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Re: [PATCH 0/2] Implement a grub loader for RISC-V LINUX

From: Alexander Graf
Subject: Re: [PATCH 0/2] Implement a grub loader for RISC-V LINUX
Date: Thu, 16 Jan 2020 13:06:33 +0100
User-agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.14; rv:68.0) Gecko/20100101 Thunderbird/68.3.1

Hi Chester,

On 16.01.20 11:21, Chester Lin wrote:
Implement an initial version of riscv loader and related commands to load
and run linux kernel and initrd on RISC-V. I tested this series based on
the following configuration:

   - QEMU 4.2.50 (machine: virt)
   - OpenSBI v0.5-51
   - U-Boot 2020.01-rc5
   - grub 2.04
   - linux-kernel v5.4
   - openSUSE-Tumbleweed-20191103

Thanks a lot for tackling this problem - it's been on the back burner for way too long :). Unfortunately this patch set loads grub via UEFI, but then does not execute Linux using the UEFI protocol. While that's a nice hack for starters, it severely limits the extensibility of the boot flow going forward.

IIRC either Anup or Atish wanted to work on a UEFI boot stub for Linux. We could then just unify the ARM and RISC-V UEFI boot paths in grub and use that common code to run Linux via the UEFI stub.



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