[kvm-unit-tests PATCH v4 00/13] arm/arm64: Add kvmtool to the runner script

[Andrew Jones]

Hi Paolo, Thomas, and others,

This series has a subject of arm, but it makes lots of changes to
common scripts. Can I get an ack on it? I'd like to merge it.

Thanks,
drew


On Wed, Jun 25, 2025 at 04:48:00PM +0100, Alexandru Elisei wrote:
> v3 can be found here [1]. Based on top of the series that add qemu_params and
> test_args [2].
> 
> To goal is to allow the user to do:
> 
> $ ./configure --target=kvmtool
> $ make clean && make
> $ ./run_tests.sh
> 
> to run all the tests automatically with kvmtool.
> 
> Reasons to use kvmtool:
> 
> * kvmtool is smaller and a lot easier to modify compared to qemu, which
> means developers may prefer it when adding or prototyping new features to
> KVM, and being able to run all the tests reliably and automatically is very
> useful.
> 
> * kvmtool is faster to run the tests (a couple of times faster on
> my rockpro64), making for a quick turnaround. But do keep in mind that not
> all tests work on kvmtool because of missing features compared to qemu.
> 
> * kvmtool does things differently than qemu: different memory layout,
> different uart, PMU emulation is disabled by default, etc. This makes it a
> good testing vehicule for kvm-unit-tests itself.
> 
> Changes v3->v4
> --------------
> 
> Overview of the changes:
> 
> * Gathered Reviewed-by tags - thanks for the review!
> 
> * Sent patches #1 ("scripts: unittests.cfg: Rename 'extra_params' to
> 'qemu_params'") and #2 ("scripts: Add 'test_args' test definition parameter")
> as a separate series.
> 
> * Fixed the typos reported during the review.
> 
> * Ran shellcheck on the patches, this resulted in minor changes.
> 
> * Dropped patch "configure: Export TARGET unconditionally" - now the functions
> in vmm.bash will check if TARGET is set, instead of having the other scripts use
> $TARGET to directly index the vmm_opts array.
> 
> * Direct reads of $TARGET have been replaced with vmm_get_target(), to account
> for the fact that most architectures don't configure $TARGET (only arm and
> arm64 do that).
> 
> * Renamed check_vmm_supported() to vmm_check_supported() to match the
> function names introduced in subsequent patches.
> 
> * Renamed vmm_opts->vmm_optname to match the new function names.
> 
> * Reordered the key-value pairs from vmm_optname in alphabetical order.
> 
> * Use the "," separator for the composite keys of the associative array instead
> of ":" (don't remember why I originally settled on ":", but it was a really poor
> choice).
> 
> * Dropped the Reviewed-by tags from Drew and Shaoqin Huang from patch #6
> ("scripts: Use an associative array for qemu argument names") - the review is
> much appreciated, but the way the vmm_opts array (now renamed to vmm_optname) is
> created, and used, has changed, and since the patch is about introducing the
> associative array, I thought it would be useful to have another round of review.
> 
> * Use functions instead of indexing vmm_opts (now vmm_optname) directly.
> 
> * Fixed standalone test generation by removing 'source vmm.bash' from
> scripts/arch-run.bash, $arch/run and scripts/runtime, and having
> scripts/mkstandalone.sh::generate_test() copy it directly in the final test
> script. Didn't catch that during the previous iterations because I was
> running the standalone tests from the top level source directory, and
> "source scripts/vmm.bash" happened to work.
> 
> More details in the changelog for the modified patches.
> 
> [1] https://lore.kernel.org/kvm/20250507151256.167769-1-alexandru.elisei@arm.com/
> [2] https://lore.kernel.org/kvm/20250625154354.27015-1-alexandru.elisei@arm.com/
> 
> Alexandru Elisei (13):
>   run_tests.sh: Document --probe-maxsmp argument
>   scripts: Document environment variables
>   scripts: Refuse to run the tests if not configured for qemu
>   scripts: Use an associative array for qemu argument names
>   scripts: Add 'kvmtool_params' to test definition
>   scripts: Add support for kvmtool
>   scripts: Add default arguments for kvmtool
>   scripts: Add KVMTOOL environment variable for kvmtool binary path
>   scripts: Detect kvmtool failure in premature_failure()
>   scripts: Do not probe for maximum number of VCPUs when using kvmtool
>   scripts/mkstandalone: Export $TARGET
>   scripts: Add 'disabled_if' test definition parameter for kvmtool to
>     use
>   scripts: Enable kvmtool
> 
>  README.md               |  18 +++-
>  arm/efi/run             |   8 ++
>  arm/run                 | 161 ++++++++++++++++-----------
>  arm/unittests.cfg       |  31 ++++++
>  configure               |   1 -
>  docs/unittests.txt      |  26 ++++-
>  powerpc/run             |   5 +-
>  riscv/run               |   5 +-
>  run_tests.sh            |  35 +++---
>  s390x/run               |   3 +-
>  scripts/arch-run.bash   | 112 +++++++------------
>  scripts/common.bash     |  30 ++++--
>  scripts/mkstandalone.sh |   8 +-
>  scripts/runtime.bash    |  35 ++----
>  scripts/vmm.bash        | 234 ++++++++++++++++++++++++++++++++++++++++
>  x86/run                 |   5 +-
>  16 files changed, 525 insertions(+), 192 deletions(-)
>  create mode 100644 scripts/vmm.bash
> 
> -- 
> 2.50.0
> 
> 
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