diff options
Diffstat (limited to 'arch/s390/kernel/ipl.c')
| -rw-r--r-- | arch/s390/kernel/ipl.c | 99 |
1 files changed, 58 insertions, 41 deletions
diff --git a/arch/s390/kernel/ipl.c b/arch/s390/kernel/ipl.c index affa8e68124a..8342e65a140d 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 IBM Corp. 2005,2007 + * 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> @@ -17,6 +17,7 @@ #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> @@ -25,8 +26,9 @@ #include <asm/ebcdic.h> #include <asm/reset.h> #include <asm/sclp.h> -#include <asm/sigp.h> #include <asm/checksum.h> +#include <asm/debug.h> +#include <asm/os_info.h> #include "entry.h" #define IPL_PARM_BLOCK_VERSION 0 @@ -571,7 +573,7 @@ static void __ipl_run(void *unused) static void ipl_run(struct shutdown_trigger *trigger) { - smp_switch_to_ipl_cpu(__ipl_run, NULL); + smp_call_ipl_cpu(__ipl_run, NULL); } static int __init ipl_init(void) @@ -950,6 +952,13 @@ static struct attribute_group reipl_nss_attr_group = { .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) @@ -965,7 +974,7 @@ static int reipl_set_type(enum ipl_type type) reipl_method = REIPL_METHOD_CCW_VM; else reipl_method = REIPL_METHOD_CCW_CIO; - reipl_block_actual = reipl_block_ccw; + set_reipl_block_actual(reipl_block_ccw); break; case IPL_TYPE_FCP: if (diag308_set_works) @@ -974,7 +983,7 @@ static int reipl_set_type(enum ipl_type type) reipl_method = REIPL_METHOD_FCP_RO_VM; else reipl_method = REIPL_METHOD_FCP_RO_DIAG; - reipl_block_actual = reipl_block_fcp; + set_reipl_block_actual(reipl_block_fcp); break; case IPL_TYPE_FCP_DUMP: reipl_method = REIPL_METHOD_FCP_DUMP; @@ -984,7 +993,7 @@ static int reipl_set_type(enum ipl_type type) reipl_method = REIPL_METHOD_NSS_DIAG; else reipl_method = REIPL_METHOD_NSS; - reipl_block_actual = reipl_block_nss; + set_reipl_block_actual(reipl_block_nss); break; case IPL_TYPE_UNKNOWN: reipl_method = REIPL_METHOD_DEFAULT; @@ -1101,7 +1110,7 @@ static void __reipl_run(void *unused) static void reipl_run(struct shutdown_trigger *trigger) { - smp_switch_to_ipl_cpu(__reipl_run, NULL); + smp_call_ipl_cpu(__reipl_run, NULL); } static void reipl_block_ccw_init(struct ipl_parameter_block *ipb) @@ -1256,6 +1265,29 @@ static int __init reipl_fcp_init(void) 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; @@ -1277,10 +1309,7 @@ static int __init reipl_init(void) rc = reipl_nss_init(); if (rc) return rc; - rc = reipl_set_type(ipl_info.type); - if (rc) - return rc; - return 0; + return reipl_type_init(); } static struct shutdown_action __refdata reipl_action = { @@ -1421,7 +1450,7 @@ static void dump_run(struct shutdown_trigger *trigger) if (dump_method == DUMP_METHOD_NONE) return; smp_send_stop(); - smp_switch_to_ipl_cpu(__dump_run, NULL); + smp_call_ipl_cpu(__dump_run, NULL); } static int __init dump_ccw_init(void) @@ -1499,30 +1528,12 @@ static struct shutdown_action __refdata dump_action = { static void dump_reipl_run(struct shutdown_trigger *trigger) { - preempt_disable(); - /* - * Bypass dynamic address translation (DAT) when storing IPL parameter - * information block address and checksum into the prefix area - * (corresponding to absolute addresses 0-8191). - * When enhanced DAT applies and the STE format control in one, - * the absolute address is formed without prefixing. In this case a - * normal store (stg/st) into the prefix area would no more match to - * absolute addresses 0-8191. - */ -#ifdef CONFIG_64BIT - asm volatile("sturg %0,%1" - :: "a" ((unsigned long) reipl_block_actual), - "a" (&lowcore_ptr[smp_processor_id()]->ipib)); -#else - asm volatile("stura %0,%1" - :: "a" ((unsigned long) reipl_block_actual), - "a" (&lowcore_ptr[smp_processor_id()]->ipib)); -#endif - asm volatile("stura %0,%1" - :: "a" (csum_partial(reipl_block_actual, - reipl_block_actual->hdr.len, 0)), - "a" (&lowcore_ptr[smp_processor_id()]->ipib_checksum)); - preempt_enable(); + 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); } @@ -1623,9 +1634,7 @@ 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)); - while (sigp(smp_processor_id(), sigp_stop) == sigp_busy) - cpu_relax(); - for (;;); + smp_stop_cpu(); } static struct shutdown_action stop_action = {SHUTDOWN_ACTION_STOP_STR, @@ -1713,6 +1722,7 @@ static struct kobj_attribute on_panic_attr = static void do_panic(void) { + lgr_info_log(); on_panic_trigger.action->fn(&on_panic_trigger); stop_run(&on_panic_trigger); } @@ -1738,9 +1748,8 @@ static ssize_t on_restart_store(struct kobject *kobj, static struct kobj_attribute on_restart_attr = __ATTR(on_restart, 0644, on_restart_show, on_restart_store); -void do_restart(void) +static void __do_restart(void *ignore) { - smp_restart_with_online_cpu(); smp_send_stop(); #ifdef CONFIG_CRASH_DUMP crash_kexec(NULL); @@ -1749,6 +1758,14 @@ void do_restart(void) 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}; |