[kvm-unit-tests PATCH v2 7/9] s390x: css: msch, enable test

Pierre Morel
2019-11-28T12:46:19Z

A second step when testing the channel subsystem is to prepare a channel
for use.

This tests the success of the MSCH instruction by enabling a channel.

Signed-off-by: Pierre Morel <pmorel@linux.ibm.com>
---
s390x/css.c | 27 +++++++++++++++++++++++++++
1 file changed, 27 insertions(+)

diff --git a/s390x/css.c b/s390x/css.c
index 8186f55..e42dc2f 100644
--- a/s390x/css.c
+++ b/s390x/css.c
@@ -62,11 +62,38 @@ static void test_enumerate(void)
return;
}

+static void set_schib(void)
+{
+ struct pmcw *p = &schib.pmcw;
+
+ p->intparm = 0xdeadbeef;
+ p->flags |= PMCW_ENABLE;
+}
+
+static void test_enable(void)
+{
+ int ret;
+
+ if (!test_device_sid) {
+ report_skip("No device");
+ return;
+ }
+ set_schib();
+ dump_schib(&schib);
+
+ ret = msch(test_device_sid, &schib);
+ if (ret)
+ report("msch cc=%d", 0, ret);
+ else
+ report("Tested", 1);
+}
+
static struct {
const char *name;
void (*func)(void);
} tests[] = {
{ "enumerate (stsch)", test_enumerate },
+ { "enable (msch)", test_enable },
{ NULL, NULL }
};

--
2.17.0