[PATCH v7 00/17] efi_loader: add capsule update support

[Tom Rini <trini@konsulko.com>]

On Wed, Nov 04, 2020 at 06:36:24PM +0900, AKASHI Takahiro wrote:
> Hi Tom,
> 
> On Thu, Oct 29, 2020 at 10:43:01AM -0400, Tom Rini wrote:
> > On Thu, Oct 29, 2020 at 01:47:40PM +0900, AKASHI Takahiro wrote:
> > 
> > > Summary
> > > =======
> > > 'UpdateCapsule' is one of runtime services defined in UEFI specification
> > > and its aim is to allow a caller (OS) to pass information to the firmware,
> > > i.e. U-Boot. This is mostly used to update firmware binary on devices by
> > > instructions from OS.
> > > 
> > > While 'UpdateCapsule' is a runtime services function, it is, at least
> > > initially, supported only before exiting boot services alike other runtime
> > > functions, [Get/]SetVariable. This is because modifying storage which may
> > > be shared with OS must be carefully designed and there is no general
> > > assumption that we can do it.
> > > 
> > > Therefore, we practically support only "capsule on disk"; any capsule can
> > > be handed over to UEFI subsystem as a file on a specific file system.
> > > 
> > > In this patch series, all the related definitions and structures are given
> > > as UEFI specification describes, and basic framework for capsule support
> > > is provided. Currently supported is
> > >  * firmware update (Firmware Management Protocol or simply FMP)
> > > 
> > > Most of functionality of firmware update is provided by FMP driver and
> > > it can be, by nature, system/platform-specific. So you can and should
> > > implement your own FMP driver(s) based on your system requirements.
> > > Under the current implementation, we provide two basic but generic
> > > drivers with two formats:
> > >   * FIT image format (as used in TFTP update and dfu)
> > >   * raw image format
> > > 
> > > It's totally up to users which one, or both, should be used on users'
> > > system depending on user requirements.
> > > 
> > > Quick usage
> > > ===========
> > > 1. You can create a capsule file with the following host command:
> > > 
> > >   $ mkeficapsule [--fit <fit image> | --raw <raw image>] <output file>
> > > 
> > > 2. Put the file under:
> > > 
> > >   /EFI/UpdateCapsule of UEFI system partition
> > > 
> > > 3. Specify firmware storage to be updated in "dfu_alt_info" variable
> > >    (Please follow README.dfu for details.)
> > > 
> > >   ==> env set dfu_alt_info '...'
> > > 
> > > 4. After setting up UEFI's OsIndications variable, reboot U-Boot:
> > > 
> > >   OsIndications <= EFI_OS_INDICATIONS_FILE_CAPSULE_DELIVERY_SUPPORTED
> > > 
> > > Patch structure
> > > ===============
> > > Patch#1-#4,#12: preparatory patches
> > > Patch#5-#11,#13: main part of implementation
> > > Patch#14-#15: utilities
> > > Patch#16-#17: pytests
> > > 
> > > [1] https://git.linaro.org/people/takahiro.akashi/u-boot.git efi/capsule
> > > 
> > > Prerequisite patches
> > > ====================
> > > None
> > > 
> > > Test
> > > ====
> > > * passed all the pytests which are included in this patch series
> > >   on sandbox build locally.
> > > 
> > > Please note that the capsule pytest itself won't be run in the CI
> > > partly because some specific configuration for sandbox build is
> > > required and partly because there is a problem with virt-make-fs.
> > > See test_efi_capsule_firmware.py.
> > 
> > Maybe we need to talk about this differently then.  Today, the tests
> > start on CI and then fail to run.  That's a problem that needs to be
> > fixed, they must "skip" properly.  I would really like to see these
> > tests run with every CI loop.  That means doing a "try virt-make-fs, if
> > that fails, try sudo, if that fails, skip".  That also means updating
> > some other tests that have logic for virt-make-fs, but it then causes CI
> > to fail rather than try sudo.
> 
> I think that you still misunderstand the point.
> Whatever you expect by saying "try virt-make-fs, if that fails, try sudo,
> if that fails, skip," Heinrich will *not* accept any test script that
> contains "sudo" command.
> I can do nothing here unless he changes his mind.
> 
> Or do you want to see the solution like "try virt-make-fs, if
> that fails, skip"?

Yes, you need to figure out some way to make the tests pass, without
sudo being present.  You also need to CI not fail if we can't run the
tests.  Further, it would be really nice if we could also run these
tests in CI.  Running the tests in CI may require sudo being used, just
like how that's the only way other tests are run in CI today.  That will
be acceptable.  Right Heinrich?

-- 
Tom
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