At 22:07 +0000 on 04 Jan (1294178829), Joe Epstein wrote:
> * Introduces access types for each page, giving independent read, write, and
> execute permissions for each page. The permissions are restrictive from
> what the page type gives: for example, a p2m_type_ro page with an access of
> p2m_access_rw would have read-only permissions in total, as p2m_type_ro
> removed write access and p2m_access_rw removed execute access.
>
> * Implements the access flag storage for EPT, moving some bits from P2M type,
> which had 10 bits of storage, to the four bits for access.
>
> * Access flags are stored according to a loose consistency contract, where
> pages can be reset to the default access permissions at any time. Right
> now, that happens on page type changes, where one would want to reevaluate
> whether permissions make sense for that page as they are anyway.
>
> Signed-off-by: Joe Epstein <jepstein98@xxxxxxxxx>
I won't apply this until the rest of the series is ready, but:
Acked-by: Tim Deegan <Tim.Deegan@xxxxxxxxxx>
Cheers,
Tim.
--
Tim Deegan <Tim.Deegan@xxxxxxxxxx>
Principal Software Engineer, Xen Platform Team
Citrix Systems UK Ltd. (Company #02937203, SL9 0BG)
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