[Bug 1998513] [NEW] SRU provide RISCV_EFI_BOOT_PROTOCOL in Focal

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[ Impact ]

Booting a current kernel (5.19) with U-Boot via UEFI fails in Focal
because the RISCV_EFI_BOOT_PROTOCOL is not provided.

The RISCV_EFI_BOOT_PROTOCOL is used to indicate the boot hart ID. In
previous releases of the kernel the boot hart ID was read from the
/chosen/boot-hartid property in the device-tree.

Add the missing protocol.

U-Boot in Focal cannot add the boot-hartid property if the the device-
tree does not contain a chosen node. This might lead to failure to boot
a 5.15 kernel. Add a patch fixing this.

[ Test Plan ]

 * Try booting the SiFive HiFive Unmatched board and QEMU using the
preinstalled server image for Focal.

 * Use the Kinetic server install image to install Ubuntu on the SiFive
HiFive Unmatched board and on QEMU and try to boot with the SRUed
U-Boot.

[ Where problems could occur ]

 * The two applied patches affect only RISC-V (if there is no syntax
error).

 * Booting the Focal Fossa 5.15 kernel would fail if the /chosen/boot-
hartid were not provided.

[ Other Info ]
 
n/a

** Affects: u-boot (Ubuntu)
     Importance: Undecided
     Assignee: Heinrich Schuchardt (xypron)
         Status: In Progress


** Tags: fr-3076 patch
-- 
SRU provide RISCV_EFI_BOOT_PROTOCOL in Focal
https://bugs.launchpad.net/bugs/1998513
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