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

[BALATON Zoltan]

On Thu, 29 Nov 2018, Guenter Roeck wrote:
> On 11/29/18 4:43 PM, Philippe Mathieu-Daudé wrote:
> > Hi Zoltan,
> >
> > On 29/11/18 21:29, BALATON Zoltan wrote:
> > > Hello,
> > >
> > > I could not boot Raspbian on QEMU's raspi emulation and I'm not sure why
> > > it fails. So question is if this is supposed to work or am I doing
> > > something wrong or any clues what may be missing? I'm trying with this
> > > command line with v3.1.0-rc3:
> > >
> > > qemu-system-arm -M raspi2 -serial stdio \
> > > -kernel rpi-kernel7.img -dtb bcm2709-rpi-2-b.dtb \
> > > -append "rw earlyprintk loglevel=8 console=ttyAMA0,115200
> > > dwc_otg.lpm_enable=0 root=/dev/mmcblk0p2" \
> > > -drive file=2018-10-09-raspbian-stretch-lite.img,format=raw,if=sd
> > >
> > > Kernel starts to boot, I see raspberries on the guest screen and log
> > > output to serial:
> > >
> > > Booting Linux on physical CPU 0xf00
> > > Linux version 4.14.71-v7+ (address@hidden) (gcc version 4.9.3
> > > (crosstool-NG crosstool-ng-1.22.0-88-g8460611)) #1145 SMP Fri Sep 21
> > > 15:38:35 BST 2018
> > > CPU: ARMv7 Processor [410fc075] revision 5 (ARMv7), cr=10c5387d
> > > [...]
>
> My version (https://github.com/groeck/qemu) seems to work, using

Tried with your v3.1.0-local branch but got same results (does not find 
mmcblk0 on raspi2, nothing on raspi3) so probably it's not one of the 
patches in your tree that's missing.

> multi_v7_defconfig.

Then maybe it's your kernel config that's different? Do you have compiled 
kernels available that I could try?

Thank you,
BALATON Zoltan

> Logs from boots with qemu 3.0 and 3.1 attached.
>
> Command line:
>
> /opt/buildbot/qemu-install/v3.0/bin/qemu-system-arm \
>         -M raspi2 -kernel arch/arm/boot/zImage -no-reboot \
> 	-snapshot -drive 
> file=core-image-minimal-qemuarm.ext3,format=raw,if=sd \
> 	--append 'earlycon=pl011,0x3f201000 root=/dev/mmcblk0 rootwait rw 
> console=ttyAMA0 noreboot' \
>         -dtb arch/arm/boot/dts/bcm2836-rpi-2-b.dtb \
>         -nographic -monitor null -serial stdio
>
> Guenter