1 files changed, 22 insertions, 1 deletions

diff --git a/arch/s390/kernel/ipl.c b/arch/s390/kernel/ipl.c
index f731185bf2bd..a83cf1fdd8f5 100644
--- a/arch/s390/kernel/ipl.c
+++ b/arch/s390/kernel/ipl.c
@@ -47,7 +47,7 @@ enum ipl_type {
  * Must be in data section since the bss section
  * is not cleared when these are accessed.
  */
-u16 ipl_devno __attribute__((__section__(".data"))) = 0;
+static u16 ipl_devno __attribute__((__section__(".data"))) = 0;
 u32 ipl_flags __attribute__((__section__(".data"))) = 0;
 
 static char *ipl_type_str(enum ipl_type type)
@@ -1038,6 +1038,27 @@ static int __init s390_ipl_init(void)
 
 __initcall(s390_ipl_init);
 
+void __init ipl_save_parameters(void)
+{
+        struct cio_iplinfo iplinfo;
+        unsigned int *ipl_ptr;
+        void *src, *dst;
+
+        if (cio_get_iplinfo(&iplinfo))
+                return;
+
+        ipl_devno = iplinfo.devno;
+        ipl_flags |= IPL_DEVNO_VALID;
+        if (!iplinfo.is_qdio)
+                return;
+        ipl_flags |= IPL_PARMBLOCK_VALID;
+        ipl_ptr = (unsigned int *)__LC_IPL_PARMBLOCK_PTR;
+        src = (void *)(unsigned long)*ipl_ptr;
+        dst = (void *)IPL_PARMBLOCK_ORIGIN;
+        memmove(dst, src, PAGE_SIZE);
+        *ipl_ptr = IPL_PARMBLOCK_ORIGIN;
+}
+
 static LIST_HEAD(rcall);
 static DEFINE_MUTEX(rcall_mutex);