Its "/usr/share/perl5/PVE/QemuServer.pm"
if ($winversion >= 7) {
push @$cpuFlags , 'hv_relaxed';
}
to
if ($winversion >= 7) {
push @$cpuFlags , 'hv_relaxed';
push @$cpuFlags , 'hv_synic';
push @$cpuFlags , 'hv_stimer';
}
and maybe
if ($winversion >= 6) {
push @$globalFlags...