diff mbox series

[kvm-unit-tests,GIT,PULL,19/27] s390x: smp: add tests for CONDITIONAL EMERGENCY

Message ID 20220401111620.366435-20-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>

Add a test for the conditional emergency signal.

We cover the following cases:
- invalid CPU address. Should lead to the order being rejected.
- the order is accepted and an emergency signal is delivered. We make sure
  this is the case by disabling the CPU's PSW for IO interruptions.

Note we intentionally don't cover the case where the signal isn't
delivered. As per the PoP, implementations are allowed to make the signal
an unconditional one when the condition determination is precluded.

This test is unsupported under PV.

Signed-off-by: Nico Boehr <nrb@linux.ibm.com>
Reviewed-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
Signed-off-by: Claudio Imbrenda <imbrenda@linux.ibm.com>
---
 s390x/smp.c | 43 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 43 insertions(+)
diff mbox series

Patch

diff --git a/s390x/smp.c b/s390x/smp.c
index c204d0b9..1dffbd7b 100644
--- a/s390x/smp.c
+++ b/s390x/smp.c
@@ -16,6 +16,7 @@ 
 #include <asm/sigp.h>
 
 #include <smp.h>
+#include <uv.h>
 #include <alloc_page.h>
 
 static int testflag = 0;
@@ -362,6 +363,47 @@  static void test_emcall(void)
 	report_prefix_pop();
 }
 
+static void test_cond_emcall(void)
+{
+	uint32_t status = 0;
+	struct psw psw;
+	int cc;
+	psw.mask = extract_psw_mask() & ~PSW_MASK_IO;
+	psw.addr = (unsigned long)emcall;
+
+	report_prefix_push("conditional emergency call");
+
+	if (uv_os_is_guest()) {
+		report_skip("unsupported under PV");
+		goto out;
+	}
+
+	report_prefix_push("invalid CPU address");
+
+	cc = sigp(INVALID_CPU_ADDRESS, SIGP_COND_EMERGENCY_SIGNAL, 0, NULL);
+	report(cc == 3, "CC = 3");
+
+	report_prefix_pop();
+
+	report_prefix_push("success");
+	set_flag(0);
+
+	smp_cpu_start(1, psw);
+	wait_for_flag();
+	set_flag(0);
+	cc = smp_sigp(1, SIGP_COND_EMERGENCY_SIGNAL, 0, &status);
+	report(!cc, "CC = 0");
+
+	wait_for_flag();
+	smp_cpu_stop(1);
+
+	report_prefix_pop();
+
+out:
+	report_prefix_pop();
+
+}
+
 static void test_sense_running(void)
 {
 	report_prefix_push("sense_running");
@@ -485,6 +527,7 @@  int main(void)
 	test_set_prefix();
 	test_ecall();
 	test_emcall();
+	test_cond_emcall();
 	test_sense_running();
 	test_reset();
 	test_reset_initial();