Re: [Qemu-devel] [PPC64] P5020DS: Booting from img possible (-drive)?

[Greg Kurz <groug@kaod.org>]

On Fri, 18 May 2018 12:30:44 +0200
Christian Zigotzky <chzigotzky@xenosoft.de> wrote:

> On 18 May 2018 at 11:24PM, Thomas Huth wrote:
> > On 18.05.2018 11:06, Christian Zigotzky wrote:  
> >> It works on my AmigaOne X5000 (P5020 board with 2x e5500 cores).
> >>
> >> Screenshots: https://plus.google.com/115515624056477014971  
> > Interesting ... but you still use your own kernel, and not the stock
> > Ubuntu kernel, right? That would explain how this can work...
> >
> > Anyway, having a quick look at the sources, it seems to me that the
> > ppce500 / mpc8544ds machines in QEMU do not support any mass storage
> > controllor by default, so you got to specify the interface type.
> >
> > For example:
> >
> >   -drive if=virtio,file=...
> >
> > or:
> >
> >   -device virtio-scsi -drive if=none,idÁ,file=... \
> >   -device scsi-cd,driveÁ
> >
> > Same for the graphics card, there does not seem to be support for a
> > default here, so try to specify it like this:
> >
> >   -device VGA
> >
> > or:
> >
> >   -device virtio-vga
> >
> >   HTH,
> >    Thomas
> >  
> Hello Thomas,
> 
> Thanks for your reply.
> 
> ./qemu-system-ppc64 -M ppce500 -cpu e5500 -m 2048 -nographic -kernel 
> /home/christian/Downloads/vmlinux-4.17-rc5-AmigaOne_X1000_X5000/X5000/uImage-4.17 
> -machine dt_compatible=fsl,,P5020DS -drive 
> if=virtio,file=/home/christian/Dokumente/ubuntu_MATE_16.04.3_LTS_PowerPC_QEMU/ubuntu_MATE_16.04_PowerPC.img 
> -append "root=/dev/sda3"
> 
> Output:
> 
> [    0.880961] VFS: Cannot open root device "sda3" or 
> unknown-block(0,0): error -6

if=virtio translates to -device virtio-blk-pci AFAIK, in which case you should
pass "root=/dev/vda3".

And of course your kernel should be built with virtio support.

> [    0.881150] Please append a correct "root=" boot option; here are the 
> available partitions:
> [    0.881446] 0100          131072 ram0
> [    0.881478]  (driver?)
> [    0.881709] 0101          131072 ram1
> [    0.881715]  (driver?)
> [    0.881875] 0102          131072 ram2
> [    0.881879]  (driver?)
> [    0.882033] 0103          131072 ram3
> [    0.882037]  (driver?)
> [    0.882189] 0104          131072 ram4
> [    0.882193]  (driver?)
> [    0.882347] 0105          131072 ram5
> [    0.882350]  (driver?)
> [    0.882503] 0106          131072 ram6
> [    0.882507]  (driver?)
> [    0.882700] 0107          131072 ram7
> [    0.882705]  (driver?)
> [    0.882862] 0108          131072 ram8
> [    0.882866]  (driver?)
> [    0.883018] 0109          131072 ram9
> [    0.883021]  (driver?)
> [    0.883174] 010a          131072 ram10
> [    0.883178]  (driver?)
> [    0.883330] 010b          131072 ram11
> [    0.883333]  (driver?)
> [    0.883487] 010c          131072 ram12
> [    0.883490]  (driver?)
> [    0.883694] 010d          131072 ram13
> [    0.883699]  (driver?)
> [    0.883858] 010e          131072 ram14
> [    0.883863]  (driver?)
> [    0.884020] 010f          131072 ram15
> [    0.884024]  (driver?)
> [    0.884265] Kernel panic - not syncing: VFS: Unable to mount root fs 
> on unknown-block(0,0)
> [    0.884883] Rebooting in 180 seconds..
> 
> ./qemu-system-ppc64 -M ppce500 -cpu e5500 -m 2048 -nographic -kernel 
> /home/christian/Downloads/vmlinux-4.17-rc5-AmigaOne_X1000_X5000/X5000/uImage-4.17 
> -machine dt_compatible=fsl,,P5020DS -device virtio-scsi -drive 
> if=none,idÁ,file=/home/christian/Dokumente/ubuntu_MATE_16.04.3_LTS_PowerPC_QEMU/ubuntu_MATE_16.04_PowerPC.img 
> -device scsi-cd,driveÁ -append "root=/dev/sda3"
> 
> Unfortunately without any success. (same errors like before)
> 
> Boot with U-Boot:
> 
> ./qemu-system-ppc64 -M ppce500 -cpu e5500 -m 2048 -nographic -bios 
> /home/christian/Downloads/u-boot -machine dt_compatible=fsl,,P5020DS 
> -device virtio-scsi -drive 
> if=none,idÁ,file=/home/christian/Dokumente/ubuntu_MATE_16.04.3_LTS_PowerPC_QEMU/ubuntu_MATE_16.04_PowerPC.img 
> -device scsi-cd,driveÁ
> 
> Output:
> 
> U-Boot 2017.09-00322-g1f6049e (Sep 25 2017 - 20:50:48 +0200)
> 
> CPU:   Unknown, Version: 0.0, (0x00000000)
> Core:  e5500, Version: 2.0, (0x80240020)
> Clock Configuration:
>         CPU0:400  MHz,
>         CCB:400  MHz,
>         DDR:200  MHz (400 MT/s data rate), LBC: unknown (LCRR[CLKDIV] = 
> 0x00)
> L1:    D-cache 32 KiB enabled
>         I-cache 32 KiB enabled
> DRAM:  2 GiB
> L2:    disabled
> Using default environment
> 
> 
> PCI: base address e0008000
>    00:01.0     - 1af4:1000 - Network controller
>    00:02.0     - 1af4:1004 - Mass storage controller
> PCI1: Bus 00 - 00
> 
> In:    serial
> Out:   serial
> Err:   serial
> Net:   No ethernet found.
> Hit any key to stop autoboot:  0
> =>  
> 
> Any other hints?
> 
> Thanks,
> Christian
> 
> 
> 
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