Debian boot failure with UEFI runtime variables enabled

[Grant Likely]

On Thu, Jul 23, 2020 at 4:18 PM Heinrich Schuchardt <xypron.glpk at gmx.de> wrote:
>
> On 23.07.20 17:07, Grant Likely wrote:
> > On Thu, Jul 23, 2020 at 3:40 PM Heinrich Schuchardt <xypron.glpk at gmx.de> wrote:
> >>
> >> On 23.07.20 14:23, Grant Likely wrote:
> >>> Hi Heinrich,
> >>>
> >>> I've run into a problem with mainline U-Boot. Debian unstable (distro
> >>> kernel) fails to boot after commit b02a707152, "efi_loader: enable
> >>> UEFI variables at runtime". Kernel boots fine before that commit. Boot
> >>> log is attached. Looks like it is failing in a workqueue that is
> >>> calling runtime services; but I haven't dug in yet.
> >>>
> >>> I'm not doing anything exotic with this build. Mainline U-Boot,
> >>> mainline TFA, and booting the kernel with an up-to-date dtb.
> >>>
> >>> g.
> >>
> >> Hello Grant,
> >>
> >> this is the patch you are needing:
> >>
> >> https://lists.denx.de/pipermail/u-boot/2020-July/421193.html
> >> [PATCH 1/1] efi_loader: efi_current_var after SetVirtualAddressMap
> >
> > Got it. Working now. Thanks!
> > g.
> >
>
> There is also an issue to current Linux kernels fixed by:
>
> efi/efivars: Expose RT service availability via efivars abstraction
>
> https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git/commit/?id=f88814cc2578c121e6edef686365036db72af0ed
>
> Without the patch if SetVariable() is not available, you cannot access
> GetVariable() in Linux.

Also helpful. Thanks.
g.

>
> Best regards
>
> Heinrich