On 07/24/13 08:01, Michael S. Tsirkin wrote: > It turns out that some 32 bit windows guests crash > if 64 bit PCI hole size is >2G.
Ah, *that* is the reason for winxp crashing with a 64bit hole. Current seabios uses a slightly different approach: the 64bit hole is present only in case it is actually used to map bars there, and seabios tries to fit everything into the 32bit hole first. > Limit it to 2G for piix and q35 by default, > add properties to let management override the hole size. > > Examples: > -global i440FX-pcihost.pci_hole64_size=137438953472 Do we really want specify this in bytes? Using megabytes or gigabytes instead looks more sane to me. cheers, Gerd
