[PATCH i-g-t 2/2] tests/intel/xe_configfs: Test engines_allowed

[Lucas De Marchi]

Add tests for the parsing of engines_allowed configfs. This doesn't try
to bind the driver and ensure only those engines are available. That's
because the engine uapi instance doesn't necessarily match what is used
for configfs configuration. Maybe we will need an engine map in debugfs
for covering that.

Signed-off-by: Lucas De Marchi <lucas.demarchi at intel.com>
---
 tests/intel/xe_configfs.c | 36 ++++++++++++++++++++++++++++++++++++
 1 file changed, 36 insertions(+)

diff --git a/tests/intel/xe_configfs.c b/tests/intel/xe_configfs.c
index 074cd04d9..c559b4974 100644
--- a/tests/intel/xe_configfs.c
+++ b/tests/intel/xe_configfs.c
@@ -10,6 +10,7 @@
 #include "igt_fs.h"
 #include "igt_kmod.h"
 #include "igt_sysfs.h"
+#include "xe/xe_query.h"
 
 /**
  * TEST: Check configfs userspace API
@@ -54,6 +55,29 @@ static void test_survivability_mode(int configfs_device_fd)
 	close(fd);
 }
 
+/**
+ * SUBTEST: engines-allowed-invalid
+ * Description: Validate engines_allowed attribute for invalid values
+ */
+static void test_engines_allowed_invalid(int configfs_device_fd)
+{
+	static const char *values[] = {
+		"xcs0",
+		"abcsdcs0",
+		"rcs0,abcsdcs0",
+		"rcs9",
+		"rcs10",
+		"rcs0asdf",
+	};
+
+	for (size_t i = 0; i < ARRAY_SIZE(values); i++) {
+		const char *v = values[i];
+
+		igt_debug("Writing '%s' to engines_allowed\n", v);
+		igt_assert(!igt_sysfs_set(configfs_device_fd, "engines_allowed", v));
+	}
+}
+
 static int create_device_configfs_group(int configfs_fd, int fd)
 {
 	int configfs_device_fd;
@@ -88,6 +112,18 @@ igt_main
 		test_survivability_mode(configfs_device_fd);
 	}
 
+	igt_describe("Validate engines_allowed with invalid options");
+	igt_subtest("engines-allowed-invalid") {
+		igt_install_exit_handler(restore);
+		test_engines_allowed_invalid(configfs_device_fd);
+	}
+
+	igt_describe("Validate engines_allowed");
+	igt_subtest("engines-allowed") {
+		igt_install_exit_handler(restore);
+		test_engines_allowed(configfs_device_fd);
+	}
+
 	igt_fixture {
 		igt_fs_remove_dir(configfs_fd, bus_addr);
 		close(configfs_device_fd);

-- 
2.49.0