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[S390] Export vmcoreinfo note

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This patch defines for s390 an ABI defined pointer to the vmcoreinfo note at
a well known address. With this patch tools are able to find this information
in dumps created by stand-alone or hypervisor dump tools.

Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
This commit is contained in:
Michael Holzheu
2011-10-30 15:16:42 +01:00
committed by Martin Schwidefsky
parent fa8ff292bb
commit d38593f938
2 changed files with 16 additions and 4 deletions
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10
arch/s390/kernel/setup.c
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@ -558,6 +558,15 @@ static void __init setup_restart_psw(void)
copy_to_absolute_zero(&S390_lowcore.restart_psw, &psw, sizeof(psw));
}
static void __init setup_vmcoreinfo(void)
{
#ifdef CONFIG_KEXEC
unsigned long ptr = paddr_vmcoreinfo_note();
copy_to_absolute_zero(&S390_lowcore.vmcore_info, &ptr, sizeof(ptr));
#endif
}
#ifdef CONFIG_CRASH_DUMP
/*
@ -1022,6 +1031,7 @@ setup_arch(char **cmdline_p)
reserve_crashkernel();
setup_memory();
setup_resources();
setup_vmcoreinfo();
setup_restart_psw();
setup_lowcore();