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Date:      Thu, 17 Dec 2020 10:41:46 -0700
From:      Warner Losh <imp@bsdimp.com>
To:        Lev Serebryakov <lev@freebsd.org>
Cc:        Poul-Henning Kamp <phk@phk.freebsd.dk>, "freebsd-hackers@freebsd.org" <hackers@freebsd.org>
Subject:   Re: Should/does loader.efi respect the "bootme" GPT attribute ?
Message-ID:  <CANCZdfpHzPt8Nr0BS9u=J7dCWP9SjpRWfurwEfTUiCO%2B7XK6rA@mail.gmail.com>
In-Reply-To: <63257157-9cdd-0da4-f061-4005319514c2@FreeBSD.org>
References:  <25469.1608040822@critter.freebsd.dk> <CANCZdfpcrXcgnh1O74A-MhSO2NFqTtq0rJrBDpEfwgxbVDPN8A@mail.gmail.com> <26111.1608051101@critter.freebsd.dk> <CANCZdfqhi742n9V%2BwCzhniB3QU5Equo%2BsnEOz0xQ2GmPKo27PQ@mail.gmail.com> <63257157-9cdd-0da4-f061-4005319514c2@FreeBSD.org>

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On Thu, Dec 17, 2020 at 6:19 AM Lev Serebryakov <lev@freebsd.org> wrote:

> On 15.12.2020 23:10, Warner Losh wrote:
> > On Tue, Dec 15, 2020 at 9:51 AM Poul-Henning Kamp <phk@phk.freebsd.dk>
>
> >>> It is intentional. UEFI really doesn't want you using non-standard
> >>> partition flags to determine boot order.
> >>
> >> So how would one go about doing "boot0/nanobsd-style" dual
> >> root the "proper" way in an UEFI environment ?
> >>
> >
> > By using gptboot.efi in the ESP and placaing loader.efi in the UFS
> > partitions...
>   But You've said, that:
>
>  > UEFI has its own bootnext protocol, that works in conjunction with the
> EFI
>  > environment variables to have a more robust, less 'guess what I mean'
>  > approach. So all in all, it's hard, non-standard and doesn't play well
> with
>  > UEFI."
>
>   Could it be used here?
>

Yes. It can.

Warner



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