From mboxrd@z Thu Jan 1 00:00:00 1970 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 lists.gnu.org (lists.gnu.org [209.51.188.17]) (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 7BFCBC433EF for ; Tue, 28 Jun 2022 07:33:50 +0000 (UTC) Received: from localhost ([::1]:60888 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1o65jH-0004bk-Pk for qemu-devel@archiver.kernel.org; Tue, 28 Jun 2022 03:33:49 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:52052) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1o64Ma-0001pS-Mv for qemu-devel@nongnu.org; Tue, 28 Jun 2022 02:06:16 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.129.124]:56416) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1o64MU-0001FG-U1 for qemu-devel@nongnu.org; Tue, 28 Jun 2022 02:06:13 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1656396369; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=ooxKuo5p6q4+Fm734fNgl0NbdvMRBn1TcT4KuQhTEo4=; b=EsNE+jx5DtmobmeYxgPmUPBBens7tExbcf5AKePcdeHX6p+RAPjFSPge8vqaEKp+c7+iSW evTVJcXPSdR1L/qIgJTKG1Q7BaWJylfU939gJ/W1YQzAjnnspzLYAI5DQ4AtMAMDKGAnup 6uPEcsQ171fV8NHq8Wy3uEaMclOXqhQ= Received: from mail-wr1-f72.google.com (mail-wr1-f72.google.com [209.85.221.72]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-275-3Pa-oj69Mk-65vRW65-gVw-1; Tue, 28 Jun 2022 02:06:08 -0400 X-MC-Unique: 3Pa-oj69Mk-65vRW65-gVw-1 Received: by mail-wr1-f72.google.com with SMTP id j14-20020adfa54e000000b0021b8c8204easo1472655wrb.0 for ; Mon, 27 Jun 2022 23:06:08 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:date:from:to:cc:subject:message-id:references :mime-version:content-disposition:content-transfer-encoding :in-reply-to; bh=ooxKuo5p6q4+Fm734fNgl0NbdvMRBn1TcT4KuQhTEo4=; b=4fJA6s/ILpQ+XHDb1LfvvGKbNLwWft2jo0R2y6ohXYmh8bjE5lpPCV/N5a28XEpntE aii/W8l/vPyNFMtOvlpDH/5g29tv8InNL2AKlkU0DCbor3jbSSd0b+sTDvuvNLDRJVJE pjksVWRz9iL26Sb7VDTqdQvELYobRE7Q1y1QnCRZgRYAgOKOPYAMMn9tOs5yEOlou/f0 De7Dm9VTY/7bSQ/iMkwIiXgGbihcYyHUgT+kKs6ufPtFIvIdAoFu1lufLHpvsAmr1Oe+ d0oCNC/ur73CQRByD8QRWXAM1Cr8uh98sW5AYa5b76mHIvoh6nBV7N86wzyHRorhQ4uL +AFw== X-Gm-Message-State: AJIora8D4pUmqKzcctQWiEcrNZAGNGCQGgzBKoR6WyH/GJikWfP/db8W cyLTKFCvzp219a3EdAGtjP5fn1jVmGf0F9Z9doAr1pOTEv/LDEtvX7e/xktqrbBVNfV5XKMNCQa u2QBwM1yn208Zlek= X-Received: by 2002:a05:600c:3845:b0:3a0:286b:2a10 with SMTP id s5-20020a05600c384500b003a0286b2a10mr23412369wmr.147.1656396366506; Mon, 27 Jun 2022 23:06:06 -0700 (PDT) X-Google-Smtp-Source: AGRyM1vgJF4GtuC4sDy7tYEp9p1loKEi+zkxVcQcC/mAsoyqWYz1E1RBktOiKxXVfVy7X438mrFMEQ== X-Received: by 2002:a05:600c:3845:b0:3a0:286b:2a10 with SMTP id s5-20020a05600c384500b003a0286b2a10mr23412326wmr.147.1656396366019; Mon, 27 Jun 2022 23:06:06 -0700 (PDT) Received: from redhat.com ([2.52.23.204]) by smtp.gmail.com with ESMTPSA id n12-20020a5d420c000000b0021b8d1b0568sm12762425wrq.52.2022.06.27.23.06.03 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 27 Jun 2022 23:06:05 -0700 (PDT) Date: Tue, 28 Jun 2022 02:06:01 -0400 From: "Michael S. Tsirkin" To: Ani Sinha Cc: qemu-devel@nongnu.org, Thomas Huth , Laurent Vivier , Paolo Bonzini , imammedo@redhat.com Subject: Re: [PATCH 11/12] acpi/tests/bits: add README file for bits qtests Message-ID: <20220628020017-mutt-send-email-mst@kernel.org> References: <20220627072856.1529357-1-ani@anisinha.ca> <20220627072856.1529357-12-ani@anisinha.ca> <20220627182027-mutt-send-email-mst@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline Content-Transfer-Encoding: 8bit In-Reply-To: Received-SPF: pass client-ip=170.10.129.124; envelope-from=mst@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -28 X-Spam_score: -2.9 X-Spam_bar: -- X-Spam_report: (-2.9 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.082, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" On Tue, Jun 28, 2022 at 10:27:38AM +0530, Ani Sinha wrote: > On Tue, Jun 28, 2022 at 3:56 AM Michael S. Tsirkin wrote: > > > > On Mon, Jun 27, 2022 at 12:58:55PM +0530, Ani Sinha wrote: > > > The README file is added describing the directory structure and the purpose > > > of every file it contains. It also describes