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SubjectRe: [kvm-devel] [PATCH] Refactor hypercall infrastructure
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.

J
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