[kvm-unit-tests,v3,3/8] s390x: uv-host: Test uv immediate parameter

Commit Message

Janosch Frank Oct. 17, 2022, 9:39 a.m. UTC

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 <[e-mail]>
Reviewed-by: Steffen Eiden <[e-mail]>
---
 s390x/uv-host.c | 23 +++++++++++++++++++++++
 1 file changed, 23 insertions(+)

Patch

diff --git a/s390x/uv-host.c b/s390x/uv-host.c
index 24dcd6dc..e401fa5d 100644
--- a/s390x/uv-host.c
+++ b/s390x/uv-host.c
@@ -90,6 +90,28 @@  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 = {};
@@ -585,6 +607,7 @@  int main(void)
 		goto done;
 	}
 
+	test_i3();
 	test_priv();
 	test_invalid();
 	test_uv_uninitialized();