On 30/12/11 05:21, Michael S. Tsirkin wrote:
On Thu, Dec 29, 2011 at 06:41:36PM +1300, Alexey Korolev wrote:
Can't figure this out. What does this do?
Bios will panic if it founds prefmem BARs in both 32bit and 64bit areas.
That's not good, it's a legal configuration.
To be more complete : Bios will panic if it founds prefmem BARs in both 32bit and 64bit areas on the same secondary Bus. I agree about that this limitation is too strict at the moment.
To answer if it is a legal or not we need to have a look how real BIOS would behave in a such scenario. Unfortunately I have no chance to have this configuration on hand. If you have (may have) this I would appreciate if you let us know how the Bios will behave?