Merge master.kernel.org:/pub/scm/linux/kernel/git/tmlind/linux-omap-upstream into...

[powerpc.git] / arch / s390 / kernel / entry.S

diff --git a/arch/s390/kernel/entry.S b/arch/s390/kernel/entry.S
index 5b5799a..0c712b7 100644 (file)
--- a/arch/s390/kernel/entry.S
+++ b/arch/s390/kernel/entry.S
@@ -505,6 +505,8 @@ pgm_no_vtime2:
        mvc     __THREAD_per+__PER_address(4,%r1),__LC_PER_ADDRESS
        mvc     __THREAD_per+__PER_access_id(1,%r1),__LC_PER_ACCESS_ID
        oi      __TI_flags+3(%r9),_TIF_SINGLE_STEP # set TIF_SINGLE_STEP
+       tm      SP_PSW+1(%r15),0x01     # kernel per event ?
+       bz      BASED(kernel_per)
        l       %r3,__LC_PGM_ILC         # load program interruption code
        la      %r8,0x7f
        nr      %r8,%r3                  # clear per-event-bit and ilc
@@ -536,6 +538,16 @@ pgm_no_vtime3:
        stosm   __SF_EMPTY(%r15),0x03   # reenable interrupts
        b       BASED(sysc_do_svc)
 
+#
+# per was called from kernel, must be kprobes
+#
+kernel_per:
+       mvi     SP_TRAP+1(%r15),0x28    # set trap indication to pgm check
+       la      %r2,SP_PTREGS(%r15)     # address of register-save area
+       l       %r1,BASED(.Lhandle_per) # load adr. of per handler
+       la      %r14,BASED(sysc_leave)  # load adr. of system return
+       br      %r1                     # branch to do_single_step
+
 /*
  * IO interrupt handler routine
  */