Re: [PATCH] BIOS boot vs EFI system partition mountpoint

[Taylor R Campbell <riastradh%NetBSD.org@localhost>]

> Date: Sat, 20 Aug 2022 12:28:31 -0700
> From: Brian Buhrow <buhrow%nfbcal.org@localhost>
> 
> 	hello.  I fully agree with Robert, and for the same reason.
> Updating boot blocks unnecessarily is always a dicey
> proposition,especially when updating machines that are far away from
> knowledgable hands.

Can you please quote the part of my proposal or patch that involves
updating existing boot blocks?

The point is to allow _new_ images and installations to support BIOS
and EFI boot at the same time and have a standard mount point for the
EFI system partition.

Even if you go out of your way to use installboot(8) on your system to
install a new primary bootloader with my patch, and even if you don't
mv /boot /biosboot, the new primary bootloader will continue to find
the old secondary bootloader at /boot.

> To that end, I suggest /efiboot as a mount point.  It tells what it
> is, and if another booting technology comes along, it won't conflict
> with that.

Do you propose that it be different from what other platforms use, so
we don't end up with a standard mount point for the EFI system
partition?

Or do you propose to change other modern platforms to use /efiboot
instead of /boot as they currently do?  Will you volunteer to
implement the changes for your alternative proposal?

Note that on evbarm (and likely riscv), where /boot is a mount point
for the EFI partition on EFI systems, it is shared as a mount point
for device tree blobs on non-EFI systems and for other data such as
boot.cfg and cred_msdos(8).  The same mount point is also used by
evbmips for device tree blobs and other data, but evbmips doesn't do
EFI boot at all as far as I know.