Hi, > > > btw: q35 has a fixed 1G window, max low ram addr is 0xb000000, the > > > remaining address space (0xb0000000 -> 0xc0000000) is used for > > > mmconfig. > > Is it really fixed? My understanding is it's programmed by firmware, > you can put mmconfig whereever you want.
Not really fixed, but it is a most useful configuration. You can place large bars (up to 512M) @ 0xc0000000 then, and you have a single region for your bars which makes management easy. If you place the mmconfig somewhere else it only gets more complicated. cheers, Gerd
