[S390] ipl/dump on panic.

It is now possible to specify a ccw/fcp dump device which is used to
automatically create a system dump in case of a kernel panic. The dump
device can be configured under /sys/firmware/dump.
In addition it is now possible to specify a ccw/fcp device which is used
for the next reboot of Linux. The reipl device can be configured under
/sys/firmware/reipl.

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

1 files changed, 25 insertions, 9 deletions

diff --git a/arch/s390/kernel/reipl64.S b/arch/s390/kernel/reipl64.S
index 4d090d60f3ef..95bd1e234f63 100644
--- a/arch/s390/kernel/reipl64.S
+++ b/arch/s390/kernel/reipl64.S
@@ -8,13 +8,30 @@
  */
 
 #include <asm/lowcore.h>
-                .globl  do_reipl
-do_reipl:       basr    %r13,0
-.Lpg0:          lpswe   .Lnewpsw-.Lpg0(%r13)
+                .globl  do_reipl_asm
+do_reipl_asm:   basr    %r13,0
+
+                # do store status of all registers
+
+.Lpg0:          stg     %r1,.Lregsave-.Lpg0(%r13)
+                lghi    %r1,0x1000
+                stmg    %r0,%r15,__LC_GPREGS_SAVE_AREA-0x1000(%r1)
+                lg      %r0,.Lregsave-.Lpg0(%r13)
+                stg     %r0,__LC_GPREGS_SAVE_AREA-0x1000+8(%r1)
+                stctg   %c0,%c15,__LC_CREGS_SAVE_AREA-0x1000(%r1)
+                stam    %a0,%a15,__LC_AREGS_SAVE_AREA-0x1000(%r1)
+                stpx    __LC_PREFIX_SAVE_AREA-0x1000(%r1)
+                stfpc   __LC_FP_CREG_SAVE_AREA-0x1000(%r1)
+                stckc   .Lclkcmp-.Lpg0(%r13)
+                mvc     __LC_CLOCK_COMP_SAVE_AREA-0x1000(8,%r1),.Lclkcmp-.Lpg0(%r13)
+                stpt    __LC_CPU_TIMER_SAVE_AREA-0x1000(%r1)
+                stg     %r13, __LC_PSW_SAVE_AREA-0x1000+8(%r1)
+
+                lpswe   .Lnewpsw-.Lpg0(%r13)
 .Lpg1:          lctlg   %c6,%c6,.Lall-.Lpg0(%r13)
-                stctg   %c0,%c0,.Lctlsave-.Lpg0(%r13)
-                ni      .Lctlsave+4-.Lpg0(%r13),0xef
-                lctlg   %c0,%c0,.Lctlsave-.Lpg0(%r13)
+                stctg   %c0,%c0,.Lregsave-.Lpg0(%r13)
+                ni      .Lregsave+4-.Lpg0(%r13),0xef
+                lctlg   %c0,%c0,.Lregsave-.Lpg0(%r13)
                 lgr     %r1,%r2
                 mvc     __LC_PGM_NEW_PSW(16),.Lpcnew-.Lpg0(%r13)
                 stsch   .Lschib-.Lpg0(%r13)                                    
@@ -50,8 +67,9 @@ do_reipl:	basr	%r13,0
                 st     %r14,.Ldispsw+12-.Lpg0(%r13)
                 lpswe   .Ldispsw-.Lpg0(%r13)
                 .align  8
+.Lclkcmp:       .quad   0x0000000000000000
 .Lall:          .quad   0x00000000ff000000
-.Lctlsave:      .quad   0x0000000000000000
+.Lregsave:      .quad   0x0000000000000000
 .Lnull:         .long   0x0000000000000000
                 .align  16
 /*
@@ -92,5 +110,3 @@ do_reipl:	basr	%r13,0
                 .long   0x00000000,0x00000000
                 .long   0x00000000,0x00000000
         
-
-