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xen-devel
[Xen-devel] Re: [Qemu-devel] [PATCH 06/11] exec.c: refactor cpu_physical
On Thu, 23 Jun 2011, Peter Maydell wrote:
> On 23 June 2011 18:56, Stefano Stabellini
> <stefano.stabellini@xxxxxxxxxxxxx> wrote:
> > Thanks for the detailed explanation of the problem, I think I understand
> > what I have to do to fix.
> > However I would like to have a repro of the bug before sending any
> > patches, so that I am sure that the solution works correctly.
> > However I am not very familiar with ARM emulation in Qemu: could you
> > please let me know which target I have to compile, which machine I have
> > to emulate and what other steps do I have to take in order to see this
> > issue?
>
> You'll need this not-yet-applied patch which adds cp15 perf reg support:
> http://patchwork.ozlabs.org/patch/92423/
> I've temporarily put a test kernel and initrd here:
> http://people.linaro.org/~pmaydell/linaro-20110228.tar.gz
>
> configure qemu with --target-list=arm-softmmu
> and then you can run:
>
> ./arm-softmmu/qemu-system-arm -kernel
> linaro-20110228/vmlinuz-2.6.37-1003-linaro-vexpress -initrd
> linaro-20110228/initrd.img-2.6.37-1003-linaro-vexpress -M vexpress-a9
> -cpu cortex-a9 -serial stdio -m 1024 -append 'root=/dev/mmcblk0p2 rw
> mem=1024M raid=noautodetect console=ttyAMA0,38400n8 rootwait
> vmalloc=256MB devtmpfs.mount=0'
>
> At the moment this aborts when the kernel tries to initialise the
> display; if you fix the problem it ought to display a penguin on
> the graphics window (although it will drop you into an initramfs
> prompt because you don't have a root filesystem sd card image).
Thanks, I managed to test my fix succesfully.
See the patch "qemu_ram_ptr_length: take ram_addr_t as arguments" I have
just sent.
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