[PATCH] test/py: efi_capsule: Handle expected reset after capsule on disk

[AKASHI Takahiro]

On Tue, Mar 15, 2022 at 09:40:34AM +0900, Masami Hiramatsu wrote:
> Hi Simon,
> 
> 2022年3月15日(火) 3:24 Simon Glass <sjg at chromium.org>:
> >
> > > > OK, well 'reset by a user' presumably starts the board up and then
> > > > runs some code to do the update in U-Boot? Is that right? If so, we
> > > > just need to trigger that update from the test. We don't need to test
> > > > the actual reset, at least not with sandbox. As I said, we need to
> > > > write the code so that it is easy to test.
> > >
> > > Actually, we already have that command, "efidebug capsule disk-update"
> > > which kicks the capsule update code even without the 'reset by a
> > > user'. So we can just kick this command for checking whether the
> > > U-Boot UEFI code correctly find the capsule file from ESP which
> > > specified by UEFI vars.
> > >
> > > However, the 'capsule update on-disk' feature is also expected (and
> > > defined in the spec?) to run when the UEFI subsystem is initialized.
> > > This behavior will not be tested if we skip the 'reset by a user'. I
> > > guess Takahiro's current test case tries to check it.
> >
> > The 'UEFI subsystem is intialised' is a problem, actually, since if it
> > were better integrated into driver model, it would not have separate
> > structures or they would be present and enabled when driver model is.
> > I hope that it can be fixed and Takahiro's series is a start in that
> > direction.
> 
> OK.
> 
> > But as to a test that an update is called when UEFI starts, that seems
> > like a single line of code. Sure it is nice to test it, but it is much
> > more important to test the installation of the update and the
> > execution of the update. I suppose another way to test that is  to
> > shut down the UEFI subsystem and start it up?
> 
> Yes, currently we call do_reset() after install the capsule file.
> (This reset can be avoided if we replace it with
> sysreset_walk_halt(SYSRESET_COLD) as you said, right?)
> 
> Here is how I tested it on my machine;
> 
> > usb start
> > fatload usb 0 $kernel_addr_r test.cap
> > fatwrite mmc 0 $fileaddr EFI/UpdateCapsule/test.cap $filesize
> > efidebug capsule disk-update
> (run install process and reboot the machine)
> 
> So, if we can avoid the last reset, we can test the below without
> reset on sandbox (depends on scenarios).
> - confirm that the capsule update on disk can find the capsule file
> from ESP specified by the BOOTXXXX EFI variable.
> - confirm that the capsule update on disk writes the firmware
> correctly to the storage which specified by DFU.
> - confirm that the capsule update on disk success if the capsule image
> type is supported.
> - confirm that the capsule update on disk fails if the capsule image
> type is not supported.
> - confirm that the capsule update on disk will reboot after update
> even if the update is failed.
> 
> The only spec we can not test is
> - confirm that the capsule update on disk is kicked when the UEFI is
> initialized.

It is important to verify this feature in system test like pytest.

> >
> > Anyway we should design subsystems so they are easy to test.

Anyway we should design systems test so that they emulate operations
in real world.

-Takahiro Akashi

> Here I guess you mean the unit test, not system test, am I correct?
> 
> >
> > >
> > > > > Masami's patch (this series) fixes issues around those two resets
> > > > > in pytest.
> > > >
> > > > Yes and that is the problem I have, at least on sandbox.
> > >
> > > So If I I call sysreset_walk_halt(SYSRESET_COLD) after capsule update,
> > > it could help?
> >
> > Yes that can help, because sandbox can detect that and turn it into a nop.
> 
> OK, let me submit a patch to update it.
> 
> Thank you,
> 
> >
> > Regards,
> > Simon
> > [..]
> >
> > > > >
> > > > > > >
> > > > > > > > You should
> > > > > > > > be able to run a command to make the update happen. How does the
> > > > > > > > updata actually get triggered when you reset?
> > > > > > >
> > > > > > > It's not the purpose of this test.
> > > > > >
> > > > > > Then drop the reset and design the feature with testing in mind.
> > > > >
> > > > > So it's just beyond of my scope.
> > > > >
> > > > > -Takahiro Akashi
> > > > >
> > > > > > Regards,
> > > > > > SImon
> 
> 
> 
> -- 
> Masami Hiramatsu