Re: [Xen-devel] [PATCH 1/3] xen/arm: Move p2m context save/restore in a separate function

[Ian Campbell <Ian.Campbell@xxxxxxxxxx>]

On Fri, 2014-03-28 at 12:44 +0000, Julien Grall wrote:
> Hi Ian,
> 
> On 03/21/2014 09:19 AM, Ian Campbell wrote:
> > On Thu, 2014-03-20 at 17:59 +0000, Julien Grall wrote:
> > 
> >>> Are all of these isb()s necessary?  I guess this is only code motion,
> >>> so in any case, Acked-by: Tim Deegan <tim@xxxxxxx> (for the whole series)
> >>> but it seems like at least the one after the VTTBR write could go?
> >>
> >> Thanks for the review.
> >>
> >> Yes, the isb() right after VTBBR can be removed.
> > 
> > Actually I think there are probably loads of barriers in the context
> > switch path which can be dropped in favour of a final one at the end,
> > not all that much stuff there relies on stuff which is reloaded before
> > it (of course we should keep barriers for cases where there is a
> > dependence).
> 
> Sorry for the late answer. Shall I rework this patch and remove the
> duplicated isb and HCR_VM?

If you need to rebase/resend for some other reason then please fold this
in. If not then please send a follow up patch.

I'm not sure why I didn't commit this series already. I think it must
have fallen through the cracks, sorry.

Ian.


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