Messages in this thread | | | Date | Fri, 14 Sep 2007 16:00:21 -0700 | From | Jeremy Fitzhardinge <> | Subject | Re: [kvm-devel] [PATCH] Refactor hypercall infrastructure |
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Nakajima, Jun wrote: >>> one. Start the kvm leaves at 0x40001000 or something? >>> >>> >> Yeah, that works with me. >> > > To me this is the beginning of fragmentation. Why do we need different > and VMM-specific Linux paravirtualization for hardware-assisted > virtualization? That would not be good for Linux. >
On the contrary. Xen already has a hypercall interface, and we need to keep supporting it. If we were to also support a vmm-independent interface (aka "kvm interface"), then we need to be able to do that in parallel. If we have a cpuid leaf clash, then its impossible to do so; if we define the new interface to be disjoint from other current users of cpuid, then we can support them concurrently.
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