From patchwork Tue Oct 1 15:43:23 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: =?utf-8?b?TsOtY29sYXMgRi4gUi4gQS4gUHJhZG8=?= X-Patchwork-Id: 832133 Received: from bali.collaboradmins.com (bali.collaboradmins.com [148.251.105.195]) (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 0F61C1C8FD5; Tue, 1 Oct 2024 15:44:12 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=148.251.105.195 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1727797454; cv=none; b=acRKYjZC4Fty4lNBV+SpXjtXULJj1GwkedN/0VKnZpZlmjdxe80HvcrEx+ooitZmAJJlkAUaScFj9rOlkkDv0g3aqicIJeT9Rk0NUtEOZCoY9c+6qczyoWQEcrVNuvDpBquV7dz2+TyJOMnvvoo5WGmqcxmWeZcwIS3CkVvGBt0= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1727797454; c=relaxed/simple; bh=uh9EhIRmTQfFlAsmyL3OVDGo/q51it5ueX+NO09uEbc=; h=From:Date:Subject:MIME-Version:Content-Type:Message-Id:To:Cc; b=smLZKm1oDd3SaLMz0UeQ+xTBgxX/Mr6j2I7ntA3PvbtQ52c7F21MGA/ylZAP/6QTzhBebbEJYBQv3FH7zoEFylQE/wSFrDCsLhAKhjfp+ysNFaC9FD+UsJBjSr/7fapVfP+NnTq61S9h867s2l46Dv3wCnNEPl7WDYw3GaW5mXo= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=collabora.com; spf=pass smtp.mailfrom=collabora.com; dkim=pass (2048-bit key) header.d=collabora.com header.i=@collabora.com header.b=T4xJxuhW; arc=none smtp.client-ip=148.251.105.195 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=collabora.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=collabora.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=collabora.com header.i=@collabora.com header.b="T4xJxuhW" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=collabora.com; s=mail; t=1727797451; bh=uh9EhIRmTQfFlAsmyL3OVDGo/q51it5ueX+NO09uEbc=; h=From:Date:Subject:To:Cc:From; b=T4xJxuhWZDmr4RQw/qGKq8YoSdDeaRZSKIJ7crVtLTibbNqgnVmCCQXMIL7s7cxN7 SM2GZadJykWIgbjaosM4l6L6HrcNbx1FK7xzd4OPpbafP22gYF9vAnwSN/yemHtom/ nN68JbmHn/mMLS5gtOcMfGW9e+msWXsRjVMfs7mXZbUfDjGcxBRYUYlipeKXgd1XfQ MdsldGQz1qxgly7N0Z7k+d366fX7iP1ApsQqX7j5DgfhezKeWIjIO1OUTPe2mzT7Vv 5MLVFYLpPMJmYZRP9FaDkEDY5iEfI30XgsRHlSJDMthv5hBToonOa9SBU3Emx1tXJr /EJWSIr5UnPFg== Received: from [192.168.1.33] (pool-100-2-116-133.nycmny.fios.verizon.net [100.2.116.133]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) (Authenticated sender: nfraprado) by bali.collaboradmins.com (Postfix) with ESMTPSA id 62CEC17E0FE4; Tue, 1 Oct 2024 17:44:10 +0200 (CEST) From: =?utf-8?b?TsOtY29sYXMgRi4gUi4gQS4gUHJhZG8=?= Date: Tue, 01 Oct 2024 11:43:23 -0400 Subject: [PATCH] docs: dev-tools: Add documentation for the device focused kselftests Precedence: bulk X-Mailing-List: linux-kselftest@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <20241001-kselftest-device-docs-v1-1-be28b70dd855@collabora.com> X-B4-Tracking: v=1; b=H4sIAJoY/GYC/x2M0QpAQBAAf0X7bOtWCL8iD9wtNjq6ldTl310ep 2YmgnIQVuiyCIFvUTl8AsozsOvoF0ZxiaEwRUnGEG7K+3yxXuiSbhndYRVr24wlEZl2qiC1Z+B Znv/bD+/7ARsAJ4ZnAAAA To: Shuah Khan , Jonathan Corbet Cc: kernel@collabora.com, linux-kselftest@vger.kernel.org, workflows@vger.kernel.org, linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, kernelci@lists.linux.dev, =?utf-8?b?TsOtY29s?= =?utf-8?b?YXMgRi4gUi4gQS4gUHJhZG8=?= X-Mailer: b4 0.14.1 Add documentation for the kselftests focused on testing devices and point to it from the kselftest documentation. There are multiple tests in this category so the aim of this page is to make it clear when to run each test. Signed-off-by: Nícolas F. R. A. Prado --- This patch depends on patch "kselftest: devices: Add test to detect missing devices" [1], since this patch documents that test. [1] https://lore.kernel.org/all/20240928-kselftest-dev-exist-v2-1-fab07de6b80b@collabora.com --- Documentation/dev-tools/kselftest.rst | 9 ++++++ Documentation/dev-tools/testing-devices.rst | 47 +++++++++++++++++++++++++++++ 2 files changed, 56 insertions(+) --- base-commit: cea5425829f77e476b03702426f6b3701299b925 change-id: 20241001-kselftest-device-docs-6c8a411109b5 Best regards, diff --git a/Documentation/dev-tools/kselftest.rst b/Documentation/dev-tools/kselftest.rst index f3766e326d1e..fdb1df86783a 100644 --- a/Documentation/dev-tools/kselftest.rst +++ b/Documentation/dev-tools/kselftest.rst @@ -31,6 +31,15 @@ kselftest runs as a userspace process. Tests that can be written/run in userspace may wish to use the `Test Harness`_. Tests that need to be run in kernel space may wish to use a `Test Module`_. +Documentation on the tests +========================== + +For documentation on the kselftests themselves, see: + +.. toctree:: + + testing-devices + Running the selftests (hotplug tests are run in limited mode) ============================================================= diff --git a/Documentation/dev-tools/testing-devices.rst b/Documentation/dev-tools/testing-devices.rst new file mode 100644 index 000000000000..ab26adb99051 --- /dev/null +++ b/Documentation/dev-tools/testing-devices.rst @@ -0,0 +1,47 @@ +.. SPDX-License-Identifier: GPL-2.0 +.. Copyright (c) 2024 Collabora Ltd + +============================= +Device testing with kselftest +============================= + + +There are a few different kselftests available for testing devices generically, +with some overlap in coverage and different requirements. This document aims to +give an overview of each one. + +Note: Paths in this document are relative to the kselftest folder +(``tools/testing/selftests``). + +Device oriented kselftests: + +* Devicetree (``dt``) + + * **Coverage**: Probe status for devices described in Devicetree + * **Requirements**: None + +* Error logs (``devices/error_logs``) + + * **Coverage**: Error (or more critical) log messages presence coming from any + device + * **Requirements**: None + +* Discoverable bus (``devices/probe``) + + * **Coverage**: Presence and probe status of USB or PCI devices that have been + described in the reference file + * **Requirements**: Manually describe the devices that should be tested in a + YAML reference file (see ``devices/probe/boards/google,spherion.yaml`` for + an example) + +* Exist (``devices/exist``) + + * **Coverage**: Presence of all devices + * **Requirements**: Generate the reference (see ``devices/exist/README.rst`` + for details) on a known-good kernel + +Therefore, the suggestion is to enable the error log and devicetree tests on all +(DT-based) platforms, since they don't have any requirements. Then to greatly +improve coverage, generate the reference for each platform and enable the exist +test. The discoverable bus test can be used to verify the probe status of +specific USB or PCI devices, but is probably not worth it for most cases.