On 15/03/17 04:23, Michael S. Tsirkin wrote: >>>> Could you help elaborate in what case will we really need that 128 bit >>>> address? >>> >>> This is how memory API works. It uses 128 bit addresses (in reality >>> it typically only needs 64 bit addresses but 128 means it can do >>> math without worrying about it too much). >> >> Yes. To be more specific, could I ask why do we need 128 bits here >> when doing "info mtree"? > > Because when you add two 64 bit addresses you sometimes get a 67 > bit one. info mtree shows some fictitious data: base/end addresses > that region would have had if it was fully visible in a flatview. > 67 bit addresses are never visible there, that is true, > but that is not the only kind of address that is not visible > in flatview yet shown by info mtree.
Note that I'm going to send a PR for the OpenBIOS fix hopefully later today which means the original test case shouldn't occur anymore. However I will manually test any patches that are submitted to verify that they work correctly for this particular case. ATB, Mark.
