[RFC 3/8] boot: make BOOTMETH_EFILOADER default=n

[Simon Glass]

Hi Heinrich,

On Fri, 2 May 2025 at 10:16, Heinrich Schuchardt
<heinrich.schuchardt at canonical.com> wrote:
>
> On 5/2/25 16:49, Simon Glass wrote:
> > Hi Heinrich,
> >
> > On Mon, 21 Apr 2025 at 10:26, Heinrich Schuchardt
> > <heinrich.schuchardt at canonical.com> wrote:
> >>
> >> The boot method is deprecated as the EFI boot manager covers this
> >> functionality.
> >>
> >> Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt at canonical.com>
> >> ---
> >>   boot/Kconfig | 1 -
> >>   1 file changed, 1 deletion(-)
> >>
> >> diff --git a/boot/Kconfig b/boot/Kconfig
> >> index 71ddb37f6bb..b973d9eb0a7 100644
> >> --- a/boot/Kconfig
> >> +++ b/boot/Kconfig
> >> @@ -595,7 +595,6 @@ config BOOTMETH_EFILOADER
> >>          bool "Bootdev support for EFI boot"
> >>          depends on EFI_BINARY_EXEC
> >>          imply CMD_TFTPBOOT if CMD_NET
> >> -       default y
> >>          help
> >>            This bootmeth is obsolete. BOOTMETH_EFI_BOOTMGR takes care of
> >>            launching EFI\BOOT\BOOT<ARCH>.EFI if not boot option matches.
> >> --
> >> 2.48.1
> >>
> >
> > As mentioned on the other patch, we need to keep this enabled and it
> > isn't obsolete.
> >
> > Regards,
> > Simon
>
> Please, read the UEFI specification especially chapter 3 "Boot Manager".
>
> * The functionality is fully covered by the boot manager.
> * The current implementation of the method does not comply with the UEFI
> specification. Especially if run before the boot manager.

We're going to have to go through this together sometime as it seems
like chicken & egg to me. We don't want Boot Manager first because it
is slow and stuffs up FEL on sunxi etc., we don't want it last because
then it has to wait for networking, we don't know whether bootmgr is
being used or not, so we just have to put it in the middle, but then
we don't know whether it will succeed, at which point we have to go
back and try the whole boot again..?

Regards,
Simon