[PATCH 3/3] efi_loader: disk: add EFI_PARTITION_INFO_PROTOCOL support

[Tom Rini]

On Fri, Jun 13, 2025 at 06:59:33PM +0200, Javier Martinez Canillas wrote:
> Tom Rini <trini at konsulko.com> writes:
> 
> Hello Tom,
> 
> > On Fri, Jun 13, 2025 at 04:54:48PM +0200, Javier Martinez Canillas wrote:
> 
> [...]
> 
> >> The project is https://gitlab.com/CentOS/automotive/src/ukiboot and reads
> >> UKI (https://uapi-group.org/specifications/specs/unified_kernel_image)
> >> images from raw data partitions. Just like ABL reads Android Boot images.
> >> 
> >> > Are you planning to add it to the EBBR specification?
> >> >
> >> 
> >> I haven't thought about it before but I also didn't know that u-boot had
> >> this requirement. Probably it should be documented somewhere to make it
> >> more clear? Maybe I didn't look enough but didn't find a doc in the repo.
> >
> > We are not strictly and only EBBR requirements, if there is good reason
> 
> That's good to know. Heinrich's answer seemed to imply that u-boot was
> limited to EBBR requirements.

It's one of the main users, yes, but it shouldn't be seen as *only* for
that.

> > to add more features (and tests). But Heinrich's follow-up question is
> 
> Oh, I missed the lib/efi_selftest directory. I'll see to add a test then.

Thanks.

> > quite important. I feel like there's already a half dozen offerings of
> > A/B update that works within UEFI.
> >
> 
> I just brought the A/B boot protocol used by ukiboot because I was asked
> how I was using the EFI_PARTITION_INFO_PROTOCOL. But I'm not proposing to
> add a new A/B update mechanism for u-boot, just to implement an existing
> EFI protocol...

Yes, this was more a lament for the ecosystem as a whole really. The
concept of A/B(/Golden) with various security features is pretty old at
this point, there's many implementations. I wish there was not "here is
yet another" in the space.

But regardless, we should aim to have U-Boot be able to be used with it.
Otherwise my crystal ball says that a few years down the line it'll be
hard to use Fedora-IoT-distro on common-device with U-Boot.

-- 
Tom
-------------- next part --------------
A non-text attachment was scrubbed...
Name: signature.asc
Type: application/pgp-signature
Size: 659 bytes
Desc: not available
URL: <https://lists.denx.de/pipermail/u-boot/attachments/20250613/7127bc05/attachment.sig>