Re: [Xen-devel] [PATCH V14 5/7] xen/arm: Instruction prefetch abort (X) mem_access event handling

[Ian Campbell <ian.campbell@xxxxxxxxxx>]

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.



_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxx
http://lists.xen.org/xen-devel