipl_info.fcp.lun); -DEFINE_IPL_ATTR_RW(dump_fcp, bootprog, "%lld\n", "%lld\n", - dump_block_fcp->ipl_info.fcp.bootprog); -DEFINE_IPL_ATTR_RW(dump_fcp, br_lba, "%lld\n", "%lld\n", - dump_block_fcp->ipl_info.fcp.br_lba); -DEFINE_IPL_ATTR_RW(dump_fcp, device, "0.0.%04llx\n", "0.0.%llx\n", - dump_block_fcp->ipl_info.fcp.devno); - -static struct attribute *dump_fcp_attrs[] = { - &sys_dump_fcp_device_attr.attr, - &sys_dump_fcp_wwpn_attr.attr, - &sys_dump_fcp_lun_attr.attr, - &sys_dump_fcp_bootprog_attr.attr, - &sys_dump_fcp_br_lba_attr.attr, - NULL, -}; - -static struct attribute_group dump_fcp_attr_group = { - .name = IPL_FCP_STR, - .attrs = dump_fcp_attrs, -}; - -/* CCW dump device attributes */ - -DEFINE_IPL_ATTR_RW(dump_ccw, device, "0.0.%04llx\n", "0.0.%llx\n", - dump_block_ccw->ipl_info.ccw.devno); - -static struct attribute *dump_ccw_attrs[] = { - &sys_dump_ccw_device_attr.attr, - NULL, -}; - -static struct attribute_group dump_ccw_attr_group = { - .name = IPL_CCW_STR, - .attrs = dump_ccw_attrs, -}; - -/* dump type */ - -static int dump_set_type(enum dump_type type) -{ - if (!(dump_capabilities & type)) - return -EINVAL; - switch(type) { - case DUMP_TYPE_CCW: - if (MACHINE_IS_VM) - dump_method = DUMP_METHOD_CCW_VM; - else if (diag308_set_works) - dump_method = DUMP_METHOD_CCW_DIAG; - 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; - -/* - * Shutdown actions section - */ - -static struct kset *shutdown_actions_kset; - -/* on panic */ - -static ssize_t on_panic_show(struct kobject *kobj, - struct kobj_attribute *attr, char *page) -{ - return sprintf(page, "%s\n", shutdown_action_str(on_panic_action)); -} - -static ssize_t on_panic_store(struct kobject *kobj, - struct kobj_attribute *attr, - const char *buf, size_t len) -{ - if (strncmp(buf, SHUTDOWN_REIPL_STR, strlen(SHUTDOWN_REIPL_STR)) == 0) - on_panic_action = SHUTDOWN_REIPL; - else if (strncmp(buf, SHUTDOWN_DUMP_STR, - strlen(SHUTDOWN_DUMP_STR)) == 0) - on_panic_action = SHUTDOWN_DUMP; - else if (strncmp(buf, SHUTDOWN_STOP_STR, - strlen(SHUTDOWN_STOP_STR)) == 0) - on_panic_action = SHUTDOWN_STOP; - else - return -EINVAL; - - return len; -} - -static struct kobj_attribute on_panic_attr = - __ATTR(on_panic, 0644, on_panic_show, on_panic_store); - -void do_reipl(void) +void reipl_run(struct shutdown_trigger *trigger) { struct ccw_dev_id devid; static char buf[100]; @@ -745,8 +661,6 @@ void do_reipl(void) switch (reipl_method) { case REIPL_METHOD_CCW_CIO: devid.devno = reipl_block_ccw->ipl_info.ccw.devno; - if (ipl_info.type == IPL_TYPE_CCW && devid.devno == ipl_devno) - diag308(DIAG308_IPL, NULL); devid.ssid = 0; reipl_ccw_dev(&devid); break; @@ -787,98 +701,6 @@ void do_reipl(void) default: break; } - signal_processor(smp_processor_id(), sigp_stop_and_store_status); -} - -static void do_dump(void) -{ - struct ccw_dev_id devid; - static char buf[100]; - - switch (dump_method) { - case DUMP_METHOD_CCW_CIO: - smp_send_stop(); - devid.devno = dump_block_ccw->ipl_info.ccw.devno; - devid.ssid = 0; - reipl_ccw_dev(&devid); - break; - case DUMP_METHOD_CCW_VM: - smp_send_stop(); - sprintf(buf, "STORE STATUS"); - __cpcmd(buf, NULL, 0, NULL); - sprintf(buf, "IPL %X", dump_block_ccw->ipl_info.ccw.devno); - __cpcmd(buf, NULL, 0, NULL); - break; - case DUMP_METHOD_CCW_DIAG: - diag308(DIAG308_SET, dump_block_ccw); - diag308(DIAG308_DUMP, NULL); - break; - case DUMP_METHOD_FCP_DIAG: - diag308(DIAG308_SET, dump_block_fcp); - diag308(DIAG308_DUMP, NULL); - break; - case DUMP_METHOD_NONE: - default: - return; - } - printk(KERN_EMERG "Dump failed!\n"); -} - -/* init functions */ - -static int __init ipl_register_fcp_files(void) -{ - int rc; - - rc = sysfs_create_group(&ipl_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 int __init ipl_init(void) -{ - int rc; - - ipl_kset = kset_create_and_add("ipl", NULL, firmware_kobj); - if (!ipl_kset) - return -ENOMEM; - switch (ipl_info.type) { - case IPL_TYPE_CCW: - rc = sysfs_create_group(&ipl_kset->kobj, - &ipl_ccw_attr_group); - break; - case IPL_TYPE_FCP: - case IPL_TYPE_FCP_DUMP: - rc = ipl_register_fcp_files(); - break; - case IPL_TYPE_NSS: - rc = sysfs_create_group(&ipl_kset->kobj, - &ipl_nss_attr_group); - break; - default: - rc = sysfs_create_group(&ipl_kset->kobj, - &ipl_unknown_attr_group); - break; - } - if (rc) - kset_unregister(ipl_kset); - return rc; } static void __init reipl_probe(void) @@ -923,6 +745,7 @@ static int __init reipl_ccw_init(void) reipl_block_ccw->hdr.version = IPL_PARM_BLOCK_VERSION; reipl_block_ccw->hdr.blk0_len = IPL_PARM_BLK0_CCW_LEN; reipl_block_ccw->hdr.pbt = DIAG308_IPL_TYPE_CCW; + reipl_block_ccw->hdr.flags = DIAG308_FLAGS_LP_VALID; /* check if read scp info worked and set loadparm */ if (sclp_ipl_info.is_valid) memcpy(reipl_block_ccw->ipl_info.ccw.load_param, @@ -931,8 +754,7 @@ static int __init reipl_ccw_init(void) /* read scp info failed: set empty loadparm (EBCDIC blanks) */ memset(reipl_block_ccw->ipl_info.ccw.load_param, 0x40, LOADPARM_LEN); - /* FIXME: check for diag308_set_works when enabling diag ccw reipl */ - if (!MACHINE_IS_VM) + if (!MACHINE_IS_VM && !diag308_set_works) sys_reipl_ccw_loadparm_attr.attr.mode = S_IRUGO; if (ipl_info.type == IPL_TYPE_CCW) reipl_block_ccw->ipl_info.ccw.devno = ipl_devno; @@ -970,7 +792,7 @@ static int __init reipl_fcp_init(void) return 0; } -static int __init reipl_init(void) +static int reipl_init(void) { int rc; @@ -997,6 +819,140 @@ static int __init reipl_init(void) return 0; } +static struct shutdown_action reipl_action = {SHUTDOWN_ACTION_REIPL_STR, + reipl_run, 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(struct shutdown_trigger *trigger) +{ + struct ccw_dev_id devid; + static char buf[100]; + + switch (dump_method) { + case DUMP_METHOD_CCW_CIO: + smp_send_stop(); + devid.devno = dump_block_ccw->ipl_info.ccw.devno; + devid.ssid = 0; + reipl_ccw_dev(&devid); + break; + case DUMP_METHOD_CCW_VM: + smp_send_stop(); + sprintf(buf, "STORE STATUS"); + __cpcmd(buf, NULL, 0, NULL); + sprintf(buf, "IPL %X", dump_block_ccw->ipl_info.ccw.devno); + __cpcmd(buf, NULL, 0, NULL); + break; + case DUMP_METHOD_CCW_DIAG: + diag308(DIAG308_SET, dump_block_ccw); + diag308(DIAG308_DUMP, NULL); + break; + case DUMP_METHOD_FCP_DIAG: + diag308(DIAG308_SET, dump_block_fcp); + diag308(DIAG308_DUMP, NULL); + break; + case DUMP_METHOD_NONE: + default: + return; + } + printk(KERN_EMERG "Dump failed!\n"); +} + static int __init dump_ccw_init(void) { int rc; @@ -1042,31 +998,14 @@ static int __init dump_fcp_init(void) return 0; } -#define SHUTDOWN_ON_PANIC_PRIO 0 - -static int shutdown_on_panic_notify(struct notifier_block *self, - unsigned long event, void *data) -{ - if (on_panic_action == SHUTDOWN_DUMP) - do_dump(); - else if (on_panic_action == SHUTDOWN_REIPL) - do_reipl(); - return NOTIFY_OK; -} - -static struct notifier_block shutdown_on_panic_nb = { - .notifier_call = shutdown_on_panic_notify, - .priority = SHUTDOWN_ON_PANIC_PRIO -}; - -static int __init dump_init(void) +static int 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); + rc = sysfs_create_file(&dump_kset->kobj, &dump_type_attr.attr); if (rc) { kset_unregister(dump_kset); return rc; @@ -1081,47 +1020,381 @@ static int __init dump_init(void) return 0; } -static int __init shutdown_actions_init(void) +static struct shutdown_action dump_action = {SHUTDOWN_ACTION_DUMP_STR, + dump_run, dump_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]; + +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); + +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, + 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 + 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) { - int rc; + if (!MACHINE_IS_VM) + return -ENOTSUPP; + 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) + disabled_wait((unsigned long) __builtin_return_address(0)); + else { + signal_processor(smp_processor_id(), sigp_stop); + for (;;); + } +} + +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_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 (!shutdown_actions_list[i]) + continue; + if (strncmp(buf, shutdown_actions_list[i]->name, + strlen(shutdown_actions_list[i]->name)) == 0) { + 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) +{ + on_panic_trigger.action->fn(&on_panic_trigger); + stop_run(&on_panic_trigger); +} + +/* 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) - return -ENOMEM; - rc = sysfs_create_file(&shutdown_actions_kset->kobj, &on_panic_attr); - if (rc) { - kset_unregister(shutdown_actions_kset); - return rc; + 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; + + 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; + if (shutdown_actions_list[i]->init()) + shutdown_actions_list[i] = NULL; } - atomic_notifier_chain_register(&panic_notifier_list, - &shutdown_on_panic_nb); - return 0; } static int __init s390_ipl_init(void) { - int rc; - - sclp_get_ipl_info(&sclp_ipl_info); reipl_probe(); - rc = ipl_init(); - if (rc) - return rc; - rc = reipl_init(); - if (rc) - return rc; - rc = dump_init(); - if (rc) - return rc; - rc = shutdown_actions_init(); - if (rc) - return rc; + 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 = 0, +}; + +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: + default: + /* We have no info to copy */ + break; + } + atomic_notifier_chain_register(&panic_notifier_list, &on_panic_nb); +} + void __init ipl_save_parameters(void) { struct cio_iplinfo iplinfo; @@ -1202,3 +1475,4 @@ void s390_reset_system(void) do_reset_calls(); } + diff --git a/arch/s390/kernel/process.c b/arch/s390/kernel/process.c index 29f7884b4ffa..0e7aca039307 100644 --- a/arch/s390/kernel/process.c +++ b/arch/s390/kernel/process.c @@ -36,7 +36,7 @@ #include <linux/init.h> #include <linux/module.h> #include <linux/notifier.h> - +#include <linux/utsname.h> #include <asm/uaccess.h> #include <asm/pgtable.h> #include <asm/system.h> @@ -182,13 +182,15 @@ void cpu_idle(void) void show_regs(struct pt_regs *regs) { - struct task_struct *tsk = current; - - printk("CPU: %d %s\n", task_thread_info(tsk)->cpu, print_tainted()); - printk("Process %s (pid: %d, task: %p, ksp: %p)\n", - current->comm, task_pid_nr(current), (void *) tsk, - (void *) tsk->thread.ksp); - + print_modules(); + printk("CPU: %d %s %s %.