Multi Stage Bootloader Support

Salih B

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May 15, 2019, 10:30:07 AM5/15/19

to EFI Boot Guard

Hello All,

I want to use GRUB to call efibootguard as a staged way. Is it possible to call efibootguard over GRUB? Do you have any experience for this use case? Thanks.

Jan Kiszka

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May 15, 2019, 12:17:12 PM5/15/19

to Salih B, EFI Boot Guard

I suppose grub-efi can also start efi binaries, and that's what ebg is.

Why would you like to do that? What feature do you need from grub, what from
ebg? Managing such a the boot chain will not become easier by extending it.

Jan

Salih Bakir

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May 16, 2019, 2:10:14 AM5/16/19

to EFI Boot Guard

I am working on it for the test automation. Currently, I have encrypted disk which is booted from ebg and I have on alive usb stick which is used for flashing new image to disk and boot to new freshly image. So, I have GRUB installed on USB stick and want to boot disk which has EBG over GRUB.

15 Mayıs 2019 Çarşamba 19:17:12 UTC+3 tarihinde Jan Kiszka yazdı:

Jan Kiszka

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May 16, 2019, 6:55:54 AM5/16/19

to Salih Bakir, EFI Boot Guard

On 16.05.19 08:10, Salih Bakir wrote:
> I am working on it for the test automation. Currently, I have encrypted disk
> which is booted from ebg and I have on alive usb stick which is used for
> flashing new image to disk and boot to new freshly image. So, I have GRUB
> installed on USB stick and want to boot disk which has EBG over GRUB.
>

Try the chainloader command from grub on that. It seems to work with all
supported image formats, including efi (provided you use grub-efi). But this is
a grub topic, nothing ebg-specific.

Jan

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