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

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 20.01.15 at 18:05, <roger.pau@xxxxxxxxxx> 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>
> ---
> Changes since v1:
>  - Instead of completely blocking access to the HPET mfn, set it as
>    read-only.

I'd actually prefer if you kept the ACPI based complete blocking, and
use the r/o variant only if ACPI didn't allow you to block access entirely.

Jan

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