Jeremy Fitzhardinge wrote: > Nakajima, Jun wrote: > > Today, 3 CPUID leaves starting from 0x4000_0000 are defined in a generic > > fashion (hypervisor detection, version, and hypercall page), and those > > are the ones used by Xen today. We should extend those leaves (e.g. > > starting from 0x4000_0003) for the vmm-independent features as well. > > > > If Xen needs additional Xen-specific features, we need to allocate some > > leaves for those (e.g. 0x4000_1000) > > But the signature is "XenVMMXenVMM", which isn't very generic. If we're > presenting a generic interface, it needs to have a generic signature, > otherwise guests will need to have a list of all hypervisor signatures > supporting their interface. Since 0x40000000 has already been > established as the base leaf of the hypervisor-specific interfaces, the > generic interface will have to be elsewhere.
The hypervisor detection machanism is generic, and the signature returned is implentation specific. Having a list of all hypervisor signatures sounds fine to me as we are detecting vendor-specific processor(s) in the native. And I don't expect the list is large. > > J Jun --- Intel Open Source Technology Center - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