*s\n", + task_thread_info(current)->cpu, print_tainted(), + init_utsname()->release, + (int)strcspn(init_utsname()->version, " "), + init_utsname()->version); + printk("Process %s (pid: %d, task: %p, ksp: %p)\n", + current->comm, current->pid, current, + (void *) current->thread.ksp); show_registers(regs); /* Show stack backtrace if pt_regs is from kernel mode */ if (!(regs->psw.mask & PSW_MASK_PSTATE)) diff --git a/arch/s390/kernel/ptrace.c b/arch/s390/kernel/ptrace.c index 1d81bf9488ae..6e036bae9875 100644 --- a/arch/s390/kernel/ptrace.c +++ b/arch/s390/kernel/ptrace.c @@ -86,13 +86,13 @@ FixPerRegisters(struct task_struct *task) per_info->control_regs.bits.storage_alt_space_ctl = 0; } -static void set_single_step(struct task_struct *task) +void user_enable_single_step(struct task_struct *task) { task->thread.per_info.single_step = 1; FixPerRegisters(task); } -static void clear_single_step(struct task_struct *task) +void user_disable_single_step(struct task_struct *task) { task->thread.per_info.single_step = 0; FixPerRegisters(task); @@ -107,7 +107,7 @@ void ptrace_disable(struct task_struct *child) { /* make sure the single step bit is not set. */ - clear_single_step(child); + user_disable_single_step(child); } #ifndef CONFIG_64BIT @@ -651,7 +651,7 @@ do_ptrace(struct task_struct *child, long request, long addr, long data) clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE); child->exit_code = data; /* make sure the single step bit is not set. */ - clear_single_step(child); + user_disable_single_step(child); wake_up_process(child); return 0; @@ -665,7 +665,7 @@ do_ptrace(struct task_struct *child, long request, long addr, long data) return 0; child->exit_code = SIGKILL; /* make sure the single step bit is not set. */ - clear_single_step(child); + user_disable_single_step(child); wake_up_process(child); return 0; @@ -675,10 +675,7 @@ do_ptrace(struct task_struct *child, long request, long addr, long data) return -EIO; clear_tsk_thread_flag(child, TIF_SYSCALL_TRACE); child->exit_code = data; - if (data) - set_tsk_thread_flag(child, TIF_SINGLE_STEP); - else - set_single_step(child); + user_enable_single_step(child); /* give it a chance to run. */ wake_up_process(child); return 0; diff --git a/arch/s390/kernel/setup.c b/arch/s390/kernel/setup.c index 577aa7dd660e..766c783bd7a7 100644 --- a/arch/s390/kernel/setup.c +++ b/arch/s390/kernel/setup.c @@ -126,75 +126,6 @@ void __cpuinit cpu_init(void) } /* - * VM halt and poweroff setup routines - */ -char vmhalt_cmd[128] = ""; -char vmpoff_cmd[128] = ""; -static char vmpanic_cmd[128] = ""; - -static void 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 vmhalt_setup(char *str) -{ - strncpy_skip_quote(vmhalt_cmd, str, 127); - vmhalt_cmd[127] = 0; - return 1; -} - -__setup("vmhalt=", vmhalt_setup); - -static int __init vmpoff_setup(char *str) -{ - strncpy_skip_quote(vmpoff_cmd, str, 127); - vmpoff_cmd[127] = 0; - return 1; -} - -__setup("vmpoff=", vmpoff_setup); - -static int vmpanic_notify(struct notifier_block *self, unsigned long event, - void *data) -{ - if (MACHINE_IS_VM && strlen(vmpanic_cmd) > 0) - cpcmd(vmpanic_cmd, NULL, 0, NULL); - - return NOTIFY_OK; -} - -#define PANIC_PRI_VMPANIC 0 - -static struct notifier_block vmpanic_nb = { - .notifier_call = vmpanic_notify, - .priority = PANIC_PRI_VMPANIC -}; - -static int __init vmpanic_setup(char *str) -{ - static int register_done __initdata = 0; - - strncpy_skip_quote(vmpanic_cmd, str, 127); - vmpanic_cmd[127] = 0; - if (!register_done) { - register_done = 1; - atomic_notifier_chain_register(&panic_notifier_list, - &vmpanic_nb); - } - return 1; -} - -__setup("vmpanic=", vmpanic_setup); - -/* * condev= and conmode= setup parameter. */ @@ -308,38 +239,6 @@ static void __init setup_zfcpdump(unsigned int console_devno) static inline void setup_zfcpdump(unsigned int console_devno) {} #endif /* CONFIG_ZFCPDUMP */ -#ifdef CONFIG_SMP -void (*_machine_restart)(char *command) = machine_restart_smp; -void (*_machine_halt)(void) = machine_halt_smp; -void (*_machine_power_off)(void) = machine_power_off_smp; -#else -/* - * Reboot, halt and power_off routines for non SMP. - */ -static void do_machine_restart_nonsmp(char * __unused) -{ - do_reipl(); -} - -static void do_machine_halt_nonsmp(void) -{ - if (MACHINE_IS_VM && strlen(vmhalt_cmd) > 0) - __cpcmd(vmhalt_cmd, NULL, 0, NULL); - signal_processor(smp_processor_id(), sigp_stop_and_store_status); -} - -static void do_machine_power_off_nonsmp(void) -{ - if (MACHINE_IS_VM && strlen(vmpoff_cmd) > 0) - __cpcmd(vmpoff_cmd, NULL, 0, NULL); - signal_processor(smp_processor_id(), sigp_stop_and_store_status); -} - -void (*_machine_restart)(char *command) = do_machine_restart_nonsmp; -void (*_machine_halt)(void) = do_machine_halt_nonsmp; -void (*_machine_power_off)(void) = do_machine_power_off_nonsmp; -#endif - /* * Reboot, halt and power_off stubs. They just call _machine_restart, * _machine_halt or _machine_power_off. @@ -559,7 +458,9 @@ setup_resources(void) data_resource.start = (unsigned long) &_etext; data_resource.end = (unsigned long) &_edata - 1; - for (i = 0; i < MEMORY_CHUNKS && memory_chunk[i].size > 0; i++) { + for (i = 0; i < MEMORY_CHUNKS; i++) { + if (!memory_chunk[i].size) + continue; res = alloc_bootmem_low(sizeof(struct resource)); res->flags = IORESOURCE_BUSY | IORESOURCE_MEM; switch (memory_chunk[i].type) { @@ -617,7 +518,7 @@ EXPORT_SYMBOL_GPL(real_memory_size); static void __init setup_memory_end(void) { unsigned long memory_size; - unsigned long max_mem, max_phys; + unsigned long max_mem; int i; #if defined(CONFIG_ZFCPDUMP) || defined(CONFIG_ZFCPDUMP_MODULE) @@ -625,10 +526,31 @@ static void __init setup_memory_end(void) memory_end = ZFCPDUMP_HSA_SIZE; #endif memory_size = 0; - max_phys = VMALLOC_END_INIT - VMALLOC_MIN_SIZE; memory_end &= PAGE_MASK; - max_mem = memory_end ? min(max_phys, memory_end) : max_phys; + max_mem = memory_end ? min(VMALLOC_START, memory_end) : VMALLOC_START; + memory_end = min(max_mem, memory_end); + + /* + * Make sure all chunks are MAX_ORDER aligned so we don't need the + * extra checks that HOLES_IN_ZONE would require. + */ + for (i = 0; i < MEMORY_CHUNKS; i++) { + unsigned long start, end; + struct mem_chunk *chunk; + unsigned long align; + + chunk = &memory_chunk[i]; + align = 1UL << (MAX_ORDER + PAGE_SHIFT - 1); + start = (chunk->addr + align - 1) & ~(align - 1); + end = (chunk->addr + chunk->size) & ~(align - 1); + if (start >= end) + memset(chunk, 0, sizeof(*chunk)); + else { + chunk->addr = start; + chunk->size = end - start; + } + } for (i = 0; i < MEMORY_CHUNKS; i++) { struct mem_chunk *chunk = &memory_chunk[i]; @@ -890,7 +812,7 @@ setup_arch(char **cmdline_p) parse_early_param(); - setup_ipl_info(); + setup_ipl(); setup_memory_end(); setup_addressing_mode(); setup_memory(); @@ -899,7 +821,6 @@ setup_arch(char **cmdline_p) cpu_init(); __cpu_logical_map[0] = S390_lowcore.cpu_data.cpu_addr; - smp_setup_cpu_possible_map(); /* * Setup capabilities (ELF_HWCAP & ELF_PLATFORM). @@ -920,7 +841,7 @@ setup_arch(char **cmdline_p) void __cpuinit print_cpu_info(struct cpuinfo_S390 *cpuinfo) { - printk("cpu %d " + printk(KERN_INFO "cpu %d " #ifdef CONFIG_SMP "phys_idx=%d " #endif @@ -996,7 +917,7 @@ static void *c_next(struct seq_file *m, void *v, loff_t *pos) static void c_stop(struct seq_file *m, void *v) { } -struct seq_operations cpuinfo_op = { +const struct seq_operations cpuinfo_op = { .start = c_start, .next = c_next, .stop = c_stop, diff --git a/arch/s390/kernel/signal.c b/arch/s390/kernel/signal.c index d264671c1b71..4449bf32cbf1 100644 --- a/arch/s390/kernel/signal.c +++ b/arch/s390/kernel/signal.c @@ -471,6 +471,7 @@ void do_signal(struct pt_regs *regs) if (signr > 0) { /* Whee! Actually deliver the signal. */ + int ret; #ifdef CONFIG_COMPAT if (test_thread_flag(TIF_31BIT)) { extern int handle_signal32(unsigned long sig, @@ -478,15 +479,12 @@ void do_signal(struct pt_regs *regs) siginfo_t *info, sigset_t *oldset, struct pt_regs *regs); - if (handle_signal32( - signr, &ka, &info, oldset, regs) == 0) { - if (test_thread_flag(TIF_RESTORE_SIGMASK)) - clear_thread_flag(TIF_RESTORE_SIGMASK); - } - return; + ret = handle_signal32(signr, &ka, &info, oldset, regs); } + else #endif - if (handle_signal(signr, &ka, &info, oldset, regs) == 0) { + ret = handle_signal(signr, &ka, &info, oldset, regs); + if (!ret) { /* * A signal was successfully delivered; the saved * sigmask will have been stored in the signal frame, @@ -495,6 +493,14 @@ void do_signal(struct pt_regs *regs) */ if (test_thread_flag(TIF_RESTORE_SIGMASK)) clear_thread_flag(TIF_RESTORE_SIGMASK); + + /* + * If we would have taken a single-step trap + * for a normal instruction, act like we took + * one for the handler setup. + */ + if (current->thread.per_info.single_step) + set_thread_flag(TIF_SINGLE_STEP); } return; } diff --git a/arch/s390/kernel/smp.c b/arch/s390/kernel/smp.c index 264ea906db4c..aa37fa154512 100644 --- a/arch/s390/kernel/smp.c +++ b/arch/s390/kernel/smp.c @@ -42,6 +42,7 @@ #include <asm/tlbflush.h> #include <asm/timer.h> #include <asm/lowcore.h> +#include <asm/sclp.h> #include <asm/cpu.h> /* @@ -53,11 +54,27 @@ EXPORT_SYMBOL(lowcore_ptr); cpumask_t cpu_online_map = CPU_MASK_NONE; EXPORT_SYMBOL(cpu_online_map); -cpumask_t cpu_possible_map = CPU_MASK_NONE; +cpumask_t cpu_possible_map = CPU_MASK_ALL; EXPORT_SYMBOL(cpu_possible_map); static struct task_struct *current_set[NR_CPUS]; +static u8 smp_cpu_type; +static int smp_use_sigp_detection; + +enum s390_cpu_state { + CPU_STATE_STANDBY, + CPU_STATE_CONFIGURED, +}; + +#ifdef CONFIG_HOTPLUG_CPU +static DEFINE_MUTEX(smp_cpu_state_mutex); +#endif +static int smp_cpu_state[NR_CPUS]; + +static DEFINE_PER_CPU(struct cpu, cpu_devices); +DEFINE_PER_CPU(struct s390_idle_data, s390_idle); + static void smp_ext_bitcall(int, ec_bit_sig); /* @@ -193,6 +210,33 @@ int smp_call_function_single(int cpu, void (*func) (void *info), void *info, } EXPORT_SYMBOL(smp_call_function_single); +/** + * smp_call_function_mask(): Run a function on a set of other CPUs. + * @mask: The set of cpus to run on. Must not include the current cpu. + * @func: The function to run. This must be fast and non-blocking. + * @info: An arbitrary pointer to pass to the function. + * @wait: If true, wait (atomically) until function has completed on other