[S390] cleanup lowcore access from external interrupts

Read external interrupts parameters from the lowcore in the first
level interrupt handler in entry[64].S.

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

1 files changed, 4 insertions, 1 deletions

diff --git a/arch/s390/kernel/entry64.S b/arch/s390/kernel/entry64.S
index 2d205e4e7bb6..e4038ea4dc57 100644
--- a/arch/s390/kernel/entry64.S
+++ b/arch/s390/kernel/entry64.S
@@ -727,8 +727,11 @@ ext_int_handler:
 ext_no_vtime:
         HANDLE_SIE_INTERCEPT
         TRACE_IRQS_OFF
+        lghi    %r1,4096
         la      %r2,SP_PTREGS(%r15)     # address of register-save area
-        llgh    %r3,__LC_EXT_INT_CODE   # get interruption code
+        llgf    %r3,__LC_CPU_ADDRESS    # get cpu address + interruption code
+        llgf    %r4,__LC_EXT_PARAMS     # get external parameter
+        lg      %r5,__LC_EXT_PARAMS2-4096(%r1)  # get 64 bit external parameter
         brasl   %r14,do_extint
         j       io_return