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Date: Sat, 8 Oct 2022 17:51:30 +0200 From: Borislav Petkov <bp@...en8.de> To: Ard Biesheuvel <ardb@...nel.org> Cc: linux-efi@...r.kernel.org, x86@...nel.org, linux-kernel@...r.kernel.org Subject: Re: [PATCH] efi: x86: Make the deprecated EFI handover protocol optional On Sat, Oct 08, 2022 at 05:41:40PM +0200, Ard Biesheuvel wrote: > Yeah most distros have ~100 ore more patches against GRUB, but this > isn't actually their fault. GRUB maintainership was defunct for a > number of years, which is why we were stuck on GRUB version 2.02-beta3 > for such a long time. But in recent years, things have been getting > better, and there is an agreement with the current maintainer not to > merge the EFI handover protocol, and merge the new EFI protocol based > initrd loading method instead, which works on all architectures > instead of only on x86. Aha, ok. > Never tried that in .S files but I guess it should just work. If not, at least in the .c files. > I'd venture a guess that this will break the boot even your own x86 > boxes, given that almost nobody uses plain upstream GRUB.. > > I can work with the distros directly to start disabling this in their > downstream configs once their GRUB builds are up to date with the new > changes, so we can phase this out in a controlled manner. Hm, that might turn out to be a multi-year effort considering how the enterprise distros' kernels are moving. Yeah, yeah, they have good reasons and so on. > But disabling tthis right now by default is going to affect everyone > who builds their own kernels and runs them on a distro Linux install. Ok, I can try it on my SUSE and Debian partitions and see what happens. Thx. -- Regards/Gruss, Boris. https://people.kernel.org/tglx/notes-about-netiquette
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