[PATCH v9 02/11] efi_loader: Add a test app

[Tom Rini]

On Tue, Oct 29, 2024 at 08:22:10PM +0100, Simon Glass wrote:

> Add a simple app to use for testing. This is intended to do whatever it
> needs to for testing purposes. For now it just prints a message and
> exits boot services.
> 
> There was a considerable amount of discussion about whether it is OK to
> call exit-boot-services and then return to U-Boot. This is not normally
> done in a real application, since exit-boot-services is used to
> completely disconnect from U-Boot. However, since this is a test, we
> need to check the results of running the app, so returning is necessary.
> It works correctly and it provides a nice model of how to test the EFI
> code in a simple way.
> 
> Signed-off-by: Simon Glass <sjg at chromium.org>

This approach has been specifically rejected with an explained
rationale: It breaks how UEFI applications work and you cannot run
further UEFI tests in sandbox without resetting.

Since as you note, you can't reset in a C-based test, rework this to be
a python test where we can safely reset the system and verify that. I
believe Heinrich even noted that a test which checks ExitBootServices()
working as expected would be helpful as we only have a watchdog test
currently.

-- 
Tom
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