Re: [Xen-devel] [v7][RFC][PATCH 01/13] xen: RMRR fix

[Tim Deegan <tim@xxxxxxx>]

At 10:53 +0800 on 31 Oct (1414749238), Chen, Tiejun wrote:
> On 2014/10/31 6:15, Tim Deegan wrote:
> > Hi,
> >
> > At 15:34 +0800 on 24 Oct (1414161264), Tiejun Chen wrote:
> >> This series of patches try to reconcile those remaining problems but
> >> just post as RFC to ask for any comments to refine everything.
> >>
> >> The current whole scheme is as follows:
> >>
> >> 1. Reconcile guest mmio with RMRR in pci_setup
> >> 2. Reconcile guest RAM with RMRR in e820 table
> >>
> >> Then in theory guest wouldn't access any RMRR range.
> >>
> >> 3. Just initialize all RMRR ranges as p2m_access_n in p2m table:
> >>      gfn:mfn:p2m_access_n
> >
> > Please don't use p2m_access for this.  It will conflict with other
> > users of that interface.  Just clear the entries instead (i.e. set to
> > p2m_type_invalid).  Then you don't need to do this either:
> 
> IMO all p2m tables are initialized as invalid.

Yes, so you shouldn't need to explicitly clear them.  You just need to
check that they are already clear (or already 1:1, as we agreed
before).

Tim.


_______________________________________________
Xen-devel mailing list
Xen-devel@xxxxxxxxxxxxx
http://lists.xen.org/xen-devel