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Diffstat (limited to 'arch/s390/kernel/ipl.c')
-rw-r--r--arch/s390/kernel/ipl.c209
1 files changed, 140 insertions, 69 deletions
diff --git a/arch/s390/kernel/ipl.c b/arch/s390/kernel/ipl.c
index a689070be28..633ca750453 100644
--- a/arch/s390/kernel/ipl.c
+++ b/arch/s390/kernel/ipl.c
@@ -1,8 +1,7 @@
/*
- * 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>
@@ -16,6 +15,8 @@
#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>
@@ -24,8 +25,10 @@
#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
@@ -45,11 +48,13 @@
* - 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 {
@@ -273,8 +278,8 @@ static ssize_t ipl_type_show(struct kobject *kobj, struct kobj_attribute *attr,
static struct kobj_attribute sys_ipl_type_attr = __ATTR_RO(ipl_type);
/* VM IPL PARM routines */
-size_t reipl_get_ascii_vmparm(char *dest, size_t size,
- const struct ipl_parameter_block *ipb)
+static size_t reipl_get_ascii_vmparm(char *dest, size_t size,
+ const struct ipl_parameter_block *ipb)
{
int i;
size_t len;
@@ -336,8 +341,8 @@ static size_t scpdata_length(const char* buf, size_t count)
return count;
}
-size_t reipl_append_ascii_scpdata(char *dest, size_t size,
- const struct ipl_parameter_block *ipb)
+static size_t reipl_append_ascii_scpdata(char *dest, size_t size,
+ const struct ipl_parameter_block *ipb)
{
size_t count;
size_t i;
@@ -567,7 +572,7 @@ 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)
@@ -749,9 +754,9 @@ static struct bin_attribute sys_reipl_fcp_scp_data_attr = {
.write = reipl_fcp_scpdata_write,
};
-DEFINE_IPL_ATTR_RW(reipl_fcp, wwpn, "0x%016llx\n", "%016llx\n",
+DEFINE_IPL_ATTR_RW(reipl_fcp, wwpn, "0x%016llx\n", "%llx\n",
reipl_block_fcp->ipl_info.fcp.wwpn);
-DEFINE_IPL_ATTR_RW(reipl_fcp, lun, "0x%016llx\n", "%016llx\n",
+DEFINE_IPL_ATTR_RW(reipl_fcp, lun, "0x%016llx\n", "%llx\n",
reipl_block_fcp->ipl_info.fcp.lun);
DEFINE_IPL_ATTR_RW(reipl_fcp, bootprog, "%lld\n", "%lld\n",
reipl_block_fcp->ipl_info.fcp.bootprog);
@@ -946,6 +951,13 @@ 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)
@@ -961,7 +973,7 @@ 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)
@@ -970,7 +982,7 @@ 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;
@@ -980,7 +992,7 @@ 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;
@@ -1097,7 +1109,7 @@ 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)
@@ -1218,7 +1230,7 @@ static int __init reipl_fcp_init(void)
/* 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_kset) {
+ if (!reipl_fcp_kset) {
free_page((unsigned long) reipl_block_fcp);
return -ENOMEM;
}
@@ -1252,6 +1264,29 @@ 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;
@@ -1273,10 +1308,7 @@ 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 = {
@@ -1291,9 +1323,9 @@ static struct shutdown_action __refdata reipl_action = {
/* FCP dump device attributes */
-DEFINE_IPL_ATTR_RW(dump_fcp, wwpn, "0x%016llx\n", "%016llx\n",
+DEFINE_IPL_ATTR_RW(dump_fcp, wwpn, "0x%016llx\n", "%llx\n",
dump_block_fcp->ipl_info.fcp.wwpn);
-DEFINE_IPL_ATTR_RW(dump_fcp, lun, "0x%016llx\n", "%016llx\n",
+DEFINE_IPL_ATTR_RW(dump_fcp, lun, "0x%016llx\n", "%llx\n",
dump_block_fcp->ipl_info.fcp.lun);
DEFINE_IPL_ATTR_RW(dump_fcp, bootprog, "%lld\n", "%lld\n",
dump_block_fcp->ipl_info.fcp.bootprog);
@@ -1382,6 +1414,16 @@ static struct kobj_attribute dump_type_attr =
static struct kset *dump_kset;
+static void diag308_dump(void *dump_block)
+{
+ diag308(DIAG308_SET, dump_block);
+ while (1) {
+ if (diag308(DIAG308_DUMP, NULL) != 0x302)
