[kvm-unit-tests PATCH v3 08/16] s390x: css: ssch check for cpa zero

[Pierre Morel <pmorel@xxxxxxxxxxxxx>]

We expect a CSS program check if the CPA of the ORB is null
and access to the IRB to check it.

Signed-off-by: Pierre Morel <pmorel@xxxxxxxxxxxxx>
---
 lib/s390x/css.h     |  1 +
 lib/s390x/css_lib.c |  4 ++--
 s390x/css.c         | 13 +++++++++++++
 3 files changed, 16 insertions(+), 2 deletions(-)

diff --git a/lib/s390x/css.h b/lib/s390x/css.h
index a5a8427..d824e34 100644
--- a/lib/s390x/css.h
+++ b/lib/s390x/css.h
@@ -139,6 +139,7 @@ struct irb {
 	uint32_t ecw[8];
 	uint32_t emw[8];
 } __attribute__ ((aligned(4)));
+extern struct irb irb;
 
 #define CCW_CMD_SENSE_ID	0xe4
 #define CSS_SENSEID_COMMON_LEN	8
diff --git a/lib/s390x/css_lib.c b/lib/s390x/css_lib.c
index 65159aa..12ef874 100644
--- a/lib/s390x/css_lib.c
+++ b/lib/s390x/css_lib.c
@@ -21,6 +21,8 @@
 
 struct schib schib;
 struct chsc_scsc *chsc_scsc;
+struct irb irb;
+
 
 static const char * const chsc_rsp_description[] = {
 	"CHSC unknown error",
@@ -411,8 +413,6 @@ bool css_disable_mb(int schid)
 	return retry_count > 0;
 }
 
-static struct irb irb;
-
 void css_irq_io(void)
 {
 	int ret = 0;
diff --git a/s390x/css.c b/s390x/css.c
index da21ccc..d248cac 100644
--- a/s390x/css.c
+++ b/s390x/css.c
@@ -91,8 +91,21 @@ static void ssch_privilege(void)
 	check_pgm_int_code(PGM_INT_CODE_PRIVILEGED_OPERATION);
 }
 
+static void ssch_orb_cpa_zero(void)
+{
+	uint32_t cpa = orb->cpa;
+
+	orb->cpa = 0;
+	ssch(test_device_sid, orb);
+	tsch(test_device_sid, &irb);
+	report(check_io_errors(test_device_sid, 0, SCSW_SCHS_PRG_CHK), "expecting Program check");
+
+	orb->cpa = cpa;
+}
+
 static struct tests ssh_tests[] = {
 	{ "privilege", ssch_privilege },
+	{ "orb cpa zero", ssch_orb_cpa_zero },
 	{ NULL, NULL }
 };
 
-- 
2.17.1