how to add new tests, make changes > > > to existing tests or bits config files or regenerate the bits software. > > > > > > Signed-off-by: Ani Sinha > > > --- > > > tests/qtest/acpi-bits/README | 168 +++++++++++++++++++++++++++++++++++ > > > 1 file changed, 168 insertions(+) > > > create mode 100644 tests/qtest/acpi-bits/README > > > > > > diff --git a/tests/qtest/acpi-bits/README b/tests/qtest/acpi-bits/README > > > new file mode 100644 > > > index 0000000000..97b15f1665 > > > --- /dev/null > > > +++ b/tests/qtest/acpi-bits/README > > > @@ -0,0 +1,168 @@ > > > +============================================================================= > > > +ACPI/SMBIOS QTESTS USING BIOSBITS > > > +============================================================================= > > > + > > > +Biosbits is a software written by Josh Triplett that can be downloaded by > > > +visiting https://biosbits.org/. The github codebase can be found here: > > > +https://github.com/biosbits/bits/tree/master. It is a software that exercizes > > > +the bios components such as acpi and smbios tables directly through acpica > > > +bios interpreter (a freely available C based library written by Intel, > > > +downloadable from https://acpica.org/ and is included with biosbits) without an > > > +operating system getting involved in between. > > > +There are several advantages to directly testing the bios in a real physical > > > +machine or VM as opposed to indirectly discovering bios issues through the > > > +operating system. For one thing, the OSes tend to hide bios problems from the > > > +end user. The other is that we have more control of what we wanted to test > > > +and how by directly using acpica interpreter on top of the bios on a running > > > +system. More details on the inspiration for developing biosbits and its real > > > +life uses can be found in (a) and (b). > > > +This directory contains QEMU qtests written in python that exercizes the QEMU > > > +bios components using biosbits and reports test failures. > > > + > > > +These tests use python virtual environment. In debian/ubuntu system, the tests > > > +would require python3.8-venv and python3-pip packages to be installed. > > > > Why do we mess with venv and pip? Certainly possible but > > what's wrong with using distro provided packages? > > There are two things: > (a) We are already using pip and venv for our avocado based > integration tests. Look for TESTS_VENV_DIR in Makefile.include under > tests. > (b) the venv is primarily needed because I wanted to take advantage of > our rich python library that handles QEMU based machines. There are > python qtest libraries as well. These are well tested and used with > integration tests and I wanted to keep the test part of the code > simple by simply reusing them. however, in order to use them, we need > a venv environment within which these qemu python libraries are > installed. Integration tests does the same thing. > > A note about my language of choice - python. I gave a lot of thoughts > on this. We do not do a lot of stuff here. All we do is: > (a) generate bits iso. > (b) spawn a QEMU vm with the iso which then runs a bunch of tests within the vm. > (c) collect and analyze logs. > > We are not inspecting guest memory or manipulating devices or pci > buses. We do not need the power of C here. We need something that is > simple to write, easy to maintain and understand and can deal with > things like manipulating text files and configs easily. Python seems a > better fit for the role. No problem with that. So that's venv. But do we need pip and pulling packages from the net during testing? > > > > > + > > > +A brief description of the contents of this directory follows: > > > + > > > +├── acpi-bits-test.py > > > +├── acpi-bits-test-venv.sh > > > +├── bits-config > > > +│ ├── bits-cfg.txt > > > +│ └── meson.build > > > +├── bits-tests > > > +│ ├── meson.build > > > +│ ├── smbios.py > > > +│ ├── smilatency.py > > > +│ ├── testacpi.py > > > +│ └── testcpuid.py > > > +├── meson.build > > > +├── prebuilt > > > +│ ├── bits-2095-grub.tar.gz > > > +│ ├── bits-2095.zip > > > +│ └── meson.build > > > +├── README > > > +└── requirements.txt > > > + > > > +acpi-bits: > > > + - acpi-bits-test-venv.sh: This is a shell script that sets up the virtual > > > + environment necessary for the actual python test script to run. Amongst > > > + other things, it makes sure that QEMU python library is available within > > > + that venv so that QEMU machines can be forked. QEMU python library can be > > > + found within python/ directory in QEMU source. > > > + After setting up the virtual environment, it runs the python test script > > > + from within that environment. > > > + If you want to enable verbose mode only for bits test and run make check, > > > + one trick is to add V=1 before the call to execute the python script in > > > + this file. > > > + - acpi-bits-test.py: This is the main python test script that generates a > > > + biosbits iso. It then spawns a QEMU VM with it, collects the logs and reports > > > + test failures. This is the script one would be interested in if they wanted > > > + to add or change some component of the log parsing, add a new commandline to > > > + how QEMU is spawned etc. Test writers typically would not need to modify > > > + this script unless they wanted to enhance or change the log parsing for > > > + their tests. > > > + - requirements.txt: This text file contains the dependent python libraries > > > + needed for the tests to run. If a new dependent library is needed, it would > > > + be added here as a new entry and then acpi-bits-test-venv.sh would install > > > + it when setting up the python virtual environment using pip. > > > + - README: This text file. > > > + > > > +acpi-bits/bits-config: > > > + This location contains biosbits config files that determine how the software > > > + runs the tests. > > > + - bits-config.txt: this is the biosbits config file that determines what tests > > > + or actions are performed by bits. The description of the config options are > > > + provided in the file itself. > > > + > > > +acpi-bits/prebuilt: > > > + This location contains prebuilt biosbits binaries that are used to generate > > > + the bits iso file for testing. > > > + - bits-2095.zip: The contents from this zip archive are the main contents of > > > + the iso file that are used for testing. This binary zip archive also > > > + contains the full source of the bits software including the full text of > > > + the license agreement listed here: > > > + https://github.com/biosbits/bits/blob/master/COPYING > > > + The source tarball can be found in this location in the zip file: > > > + boot/src/bits-2095.tar.gz > > > + The additional changes beyond those that are present in the official > > > + biosbits github repository can be found here: > > > + https://github.com/ani-sinha/bits/tree/bits-qemu-logging > > > + > > > + Basically these changes can be categorized into the following: > > > + (a) changes to make sure biosbits builds with the latest gcc compiler > > > + (gcc 9.4). > > > + (b) upgrade of acpica to the latest version (march 2022). > > > + (c) send bits logs to the debug IO port at addresss 0x403 so that isa > > > + debugcon can be used to collect the logs. > > > + (d) send a gub halt command to shutdown the VM once all the tests have been > > > + executed. > > > + > > > + This zip file is automatically generated by the bits build system. It can > > > + be found in the bits build directory and it is suffixed by the bits build > > > + number. > > > + Normally, there is no need to make any alteration to this zip archive > > > + unless one wanted to change the bits software itself (for example to add > > > + a new config option or change actions of existing options or change the > > > + debug IO port etc). When such changes are made and a new biosbits software > > > + is needed to be generated, please refresh this zip archive as well as the > > > + grub tarball at the same time. Tests will break if changes are made to bits > > > + that are incompatible with existing behavior. So care must be