Re: [Xen-devel] [PATCH RFC] xen: arm: use uncached foreign mappings when building guests

[Ian Campbell <Ian.Campbell@xxxxxxxxxx>]

On Thu, 2013-12-19 at 04:26 +0000, Julien Grall wrote:
> 
> On 12/18/2013 05:28 PM, Ian Campbell wrote:
> >
> > I've tried this on arm64 and it seems ok, Julien, please can you give
> > this a go in your midway test case which exposes this issue.
> >
> 
> It's even worst :/. Crash every 2 times instead of 5 times.
> 
> Did you try to create/destroy numerous time?

I'd been testing on v8 where the failure case was 100%.

[..]
> To be sure that the guest crash "correctly", you will need to revert the 
> commit 91082d7b877cbb40de73199ba3f769d98be94215 "xen: arm: inject 
> unhandled instruction and data aborts to the guest.".
> Otherwise the data/prefetch fault will be redirected to the guest and 
> hide for the script shell.

Ah, that's why my first few attempts at a loop went so well!

I'm debugging the loop now -- looks like  I might have missed a
callpath.

Ian.


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