Re: [Xen-devel] [RFC 02/22] xen/arm: p2m: Store in p2m_domain whether we need to clean the entry

[Julien Grall <julien.grall@xxxxxxx>]

Hi Stefano,

On 16/08/16 01:35, Stefano Stabellini wrote:
> On Thu, 28 Jul 2016, Julien Grall wrote:
> > Each entry in the page table has to table clean when the IOMMU does not
> What does it mean to "table clean" ?
I meant "has to be cleaned".

> > support coherent walk. Rather than querying every time the page table is
> > updated, it is possible to do it only once when the p2m is initialized.
> >
> > This is because this value can never change, Xen would be in big trouble
> > otherwise.
> >
> > With this change, the initialize of the IOMMU for a given domain has to
> "the initialization"
>
>
> > be done earlier in order to know whether the page table entries need to
> > be clean. It is fine to move the call earlier because it has no
> "be cleaned"
>
>
> Aside from the small imperfections in the commit message:
>
> Reviewed-by: Stefano Stabellini <sstabellini@xxxxxxxxxx>
Thank you!

Regards,

--
Julien Grall

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