Re: [PATCH] gitlab-ci: Add jobs to build standalone machines

["Alex Bennée" <alex.bennee@linaro.org>]

Philippe Mathieu-Daudé <f4bug@amsat.org> writes:

> The --without-default-devices configure option removes the
> 'default=y' from Kconfig files. It is useful to test missing
> Kconfig dependencies for users wanting to have QEMU (system)
> binaries with a particular subset of machines builtin.
>
> If a machine can be built standalone, it can certainly be
> built as part of a set. So the best way to test for regressions
> is to test each machine individually.
>
> As this is painful to test manually, add CI jobs to do it [*].
> Since all jobs follow the same template, to ease maintenance
> we generate the jobs using the jsonnet tool, which emit a YAML
> file filled with all our jobs.
>
> Since there is no "--enable-my-config" option, we have to write
> the standalone config manually, overwritting each target .mak
> file in default-configs/devices/.

Yet....

> The job is set to manual (there is no change in the current
> set of jobs), but can be started automatically by setting the
> QEMU_CI_STANDALONE_MACHINE_TESTING variable.

I'm wary of tests that don't get run automatically because it generally
means they won't be. However it also explodes the matrix with even more
builds so I can see the desire to avoid that.

>
> [*] https://docs.gitlab.com/ee/ci/yaml/#trigger-child-pipeline-with-generated-configuration-file
>
> Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
> ---
> Example: https://gitlab.com/philmd/qemu/-/pipelines/309272883
>
> Based-on: <20210525082556.4011380-1-f4bug@amsat.org>
> ---
>  .gitlab-ci.d/qemu-project.yml             |  1 +
>  .gitlab-ci.d/standalone-jobs-template.yml | 32 ++++++++++
>  .gitlab-ci.d/standalone-jobs.jsonnet      | 74 +++++++++++++++++++++++
>  .gitlab-ci.d/standalone-jobs.yml          | 27 +++++++++
>  .gitlab-ci.yml                            |  3 +
>  5 files changed, 137 insertions(+)
>  create mode 100644 .gitlab-ci.d/standalone-jobs-template.yml
>  create mode 100644 .gitlab-ci.d/standalone-jobs.jsonnet
>  create mode 100644 .gitlab-ci.d/standalone-jobs.yml
>
> diff --git a/.gitlab-ci.d/qemu-project.yml b/.gitlab-ci.d/qemu-project.yml
> index 64cb2ba1da5..4018c48761c 100644
> --- a/.gitlab-ci.d/qemu-project.yml
> +++ b/.gitlab-ci.d/qemu-project.yml
> @@ -9,3 +9,4 @@ include:
>    - local: '/.gitlab-ci.d/crossbuilds.yml'
>    - local: '/.gitlab-ci.d/buildtest.yml'
>    - local: '/.gitlab-ci.d/static_checks.yml'
> +  - local: '/.gitlab-ci.d/standalone-jobs.yml'
> diff --git a/.gitlab-ci.d/standalone-jobs-template.yml b/.gitlab-ci.d/standalone-jobs-template.yml
> new file mode 100644
> index 00000000000..23e60cb4069
> --- /dev/null
> +++ b/.gitlab-ci.d/standalone-jobs-template.yml
> @@ -0,0 +1,32 @@
> +.native_build_standalone_job_template:
> +  stage: build
> +  image: $CI_REGISTRY_IMAGE/qemu/$IMAGE:latest
> +  variables:
> +    IMAGE: fedora
> +    CONFIGURE_ARGS:
> +      --without-default-devices
> +      --disable-user
> +      --disable-tools
> +      --disable-docs
> +  before_script:
> +    - JOBS=$(expr $(nproc) + 1)
> +  script:
> +    - for target in $TARGETS ; do
> +        echo > default-configs/devices/${target}-softmmu.mak ;
> +        for line in $DEVICE_CONFIGS ; do
> +          echo "$line"
> +          echo "$line" > default-configs/devices/${target}-softmmu.mak ;
> +        done ;
> +      done
> +    - mkdir build
> +    - cd build
> +    - ../configure --enable-werror $CONFIGURE_ARGS --target-list="$TARGETS"
> +      || { cat config.log meson-logs/meson-log.txt && exit 1; }
> +    - QEMU_BINS=$(echo $(for target in $TARGETS; do echo qemu-system-${target//-softmmu/}; done))
> +    - make -j"$JOBS" $QEMU_BINS
> +    - for binary in $QEMU_BINS ; do
> +        for machine in $(./$binary -M help | egrep -v "^(Supported|none)" | awk '{print $1}') ; do
> +            echo "=== testing $machine with $binary ===" ;
> +            echo q | ./$binary -M $machine -nodefaults -display none $TESTING_ARGS -monitor stdio -S || exit 1 ;
> +        done ;
> +      done
> diff --git a/.gitlab-ci.d/standalone-jobs.jsonnet b/.gitlab-ci.d/standalone-jobs.jsonnet
> new file mode 100644
> index 00000000000..6f403a51091
> --- /dev/null
> +++ b/.gitlab-ci.d/standalone-jobs.jsonnet
> @@ -0,0 +1,74 @@
> +local param_job(targets, configs, cmdline="") =
> +  {
> +    extends: ".native_build_standalone_job_template",
> +
> +    variables: {
> +      TARGETS: targets,
> +      DEVICE_CONFIGS: configs,
> +      TESTING_ARGS: cmdline,
> +    }
> +  };

