From mboxrd@z Thu Jan  1 00:00:00 1970
From: Ian Campbell <ian.campbell@citrix.com>
Subject: Re: [PATCH V14 5/7] xen/arm: Instruction prefetch abort
 (X) mem_access event handling
Date: Mon, 30 Mar 2015 16:24:02 +0100
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To: Tamas K Lengyel <tklengyel@sec.in.tum.de>
Cc: "wei.liu2@citrix.com" <wei.liu2@citrix.com>, Stefano Stabellini <stefano.stabellini@eu.citrix.com>, Ian Jackson <ian.jackson@eu.citrix.com>, Julien Grall <julien.grall@linaro.org>, Tim Deegan <tim@xen.org>, Xen-devel <xen-devel@lists.xen.org>, Stefano Stabellini <stefano.stabellini@citrix.com>, Jan Beulich <jbeulich@suse.com>, Keir Fraser <keir@xen.org>
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On Mon, 2015-03-30 at 17:14 +0200, Tamas K Lengyel wrote:

>         According to ARMv8 ARM HPFAR is valid for any of these:
>               * A Translation or Access Flag fault on a stage 2 translation.
>               * A stage 2 Address Size fault.
>               * A fault on the stage 2 translation of an address accessed in a
>                 stage 1 translation table walk.
>         
>         I think what you are (correctly) saying is that it omits "a permission
>         fault on a stage 2 translation", which is one of the cases which can
>         occur under xenaccess. Which is shame :-(
> 
> Hm, what I recall is that it is valid for permission faults as well,
> but only and exclusively during s1ptw.

Right, which is the third bullet I quoted. The issue I was referring to
was the lack of permission faults being mentioned in the first bullet (!
s1ptw case).

Ian.