[PATCH kvm-unit-tests 1/9] s390x: fix TEST BLOCK tests

[David Hildenbrand <david@redhat.com>]

While new compilers like
	s390x-linux-gnu-gcc (GCC) 7.2.1 20170915 (Red Hat Cross 7.2.1-1)
Complain, that R1 is missing, old compilers like
	gcc (GCC) 4.8.5 20150623 (Red Hat 4.8.5-16)
will complain that R1 is not valid.

According to the architecture, R1 is valid but ignored. No idea why this
was changed (in a way that programs no longer compile).

Anyhow, let's just specify the instruction explicitly.

Signed-off-by: David Hildenbrand <david@redhat.com>
---
 s390x/intercept.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/s390x/intercept.c b/s390x/intercept.c
index 59e5fca..99dde0d 100644
--- a/s390x/intercept.c
+++ b/s390x/intercept.c
@@ -139,7 +139,7 @@ static void test_testblock(void)
 
 	asm volatile (
 		" lghi	%%r0,0\n"
-		" tb	%1\n"
+		" .insn	rre,0xb22c0000,0,%1\n"
 		" ipm	%0\n"
 		" srl	%0,28\n"
 		: "=d" (cc)
@@ -150,12 +150,12 @@ static void test_testblock(void)
 
 	expect_pgm_int();
 	low_prot_enable();
-	asm volatile (" tb %0 " : : "r"(4096));
+	asm volatile (" .insn	rre,0xb22c0000,0,%0\n" : : "r"(4096));
 	low_prot_disable();
 	check_pgm_int_code(PGM_INT_CODE_PROTECTION);
 
 	expect_pgm_int();
-	asm volatile (" tb %0 " : : "r"(-4096));
+	asm volatile (" .insn	rre,0xb22c0000,0,%0\n" : : "r"(-4096));
 	check_pgm_int_code(PGM_INT_CODE_ADDRESSING);
 }
 
-- 
2.14.3