Re: [Xen-devel] Fwd: Debugging "Xen BUG at ... list.h" on ARM

[Ian Campbell <Ian.Campbell@xxxxxxxxxx>]

On Mon, 2014-04-14 at 12:53 +0100, Thomas Leonard wrote:
> On 14 April 2014 12:47, Ian Campbell <Ian.Campbell@xxxxxxxxxx> wrote:
> > On Mon, 2014-04-14 at 12:03 +0100, Thomas Leonard wrote:
> >> On 14 April 2014 11:29, Julien Grall <julien.grall@xxxxxxxxxx> wrote:
> >> > On 04/14/2014 11:10 AM, Thomas Leonard wrote:
> >> >>> Has your guest enabled caching (SCTLR.C)? This is required by the
> >> >>> hypercall ABI. See
> >> >>> http://xenbits.xen.org/docs/unstable/hypercall/arm/include,public,arch-arm.h.html#incontents_arm_abi
> >> >>
> >> >> Here's my attempt to set up the translation table and enable caching:
> >> >>
> >> >> https://github.com/talex5/xen-paratest/tree/cache-problem
> >> >
> >> > Your page table looks wrong for me. Each page table should be write-back
> >> > or write-through.
> >>
> >> Thanks - that fixed my test case!
> >
> > Excellent.
> >
> > Can you also just confirm for my peace of mind that the hypervisor crash
> > was only reproducible with a locally modified hypervisor?
> 
> The crash happens with the unmodified hypervisor too. I added the
> extra asserts only because it was crashing. Here's an example:
> 
> http://lists.xen.org/archives/html/xen-devel/2014-04/msg01702.html

OK, thanks.

Ian.




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