Re: [Xen-devel] [PATCH v2 3/3] xen: prevent access to HPET from Dom0

[Roger Pau Monnà <roger.pau@xxxxxxxxxx>]

El 20/01/15 a les 19.35, Andrew Cooper ha escrit:
> On 20/01/15 17:05, Roger Pau Monne wrote:
>> Prevent Dom0 from accessing HPET MMIO region by adding the HPET mfn to the
>> list of read-only memory regions.
>>
>> Signed-off-by: Roger Pau Monnà <roger.pau@xxxxxxxxxx>
>> Cc: Jan Beulich <jbeulich@xxxxxxxx>
>> Cc: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
> 
> Please introduce a command line parameter to control this, but
> defaulting to read-only is perfectly fine.
> 
> I can well imagine that there are some bits of firmware around which
> reuse the other 3/4 of the HPET page, and users with such hardware will
> need a workaround.  Perhaps a boolean parameter named "ro_hpet" ?

Sure, sorry for that because I think it was mentioned in the last
version and I've completely forgot about it.

Roger.


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