message: detect_from_hypervisor doesn't work during the tests => disable it
diff: @@ -274,6 +274,12 @@ impl CpuFrequency {
  Err(())
  }
  + #[cfg(test)]
  + unsafe fn detect_from_hypervisor(&mut self) -> Result<(), ()> {
  + Err(())
  + }
  +
  + #[cfg(not(test))]
  unsafe fn detect_from_hypervisor(&mut self) -> Result<(), ()> {
  let cpu_freq = ptr::read_volatile(&KERNEL_HEADER.cpu_freq);
  if cpu_freq > 0 {
  