Re: [Xen-devel] <summary-1> (v2) Design proposal for RMRR fix

[Ian Campbell <Ian.Campbell@xxxxxxxxxx>]

On Mon, 2015-01-12 at 13:53 +0000, Tian, Kevin wrote:
> > From: Ian Campbell [mailto:Ian.Campbell@xxxxxxxxxx]
> > Sent: Monday, January 12, 2015 9:42 PM
> > 
> > On Fri, 2015-01-09 at 06:57 +0000, Tian, Kevin wrote:
> > > 3) report-sel vs. report-all
> > 
> > One thing I'm not clear on is whether you are suggesting to reserve RMRR
> > (either -all or -sel) for every domain by default, or whether the guest
> > CFG will need to explicitly opt-in, IOW is there a 3rd report-none
> > option which is the default unless otherwise requested (e.g. by
> > e820_host=1, or some other new option)?
> 
> only when a device is assigned (or potentially prepare for hotplug usage),

How is this triggered though? Via pci= non-empty in the guest CFG?

This sounds like it should behave similarly (in terms of when it is
enabled, not necessarily in functionality) to the e820_host boolean,
which is set by default if the pci= list is not empty, or can be
overridden if the host admin anticipates doing hotplug.

Ian.


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