i386/kvm: add support for Hyper-V TLB flush
Add support for Hyper-V TLB flush which recently got added to KVM. Just like regular Hyper-V we announce HV_EX_PROCESSOR_MASKS_RECOMMENDED regardless of how many vCPUs we have. Windows is 'smart' and uses less expensive non-EX Hypercall whenever possible (when it wants to flush TLB for all vCPUs or the maximum vCPU index in the vCPU set requires flushing is less than 64). Signed-off-by: NVitaly Kuznetsov <vkuznets@redhat.com> Message-Id: <20180610184927.19309-1-vkuznets@redhat.com> Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
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