Function kvm::set_user_memory_region

pub(crate) unsafe fn set_user_memory_region<F: AsRawDescriptor>(
    fd: &F,
    slot: u32,
    read_only: bool,
    log_dirty_pages: bool,
    guest_addr: u64,
    memory_size: u64,
    userspace_addr: *mut u8
) -> Result<()>