From patchwork Sat Feb 17 01:05:56 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Stephen Boyd X-Patchwork-Id: 13561180 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 0B840C48260 for ; Sat, 17 Feb 2024 01:06:48 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=adloAhyvMGqIZplWS+Ersr+24Jr3z2rlgMqM3l1PO+4=; b=ZmsG5sv2CChBZp rKY7CuRrcj5KE7phNhFT6WniY2gicjYjSv1+TCQoKntEODK6eI9KnUhZNkU2JiA3lyQ5YQqd+1eLY Cy1fdqqUaymE49/TO6wNC8mahU7Gx2mkBy7inK+hh1BiGJbGiUa5LXhQq/Us5CUXeIcf0eMt8SnAy 3ja7fDeQAumm9vMBoGAJRCfpn29LPnVmqTbkKBqro3HojNDwWr/UNwKyfGlcZYaC8xcT0JD6Xbo1/ XZBRBswY4hoQxRckCs1rKi7w9lTVwGAj0SWTKFOyNEFGFw04rmusmyzYoQEMIbiObbHu8/jnJpoxT DUZf6JKkO3RBtGrku+Fw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.97.1 #2 (Red Hat Linux)) id 1rb9A4-00000004M9F-3MEX; Sat, 17 Feb 2024 01:06:36 +0000 Received: from sin.source.kernel.org ([145.40.73.55]) by bombadil.infradead.org with esmtps (Exim 4.97.1 #2 (Red Hat Linux)) id 1rb99a-00000004Lk9-0Eja; Sat, 17 Feb 2024 01:06:08 +0000 Received: from smtp.kernel.org (transwarp.subspace.kernel.org [100.75.92.58]) by sin.source.kernel.org (Postfix) with ESMTP id 0669BCE2DA2; Sat, 17 Feb 2024 01:06:04 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id BDE8DC433A6; Sat, 17 Feb 2024 01:06:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1708131963; bh=J3WMalAjgz0rnHbmeT8QD4FpP4dD0hu4Yj+NzkEppQE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=EAOa4fi46Q5W6L0e8l/qgg64ROvD783Ms6lXCLYZpxVg35KK7iz4ZOPqJG55vnPGq 3UeRnJKaA3I3cKg6k8nOeUWz9METclLEOdD2v/vwKpzE0krhoMDcnzcf32fLp60VJM TsuqeU8cRg0jhmjmGbtWhR66ChQwQ7qIhwKmEc6mNkXVzW0mVxPXvpIFCOvDJP4Ug0 5GQ1D1ccdPvjJlEHgSowFvSe0mQgCZKbefm6SWMC5Ip+4IplYU/9M+WdLtT1NdVNNg COT3rSgSj0bQbQPCU6igti603mJcNcGUWeyv11PFrXku2BBWdb9jKivpvYiB0ZyZVU Kkj8/nueN6ZGw== 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 v4 7/7] of: Add KUnit test to confirm DTB is loaded Date: Fri, 16 Feb 2024 17:05:56 -0800 Message-ID: <20240217010557.2381548-8-sboyd@kernel.org> X-Mailer: git-send-email 2.44.0.rc0.258.g7320e95886-goog In-Reply-To: <20240217010557.2381548-1-sboyd@kernel.org> References: <20240217010557.2381548-1-sboyd@kernel.org> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20240216_170606_594038_DB9E8394 X-CRM114-Status: GOOD ( 18.31 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org 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. We skip the test when CONFIG_OF_EARLY_FLATREE=n because in that case we know architecture code hasn't called unflatten_(and_copy_)?device_tree() which would populate some sort of root node. Cc: Rob Herring Cc: Frank Rowand Reviewed-by: David Gow Cc: Brendan Higgins Signed-off-by: Stephen Boyd --- drivers/of/.kunitconfig | 3 +++ drivers/of/Kconfig | 9 +++++++ drivers/of/Makefile | 2 ++ drivers/of/of_test.c | 57 +++++++++++++++++++++++++++++++++++++++++ 4 files changed, 71 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 d738fbad9c36..dd726c7056bf 100644 --- a/drivers/of/Kconfig +++ b/drivers/of/Kconfig @@ -36,6 +36,15 @@ config OF_UNITTEST If unsure, say N here. This option is not safe to enable. +config OF_KUNIT_TEST + tristate "Devicetree KUnit 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..a9301d293f01 --- /dev/null +++ b/drivers/of/of_test.c @@ -0,0 +1,57 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * KUnit tests for OF APIs + */ +#include +#include + +#include + +/* + * Test that the root node "/" can be found by path. + */ +static void of_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. Remove this test once of_root is removed from global access. + */ +static void of_dtb_root_node_populates_of_root(struct kunit *test) +{ + KUNIT_EXPECT_NOT_ERR_OR_NULL(test, of_root); +} + +static struct kunit_case of_dtb_test_cases[] = { + KUNIT_CASE(of_dtb_root_node_found_by_path), + KUNIT_CASE(of_dtb_root_node_populates_of_root), + {} +}; + +static int of_dtb_test_init(struct kunit *test) +{ + if (!IS_ENABLED(CONFIG_OF_EARLY_FLATTREE)) + kunit_skip(test, "requires CONFIG_OF_EARLY_FLATTREE"); + + return 0; +} + +/* + * Test suite to confirm a DTB is loaded. + */ +static struct kunit_suite of_dtb_suite = { + .name = "of_dtb", + .test_cases = of_dtb_test_cases, + .init = of_dtb_test_init, +}; + +kunit_test_suites( + &of_dtb_suite, +); +MODULE_LICENSE("GPL");