[PATCH v6 i-g-t 4/6] tests: Add core_sysfs

[Peter Senna Tschudin <peter.senna@linux.intel.com>]

core_sysfs is GPU-agnostic test designed to work with any GPU, not
limited to i915 and Xe. The test scans the sysfs directory associated
with the GPU, reads all files, and discards the content.

Cc: kamil.konieczny@linux.intel.com
Cc: katarzyna.piecielska@intel.com
Cc: zbigniew.kempczynski@intel.com
Cc: michal.wajdeczko@intel.com
Cc: karthik.b.s@intel.com
Cc: ewelina.musial@intel.com
Reviewed-by: Kamil Konieczny <kamil.konieczny@linux.intel.com>
Signed-off-by: Peter Senna Tschudin <peter.senna@linux.intel.com>
---
v6:
 - unchanged from v5
v5:
 - use igt_dir_process_files_simple()
v4:
 - unchanged from v3
v3:
 - removed "sysfs" from the name of subtest (Thanks Michal Wajdeczko)
v2:
 - changed style of comparison to NULL

 tests/core_sysfs.c                         | 48 ++++++++++++++++++++++
 tests/intel-ci/i915.fast-feedback.testlist |  1 +
 tests/intel-ci/xe-fast-feedback.testlist   |  1 +
 tests/meson.build                          |  1 +
 4 files changed, 51 insertions(+)
 create mode 100644 tests/core_sysfs.c

diff --git a/tests/core_sysfs.c b/tests/core_sysfs.c
new file mode 100644
index 000000000..c43008981
--- /dev/null
+++ b/tests/core_sysfs.c
@@ -0,0 +1,48 @@
+// SPDX-License-Identifier: MIT
+/*
+ * Copyright © 2025 Intel Corporation
+ */
+
+#include "igt.h"
+#include "igt_dir.h"
+#include "igt_sysfs.h"
+
+/**
+ * TEST: sysfs test
+ * Description: Read entries from sysfs path.
+ * Category: Core
+ * Mega feature: General Core features
+ * Sub-category: uapi
+ * Functionality: sysfs
+ * Feature: core
+ * Test category: uapi
+ *
+ * SUBTEST: read-all-entries
+ * Description: Read all entries from sysfs path
+ *
+ */
+
+IGT_TEST_DESCRIPTION("Read entries from sysfs paths.");
+
+igt_main
+{
+	int fd = -1;
+	int sysfs = -1;
+
+	igt_fixture {
+		fd = drm_open_driver_master(DRIVER_ANY);
+		sysfs = igt_sysfs_open(fd);
+		igt_require(sysfs >= 0);
+
+		kmstest_set_vt_graphics_mode();
+	}
+
+	igt_describe("Read all entries from sysfs path.");
+	igt_subtest("read-all-entries")
+		igt_dir_process_files_simple(sysfs);
+
+	igt_fixture {
+		close(sysfs);
+		drm_close_driver(fd);
+	}
+}
diff --git a/tests/intel-ci/i915.fast-feedback.testlist b/tests/intel-ci/i915.fast-feedback.testlist
index 3ec1b95cf..5d4d101ef 100644
--- a/tests/intel-ci/i915.fast-feedback.testlist
+++ b/tests/intel-ci/i915.fast-feedback.testlist
@@ -4,6 +4,7 @@ igt@i915_module_load@load
 # Keep alphabetically sorted by default
 igt@core_auth@basic-auth
 igt@core_debugfs@read-all-entries
+igt@core_sysfs@read-all-entries
 igt@fbdev@eof
 igt@fbdev@info
 igt@fbdev@nullptr
diff --git a/tests/intel-ci/xe-fast-feedback.testlist b/tests/intel-ci/xe-fast-feedback.testlist
index ac3177ae9..a5f799f6b 100644
--- a/tests/intel-ci/xe-fast-feedback.testlist
+++ b/tests/intel-ci/xe-fast-feedback.testlist
@@ -8,6 +8,7 @@ igt@fbdev@read
 igt@fbdev@write
 
 igt@core_debugfs@read-all-entries
+igt@core_sysfs@read-all-entries
 igt@intel_sysfs_debugfs@xe-base
 igt@intel_sysfs_debugfs@xe-debugfs-read-all-entries
 igt@intel_sysfs_debugfs@xe-forcewake
diff --git a/tests/meson.build b/tests/meson.build
index 568e7db00..532bc9071 100644
--- a/tests/meson.build
+++ b/tests/meson.build
@@ -7,6 +7,7 @@ test_progs = [
 	'core_hotunplug',
 	'core_setmaster',
 	'core_setmaster_vs_auth',
+	'core_sysfs',
 	'dmabuf',
 	'dmabuf_sync_file',
 	'device_reset',
-- 
2.43.0