[PATCH v4] selftests/liveupdate: add end to end test infrastructure and scripts

[Pratyush Yadav]

On Fri, Jun 26 2026, Mike Rapoport wrote:

> From: Pasha Tatashin <pasha.tatashin at soleen.com>
>
> Add the end to end testing infrastructure required to verify the
> liveupdate feature. This includes a custom init process, a test
> orchestration script, and a batch runner.
>
> The framework consists of:
>
> init.c:
> A lightweight init process that manages the kexec lifecycle.
> It mounts necessary filesystems, determines the current execution
> stage (1 or 2) via the kernel command line, and handles the
> kexec_file_load() sequence to transition between kernels.
>
> vmtest.sh:
> The primary KTAP-compliant test driver. It handles:
> - Kernel configuration merging and building.
> - Cross-compilation detection for x86_64 and arm64.
> - Generation of the initrd containing the test binary and init.
> - QEMU execution with automatic accelerator detection (KVM, HVF,
>  or TCG).
>
> run-vmtests.sh:
> A wrapper that runs vmtest.sh for each LUO test across supported
> architectures, providing a summary of pass/fail/skip results.
>
> Signed-off-by: Pasha Tatashin <pasha.tatashin at soleen.com>
> Co-developed-by: Jordan Richards <jordanrichards at google.com>
> Signed-off-by: Jordan Richards <jordanrichards at google.com>
> Co-developed-by: Mike Rapoport (Microsoft) <rppt at kernel.org>
> Signed-off-by: Mike Rapoport (Microsoft) <rppt at kernel.org>

Acked-by: Pratyush Yadav <pratyush at kernel.org>

[...]

-- 
Regards,
Pratyush Yadav