Re: [PATCH v3 06/10] selftests: kvm: s390: Add VM run test case

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On 7/30/24 9:24 AM, Christoph Schlameuss wrote:
Add test case running code interacting with registers within a
ucontrol VM.

* Add uc_gprs test case

The test uses the same VM setup using the fixture and debug macros
introduced in earlier patches in this series.

Signed-off-by: Christoph Schlameuss <schlameuss@xxxxxxxxxxxxx>
---
  .../selftests/kvm/s390x/ucontrol_test.c       | 126 ++++++++++++++++++
  1 file changed, 126 insertions(+)

diff --git a/tools/testing/selftests/kvm/s390x/ucontrol_test.c b/tools/testing/selftests/kvm/s390x/ucontrol_test.c
index 029233374465..817b1e08559c 100644
--- a/tools/testing/selftests/kvm/s390x/ucontrol_test.c
+++ b/tools/testing/selftests/kvm/s390x/ucontrol_test.c
@@ -41,6 +41,23 @@ void require_ucontrol_admin(void)
  	TEST_REQUIRE(kvm_has_cap(KVM_CAP_S390_UCONTROL));
  }
[...]
+/* verify SIEIC exit
+ * * reset stop requests
+ * * fail on codes not expected in the test cases
+ */
+static bool uc_handle_sieic(FIXTURE_DATA(uc_kvm) * self)
+{
+	struct kvm_s390_sie_block *sie_block = self->sie_block;
+	struct kvm_run *run = self->run;
+
+	/* check SIE interception code */
+	pr_info("sieic: 0x%2x 0x%4x 0x%4x\n",

I don't think there should be a space before the 4:
sieic: 0x 4 0x8300 0x440000

We can automatically add in the missing 0
0x%02x

+		run->s390_sieic.icptcode,
+		run->s390_sieic.ipa,
+		run->s390_sieic.ipb);
+	switch (run->s390_sieic.icptcode) {
+	case ICPT_STOP:
+		/* stopped via sie V P --> ignore */
+		/* reset stop request */
+		sie_block->cpuflags = sie_block->cpuflags & ~CPUSTAT_STOP_INT;
+		pr_info("sie V P - cleared %.4x\n", sie_block->cpuflags);
+		break;

With the added code that removes the P bit this shouldn't be called anymore, no?

+	case ICPT_INST:
+		/* end execution in caller on intercepted instruction */
+		return false;
+	default:
+		TEST_FAIL("UNEXPECTED SIEIC CODE %d", run->s390_sieic.icptcode);
+	}
+	return true;
+}





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