aboutsummaryrefslogtreecommitdiffstats
path: root/arch/s390/kernel/entry64.S
diff options
context:
space:
mode:
Diffstat (limited to 'arch/s390/kernel/entry64.S')
-rw-r--r--arch/s390/kernel/entry64.S20
1 files changed, 20 insertions, 0 deletions
diff --git a/arch/s390/kernel/entry64.S b/arch/s390/kernel/entry64.S
index 7a0fd426ca92..5f729d627cef 100644
--- a/arch/s390/kernel/entry64.S
+++ b/arch/s390/kernel/entry64.S
@@ -865,6 +865,26 @@ restart_crash:
865restart_go: 865restart_go:
866#endif 866#endif
867 867
868#
869# PSW restart interrupt handler
870#
871ENTRY(psw_restart_int_handler)
872 stg %r15,__LC_SAVE_AREA_64(%r0) # save r15
873 larl %r15,restart_stack # load restart stack
874 lg %r15,0(%r15)
875 aghi %r15,-SP_SIZE # make room for pt_regs
876 stmg %r0,%r14,SP_R0(%r15) # store gprs %r0-%r14 to stack
877 mvc SP_R15(8,%r15),__LC_SAVE_AREA_64(%r0)# store saved %r15 to stack
878 mvc SP_PSW(16,%r15),__LC_RST_OLD_PSW(%r0)# store restart old psw
879 xc __SF_BACKCHAIN(8,%r15),__SF_BACKCHAIN(%r15) # set backchain to 0
880 brasl %r14,do_restart
881
882 larl %r14,restart_psw_crash # load disabled wait PSW if
883 lpswe 0(%r14) # do_restart returns
884 .align 8
885restart_psw_crash:
886 .quad 0x0002000080000000,0x0000000000000000 + restart_psw_crash
887
868 .section .kprobes.text, "ax" 888 .section .kprobes.text, "ax"
869 889
870#ifdef CONFIG_CHECK_STACK 890#ifdef CONFIG_CHECK_STACK