linux-kernel - Re: [GIT PULL] RISC-V Updates for the 4.19 Merge Window

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Message-ID: <20180819072614.etl7izdicabsffn3@excalibur.cnev.de>
Date:   Sun, 19 Aug 2018 09:26:14 +0200
From:   Karsten Merker <merker@...ian.org>
To:     Guenter Roeck <linux@...ck-us.net>
Cc:     Palmer Dabbelt <palmer@...ive.com>,
        linux-riscv@...ts.infradead.org,
        Linus Torvalds <torvalds@...ux-foundation.org>,
        linux-kernel@...r.kernel.org
Subject: Re: [GIT PULL] RISC-V Updates for the 4.19 Merge Window

On Sat, Aug 18, 2018 at 06:37:59AM -0700, Guenter Roeck wrote:
> On Fri, Aug 17, 2018 at 01:28:11PM -0700, Palmer Dabbelt wrote:
> [ ... ]
> > 
> > This tag boots a Fedora root filesystem on QEMU's master branch for me,
> > and before this morning's rebase (from 4.18-rc8 to 4.18) it booted on
> > the HiFive Unleashed.
> 
> Do you have vmlinux embedded in bbl ?
> 
> With separate bbl and vmlinux, and the following qemu command line 
> (with qemu 3.0)
> 
> qemu-system-riscv64 -M virt -m 512M -no-reboot \
> 	-bios bbl -kernel vmlinux \
> 	-netdev user,id=net0 -device virtio-net-device,netdev=net0 \
> 	-device virtio-blk-device,drive=d0 \
> 	-drive file=rootfs.ext2,if=none,id=d0,format=raw \
> 	-append 'root=/dev/vda rw console=ttyS0,115200' \
> 	-nographic -monitor none
> 
> all I get is
> 
> rom: requested regions overlap (rom mrom.reset. free=0x000000000001cbe8, addr=0x0000000000001000)
> 
> However, the she system boots fine with the same qemu command line if I use qemu
> built from https://github.com/riscv/riscv-qemu.git, branch qemu-for-upstream.

Hello,

AFAICS the qemu patch that adds support for handling separate bbl
and kernel images, i.e.

  https://github.com/riscv/riscv-qemu/commit/6338416ecf4717197c635b5abf9c17465d2d0da0

hasn't yet made it into upstream qemu, so using the "-bios"
option for bbl generally doesn't work with (upstream) qemu 3.0.

Regards,
Karsten
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