CPUs. + * + * Returns 0 on success, else a negative status code. + * + * If @wait is true, then returns once @func has returned; otherwise + * it returns just before the target cpu calls @func. + * + * You must not call this function with disabled interrupts or from a + * hardware interrupt handler or from a bottom half handler. + */ +int +smp_call_function_mask(cpumask_t mask, + void (*func)(void *), void *info, + int wait) +{ + preempt_disable(); + __smp_call_function_map(func, info, 0, wait, mask); + preempt_enable(); + return 0; +} +EXPORT_SYMBOL(smp_call_function_mask); + void smp_send_stop(void) { int cpu, rc; @@ -217,33 +261,6 @@ void smp_send_stop(void) } /* - * Reboot, halt and power_off routines for SMP. - */ -void machine_restart_smp(char *__unused) -{ - smp_send_stop(); - do_reipl(); -} - -void machine_halt_smp(void) -{ - smp_send_stop(); - if (MACHINE_IS_VM && strlen(vmhalt_cmd) > 0) - __cpcmd(vmhalt_cmd, NULL, 0, NULL); - signal_processor(smp_processor_id(), sigp_stop_and_store_status); - for (;;); -} - -void machine_power_off_smp(void) -{ - smp_send_stop(); - if (MACHINE_IS_VM && strlen(vmpoff_cmd) > 0) - __cpcmd(vmpoff_cmd, NULL, 0, NULL); - signal_processor(smp_processor_id(), sigp_stop_and_store_status); - for (;;); -} - -/* * This is the main routine where commands issued by other * cpus are handled. */ @@ -355,6 +372,13 @@ void smp_ctl_clear_bit(int cr, int bit) } EXPORT_SYMBOL(smp_ctl_clear_bit); +/* + * In early ipl state a temp. logically cpu number is needed, so the sigp + * functions can be used to sense other cpus. Since NR_CPUS is >= 2 on + * CONFIG_SMP and the ipl cpu is logical cpu 0, it must be 1. + */ +#define CPU_INIT_NO 1 + #if defined(CONFIG_ZFCPDUMP) || defined(CONFIG_ZFCPDUMP_MODULE) /* @@ -375,9 +399,10 @@ static void __init smp_get_save_area(unsigned int cpu, unsigned int phy_cpu) "kernel was compiled with NR_CPUS=%i\n", cpu, NR_CPUS); return; } - zfcpdump_save_areas[cpu] = alloc_bootmem(sizeof(union save_area)); - __cpu_logical_map[1] = (__u16) phy_cpu; - while (signal_processor(1, sigp_stop_and_store_status) == sigp_busy) + zfcpdump_save_areas[cpu] = kmalloc(sizeof(union save_area), GFP_KERNEL); + __cpu_logical_map[CPU_INIT_NO] = (__u16) phy_cpu; + while (signal_processor(CPU_INIT_NO, sigp_stop_and_store_status) == + sigp_busy) cpu_relax(); memcpy(zfcpdump_save_areas[cpu], (void *)(unsigned long) store_prefix() + SAVE_AREA_BASE, @@ -397,32 +422,155 @@ static inline void smp_get_save_area(unsigned int cpu, unsigned int phy_cpu) { } #endif /* CONFIG_ZFCPDUMP || CONFIG_ZFCPDUMP_MODULE */ -/* - * Lets check how many CPUs we have. - */ -static unsigned int __init smp_count_cpus(void) +static int cpu_stopped(int cpu) { - unsigned int cpu, num_cpus; - __u16 boot_cpu_addr; + __u32 status; - /* - * cpu 0 is the boot cpu. See smp_prepare_boot_cpu. - */ + /* Check for stopped state */ + if (signal_processor_ps(&status, 0, cpu, sigp_sense) == + sigp_status_stored) { + if (status & 0x40) + return 1; + } + return 0; +} + +static int cpu_known(int cpu_id) +{ + int cpu; + + for_each_present_cpu(cpu) { + if (__cpu_logical_map[cpu] == cpu_id) + return 1; + } + return 0; +} + +static int smp_rescan_cpus_sigp(cpumask_t avail) +{ + int cpu_id, logical_cpu; + + logical_cpu = first_cpu(avail); + if (logical_cpu == NR_CPUS) + return 0; + for (cpu_id = 0; cpu_id <= 65535; cpu_id++) { + if (cpu_known(cpu_id)) + continue; + __cpu_logical_map[logical_cpu] = cpu_id; + if (!cpu_stopped(logical_cpu)) + continue; + cpu_set(logical_cpu, cpu_present_map); + smp_cpu_state[logical_cpu] = CPU_STATE_CONFIGURED; + logical_cpu = next_cpu(logical_cpu, avail); + if (logical_cpu == NR_CPUS) + break; + } + return 0; +} + +static int smp_rescan_cpus_sclp(cpumask_t avail) +{ + struct sclp_cpu_info *info; + int cpu_id, logical_cpu, cpu; + int rc; + + logical_cpu = first_cpu(avail); + if (logical_cpu == NR_CPUS) + return 0; + info = kmalloc(sizeof(*info), GFP_KERNEL); + if (!info) + return -ENOMEM; + rc = sclp_get_cpu_info(info); + if (rc) + goto out; + for (cpu = 0; cpu < info->combined; cpu++) { + if (info->has_cpu_type && info->cpu[cpu].type != smp_cpu_type) + continue; + cpu_id = info->cpu[cpu].address; + if (cpu_known(cpu_id)) + continue; + __cpu_logical_map[logical_cpu] = cpu_id; + cpu_set(logical_cpu, cpu_present_map); + if (cpu >= info->configured) + smp_cpu_state[logical_cpu] = CPU_STATE_STANDBY; + else + smp_cpu_state[logical_cpu] = CPU_STATE_CONFIGURED; + logical_cpu = next_cpu(logical_cpu, avail); + if (logical_cpu == NR_CPUS) + break; + } +out: + kfree(info); + return rc; +} + +static int smp_rescan_cpus(void) +{ + cpumask_t avail; + + cpus_xor(avail, cpu_possible_map, cpu_present_map); + if (smp_use_sigp_detection) + return smp_rescan_cpus_sigp(avail); + else + return smp_rescan_cpus_sclp(avail); +} + +static void __init smp_detect_cpus(void) +{ + unsigned int cpu, c_cpus, s_cpus; + struct sclp_cpu_info *info; + u16 boot_cpu_addr, cpu_addr; + + c_cpus = 1; + s_cpus = 0; boot_cpu_addr = S390_lowcore.cpu_data.cpu_addr; - current_thread_info()->cpu = 0; - num_cpus = 1; - for (cpu = 0; cpu <= 65535; cpu++) { - if ((__u16) cpu == boot_cpu_addr) + info = kmalloc(sizeof(*info), GFP_KERNEL); + if (!info) + panic("smp_detect_cpus failed to allocate memory\n"); + /* Use sigp detection algorithm if sclp doesn't work. */ + if (sclp_get_cpu_info(info)) { + smp_use_sigp_detection = 1; + for (cpu = 0; cpu <= 65535; cpu++) { + if (cpu == boot_cpu_addr) + continue; + __cpu_logical_map[CPU_INIT_NO] = cpu; + if (!cpu_stopped(CPU_INIT_NO)) + continue; + smp_get_save_area(c_cpus, cpu); + c_cpus++; + } + goto out; + } + + if (info->has_cpu_type) { + for (cpu = 0; cpu < info->combined; cpu++) { + if (info->cpu[cpu].address == boot_cpu_addr) { + smp_cpu_type = info->cpu[cpu].type; + break; + } + } + } + + for (cpu = 0; cpu < info->combined; cpu++) { + if (info->has_cpu_type && info->cpu[cpu].type != smp_cpu_type) + continue; + cpu_addr = info->cpu[cpu].address; + if (cpu_addr == boot_cpu_addr) continue; - __cpu_logical_map[1] = (__u16) cpu; - if (signal_processor(1, sigp_sense) == sigp_not_operational) + __cpu_logical_map[CPU_INIT_NO] = cpu_addr; + if (!cpu_stopped(CPU_INIT_NO)) { + s_cpus++; continue; - smp_get_save_area(num_cpus, cpu); - num_cpus++; + } + smp_get_save_area(c_cpus, cpu_addr); + c_cpus++; } - printk("Detected %d CPU's\n", (int) num_cpus); - printk("Boot cpu address %2X\n", boot_cpu_addr); - return num_cpus; +out: + kfree(info); + printk(KERN_INFO "CPUs: %d configured, %d standby\n", c_cpus, s_cpus); + get_online_cpus(); + smp_rescan_cpus(); + put_online_cpus(); } /* @@ -453,8 +601,6 @@ int __cpuinit start_secondary(void *cpuvoid) return 0; } -DEFINE_PER_CPU(struct s390_idle_data, s390_idle); - static void __init smp_create_idle(unsigned int cpu) { struct task_struct *p; @@ -470,37 +616,82 @@ static void __init smp_create_idle(unsigned int cpu) spin_lock_init(&(&per_cpu(s390_idle, cpu))->lock); } -static int cpu_stopped(int cpu) +static int __cpuinit smp_alloc_lowcore(int cpu) { - __u32 status; + unsigned long async_stack, panic_stack; + struct _lowcore *lowcore; + int lc_order; + + lc_order = sizeof(long) == 8 ? 1 : 0; + lowcore = (void *) __get_free_pages(GFP_KERNEL | GFP_DMA, lc_order); + if (!lowcore) + return -ENOMEM; + async_stack = __get_free_pages(GFP_KERNEL, ASYNC_ORDER); + if (!async_stack) + goto out_async_stack; + panic_stack = __get_free_page(GFP_KERNEL); + if (!panic_stack) + goto out_panic_stack; + + *lowcore = S390_lowcore; + lowcore->async_stack = async_stack + ASYNC_SIZE; + lowcore->panic_stack = panic_stack + PAGE_SIZE; - /* Check for stopped state */ - if (signal_processor_ps(&status, 0, cpu, sigp_sense) == - sigp_status_stored) { - if (status & 0x40) - return 1; +#ifndef CONFIG_64BIT + if (MACHINE_HAS_IEEE) { + unsigned long save_area; + + save_area = get_zeroed_page(GFP_KERNEL); + if (!save_area) + goto out_save_area; + lowcore->extended_save_area_addr = (u32) save_area; } +#endif + lowcore_ptr[cpu] = lowcore; return 0; + +#ifndef CONFIG_64BIT +out_save_area: + free_page(panic_stack); +#endif +out_panic_stack: + free_pages(async_stack, ASYNC_ORDER); +out_async_stack: + free_pages((unsigned long) lowcore, lc_order); + return -ENOMEM; } -/* Upping and downing of CPUs */ +#ifdef CONFIG_HOTPLUG_CPU +static void smp_free_lowcore(int cpu) +{ + struct _lowcore *lowcore; + int lc_order; + + lc_order = sizeof(long) == 8 ? 1 : 0; + lowcore = lowcore_ptr[cpu]; +#ifndef CONFIG_64BIT + if (MACHINE_HAS_IEEE) + free_page((unsigned long) lowcore->extended_save_area_addr); +#endif + free_page(lowcore->panic_stack - PAGE_SIZE); + free_pages(lowcore->async_stack - ASYNC_SIZE, ASYNC_ORDER); + free_pages((unsigned long) lowcore, lc_order); + lowcore_ptr[cpu] = NULL; +} +#endif /* CONFIG_HOTPLUG_CPU */ -int __cpu_up(unsigned int cpu) +/* Upping and downing of CPUs */ +int __cpuinit __cpu_up(unsigned int cpu) { struct task_struct *idle; struct _lowcore *cpu_lowcore; struct stack_frame *sf; sigp_ccode ccode; - int curr_cpu; - for (curr_cpu = 0; curr_cpu <= 65535; curr_cpu++) { - __cpu_logical_map[cpu] = (__u16) curr_cpu; - if (cpu_stopped(cpu)) - break; - } - - if (!cpu_stopped(cpu)) - return -ENODEV; + if (smp_cpu_state[cpu] != CPU_STATE_CONFIGURED) + return -EIO; + if (smp_alloc_lowcore(cpu)) + return -ENOMEM; ccode = signal_processor_p((__u32)(unsigned long)(lowcore_ptr[cpu]), cpu, sigp_set_prefix); @@ -515,6 +706,7 @@ int __cpu_up(unsigned int cpu) cpu_lowcore = lowcore_ptr[cpu]; cpu_lowcore->kernel_stack = (unsigned long) task_stack_page(idle) + THREAD_SIZE; + cpu_lowcore->thread_info = (unsigned long) task_thread_info(idle); sf = (struct stack_frame *) (cpu_lowcore->kernel_stack - sizeof(struct pt_regs) - sizeof(struct stack_frame)); @@ -528,6 +720,8 @@ int __cpu_up(unsigned int cpu) cpu_lowcore->percpu_offset = __per_cpu_offset[cpu]; cpu_lowcore->current_task = (unsigned long) idle; cpu_lowcore->cpu_data.cpu_nr = cpu; + cpu_lowcore->softirq_pending = 0; + cpu_lowcore->ext_call_fast = 0; eieio(); while (signal_processor(cpu, sigp_restart) == sigp_busy) @@ -538,44 +732,20 @@ int __cpu_up(unsigned int cpu) return 0; } -static unsigned int __initdata additional_cpus; -static unsigned int __initdata possible_cpus; - -void __init smp_setup_cpu_possible_map(void) +static int __init