Re: [RFC 32/33] KVM: x86: hyper-v: Implement HVCALL_TRANSLATE_VIRTUAL_ADDRESS

[Alexander Graf]

On 08.11.23 12:18, Nicolas Saenz Julienne wrote:
> Introduce HVCALL_TRANSLATE_VIRTUAL_ADDRESS, the hypercall receives a
> GVA, generally from a less privileged VTL, and returns the GPA backing
> it. The GVA -> GPA conversion is done by walking the target VTL's vCPU
> MMU.
>
> NOTE: The hypercall implementation is incomplete and only shared for
> completion. Additionally we'd like to move the VTL aware parts to
> user-space.


Yes, please :). We should handle the complete hypercall in user space if 
possible. If you're afraid that gva -> gpa conversion may run out of 
sync between a user space and the kvm implementations, let's introduce 
an ioctl that allows you to perform that conversion.


Alex




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