[S390] Export vmcoreinfo note
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>
diff --git a/arch/s390/kernel/setup.c b/arch/s390/kernel/setup.c
index b5a30412..63c81de 100644
--- a/arch/s390/kernel/setup.c
+++ b/arch/s390/kernel/setup.c
@@ -558,6 +558,15 @@
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 @@
reserve_crashkernel();
setup_memory();
setup_resources();
+ setup_vmcoreinfo();
setup_restart_psw();
setup_lowcore();