Merge tag 'linux-kselftest-kunit-5.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest

Pull KUnit updates from Shuah Khan:
 "Several fixes, cleanups, and enhancements to tests and framework:

   - introduce _NULL and _NOT_NULL macros to pointer error checks

   - rework kunit_resource allocation policy to fix memory leaks when
     caller doesn't specify free() function to be used when allocating
     memory using kunit_add_resource() and kunit_alloc_resource() funcs.

   - add ability to specify suite-level init and exit functions"

* tag 'linux-kselftest-kunit-5.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest: (41 commits)
  kunit: tool: Use qemu-system-i386 for i386 runs
  kunit: fix executor OOM error handling logic on non-UML
  kunit: tool: update riscv QEMU config with new serial dependency
  kcsan: test: use new suite_{init,exit} support
  kunit: tool: Add list of all valid test configs on UML
  kunit: take `kunit_assert` as `const`
  kunit: tool: misc cleanups
  kunit: tool: minor cosmetic cleanups in kunit_parser.py
  kunit: tool: make parser stop overwriting status of suites w/ no_tests
  kunit: tool: remove dead parse_crash_in_log() logic
  kunit: tool: print clearer error message when there's no TAP output
  kunit: tool: stop using a shell to run kernel under QEMU
  kunit: tool: update test counts summary line format
  kunit: bail out of test filtering logic quicker if OOM
  lib/Kconfig.debug: change KUnit tests to default to KUNIT_ALL_TESTS
  kunit: Rework kunit_resource allocation policy
  kunit: fix debugfs code to use enum kunit_status, not bool
  kfence: test: use new suite_{init/exit} support, add .kunitconfig
  kunit: add ability to specify suite-level init and exit functions
  kunit: rename print_subtest_{start,end} for clarity (s/subtest/suite)
  ...

Documentation/dev-tools/kunit/api/index.rst

@@ -6,6 +6,7 @@ API Reference
 .. toctree::
 
 	test
+	resource
 
 This section documents the KUnit kernel testing API. It is divided into the
 following sections:
@@ -13,3 +14,7 @@ following sections:
 Documentation/dev-tools/kunit/api/test.rst
 
  - documents all of the standard testing API
+
+Documentation/dev-tools/kunit/api/resource.rst
+
+ - documents the KUnit resource API

Documentation/dev-tools/kunit/api/resource.rst

@@ -0,0 +1,13 @@
+.. SPDX-License-Identifier: GPL-2.0
+
+============
+Resource API
+============
+
+This file documents the KUnit resource API.
+
+Most users won't need to use this API directly, power users can use it to store
+state on a per-test basis, register custom cleanup actions, and more.
+
+.. kernel-doc:: include/kunit/resource.h
+   :internal:

Documentation/dev-tools/kunit/running_tips.rst

@@ -114,6 +114,7 @@ Instead of enabling ``CONFIG_GCOV_KERNEL=y``, we can set these options:
 
 	CONFIG_DEBUG_KERNEL=y
 	CONFIG_DEBUG_INFO=y
+	CONFIG_DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT=y
 	CONFIG_GCOV=y
 
 
@@ -122,7 +123,7 @@ Putting it together into a copy-pastable sequence of commands:
 .. code-block:: bash
 
 	# Append coverage options to the current config
-	$ echo -e "CONFIG_DEBUG_KERNEL=y\nCONFIG_DEBUG_INFO=y\nCONFIG_GCOV=y" >> .kunit/.kunitconfig
+	$ echo -e "CONFIG_DEBUG_KERNEL=y\nCONFIG_DEBUG_INFO=y\nCONFIG_DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT=y\nCONFIG_GCOV=y" >> .kunit/.kunitconfig
 	$ ./tools/testing/kunit/kunit.py run
 	# Extract the coverage information from the build dir (.kunit/)
 	$ lcov -t "my_kunit_tests" -o coverage.info -c -d .kunit/

Documentation/dev-tools/kunit/usage.rst

@@ -125,8 +125,8 @@ We need many test cases covering all the unit's behaviors. It is common to have
 many similar tests. In order to reduce duplication in these closely related
 tests, most unit testing frameworks (including KUnit) provide the concept of a
 *test suite*. A test suite is a collection of test cases for a unit of code
-with a setup function that gets invoked before every test case and then a tear
-down function that gets invoked after every test case completes. For example:
+with optional setup and teardown functions that run before/after the whole
+suite and/or every test case. For example:
 
 .. code-block:: c
 
@@ -141,16 +141,19 @@ down function that gets invoked after every test case completes. For example:
 		.name = "example",
 		.init = example_test_init,
 		.exit = example_test_exit,
+		.suite_init = example_suite_init,
+		.suite_exit = example_suite_exit,
 		.test_cases = example_test_cases,
 	};
 	kunit_test_suite(example_test_suite);
 
-In the above example, the test suite ``example_test_suite`` would run the test
-cases ``example_test_foo``, ``example_test_bar``, and ``example_test_baz``. Each
-would have ``example_test_init`` called immediately before it and
-``example_test_exit`` called immediately after it.
-``kunit_test_suite(example_test_suite)`` registers the test suite with the
-KUnit test framework.
+In the above example, the test suite ``example_test_suite`` would first run
+``example_suite_init``, then run the test cases ``example_test_foo``,
+``example_test_bar``, and ``example_test_baz``. Each would have
+``example_test_init`` called immediately before it and ``example_test_exit``
+called immediately after it. Finally, ``example_suite_exit`` would be called
+after everything else. ``kunit_test_suite(example_test_suite)`` registers the
+test suite with the KUnit test framework.
 
 .. note::
    A test case will only run if it is associated with a test suite.