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

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 20.01.15 at 19:35, <andrew.cooper3@xxxxxxxxxx> wrote:
> 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" ?

For the "no-" prefix to look reasonable with it, "ro-hpet" please.

Jan

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