[kvm-unit-tests PATCH v4 7/8] s390x: Add tests for TSCH

Nico Boehr
2022-02-24T15:44:09Z

TSCH has two special cases which need to be tested:

- unaligned address. We test for misalignment by 1 and 2 bytes.
- channel not operational
- bit 47 in SID not set

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 | 36 ++++++++++++++++++++++++++++++++++++
1 file changed, 36 insertions(+)

diff --git a/s390x/css.c b/s390x/css.c
index dd84e670ce99..a333e55a290d 100644
--- a/s390x/css.c
+++ b/s390x/css.c
@@ -581,6 +581,41 @@ static void test_pmcw_bit5(void)
report_prefix_pop();
}

+static void test_tsch(void)
+{
+ const int align_to = 4;
+ struct irb irb;
+ int cc;
+
+ 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();
+ tsch(test_device_sid, (struct irb *)(alignment_test_page + i));
+ check_pgm_int_code(PGM_INT_CODE_SPECIFICATION);
+
+ report_prefix_pop();
+ }
+ report_prefix_pop();
+
+ report_prefix_push("Invalid subchannel number");
+ cc = tsch(0x0001ffff, &irb);
+ report(cc == 3, "Channel not operational");
+ report_prefix_pop();
+
+ report_prefix_push("Bit 47 in SID is zero");
+ expect_pgm_int();
+ tsch(0x0000ffff, &irb);
+ check_pgm_int_code(PGM_INT_CODE_OPERAND);
+ report_prefix_pop();
+}
+
static struct {
const char *name;
void (*func)(void);
@@ -598,6 +633,7 @@ static struct {
{ "ssch", test_ssch },
{ "stsch", test_stsch },
{ "pmcw bit 5 ignored", test_pmcw_bit5 },
+ { "tsch", test_tsch },
{ NULL, NULL }
};

--
2.31.1