Re: [Qemu-devel] Commit 34b9c07a3 (microblaze: Disable stack protection from bootloader) causing qemu crash

[Michal Simek]

Hi Edgar and Guenter,

2014-02-08 Edgar E. Iglesias <address@hidden>:

On Fri, Feb 07, 2014 at 03:17:31PM -0800, Guenter Roeck wrote:
> Michal,
>
> commit 34b9c07a3 (microblaze: Disable stack protection from bootloader) results
> in the following qemu crash in 3.14-rc1.
>
> /opt/buildbot/bin/qemu-system-microblaze -M petalogix-s3adsp1800 -kernel arch/microblaze/boot/linux.bin -no-reboot -append "console=ttyUL0,115200 " -nographic
> qemu: fatal: fetching nop sequence
>
> IN: PC=20
> rmsr=4300 resr=7 rear=c0389fe8 debug=0 imm=ffffffd0 iflags=0 fsr=0
> btaken=1 btarget=c03a9f24 mode=kernel(saved=kernel) eip=512 ie=0
> r00=00000000 r01=c0389fcc r02=c0386a52 r03=000000c0
> r04=00004100 r05=9052fab4 r06=00000000 r07=90530ab4
> r08=00000000 r09=00400000 r10=00400000 r11=c03a9f24
> r12=00621000 r13=40aef0c0 r14=00000000 r15=c0000294
> r16=00000000 r17=c03a9f28 r18=00000000 r19=00000000
> r20=00000000 r21=00000000 r22=00000000 r23=00000000
> r24=00000000 r25=00000000 r26=00000000 r27=00000000
> r28=00000000 r29=00400000 r30=00000300 r31=c03932d4
>

Can you please check that these 2 registers are not available when microblaze is configured with full MMU?

Because I expect that you are testing MMU kernel but these two writes should be just nops.

Thanks,
Michal