[PATCH RFC/RFT 0/3] Add grub loader support for RISC-V Linux

[Atish Patra]

This series adds grub loader support for RISC-V Linux. Thanks to the awesome
initial RISC-V support added by Alex, we just needed a loader for RISC-V to
load and execute Linux using UEFI protocol.

Fortunately, ARM64 Linux loader is written in an architecture agnostic manner
so thatgeneric RISC-V can easily reuse the loader code. Thus, the first patch
just moves the ARM64 code to common code. I have compile tested for
ARM64/ARM32. Even though it doesn't introduce any functional change
for ARM/ARM64, any real testing will be helpful.

I have tested this series for RISC-V on both Qemu and HiFive Unleashed.
Here are the dependencies of other opensource projects.

1. OpenSBI v0.7
2. U-boot master (Head: a5f9b8a8b592 Merge 
https://gitlab.denx.de/u-boot/custodians/u-boot-riscv)
3. Linux kernel (efi-next + top 4 RISC-V patches from riscv-efi-for-v5.8)
   Linux kernel tree can be found here as well.
   https://github.com/atishp04/linux/pull/new/uefi_riscv_pr
 

Atish Patra (3):
loader: Move arm64 linux loader to common code
RISC-V: Update image header
RISC-V: Use common linux loader

grub-core/Makefile.core.def             |  8 ++--
grub-core/loader/{arm64 => efi}/linux.c |  2 +-
grub-core/loader/riscv/linux.c          | 59 -------------------------
include/grub/arm/linux.h                |  2 +-
include/grub/arm64/linux.h              |  2 +-
include/grub/riscv32/linux.h            | 16 ++++---
include/grub/riscv64/linux.h            | 16 ++++---
7 files changed, 25 insertions(+), 80 deletions(-)
rename grub-core/loader/{arm64 => efi}/linux.c (99%)
delete mode 100644 grub-core/loader/riscv/linux.c

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2.25.1