pub fn create_pvclock_device(
protection_type: ProtectionType,
jail_config: Option<&JailConfig>,
tsc_frequency: u64,
suspend_tube: Tube,
) -> Result<VirtioDeviceStub>pub fn create_pvclock_device(
protection_type: ProtectionType,
jail_config: Option<&JailConfig>,
tsc_frequency: u64,
suspend_tube: Tube,
) -> Result<VirtioDeviceStub>