Re: [kvm-unit-tests PATCH v2 3/8] s390x: uv-host: Test uv immediate parameter

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On 7/6/22 08:40, Janosch Frank wrote:
Let's check if we get a specification PGM exception if we set a
non-zero i3 when doing a UV call.

Signed-off-by: Janosch Frank <frankja@xxxxxxxxxxxxx>
Reviewed-by: Steffen Eiden <seiden@xxxxxxxxxxxxx>
---
  s390x/uv-host.c | 23 +++++++++++++++++++++++
  1 file changed, 23 insertions(+)

diff --git a/s390x/uv-host.c b/s390x/uv-host.c
index 5aeacb42..0762e690 100644
--- a/s390x/uv-host.c
+++ b/s390x/uv-host.c
@@ -82,6 +82,28 @@ static struct cmd_list cmds[] = {
  	{ NULL, 0, 0 },
  };
+static void test_i3(void)
+{
+	struct uv_cb_header uvcb = {
+		.cmd = UVC_CMD_INIT_UV,
+		.len = sizeof(struct uv_cb_init),
+	};
+	unsigned long r1 = 0;
+	int cc;
+
+	report_prefix_push("i3");
+	expect_pgm_int();
+	asm volatile(
+		"0:	.insn rrf,0xB9A40000,%[r1],%[r2],4,2\n"
+		"		ipm	%[cc]\n"
+		"		srl	%[cc],28\n"
+		: [cc] "=d" (cc)
+		: [r1] "a" (r1), [r2] "a" (&uvcb)
+		: "memory", "cc");
+	check_pgm_int_code(PGM_INT_CODE_SPECIFICATION);
+	report_prefix_pop();
+}
+
  static void test_priv(void)
  {
  	struct uv_cb_header uvcb = {};
@@ -577,6 +599,7 @@ int main(void)
  		goto done;
  	}
+ test_i3();
  	test_priv();
  	test_invalid();
  	test_uv_uninitialized();



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