+ break;
+ udelay_simple(USEC_PER_SEC);
+ }
+}
+
static void __dump_run(void *unused)
{
struct ccw_dev_id devid;
@@ -1400,12 +1442,10 @@ static void __dump_run(void *unused)
__cpcmd(buf, NULL, 0, NULL);
break;
case DUMP_METHOD_CCW_DIAG:
- diag308(DIAG308_SET, dump_block_ccw);
- diag308(DIAG308_DUMP, NULL);
+ diag308_dump(dump_block_ccw);
break;
case DUMP_METHOD_FCP_DIAG:
- diag308(DIAG308_SET, dump_block_fcp);
- diag308(DIAG308_DUMP, NULL);
+ diag308_dump(dump_block_fcp);
break;
default:
break;
@@ -1417,7 +1457,7 @@ 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)
@@ -1495,30 +1535,12 @@ 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();
+ unsigned long ipib = (unsigned long) reipl_block_actual;
+ unsigned int csum;
+
+ csum = csum_partial(reipl_block_actual, reipl_block_actual->hdr.len, 0);
+ mem_assign_absolute(S390_lowcore.ipib, ipib);
+ mem_assign_absolute(S390_lowcore.ipib_checksum, csum);
dump_run(trigger);
}
@@ -1544,17 +1566,20 @@ 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,
};
@@ -1566,7 +1591,7 @@ static struct kset *vmcmd_kset;
static void vmcmd_run(struct shutdown_trigger *trigger)
{
- char *cmd, *next_cmd;
+ char *cmd;
if (strcmp(trigger->name, ON_REIPL_STR) == 0)
cmd = vmcmd_on_reboot;
@@ -1576,20 +1601,14 @@ static void vmcmd_run(struct shutdown_trigger *trigger)
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);
+ __cpcmd(cmd, NULL, 0, NULL);
}
static int vmcmd_init(void)
@@ -1611,11 +1630,10 @@ static struct shutdown_action vmcmd_action = {SHUTDOWN_ACTION_VMCMD_STR,
static void stop_run(struct shutdown_trigger *trigger)
{
- if (strcmp(trigger->name, ON_PANIC_STR) == 0)
+ 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,
@@ -1703,10 +1721,51 @@ 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);
}
+/* on restart */
+
+static struct shutdown_trigger on_restart_trigger = {ON_RESTART_STR,
+ &stop_action};
+
+static ssize_t on_restart_show(struct kobject *kobj,
+ struct kobj_attribute *attr, char *page)
+{
+ return sprintf(page, "%s\n", on_restart_trigger.action->name);
+}
+
+static ssize_t on_restart_store(struct kobject *kobj,
+ struct kobj_attribute *attr,
+ const char *buf, size_t len)
+{
+ return set_trigger(buf, &on_restart_trigger, len);
+}
+
+static struct kobj_attribute on_restart_attr =
+ __ATTR(on_restart, 0644, on_restart_show, on_restart_store);
+
+static void __do_restart(void *ignore)
+{
+ __arch_local_irq_stosm(0x04); /* enable DAT */
+ smp_send_stop();
+#ifdef CONFIG_CRASH_DUMP
+ crash_kexec(NULL);
+#endif
+ on_restart_trigger.action->fn(&on_restart_trigger);
+ stop_run(&on_restart_trigger);
+}
+
+void do_restart(void)
+{
+ tracing_off();
+ debug_locks_off();
+ lgr_info_log();
+ smp_call_online_cpu(__do_restart, NULL);
+}
+
/* on halt */
static struct shutdown_trigger on_halt_trigger = {ON_HALT_STR, &stop_action};
@@ -1783,7 +1842,9 @@ static void __init shutdown_triggers_init(void)
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");
@@ -1959,13 +2020,19 @@ 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)
+void s390_reset_system(void (*func)(void *), void *data)
{
struct _lowcore *lc;
@@ -1984,15 +2051,19 @@ void s390_reset_system(void)
__ctl_clear_bit(0,28);
/* Set new machine check handler */
- S390_lowcore.mcck_new_psw.mask = psw_kernel_bits & ~PSW_MASK_MCHECK;
+ 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_MCHECK;
+ 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);
}
-
generated by cgit v1.2.3-70-g09d2 (git 2.46.0) at 2025-11-09 20:23:18 +0000