On 4/26/22 01:44, AKASHI Takahiro wrote:
On Mon, Apr 25, 2022 at 10:43:44PM +0200, Heinrich Schuchardt wrote:
On 4/19/22 03:05, AKASHI Takahiro wrote:
With this patch set[1] applied, UEFI subsystem maintains a list of its
disk objects dynamically at runtime based on block device's probing.
(See "issues" and "prerequisite" below.)
[1] https://github.com/t-akashi/u-boot/tree/efi/dm_disk
For instance,
=> dm tree
Class Index Probed Driver Name
-----------------------------------------------------------
root 0 [ + ] root_driver root_driver
...
pci 0 [ + ] pci_generic_ecam |-- pcie@10000000
...
ahci 0 [ ] ahci_pci | |-- ahci_pci
scsi 0 [ ] ahci_scsi | | `-- ahci_scsi
usb 0 [ ] xhci_pci | `-- xhci_pci
...
=> efi devices
Missing RNG device for EFI_RNG_PROTOCOL
No EFI system partition
Unable to find TPMv2 device
Device Device Path
================ ====================
000000013eee88d0 /VenHw(..)
000000013ffeb798 /VenHw(..)/Uart(0,0,D,D)
000000013eeeb810 /VenHw(..)/MAC(525252525252,1)
=> scsi rescan
With the series binding block devices after initializing the UEFI
sub-system works fine. Also unbinding is reflected in the EFI devices.
But this series breaks UEFI compliance.
I don't think so.
All block devices must be probed
before booting.
This (not enumerating all the devices) is also true even before my patch.
Without this GRUB will not be able to read the boot
partition with vmlinuz and initrd.
I'm not sure what you expect here, but
is it enough to define "preboot" variables with any number of
enumerating commands, like "scsi rescan", "usb start" and so on?
I expect that boards that booted with previous versions of U-Boot using
the respective defconfig still boot. But they don't. Here is one example
(orangepi_pc_defconfig):
Found U-Boot script /boot.scr.uimg
189 bytes read in 2 ms (91.8 KiB/s)
## Executing script at 43100000
22979 bytes read in 8 ms (2.7 MiB/s)
98304 bytes read in 8 ms (11.7 MiB/s)
Booting /EFI\debian\grubarm.efi
Welcome to GRUB!
error: disk `,msdos2' not found.
grub rescue>
In U-Boot v2022.04 function efi_disk_register() ensured that all block
devices and their partitions were added as EFI handles. But that
function is missing now.
Best regards
Heinrich
# Again, this method can also be applied even without my patch.
-Takahiro Akashi
Will you provide the missing patch?
Best regards
Heinrich
