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SubjectRe: [PATCH v4 0/5] KVM: x86: hyperv: PV IPI support for Windows guests
Vitaly Kuznetsov <> writes:

> Changes since v3 [Roman Kagan]:
> - Don't use vcpu_id in kvm_make_vcpus_request_mask to avoid dealing with
> sparse CPU masks.
> - Create get_vcpu_idx_by_vpidx() and use it in get_vcpu_by_vpidx() and
> kvm_hv_flush_tlb().
> Using hypercall for sending IPIs is faster because this allows to specify
> any number of vCPUs (even > 64 with sparse CPU set), the whole procedure
> will take only one VMEXIT.
> Same as PV TLB flush, this allows Windows guests having > 64 vCPUs to boot
> on KVM when Hyper-V extensions are enabled.



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