Re: [Xen-devel] [PATCH for 4.5 v8 1/1] Add mmio_hole

[Ian Campbell <Ian.Campbell@xxxxxxxxxx>]

On Wed, 2014-10-22 at 09:08 -0400, Don Slutz wrote:
> On 10/22/14 07:21, Ian Campbell wrote:
> > On Tue, 2014-10-21 at 08:42 -0400, Don Slutz wrote:
> >> If you add enough PCI devices then all mmio may not fit below 4G
> >> which may not be the layout the user wanted. This allows you to
> >> increase the below 4G address space that PCI devices can use and
> >> therefore in more cases not have any mmio that is above 4G.
> >>
> >> There are real PCI cards that do not support mmio over 4G, so if you
> >> want to emulate them precisely, you may also need to increase the
> >> space below 4G for them. There are drivers for these cards that also
> >> do not work if they have their mmio space mapped above 4G.
> >>
> >> This allows growing the MMIO hole to the size needed.
> >>
> >> This may help with using pci passthru and HVM.
> >>
> >> In the tools this is named mmio_hole_memkb.
> >>
> >> Signed-off-by: Don Slutz <dslutz@xxxxxxxxxxx>
> > For the tools side: Acked-by: Ian Campbell <ian.campbell@xxxxxxxxxx>
> >
> > Has this had a release exception? Or acks for the hvmloader side of
> > things?
> >
> 
> On Tue, 14 Oct 2014 11:56:22 -0400, Konrad Rzeszutek Wilk said:
> 
> > I am OK with this patch going in Xen 4.5 (as a release-manager)
> > but it can't go anywhere unless there is an Ack/Review.
> 
> 
> On Mon, 20 Oct 2014 15:10:25 +0100, George Dunlap said:
> 
> > I haven't done a full review, but all of my previous concerns have
> > been addressed:
> 
> > Acked-by: George Dunlap <george.dunlap@xxxxxxxxxxxxx>

Thanks, applied. I had to fix a warning due to the use of PRIu64 to
print an unsigned long (printf format error on x86_64 and arm32).

I changed the title to "x86: hvm: Allow configuration of the size of the
mmio_hole." since "Add mmio_hole".


Ian.




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