[S390] vmur: fix diag14 exceptions with addresses > 2GB.

There are several s390 diagnose calls, which must be executed below the
2GB memory boundary. In order to enforce this, those diagnoses must be
compiled into the kernel. Currently diag 14 can be called within the
vmur kernel module from addresses above 2GB. This leads to specification
exceptions. This patch moves diag10, diag14 and diag210 into the new
diag.c file.

Signed-off-by: Michael Holzheu <holzheu@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>

1 files changed, 4 insertions, 28 deletions

diff --git a/drivers/s390/char/vmur.c b/drivers/s390/char/vmur.c
index 04b19bdc09da..2d96c958df64 100644
--- a/drivers/s390/char/vmur.c
+++ b/drivers/s390/char/vmur.c
@@ -14,6 +14,7 @@
 #include <asm/cio.h>
 #include <asm/ccwdev.h>
 #include <asm/debug.h>
+#include <asm/diag.h>
 
 #include "vmur.h"
 
@@ -379,31 +380,6 @@ static ssize_t ur_write(struct file *file, const char __user *udata,
         return do_write(urf->urd, udata, count, urf->dev_reclen, ppos);
 }
 
-static int do_diag_14(unsigned long rx, unsigned long ry1,
-                      unsigned long subcode)
-{
-        register unsigned long _ry1 asm("2") = ry1;
-        register unsigned long _ry2 asm("3") = subcode;
-        int rc = 0;
-
-        asm volatile(
-#ifdef CONFIG_64BIT
-                "   sam31\n"
-                "   diag    %2,2,0x14\n"
-                "   sam64\n"
-#else
-                "   diag    %2,2,0x14\n"
-#endif
-                "   ipm     %0\n"
-                "   srl     %0,28\n"
-                : "=d" (rc), "+d" (_ry2)
-                : "d" (rx), "d" (_ry1)
-                : "cc");
-
-        TRACE("diag 14: subcode=0x%lx, cc=%i\n", subcode, rc);
-        return rc;
-}
-
 /*
  * diagnose code 0x14 subcode 0x0028 - position spool file to designated
  *                                     record
@@ -415,7 +391,7 @@ static int diag_position_to_record(int devno, int record)
 {
         int cc;
 
-        cc = do_diag_14(record, devno, 0x28);
+        cc = diag14(record, devno, 0x28);
         switch (cc) {
         case 0:
                 return 0;
@@ -440,7 +416,7 @@ static int diag_read_file(int devno, char *buf)
 {
         int cc;
 
-        cc = do_diag_14((unsigned long) buf, devno, 0x00);
+        cc = diag14((unsigned long) buf, devno, 0x00);
         switch (cc) {
         case 0:
                 return 0;
@@ -533,7 +509,7 @@ static int diag_read_next_file_info(struct file_control_block *buf, int spid)
 {
         int cc;
 
-        cc = do_diag_14((unsigned long) buf, spid, 0xfff);
+        cc = diag14((unsigned long) buf, spid, 0xfff);
         switch (cc) {
         case 0:
                 return 0;