setup_possible_cpus(char *s) { - unsigned int phy_cpus, pos_cpus, cpu; - - phy_cpus = smp_count_cpus(); - pos_cpus = min(phy_cpus + additional_cpus, (unsigned int) NR_CPUS); - - if (possible_cpus) - pos_cpus = min(possible_cpus, (unsigned int) NR_CPUS); + int pcpus, cpu; - for (cpu = 0; cpu < pos_cpus; cpu++) + pcpus = simple_strtoul(s, NULL, 0); + cpu_possible_map = cpumask_of_cpu(0); + for (cpu = 1; cpu < pcpus && cpu < NR_CPUS; cpu++) cpu_set(cpu, cpu_possible_map); - - phy_cpus = min(phy_cpus, pos_cpus); - - for (cpu = 0; cpu < phy_cpus; cpu++) - cpu_set(cpu, cpu_present_map); -} - -#ifdef CONFIG_HOTPLUG_CPU - -static int __init setup_additional_cpus(char *s) -{ - additional_cpus = simple_strtoul(s, NULL, 0); - return 0; -} -early_param("additional_cpus", setup_additional_cpus); - -static int __init setup_possible_cpus(char *s) -{ - possible_cpus = simple_strtoul(s, NULL, 0); return 0; } early_param("possible_cpus", setup_possible_cpus); +#ifdef CONFIG_HOTPLUG_CPU + int __cpu_disable(void) { struct ec_creg_mask_parms cr_parms; @@ -612,7 +782,8 @@ void __cpu_die(unsigned int cpu) /* Wait until target cpu is down */ while (!smp_cpu_not_running(cpu)) cpu_relax(); - printk("Processor %d spun down\n", cpu); + smp_free_lowcore(cpu); + printk(KERN_INFO "Processor %d spun down\n", cpu); } void cpu_die(void) @@ -625,49 +796,19 @@ void cpu_die(void) #endif /* CONFIG_HOTPLUG_CPU */ -/* - * Cycle through the processors and setup structures. - */ - void __init smp_prepare_cpus(unsigned int max_cpus) { - unsigned long stack; unsigned int cpu; - int i; + + smp_detect_cpus(); /* request the 0x1201 emergency signal external interrupt */ if (register_external_interrupt(0x1201, do_ext_call_interrupt) != 0) panic("Couldn't request external interrupt 0x1201"); memset(lowcore_ptr, 0, sizeof(lowcore_ptr)); - /* - * Initialize prefix pages and stacks for all possible cpus - */ print_cpu_info(&S390_lowcore.cpu_data); + smp_alloc_lowcore(smp_processor_id()); - for_each_possible_cpu(i) { - lowcore_ptr[i] = (struct _lowcore *) - __get_free_pages(GFP_KERNEL | GFP_DMA, - sizeof(void*) == 8 ? 1 : 0); - stack = __get_free_pages(GFP_KERNEL, ASYNC_ORDER); - if (!lowcore_ptr[i] || !stack) - panic("smp_boot_cpus failed to allocate memory\n"); - - *(lowcore_ptr[i]) = S390_lowcore; - lowcore_ptr[i]->async_stack = stack + ASYNC_SIZE; - stack = __get_free_pages(GFP_KERNEL, 0); - if (!stack) - panic("smp_boot_cpus failed to allocate memory\n"); - lowcore_ptr[i]->panic_stack = stack + PAGE_SIZE; -#ifndef CONFIG_64BIT - if (MACHINE_HAS_IEEE) { - lowcore_ptr[i]->extended_save_area_addr = - (__u32) __get_free_pages(GFP_KERNEL, 0); - if (!lowcore_ptr[i]->extended_save_area_addr) - panic("smp_boot_cpus failed to " - "allocate memory\n"); - } -#endif - } #ifndef CONFIG_64BIT if (MACHINE_HAS_IEEE) ctl_set_bit(14, 29); /* enable extended save area */ @@ -683,15 +824,17 @@ void __init smp_prepare_boot_cpu(void) { BUG_ON(smp_processor_id() != 0); + current_thread_info()->cpu = 0; + cpu_set(0, cpu_present_map); cpu_set(0, cpu_online_map); S390_lowcore.percpu_offset = __per_cpu_offset[0]; current_set[0] = current; + smp_cpu_state[0] = CPU_STATE_CONFIGURED; spin_lock_init(&(&__get_cpu_var(s390_idle))->lock); } void __init smp_cpus_done(unsigned int max_cpus) { - cpu_present_map = cpu_possible_map; } /* @@ -705,7 +848,79 @@ int setup_profiling_timer(unsigned int multiplier) return 0; } -static DEFINE_PER_CPU(struct cpu, cpu_devices); +#ifdef CONFIG_HOTPLUG_CPU +static ssize_t cpu_configure_show(struct sys_device *dev, char *buf) +{ + ssize_t count; + + mutex_lock(&smp_cpu_state_mutex); + count = sprintf(buf, "%d\n", smp_cpu_state[dev->id]); + mutex_unlock(&smp_cpu_state_mutex); + return count; +} + +static ssize_t cpu_configure_store(struct sys_device *dev, const char *buf, + size_t count) +{ + int cpu = dev->id; + int val, rc; + char delim; + + if (sscanf(buf, "%d %c", &val, &delim) != 1) + return -EINVAL; + if (val != 0 && val != 1) + return -EINVAL; + + mutex_lock(&smp_cpu_state_mutex); + get_online_cpus(); + rc = -EBUSY; + if (cpu_online(cpu)) + goto out; + rc = 0; + switch (val) { + case 0: + if (smp_cpu_state[cpu] == CPU_STATE_CONFIGURED) { + rc = sclp_cpu_deconfigure(__cpu_logical_map[cpu]); + if (!rc) + smp_cpu_state[cpu] = CPU_STATE_STANDBY; + } + break; + case 1: + if (smp_cpu_state[cpu] == CPU_STATE_STANDBY) { + rc = sclp_cpu_configure(__cpu_logical_map[cpu]); + if (!rc) + smp_cpu_state[cpu] = CPU_STATE_CONFIGURED; + } + break; + default: + break; + } +out: + put_online_cpus(); + mutex_unlock(&smp_cpu_state_mutex); + return rc ? rc : count; +} +static SYSDEV_ATTR(configure, 0644, cpu_configure_show, cpu_configure_store); +#endif /* CONFIG_HOTPLUG_CPU */ + +static ssize_t show_cpu_address(struct sys_device *dev, char *buf) +{ + return sprintf(buf, "%d\n", __cpu_logical_map[dev->id]); +} +static SYSDEV_ATTR(address, 0444, show_cpu_address, NULL); + + +static struct attribute *cpu_common_attrs[] = { +#ifdef CONFIG_HOTPLUG_CPU + &attr_configure.attr, +#endif + &attr_address.attr, + NULL, +}; + +static struct attribute_group cpu_common_attr_group = { + .attrs = cpu_common_attrs, +}; static