diff options
Diffstat (limited to 'arch/s390/kernel/ipl.c')
| -rw-r--r-- | arch/s390/kernel/ipl.c | 74 |
1 files changed, 61 insertions, 13 deletions
diff --git a/arch/s390/kernel/ipl.c b/arch/s390/kernel/ipl.c index 2dcf590faba6..6f3711a0eaaa 100644 --- a/arch/s390/kernel/ipl.c +++ b/arch/s390/kernel/ipl.c @@ -23,7 +23,7 @@ #include <asm/ebcdic.h> #include <asm/reset.h> #include <asm/sclp.h> -#include <asm/setup.h> +#include <asm/checksum.h> #define IPL_PARM_BLOCK_VERSION 0 @@ -56,13 +56,14 @@ struct shutdown_trigger { }; /* - * Five shutdown action types are supported: + * 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; @@ -146,6 +147,7 @@ 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; @@ -835,6 +837,7 @@ 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; break; case IPL_TYPE_FCP: if (diag308_set_works) @@ -843,6 +846,7 @@ 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; break; case IPL_TYPE_FCP_DUMP: reipl_method = REIPL_METHOD_FCP_DUMP; @@ -852,6 +856,7 @@ 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; break; case IPL_TYPE_UNKNOWN: reipl_method = REIPL_METHOD_DEFAULT; @@ -960,7 +965,6 @@ static void reipl_run(struct shutdown_trigger *trigger) diag308(DIAG308_IPL, NULL); break; case REIPL_METHOD_FCP_DUMP: - default: break; } disabled_wait((unsigned long) __builtin_return_address(0)); @@ -1069,10 +1073,12 @@ static int __init reipl_fcp_init(void) { int rc; - if ((!diag308_set_works) && (ipl_info.type != IPL_TYPE_FCP)) - return 0; - if ((!diag308_set_works) && (ipl_info.type == IPL_TYPE_FCP)) - make_attrs_ro(reipl_fcp_attrs); + if (!diag308_set_works) { + if (ipl_info.type == IPL_TYPE_FCP) + make_attrs_ro(reipl_fcp_attrs); + else + return 0; + } reipl_block_fcp = (void *) get_zeroed_page(GFP_KERNEL); if (!reipl_block_fcp) @@ -1253,7 +1259,6 @@ static void dump_run(struct shutdown_trigger *trigger) diag308(DIAG308_DUMP, NULL); break; case DUMP_METHOD_NONE: - default: return; } printk(KERN_EMERG "Dump failed!\n"); @@ -1332,6 +1337,49 @@ static struct shutdown_action __refdata dump_action = { .init = dump_init, }; +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(); + 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. */ @@ -1421,7 +1469,8 @@ static struct shutdown_action stop_action = {SHUTDOWN_ACTION_STOP_STR, /* action list */ static struct shutdown_action *shutdown_actions_list[] = { - &ipl_action, &reipl_action, &dump_action, &vmcmd_action, &stop_action}; + &ipl_action, &reipl_action, &dump_reipl_action, &dump_action, + &vmcmd_action, &stop_action}; #define SHUTDOWN_ACTIONS_COUNT (sizeof(shutdown_actions_list) / sizeof(void *)) /* @@ -1434,11 +1483,11 @@ 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) { + if (sysfs_streq(buf, shutdown_actions_list[i]->name)) { trigger->action = shutdown_actions_list[i]; return len; } @@ -1672,7 +1721,7 @@ static int on_panic_notify(struct notifier_block *self, static struct notifier_block on_panic_nb = { .notifier_call = on_panic_notify, - .priority = 0, + .priority = INT_MIN, }; void __init setup_ipl(void) @@ -1696,7 +1745,6 @@ void __init setup_ipl(void) sizeof(ipl_info.data.nss.name)); break; case IPL_TYPE_UNKNOWN: - default: /* We have no info to copy */ break; } |