diff mbox series

[kvm-unit-tests,GIT,PULL,16/27] s390x: smp: stop already stopped CPU

Message ID 20220401111620.366435-17-imbrenda@linux.ibm.com (mailing list archive)
State New, archived
Headers show
Series s390x: smp, vm lib updates; I/O and smp tests | expand

Commit Message

Claudio Imbrenda April 1, 2022, 11:16 a.m. UTC 
From: Nico Boehr <nrb@linux.ibm.com>

As per the PoP, the SIGP STOP order is only effective when the CPU is in
the operating state. Hence, we should have a test which tries to stop an
already stopped CPU.

Even though the SIGP order might be processed asynchronously, we assert
the CPU stays stopped.

Signed-off-by: Nico Boehr <nrb@linux.ibm.com>
Reviewed-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
Reviewed-by: Janosch Frank <frankja@linux.ibm.com>
Signed-off-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
---
 s390x/smp.c | 5 +++++
 1 file changed, 5 insertions(+)
diff mbox series

Patch

diff --git a/s390x/smp.c b/s390x/smp.c
index cfced18a..fcced84f 100644
--- a/s390x/smp.c
+++ b/s390x/smp.c
@@ -140,6 +140,11 @@  static void test_stop(void)
 	report(!rc, "return code");
 	report(smp_cpu_stopped(1), "cpu stopped");
 
+	report_prefix_push("stop stopped CPU");
+	report(!smp_cpu_stop(1), "STOP succeeds");
+	report(smp_cpu_stopped(1), "CPU is stopped");
+	report_prefix_pop();
+
 	report_prefix_pop();
 }