s390/zdtm: Add s390x_reg_check test case

This test can be used to verify FP and VX registers on s390:

- Verify that "criu restore" sets the correct register sets
  from "criu dump":
  $ zdtmp.py run -t zdtm/static/s390x_regs_check

- Verify that dumpee continues running with correct registers after
  parasite injection:
  $ zdtm.py run --norst -t zdtm/static/s390x_regs_check
  $ zdtm.py run --norst --pre 2 -t zdtm/static/s390x_regs_check
  $ zdtm.py run --check-only -t zdtm/static/s390x_regs_check
Reviewed-by: Alice Frosi <alice@linux.vnet.ibm.com>
Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com>
Reviewed-by: Cyrill Gorcunov <gorcunov@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@virtuozzo.com>

test/zdtm/static/Makefile

@@ -182,6 +182,10 @@ ifneq ($(COMPAT_TEST),y)
 endif
 endif
 
+ifeq ($(SRCARCH),s390)
+        TST_NOFILE += s390x_regs_check
+endif
+
 TST_FILE	=				\
 		maps06				\
 		write_read00			\
@@ -462,6 +466,8 @@ pty-console:		CFLAGS += -D ZDTM_DEV_CONSOLE
 
 shm-unaligned:		CFLAGS += -DZDTM_SHM_UNALIGNED
 
+s390x_regs_check:	LDFLAGS += -pthread
+
 $(LIB):	force
 	$(Q) $(MAKE) -C $(LIBDIR)
 

test/zdtm/static/s390x_regs_check.desc

+{'arch': 's390x'}