On 05/07/2016 12:06, Michael S. Tsirkin wrote: > > -m 2G,slots=16,maxmem=2T > > > > On a host with a 39bit physaddress limit do you error > > on that or not? I think oVirt is currently doing something > > similar to that, but I'm trying to get confirmation. > > That would only be a problem since pci is allocated above > maxmem so 64 bit pci addresses aren't accessible. > With my proposal we can actually force firmware to avoid > using 64 bit memory for that config. > Will work better than today.
So you would remove completely the 64-bit _CRS in this case? How do you handle migration in the above scenario from say 46bit host to 39bit host, where the firmware has mapped (while running on the source) a 64-bit BAR above the destination's maximum physical address? Thanks, Paolo
