* Pass disk context to GRUB
@ 2020-06-23 15:52 Garrett Brown
0 siblings, 0 replies; only message in thread
From: Garrett Brown @ 2020-06-23 15:52 UTC (permalink / raw)
To: u-boot
Hello,
I'm trying to enable UEFI dual-booting on the BeagleBone black. U-Boot
knows to boot from SD if present, and eMMC if not. However, U-Boot doesn't
pass the disk "context" to GRUB; GRUB always thinks it's booting from
`hd0`, and doesn't know what to use for the kernel's `root` parameter.
I checked the UEFI API, and it seems U-Boot passes a handle to the disk
that the GRUB EFI loader was loaded from. Is it possible to also pass a
value that can be used to determine the kernel's `root` based on if we're
booting from SD or eMMC (and in the future, USB)?
For more context, see
https://github.com/mendersoftware/meta-mender/pull/1010#issuecomment-647172447
.
Thank you,
Garrett
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2020-06-23 15:52 Pass disk context to GRUB Garrett Brown
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