Re: Could we document exact steps for loongson3-virt in the manual?

[Jiaxun Yang]

On Tue, Apr 6, 2021, at 9:06 PM, Alex Bennée wrote:
> Hi,
> 
> I was trying to bootstrap a Loongson3 Debian image but ran into some
> roadblocks. Philippe pointed me at:
> 
>   https://www.mail-archive.com/qemu-devel@nongnu.org/msg768848.html
> 
> which gives a bit of detail but elides over details such as how to
> handle block devices. AFAICT it should support virtio-blk although maybe
> Debian bullseye doesn't support the target, it's hard to say:
> 
>   ./qemu-system-mips64el -M loongson3-virt -m 4096 -nographic -blockdev 
> driver=raw,node-name=hd0,discard=unmap,file.driver=host_device,file.filename=/dev/zvol/hackpool-0/debian-bullseye-mips64le
>  -device virtio-blk,drive=hd0 -kernel ./vmlinuz-5.9.0-4-loongson-3 -initrd 
> initrd.gz -append "root=/dev/sda1 console=tty0 nokaslr"

missing console=ttyS0,115200 in cmdline.


> 
> Gets as far as:
> 
> [    0.008641] printk: console [tty0] enabled
> [    0.009507] printk: bootconsole [early0] disabled
> 
> and then just goes silent. It would be nice if we could add enough
> detail to the appropriate target-mips.rst to:
> 
>  - give guidance on the best model to use for general purpose distros
>  - describe a common command line for such
>  - detail bootstraping a modern kernel
> 
> In the ARM section there is a nice "Choosing a board model" which
> discusses what you want (probably "virt") and then we have varying
> levels of detail for the various myriad zoo of ARM machines that are
> emulated. I recently added sections to the versatile and vexpress
> sections after going through similar pain trying to get those up and
> running.

I’ll take a look.

Thanks!


> 
> -- 
> Alex Bennée
>

-- 
- Jiaxun