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[PATCH] s390: kexec fixes and improvements.

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Disable pseudo page fault handling before starting the new kernel and try
to use diag308 to reset the machine.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Heiko Carstens
2005-08-01 21:11:33 -07:00
committed by Linus Torvalds
parent 4374ae10e5
commit 5d3f229fcd
5 changed files with 109 additions and 5 deletions
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15
arch/s390/kernel/traps.c
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@@ -29,6 +29,7 @@
#include <linux/delay.h>
#include <linux/module.h>
#include <linux/kallsyms.h>
#include <linux/reboot.h>
#include <asm/system.h>
#include <asm/uaccess.h>
@@ -675,6 +676,19 @@ asmlinkage void kernel_stack_overflow(struct pt_regs * regs)
panic("Corrupt kernel stack, can't continue.");
}
#ifndef CONFIG_ARCH_S390X
static int
pagex_reboot_event(struct notifier_block *this, unsigned long event, void *ptr)
{
if (MACHINE_IS_VM)
cpcmd("SET PAGEX OFF", NULL, 0, NULL);
return NOTIFY_DONE;
}
static struct notifier_block pagex_reboot_notifier = {
.notifier_call = &pagex_reboot_event,
};
#endif
/* init is done in lowcore.S and head.S */
@@ -735,6 +749,7 @@ void __init trap_init(void)
&ext_int_pfault);
#endif
#ifndef CONFIG_ARCH_S390X
register_reboot_notifier(&pagex_reboot_notifier);
cpcmd("SET PAGEX ON", NULL, 0, NULL);
#endif
}