linux-kernel - [RFC v4 12/17] kunit: defconfig: add defconfigs for building KUnit tests

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Message-Id: <20190214213729.21702-13-brendanhiggins@google.com>
Date:   Thu, 14 Feb 2019 13:37:24 -0800
From:   Brendan Higgins <brendanhiggins@...gle.com>
To:     keescook@...gle.com, mcgrof@...nel.org, shuah@...nel.org,
        robh@...nel.org, kieran.bingham@...asonboard.com,
        frowand.list@...il.com
Cc:     gregkh@...uxfoundation.org, joel@....id.au, mpe@...erman.id.au,
        joe@...ches.com, brakmo@...com, rostedt@...dmis.org,
        Tim.Bird@...y.com, khilman@...libre.com, julia.lawall@...6.fr,
        linux-kselftest@...r.kernel.org, kunit-dev@...glegroups.com,
        linux-kernel@...r.kernel.org, jdike@...toit.com, richard@....at,
        linux-um@...ts.infradead.org, daniel@...ll.ch,
        dri-devel@...ts.freedesktop.org, dan.j.williams@...el.com,
        linux-nvdimm@...ts.01.org, knut.omang@...cle.com,
        devicetree@...r.kernel.org, pmladek@...e.com,
        Alexander.Levin@...rosoft.com, amir73il@...il.com,
        dan.carpenter@...cle.com, wfg@...ux.intel.com,
        Brendan Higgins <brendanhiggins@...gle.com>
Subject: [RFC v4 12/17] kunit: defconfig: add defconfigs for building KUnit tests

Add defconfig for UML and a fragment that can be used to configure other
architectures for building KUnit tests. Add option to kunit_tool to use
a defconfig to create the kunitconfig.

Signed-off-by: Brendan Higgins <brendanhiggins@...gle.com>
---
Changes Since Last Version
 - This patch is new adding default configs to build KUnit.
 - NOTE: there is still some discussion to be had here about whether we
   should go with a defconfig, a config fragment, or both.
---
 arch/um/configs/kunit_defconfig              |  8 ++++++++
 tools/testing/kunit/configs/all_tests.config |  8 ++++++++
 tools/testing/kunit/kunit.py                 | 17 +++++++++++++++--
 tools/testing/kunit/kunit_kernel.py          |  3 ++-
 4 files changed, 33 insertions(+), 3 deletions(-)
 create mode 100644 arch/um/configs/kunit_defconfig
 create mode 100644 tools/testing/kunit/configs/all_tests.config

diff --git a/arch/um/configs/kunit_defconfig b/arch/um/configs/kunit_defconfig
new file mode 100644
index 0000000000000..bfe49689038f1
--- /dev/null
+++ b/arch/um/configs/kunit_defconfig
@@ -0,0 +1,8 @@
+CONFIG_OF=y
+CONFIG_OF_UNITTEST=y
+CONFIG_OF_OVERLAY=y
+CONFIG_I2C=y
+CONFIG_I2C_MUX=y
+CONFIG_KUNIT=y
+CONFIG_KUNIT_TEST=y
+CONFIG_KUNIT_EXAMPLE_TEST=y
diff --git a/tools/testing/kunit/configs/all_tests.config b/tools/testing/kunit/configs/all_tests.config
new file mode 100644
index 0000000000000..bfe49689038f1
--- /dev/null
+++ b/tools/testing/kunit/configs/all_tests.config
@@ -0,0 +1,8 @@
+CONFIG_OF=y
+CONFIG_OF_UNITTEST=y
+CONFIG_OF_OVERLAY=y
+CONFIG_I2C=y
+CONFIG_I2C_MUX=y
+CONFIG_KUNIT=y
+CONFIG_KUNIT_TEST=y
+CONFIG_KUNIT_EXAMPLE_TEST=y
diff --git a/tools/testing/kunit/kunit.py b/tools/testing/kunit/kunit.py
index 7413ec7351a20..63e9fb3b60200 100755
--- a/tools/testing/kunit/kunit.py
+++ b/tools/testing/kunit/kunit.py
@@ -11,6 +11,7 @@ import argparse
 import sys
 import os
 import time
+import shutil
 
 import kunit_config
 import kunit_kernel
@@ -36,14 +37,26 @@ parser.add_argument('--build_dir',
 		    'directory.',
 		    type=str, default=None, metavar='build_dir')
 
-cli_args = parser.parse_args()
+parser.add_argument('--defconfig',
+		    help='Uses a default kunitconfig.',
+		    action='store_true')
 
-linux = kunit_kernel.LinuxSourceTree()
+def create_default_kunitconfig():
+	if not os.path.exists(kunit_kernel.KUNITCONFIG_PATH):
+		shutil.copyfile('arch/um/configs/kunit_defconfig',
+				kunit_kernel.KUNITCONFIG_PATH)
+
+cli_args = parser.parse_args()
 
 build_dir = None
 if cli_args.build_dir:
 	build_dir = cli_args.build_dir
 
+if cli_args.defconfig:
+	create_default_kunitconfig()
+
+linux = kunit_kernel.LinuxSourceTree()
+
 config_start = time.time()
 success = linux.build_reconfig(build_dir)
 config_end = time.time()
diff --git a/tools/testing/kunit/kunit_kernel.py b/tools/testing/kunit/kunit_kernel.py
index 07c0abf2f47df..bf38768353313 100644
--- a/tools/testing/kunit/kunit_kernel.py
+++ b/tools/testing/kunit/kunit_kernel.py
@@ -14,6 +14,7 @@ import os
 import kunit_config
 
 KCONFIG_PATH = '.config'
+KUNITCONFIG_PATH = 'kunitconfig'
 
 class ConfigError(Exception):
 	"""Represents an error trying to configure the Linux kernel."""
@@ -81,7 +82,7 @@ class LinuxSourceTree(object):
 
 	def __init__(self):
 		self._kconfig = kunit_config.Kconfig()
-		self._kconfig.read_from_file('kunitconfig')
+		self._kconfig.read_from_file(KUNITCONFIG_PATH)
 		self._ops = LinuxSourceTreeOperations()
 
 	def clean(self):
-- 
2.21.0.rc0.258.g878e2cd30e-goog