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[S390] cpu shutdown rework

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Let one master cpu kill all other cpus instead of sending an external
interrupt to all other cpus so they can kill themselves.
Simplifies reipl/shutdown functions a lot.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Heiko Carstens
2006-12-04 15:40:33 +01:00
committed by Martin Schwidefsky
parent 740b5706b9
commit c6b5b847a7
5 changed files with 58 additions and 180 deletions
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24
arch/s390/kernel/ipl.c
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@@ -576,23 +576,6 @@ static struct subsys_attribute dump_type_attr =
static decl_subsys(dump, NULL, NULL);
#ifdef CONFIG_SMP
static void dump_smp_stop_all(void)
{
int cpu;
preempt_disable();
for_each_online_cpu(cpu) {
if (cpu == smp_processor_id())
continue;
while (signal_processor(cpu, sigp_stop) == sigp_busy)
udelay(10);
}
preempt_enable();
}
#else
#define dump_smp_stop_all() do { } while (0)
#endif
/*
* Shutdown actions section
*/
@@ -724,13 +707,13 @@ static void do_dump(void)
switch (dump_method) {
case IPL_METHOD_CCW_CIO:
dump_smp_stop_all();
smp_send_stop();
devid.devno = dump_block_ccw->ipl_info.ccw.devno;
devid.ssid = 0;
reipl_ccw_dev(&devid);
break;
case IPL_METHOD_CCW_VM:
dump_smp_stop_all();
smp_send_stop();
sprintf(buf, "STORE STATUS");
__cpcmd(buf, NULL, 0, NULL);
sprintf(buf, "IPL %X", dump_block_ccw->ipl_info.ccw.devno);
@@ -1059,9 +1042,6 @@ void s390_reset_system(void)
{
struct _lowcore *lc;
/* Disable all interrupts/machine checks */
__load_psw_mask(PSW_KERNEL_BITS & ~PSW_MASK_MCHECK);
/* Stack for interrupt/machine check handler */
lc = (struct _lowcore *)(unsigned long) store_prefix();
lc->panic_stack = S390_lowcore.panic_stack;