[kvm-unit-tests PATCH v4 5/8] s390x: Add more tests for SSCH

Nico Boehr
2022-02-24T15:43:57Z

We already have some coverage of SSCH due to its use in
start_ccw1_chain() in css_lib, but two more cases deserve our
attention:

- unaligned operand address. We check for misalignment by 1 and 2 bytes.
- an invalid ORB structure.

Signed-off-by: Nico Boehr <nrb@linux.ibm.com>
Reviewed-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
Reviewed-by: Pierre Morel <pmorel@linux.ibm.com>
---
s390x/css.c | 33 +++++++++++++++++++++++++++++++++
1 file changed, 33 insertions(+)

diff --git a/s390x/css.c b/s390x/css.c
index fcc264eecd4b..7fe5283c41d0 100644
--- a/s390x/css.c
+++ b/s390x/css.c
@@ -469,6 +469,38 @@ static void test_stcrw(void)
report_prefix_pop();
}

+static void test_ssch(void)
+{
+ const int align_to = 4;
+ struct orb orb;
+
+ if (!test_device_sid) {
+ report_skip("No device");
+ return;
+ }
+
+ report_prefix_push("Unaligned");
+ for (int i = 1; i < align_to; i *= 2) {
+ report_prefix_pushf("%d", i);
+
+ expect_pgm_int();
+ ssch(test_device_sid, (struct orb *)(alignment_test_page + i));
+ check_pgm_int_code(PGM_INT_CODE_SPECIFICATION);
+
+ report_prefix_pop();
+ }
+ report_prefix_pop();
+
+ report_prefix_push("Invalid ORB");
+
+ memset(&orb, 0xff, sizeof(orb));
+ expect_pgm_int();
+ ssch(test_device_sid, &orb);
+ check_pgm_int_code(PGM_INT_CODE_OPERAND);
+
+ report_prefix_pop();
+}
+
static struct {
const char *name;
void (*func)(void);
@@ -483,6 +515,7 @@ static struct {
{ "measurement block format1", test_schm_fmt1 },
{ "msch", test_msch },
{ "stcrw", test_stcrw },
+ { "ssch", test_ssch },
{ NULL, NULL }
};

--
2.31.1