Re: 24.3. Updating Bootcode

*** and "EFI Hard Drive"(legacy <ESP>/efi/boot/bootx64.efi) from BIOS.
                                                                   ^^^^

Nuno Teixeira <eduardo@freebsd.org> escreveu no dia quarta, 17/08/2022 à(s)
19:14:

> Hi,
>
> And it's done:
> ---
>  Boot0007* FreeBSD-14
> HD(1,GPT,73acd1b2-de41-11eb-8156-002b67dfc673,0x28,0x82000)/File(\efi\freebsd\loader.efi)
>                          nvd0p1:/efi/freebsd/loader.efi
> /boot/efi//efi/freebsd/loader.efi
> +Boot0006* FreeBSD-14_old
> HD(1,GPT,73acd1b2-de41-11eb-8156-002b67dfc673,0x28,0x82000)/File(\efi\freebsd\loader-old.efi)
>                              nvd0p1:/efi/freebsd/loader-old.efi
> /boot/efi//efi/freebsd/loader-old.efi
>  Boot0004* Windows Boot Manager
> HD(1,GPT,8c497825-1db2-41f8-8924-85dfd0bb7283,0x800,0x82000)/File(\EFI\Microsoft\Boot\bootmgfw.efi)
>                                    da1p1:/EFI/Microsoft/Boot/bootmgfw.efi
> (null)
>  Boot0000* EFI Hard Drive (SAMSUNG MZVLB1T0HBLR-000L2)
> PciRoot(0x0)/Pci(0x1d,0x0)/Pci(0x0,0x0)/NVMe(0x1,39-f9-b8-01-81-38-25-00)/HD(1,GPT,73acd1b2-de41-11eb-8156-002b67dfc673,0x28,0x82000)
> ---
> and I can choose "FreeBSD-14"(<ESP>/efi/freebsd/loader.efi),
> "FreeBSD-14_old"(<ESP>/efi/freebsd/loader-old.efi) and "EFI Hard
> Drive"(legacy <ESP>/efi/bootx64.efi) from BIOS.
>
> NOTE: efibootmgr(8) example is:
> ---
> efibootmgr -a -c -l /boot/efi/EFI/freebsd/loader.efi -L FreeBSD-11
>                                           ^^^
> ---
> But I choosed "efi" instead of "EFI"...
>
> Thanks all for helping me understand it!
>
> Cheers,
>
>
> Warner Losh <imp@bsdimp.com> escreveu no dia terça, 16/08/2022 à(s) 18:19:
>
>>
>>
>> On Tue, Aug 16, 2022 at 6:01 AM Nuno Teixeira <eduardo@freebsd.org>
>> wrote:
>>
>>> Hi Toomas,
>>>
>>> For better OS support, the UEFI specification (UEFI 2.8A Feb 14, page
>>>> 499) is suggesting to use structure like:
>>>>
>>>> <ESP>/efi/<OS>/…
>>>>
>>>> And to use this suggestion, it means the UEFI Boot Manager needs to be
>>>> configured (see efibootmgr(8)).
>>>>
>>>> Therefore, once you have set up OS specific setup, there is no use for
>>>> default (<ESP>/efi/boot/…) and you need to update one or another, but not
>>>> both.
>>>>
>>>
>>> FreeBSD have <ESP>/efi/freebsd/... but it's not configured in efibootmgr:
>>>
>>
>> The current default installer will do this, but older upgraded systems
>> don't do this by default. Likely you are looking at an older
>> system and/or one of the 'bad actors' that reset this stuff between boots.
>>
>>
>>> efibootmgr -v:
>>> ---
>>> BootOrder  : 0004, 0000, 2002, 2003, 2001
>>> Boot0004* Windows Boot Manager
>>> HD(1,GPT,8c497825-1db2-41f8-8924-85dfd0bb7283,0x800,0x82000)/File(\EFI\Microsoft\Boot\bootmgfw.efi)
>>>
>>>  da0p1:/EFI/Microsoft/Boot/bootmgfw.efi (null)
>>> +Boot0000* EFI Hard Drive (SAMSUNG MZVLB1T0HBLR-000L2)
>>> PciRoot(0x0)/Pci(0x1d,0x0)/Pci(0x0,0x0)/NVMe(0x1,39-f9-b8-01-81-38-25-00)/HD(1,GPT,73acd1b2-de41-11eb-8156-002b67dfc673,0x28,0x82000)
>>>  Boot2002* EFI DVD/CDROM
>>>  Boot2003* EFI Network
>>>  Boot2001* EFI USB Device
>>> ---
>>> so boot is definitely using <ESP>/efi/boot/bootx64.efi @Boot0000
>>>
>>
>> In your case, that's true. The "EFI Hard Drive" is a default entry the
>> UEFI BIOS created for you.
>>
>>
>>> I think I can create a new boot:
>>> ---
>>> efibootmgr -a -c -l /boot/efi/efi/freebsd/loader.efi -L FreeBSD-14
>>> (and make it active)
>>> efibootmgr -a -b NNNN
>>> ---
>>> and create other for loader.efi.old in case of problems.
>>>
>>
>> Yes.
>>
>>
>>> In this case I will need only update <ESP>/efi/freebsd/loader.efi.
>>>
>>> Q: for what has been said in mailing, boot is compiled in
>>> /usr/src/stand, isn't a good idea that when it install new boot it backup
>>> old boot like /boot/kernel -> /boot/kernel.old?
>>>
>>
>> Yes. In fact that's what's done, but only for the BIOS version. We should
>> do the same for efi but don't seem to do so currently. But that's likely
>> tied up behind issues of installing things automatically into the ESP on
>> 'installworld'.
>>
>> Warner
>>
>
>
> --
> Nuno Teixeira
> FreeBSD Committer (ports)
>


-- 
Nuno Teixeira
FreeBSD Committer (ports)