I'm reluctant to have a parallel configuration architecture here. If we
are going to test these then let's get the configure support in first.

> +
> +{
> +  include: { "local": "/.gitlab-ci.d/standalone-jobs-template.yml" },
> +
> +    "alpha dp264": param_job("alpha-softmmu", "CONFIG_DP264=y"),
> +    "avr arduino": param_job("avr-softmmu", "CONFIG_ARDUINO=y"),
> +    "hppa dino": param_job("hppa-softmmu", "CONFIG_DINO=y"),
> +    "nios2 10m50": param_job("nios2-softmmu", "CONFIG_NIOS2_10M50=y"),
> +    "nios2 nommu": param_job("nios2-softmmu", "CONFIG_NIOS2_GENERIC_NOMMU=y"),
> +    "or1k sim": param_job("or1k-softmmu", "CONFIG_OR1K_SIM=y"),
> +    "rx gdbsim": param_job("rx-softmmu", "CONFIG_RX_GDBSIM=y", "-bios /dev/null"),
> +    "triboard": param_job("tricore-softmmu", "CONFIG_TRIBOARD=y"),
> +    "xtensa sim": param_job("xtensaeb-softmmu", "CONFIG_XTENSA_SIM=y CONFIG_SEMIHOSTING=y"),
> +    "xtensa virt": param_job("xtensa-softmmu", "CONFIG_XTENSA_VIRT=y CONFIG_SEMIHOSTING=y"),

Do we really have a plethora of users running trimmed down custom
configurations that we need to defend each of these exotic build
combinations in the CI?

> +
> +  // i386
> +    "x86 isapc": param_job("i386-softmmu", "CONFIG_ISAPC=y"),
> +    "x86 microvm": param_job("x86_64-softmmu", "CONFIG_MICROVM=y"),

> +  // s390x
> +    "s390 ccw": param_job("s390x-softmmu", "CONFIG_S390_CCW_VIRTIO=y"),

I think is possibly a valid use case. 

<snip>
> +  // microblaze
> +    "mb zynqmp-pmu": param_job("microblaze-softmmu", "CONFIG_XLNX_ZYNQMP_PMU=y"),
> +    "mb ml605": param_job("microblaze-softmmu", "CONFIG_PETALOGIX_ML605=y"),
> +    "mb s3adsp1800": param_job("microblaze-softmmu", "CONFIG_PETALOGIX_S3ADSP1800=y"),
> +
> +  // mips
> +    "mips jazz": param_job("mips64-softmmu", "CONFIG_FULOONG=y"),
> +    "mips loongson3v": param_job("mips64-softmmu", "CONFIG_LOONGSON3V=y"),
> +    "mips malta": param_job("mips-softmmu mipsel-softmmu", "CONFIG_MALTA=y", "-bios /dev/null"),
> +
> +  // riscv
> +    "riscv opentitan": param_job("riscv32-softmmu", "CONFIG_OPENTITAN=y"),

Again I'm not sure how many emulation targets really want to cut down to
a minimal configuration.

-- 
Alex Bennée