Re: [Xen-devel] [RFC 21/22] xen/arm: p2m: Re-implement p2m_set_mem_access using p2m_{set, get}_entry

[Julien Grall <julien.grall@xxxxxxx>]

Hi Ravzan,

On 06/09/2016 20:16, Razvan Cojocaru wrote:
> On 09/06/16 22:06, Stefano Stabellini wrote:
> > On Thu, 28 Jul 2016, Julien Grall wrote:
> > > > The function p2m_set_mem_access can be re-implemented using the generic
> > > > functions p2m_get_entry and __p2m_set_entry.
> > > >
> > > > Note that because of the implementation of p2m_get_entry, a TLB
> > > > invalidation instruction will be issued for each 4KB page. Therefore the
> > > > performance of memaccess will be impacted, however the function is now
> > > > safe on all the processors.
> > > >
> > > > Also the function apply_p2m_changes is dropped completely as it is not
> > > > unused anymore.
> > > >
> > > > Signed-off-by: Julien Grall <julien.grall@xxxxxxx>
> > > > Cc: Razvan Cojocaru <rcojocaru@xxxxxxxxxxxxxxx>
> > > > Cc: Tamas K Lengyel <tamas@xxxxxxxxxxxxx>
> > Reviewed-by: Stefano Stabellini <sstabellini@xxxxxxxxxx>
> How far is this patch from landing into staging? Considering the recent
> discussion about the patch I'm working on, this would certainly impact
> the upcoming ARM part of it.
I expect this to be in Xen 4.8. I also realized that without this patch 
it will be harder to implement the ARM side.
Given that I would be fine to write the ARM side once this series is out 
and your patch ready.
Regards,

--
Julien Grall

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