[PATCH v1 1/2] efi_loader: improve device path matching for partition lookup

[Ilias Apalodimas]

On Tue, 26 Aug 2025 at 12:07, Balaji Selvanathan
<balaji.selvanathan at oss.qualcomm.com> wrote:
>
> Hi Ilias,
>
>    Sorry for the late reply.
>    If i point to esp, then it should work.
>    But in the boot option generation, they are skipping if its a partition:
>              i.e., in:
> efi_bootmgr_enumerate_boot_options(), in this code (line 838):
>                  if (blkio->media->logical_partition)
>                          continue;
>    It seems that, by default, the boot option generation logic is not
> designed to include partition as a boot option; Not sure if this is
> intentional. If its not, then should we correct this logic?

Yes it was. In fact the original patches were adding the file instead
of the disk [1], but we had concerns on scanning all partitions wrt to
boot time. I don't remember if anyone tested the boot time though.

[1] https://lore.kernel.org/u-boot/A2082A91-A1CC-43E8-B151-968D7746B906@gmx.de/

Thanks
/Ilias
>  Your inputs
> are appreciated.
>
> On 8/5/2025 1:17 PM, Ilias Apalodimas wrote:
> > I am not sure this is a bug. The EFI spec says that in order to
> > trigger a capsule update you need to have an active boot option
> > pointing to the same ESP the capsule is installed.
> > Is your boot0000 automatically generated? If so it doesnt point to the
> > ESP and the capsule update doesn't trigger correctly. Does it work if
> > you manually add a boot option pointing to the ESP?