Re: [PATCH RFC 02/39] KVM: x86/xen: intercept xen hypercalls if enabled

[Paolo Bonzini]

On 22/02/19 01:30, Sean Christopherson wrote:
> On Thu, Feb 21, 2019 at 08:56:06PM +0000, Joao Martins wrote:
>> The Xen addition follows the same structure as Hyper-V in kvm (what you suggest
>> here is probably applicable for both). i.e. there's some Xen specific routines
>> for vm/vcpu init/teardown, and timer handling. We would have to place some of
>> those functions into a struct that gets registered at modinit.
> 
> Huh.  I never really hooked at the Hyper-V code, for some reason I always
> assumed it was only related to running KVM on Hyper-V.  I agree that this
> extra hurdle only makes sense if it's also applied to Hyper-V.

The difference is that Hyper-V support is more or less mandatory to run
recent Windows guests.  Having a config symbol would be enough for me.

Paolo