>>> On 14.01.15 at 13:29, <george.dun...@eu.citrix.com> wrote: > On 01/14/2015 08:06 AM, Tian, Kevin wrote: >> We discussed earlier there are two reasons that some conflicts may not be >> avoided: >> - RMRRs conflicting with guest BIOS in <1MB area, as an example of >> hard conflicts >> - RMRRs conflicting with lowmem which is low enough then avoiding it >> will either break lowmem or make lowmem too low to impact guest (just >> an option being discussed) > > So here you're assuming that we're going to keep the lowmem / mmio hole > / himem thing. Is that necessary? I was assuming that if we have > arbitrary RMRRs, that we would just have to accept that we'd need to be > able to punch an arbitrary number of holes in the p2m space.
On the basis that the host would have placed the RMRRs in its MMIO hole, I think I agree with Kevin that if possible we should stick with the simpler lowmem / mmio-hole / highmem model if possible. If we really find this too limiting, switching to the more fine grained model later on will still be possible. Jan _______________________________________________ Xen-devel mailing list Xen-devel@lists.xen.org http://lists.xen.org/xen-devel
