Re: Userspace MSR handling

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On 05/24/09 14:07, Avi Kivity wrote:
I agree however that the Xen hypercall page protocol has no business in
kvm.ko. But can't we implement it in emu? Xenner conveniently places a
ring 0 stub in the guest, we could trap the MSR there and emulate it
entirely in the guest.

No. The case where handling the msr writes is needed is the pv-on-hvm driver support. For pv kernels it could be handled by emu if it would be needed, but pv kernels don't need the msr stuff in the first place. There should be a longish mail about that in the list archive ...

cheers,
  Gerd
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