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

[Ian Campbell <Ian.Campbell@xxxxxxxxxx>]

On Mon, 2014-04-14 at 11:29 +0100, Julien Grall 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.

I also don't think it's strictly speaking necessary to enable paging to
enable the caches (although I appreciate you might want to do so for
reasons unrelated to using HYPERVISOR_console_io)

Ian.


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