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| author | David S. Miller <davem@davemloft.net> | 2011-08-07 23:20:26 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2011-08-07 23:20:26 -0700 |
| commit | 19fd61785a580c60cba900c5171bfadb57dd5056 (patch) | |
| tree | 1e491fb014be0dc03f4b6755bb94e73afd38c455 /arch/s390/kernel/entry64.S | |
| parent | 57569d0e12eaf31717e295960cd2a26f626c8e5b (diff) | |
| parent | 8028837d71ba9904b17281b40f94b93e947fbe38 (diff) | |
| download | linux-rt-19fd61785a580c60cba900c5171bfadb57dd5056.tar.gz | |
Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/davem/net
Diffstat (limited to 'arch/s390/kernel/entry64.S')
| -rw-r--r-- | arch/s390/kernel/entry64.S | 20 |
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: restart_go: #endif +# +# PSW restart interrupt handler +# +ENTRY(psw_restart_int_handler) + stg %r15,__LC_SAVE_AREA_64(%r0) # save r15 + larl %r15,restart_stack # load restart stack + lg %r15,0(%r15) + aghi %r15,-SP_SIZE # make room for pt_regs + stmg %r0,%r14,SP_R0(%r15) # store gprs %r0-%r14 to stack + mvc SP_R15(8,%r15),__LC_SAVE_AREA_64(%r0)# store saved %r15 to stack + mvc SP_PSW(16,%r15),__LC_RST_OLD_PSW(%r0)# store restart old psw + xc __SF_BACKCHAIN(8,%r15),__SF_BACKCHAIN(%r15) # set backchain to 0 + brasl %r14,do_restart + + larl %r14,restart_psw_crash # load disabled wait PSW if + lpswe 0(%r14) # do_restart returns + .align 8 +restart_psw_crash: + .quad 0x0002000080000000,0x0000000000000000 + restart_psw_crash + .section .kprobes.text, "ax" #ifdef CONFIG_CHECK_STACK |