Re: [Qemu-devel] Booting Raspbian on RPi emulation

[BALATON Zoltan]

On Tue, 18 Dec 2018, Ben Hekster via Qemu-devel wrote:
> I had the exact same issue; for me it was just the addition of Günther's 
> "rootwait" option that resolved it, so:
>
> $ qemu-system-arm \
>         -m 256m \
>         -M raspi2 \
>         -cpu cortex-a7 \
>         -append "console=ttyAMA0,115200 root=/dev/mmcblk0p2 rootwait rw" \
>         -dtb bcm2709-rpi-2-b.dtb \
>         -drive file=2018-11-13-raspbian-stretch-lite.img,if=sd,format=raw \
>         -kernel kernel7.img \
>         -nographic
>
> Did it for me using stock QEMU 3.1.0.  (I need "-nographic" because the OS X 
> port crashes without it)

Indeed. Thanks. It also boots with the raspbian kernel7.img after adding 
this option, so likely the cause of this was that mmc wasn't detected fast 
enough and without rootwait it tried to mount it without waiting before 
it was available.

It does not crash on OS X for me even without -nographic but I'm not yet 
on Mojave. I've read there may be problems on latest macOS and seen 
patches to fix that. Here's the discussion:

https://bugs.launchpad.net/qemu/+bug/1802684

Launchpad seems to have eaten the RFC patch URL in the last comment but I 
think it's this one:

http://patchew.org/QEMU/address@hidden/

Maybe you can test and report back if this fixes your problem so it can be 
merged if it helps.

Thank you,
BALATON Zoltan