Re: [PATCH v2 5/7] xen/arm: Use sanitize values for p2m

[Julien Grall <julien@xxxxxxx>]

On 23/08/2021 12:47, Julien Grall wrote:
> Hi Bertrand,
>
> On 23/08/2021 11:32, Bertrand Marquis wrote:
> > Replace the code in p2m trying to find a sane value for the VMID size
> > supported and the PAR to use. We are now using the boot cpuinfo as the
> > values there are sanitized during boot and the value for those
> > parameters is now the safest possible value on the system.
> >
> > On arm32, the system will panic if there are different types of core so
> > those checks were not needed anyway.
> So the assumption is that if you have the same MIDR, then you must have 
> the same features. I understand this is what Xen assumes today but I 
> never viewed that check as the truth. It is more to limit the damage on 
> most platform.
> So can you confirm whether this is something that Arm guarantees?
>
> That said, I am not against removing the code. But I would like the 
> comment to be amended if this is not a correct assumption.
s/comment/commit message/.

> Cheers,
--
Julien Grall