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?
# Again, this method can also be applied even without my patch.
-Takahiro Akashi
Will you provide the missing patch?
Best regards
Heinrich