ssize_t show_capability(struct sys_device *dev, char *buf) { @@ -750,15 +965,15 @@ static ssize_t show_idle_time(struct sys_device *dev, char *buf) } static SYSDEV_ATTR(idle_time_us, 0444, show_idle_time, NULL); -static struct attribute *cpu_attrs[] = { +static struct attribute *cpu_online_attrs[] = { &attr_capability.attr, &attr_idle_count.attr, &attr_idle_time_us.attr, NULL, }; -static struct attribute_group cpu_attr_group = { - .attrs = cpu_attrs, +static struct attribute_group cpu_online_attr_group = { + .attrs = cpu_online_attrs, }; static int __cpuinit smp_cpu_notify(struct notifier_block *self, @@ -778,12 +993,12 @@ static int __cpuinit smp_cpu_notify(struct notifier_block *self, idle->idle_time = 0; idle->idle_count = 0; spin_unlock_irq(&idle->lock); - if (sysfs_create_group(&s->kobj, &cpu_attr_group)) + if (sysfs_create_group(&s->kobj, &cpu_online_attr_group)) return NOTIFY_BAD; break; case CPU_DEAD: case CPU_DEAD_FROZEN: - sysfs_remove_group(&s->kobj, &cpu_attr_group); + sysfs_remove_group(&s->kobj, &cpu_online_attr_group); break; } return NOTIFY_OK; @@ -793,6 +1008,62 @@ static struct notifier_block __cpuinitdata smp_cpu_nb = { .notifier_call = smp_cpu_notify, }; +static int smp_add_present_cpu(int cpu) +{ + struct cpu *c = &per_cpu(cpu_devices, cpu); + struct sys_device *s = &c->sysdev; + int rc; + + c->hotpluggable = 1; + rc = register_cpu(c, cpu); + if (rc) + goto out; + rc = sysfs_create_group(&s->kobj, &cpu_common_attr_group); + if (rc) + goto out_cpu; + if (!cpu_online(cpu)) + goto out; + rc = sysfs_create_group(&s->kobj, &cpu_online_attr_group); + if (!rc) + return 0; + sysfs_remove_group(&s->kobj, &cpu_common_attr_group); +out_cpu: +#ifdef CONFIG_HOTPLUG_CPU + unregister_cpu(c); +#endif +out: + return rc; +} + +#ifdef CONFIG_HOTPLUG_CPU +static ssize_t rescan_store(struct sys_device *dev, const char *buf, + size_t count) +{ + cpumask_t newcpus; + int cpu; + int rc; + + mutex_lock(&smp_cpu_state_mutex); + get_online_cpus(); + newcpus = cpu_present_map; + rc = smp_rescan_cpus(); + if (rc) + goto out; + cpus_andnot(newcpus, cpu_present_map, newcpus); + for_each_cpu_mask(cpu, newcpus) { + rc = smp_add_present_cpu(cpu); + if (rc) + cpu_clear(cpu, cpu_present_map); + } + rc = 0; +out: + put_online_cpus(); + mutex_unlock(&smp_cpu_state_mutex); + return rc ? rc : count; +} +static SYSDEV_ATTR(rescan, 0200, NULL, rescan_store); +#endif /* CONFIG_HOTPLUG_CPU */ + static int __init topology_init(void) { int cpu; @@ -800,16 +1071,14 @@ static int __init topology_init(void) register_cpu_notifier(&smp_cpu_nb); - for_each_possible_cpu(cpu) { - struct cpu *c = &per_cpu(cpu_devices, cpu); - struct sys_device *s = &c->sysdev; - - c->hotpluggable = 1; - register_cpu(c, cpu); - if (!cpu_online(cpu)) - continue; - s = &c->sysdev; - rc = sysfs_create_group(&s->kobj, &cpu_attr_group); +#ifdef CONFIG_HOTPLUG_CPU + rc = sysfs_create_file(&cpu_sysdev_class.kset.kobj, + &attr_rescan.attr); + if (rc) + return rc; +#endif + for_each_present_cpu(cpu) { + rc = smp_add_present_cpu(cpu); if (rc) return rc; } diff --git a/arch/s390/kernel/traps.c b/arch/s390/kernel/traps.c index 8ed16a83fba7..52b8342c6bf2 100644 --- a/arch/s390/kernel/traps.c +++ b/arch/s390/kernel/traps.c @@ -31,6 +31,7 @@ #include <linux/reboot.h> #include <linux/kprobes.h> #include <linux/bug.h> +#include <linux/utsname.h> #include <asm/system.h> #include <asm/uaccess.h> #include <asm/io.h> @@ -168,9 +169,16 @@ void show_stack(struct task_struct *task, unsigned long *sp) */ void dump_stack(void) { + printk("CPU: %d %s %s %.*s\n", + task_thread_info(current)->cpu, print_tainted(), + init_utsname()->release, + (int)strcspn(init_utsname()->version, " "), + init_utsname()->version); + printk("Process %s (pid: %d, task: %p, ksp: %p)\n", + current->comm, current->pid, current, + (void *) current->thread.ksp); show_stack(NULL, NULL); } - EXPORT_SYMBOL(dump_stack); static inline int mask_bits(struct pt_regs *regs, unsigned long bits) @@ -258,8 +266,14 @@ void die(const char * str, struct pt_regs * regs, long err) console_verbose(); spin_lock_irq(&die_lock); bust_spinlocks(1); - printk("%s: %04lx [#%d]\n", str, err & 0xffff, ++die_counter); - print_modules(); + printk("%s: %04lx [#%d] ", str, err & 0xffff, ++die_counter); +#ifdef CONFIG_PREEMPT + printk("PREEMPT "); +#endif +#ifdef CONFIG_SMP + printk("SMP"); +#endif + printk("\n"); notify_die(DIE_OOPS, str, regs, err, current->thread.trap_no, SIGSEGV); show_regs(regs); bust_spinlocks(0); diff --git a/arch/s390/kernel/vmlinux.lds.S b/arch/s390/kernel/vmlinux.lds.S index 849120e3e28a..936159199346 100644 --- a/arch/s390/kernel/vmlinux.lds.S +++ b/arch/s390/kernel/vmlinux.lds.S @@ -17,6 +17,12 @@ ENTRY(_start) jiffies = jiffies_64; #endif +PHDRS { + text PT_LOAD FLAGS(5); /* R_E */ + data PT_LOAD FLAGS(7); /* RWE */ + note PT_NOTE FLAGS(0); /* ___ */ +} + SECTIONS { . = 0x00000000; @@ -33,6 +39,9 @@ SECTIONS _etext = .; /* End of text section */ + NOTES :text :note + BUG_TABLE :text + RODATA #ifdef CONFIG_SHARED_KERNEL @@ -49,9 +58,6 @@ SECTIONS __stop___ex_table = .; } - NOTES - BUG_TABLE - .data : { /* Data */ DATA_DATA CONSTRUCTORS |