From patchwork Fri Jan 12 20:07:49 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stephen Boyd X-Patchwork-Id: 762575 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 470E117730; Fri, 12 Jan 2024 20:07:55 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel.org header.i=@kernel.org header.b="W9/SlA7d" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 51766C43394; Fri, 12 Jan 2024 20:07:55 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1705090075; bh=ua+X20080YRjcHe0C1o6t3ehjcRZtGl3WAk/t15eQ/k=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=W9/SlA7dwlMSfXI4eTDVjMoPuCuC9FE1VqpmUJNPyPwQcZ8vlOb3P4KZF4WInPPrS D8k7Eg93W+UcWyPzE34O9t7/0Rr/Jc5XD6DXkEd93rA65eBuxCnEml4DGbpVStHG91 KfzR94Rm5w+TjxilnrPr76MZfQCzXDw0Dnl4o8kaSyQYVsyfxyMT8lW7R/dRKq3C0K 4eCSbmy0jRzfvTWgthjDeZ4Q1Knu8TPgS+6KWnQYxLighp/oo63e1pZ3JTdIiz0hea iA41au/DcqhZ+iLg00zV0JqHCZ0cLYgx2ywejUbFVJO4av9lBILwhzoqmlQq8qLy9V uRIv5ur7Xhdug== From: Stephen Boyd To: Rob Herring Cc: linux-kernel@vger.kernel.org, patches@lists.linux.dev, linux-um@lists.infradead.org, linux-arm-kernel@lists.infradead.org, kunit-dev@googlegroups.com, linux-kselftest@vger.kernel.org, devicetree@vger.kernel.org, Frank Rowand , David Gow , Brendan Higgins Subject: [PATCH 6/6] of: Add KUnit test to confirm DTB is loaded Date: Fri, 12 Jan 2024 12:07:49 -0800 Message-ID: <20240112200750.4062441-7-sboyd@kernel.org> X-Mailer: git-send-email 2.43.0.275.g3460e3d667-goog In-Reply-To: <20240112200750.4062441-1-sboyd@kernel.org> References: <20240112200750.4062441-1-sboyd@kernel.org> Precedence: bulk X-Mailing-List: linux-kselftest@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Add a KUnit test that confirms a DTB has been loaded, i.e. there is a root node, and that the of_have_populated_dt() API works properly. Cc: Rob Herring Cc: Frank Rowand Cc: David Gow Cc: Brendan Higgins Signed-off-by: Stephen Boyd Reviewed-by: David Gow --- drivers/of/.kunitconfig | 3 ++ drivers/of/Kconfig | 9 ++++ drivers/of/Makefile | 2 + drivers/of/of_test.c | 98 +++++++++++++++++++++++++++++++++++++++++ 4 files changed, 112 insertions(+) create mode 100644 drivers/of/.kunitconfig create mode 100644 drivers/of/of_test.c diff --git a/drivers/of/.kunitconfig b/drivers/of/.kunitconfig new file mode 100644 index 000000000000..5a8fee11978c --- /dev/null +++ b/drivers/of/.kunitconfig @@ -0,0 +1,3 @@ +CONFIG_KUNIT=y +CONFIG_OF=y +CONFIG_OF_KUNIT_TEST=y diff --git a/drivers/of/Kconfig b/drivers/of/Kconfig index 9628e48baa15..a527ba8451d9 100644 --- a/drivers/of/Kconfig +++ b/drivers/of/Kconfig @@ -37,6 +37,15 @@ config OF_UNITTEST If unsure, say N here. This option is not safe to enable. +config OF_KUNIT_TEST + tristate "Devicetree KUnit DTB Test" if !KUNIT_ALL_TESTS + depends on KUNIT + default KUNIT_ALL_TESTS + help + This option builds KUnit unit tests for device tree infrastructure. + + If unsure, say N here, but this option is safe to enable. + config OF_ALL_DTBS bool "Build all Device Tree Blobs" depends on COMPILE_TEST diff --git a/drivers/of/Makefile b/drivers/of/Makefile index df305348d1cb..251d33532148 100644 --- a/drivers/of/Makefile +++ b/drivers/of/Makefile @@ -19,4 +19,6 @@ obj-y += kexec.o endif endif +obj-$(CONFIG_OF_KUNIT_TEST) += of_test.o + obj-$(CONFIG_OF_UNITTEST) += unittest-data/ diff --git a/drivers/of/of_test.c b/drivers/of/of_test.c new file mode 100644 index 000000000000..7609ad3081b9 --- /dev/null +++ b/drivers/of/of_test.c @@ -0,0 +1,98 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * KUnit tests for OF APIs + */ +#include +#include + +#include + +/* + * Test that the root node "/" exists. + */ +static void dtb_root_node_found_by_path(struct kunit *test) +{ + struct device_node *np; + + np = of_find_node_by_path("/"); + KUNIT_EXPECT_NOT_ERR_OR_NULL(test, np); + of_node_put(np); +} + +/* + * Test that the of_root global variable is always populated when DT + * code is enabled. + */ +static void dtb_root_node_populates_of_root(struct kunit *test) +{ + KUNIT_EXPECT_NOT_ERR_OR_NULL(test, of_root); +} + +static struct kunit_case dtb_test_cases[] = { + KUNIT_CASE(dtb_root_node_found_by_path), + KUNIT_CASE(dtb_root_node_populates_of_root), + {} +}; + +/* + * Test suite to confirm a live DTB is loaded. + */ +static struct kunit_suite dtb_suite = { + .name = "dtb", + .test_cases = dtb_test_cases, +}; + +/* + * Test that calling of_have_populated_dt() returns false when + * the OF_EMPTY_ROOT flag isn't set. + */ +static void of_have_populated_dt_false_when_flag_set(struct kunit *test) +{ + bool was_set; + + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, of_root); + + was_set = of_node_test_and_set_flag(of_root, OF_EMPTY_ROOT); + KUNIT_EXPECT_FALSE(test, of_have_populated_dt()); + + if (!was_set) + of_node_clear_flag(of_root, OF_EMPTY_ROOT); +} + +/* + * Test that calling of_have_populated_dt() returns false when + * the OF_EMPTY_ROOT flag isn't set. + */ +static void of_have_populated_dt_true_when_flag_clear(struct kunit *test) +{ + bool was_set; + + KUNIT_ASSERT_NOT_ERR_OR_NULL(test, of_root); + + was_set = of_node_check_flag(of_root, OF_EMPTY_ROOT); + of_node_set_flag(of_root, OF_EMPTY_ROOT); + KUNIT_EXPECT_FALSE(test, of_have_populated_dt()); + + if (was_set) + of_node_set_flag(of_root, OF_EMPTY_ROOT); +} + +static struct kunit_case of_have_populated_dt_test_cases[] = { + KUNIT_CASE(of_have_populated_dt_false_when_flag_set), + KUNIT_CASE(of_have_populated_dt_true_when_flag_clear), + {} +}; + +/* + * Test suite to confirm behavior of of_have_populated_dt(). + */ +static struct kunit_suite of_have_populated_dt_suite = { + .name = "of_have_populated_dt", + .test_cases = of_have_populated_dt_test_cases, +}; + +kunit_test_suites( + &dtb_suite, + &of_have_populated_dt_suite, +); +MODULE_LICENSE("GPL");