[PATCH v2 04/10] s390x: smp: Test local interrupts after cpu reset

Janosch Frank
2020-04-23T09:10:30Z

Local interrupts (external and emergency call) should be cleared after
any cpu reset.

Signed-off-by: Janosch Frank <frankja@linux.ibm.com>
Reviewed-by: Cornelia Huck <cohuck@redhat.com>
---
s390x/smp.c | 22 ++++++++++++++++++++++
1 file changed, 22 insertions(+)

diff --git a/s390x/smp.c b/s390x/smp.c
index 8a6cd1d..a8e3dd7 100644
--- a/s390x/smp.c
+++ b/s390x/smp.c
@@ -243,6 +243,20 @@ static void test_reset_initial(void)
report_prefix_pop();
}

+static void test_local_ints(void)
+{
+ unsigned long mask;
+
+ expect_ext_int();
+ /* Open masks for ecall and emcall */
+ ctl_set_bit(0, 13);
+ ctl_set_bit(0, 14);
+ mask = extract_psw_mask();
+ mask |= PSW_MASK_EXT;
+ load_psw_mask(mask);
+ set_flag(1);
+}
+
static void test_reset(void)
{
struct psw psw;
@@ -251,10 +265,18 @@ static void test_reset(void)
psw.addr = (unsigned long)test_func;

report_prefix_push("cpu reset");
+ sigp(1, SIGP_EMERGENCY_SIGNAL, 0, NULL);
+ sigp(1, SIGP_EXTERNAL_CALL, 0, NULL);
smp_cpu_start(1, psw);

sigp_retry(1, SIGP_CPU_RESET, 0, NULL);
report(smp_cpu_stopped(1), "cpu stopped");
+
+ set_flag(0);
+ psw.addr = (unsigned long)test_local_ints;
+ smp_cpu_start(1, psw);
+ wait_for_flag();
+ report(true, "local interrupts cleared");
report_prefix_pop();
}

--
2.25.1