taken to make > > > + sure that the change is compatible with existing bits software as much as > > > + possible. When a new config option is introduced for example, bits must > > > + be upadated here first before introducing the new config option through > > > + a later commit. > > > > I don't think playing with source tarballs is a reasonable work environment. > > I agree. However, we do not do much with the source tarball. It is > there as part of bits to satisfy the license requirement. If we need > to manipulate any test script that is in the source file, we would > copy it over and keep it in the bits-test directory and change it > there. > > > Let's use submodules just like e.g. firmware does? > > Yes I also proposed this to Igor on IRC. We can/maybe need to figure > out a place to store the bits source if we think my github is not the > best place. However, we need the source only if/when we need to > rebuild bits. I suspect it won't be too often if at all. Why not on git.qemu.org ? > > > > > > > > > + - prebuilt/bits-2095-grub.tar.gz: This tarbball contains bits generated grub > > > + scripts and modules to the prebuilt directory. These prebuilt grub > > > + artifacts are required in order to generate a bootable bits iso file that > > > + can run tests. > > > + In order to generate this tar archive, please put the following two > > > + directories that can be found in the bits build directory in a single > > > + tar archive file named as bits--grub.tar.gz where n is the version of > > > + bits that generated the archive: > > > + > > > + grub-inst-x86_64-efi > > > + grub-inst > > > + > > > + This version should be the same as the version number of bits that generated > > > + bits-.zip file. In other words, the two files must be in sync and should > > > + come from the same build of biosbits of the same version. Things may still > > > + work if they come from different versions but mixing version numbers are > > > + not recommended. > > > + There is normally no need to regenerate this archive unless some fixes or > > > + changes have gone into the grub that are part of biosbits. > > > + > > > +acpi-bits/bits-tests: > > > + This directory contains biosbits python based tests that are run from within > > > + the biosbits environment in the spawned VM. New additions of test cases can > > > + be made in the appropriate test file. For example, new acpi tests can go > > > + into testacpi.py and one would call testsuite.add_test() to register the new > > > + test so that it gets executed as a part of the ACPI tests. > > > + It might be occassionally necessary to disable some subtests or add a new > > > + test that belongs to a test suite not already present in this directory. To > > > + do this, please extract the bits source from the zip file mentioned above. > > > + Copy the test suite/script that needs modification (addition of new tests > > > + or disabling them) from boot/python location of the extracted directory > > > + into this directory. > > > + > > > + step (a): copy unmodified test script to this directory. > > > + step (b): update meson.build and add this file to the list. > > > + Commit (a) and (b) together in the same commit. > > > + > > > + step (c): perform modifications to the test. > > > + Commit (c) in a separate commit. > > > + > > > + The test framework will then use your modified test script to run the test. > > > + No further changes would be needed. Please check the logs to make sure that > > > + appropriate changes have taken effect. > > > + > > > +meson.build files makes sure that the bits qtests are appropriately integrated > > > +into the QEMU qtest framework and are run with "make check-qtest". > > > +Currently, the bits test is configured to run only for x86_64 architectures. Bits > > > +has been built only for this architecture. > > > + > > > + > > > +Author: Ani Sinha > > > + > > > +References: > > > +(a) https://blog.linuxplumbersconf.org/2011/ocw/system/presentations/867/original/bits.pdf > > > +(b) https://www.youtube.com/watch?v=36QIepyUuhg > > > -- > > > 2.25.1 > >