OS: uos 20 龙芯版
下载龙芯或龙梦提供的4.19源码或从内核官网下载最新kernel(验证过5.9.13)
龙芯源码下载地址：http://ftp.loongnix.org/kernel/linux-4.19.90/Linux-4.19.90-5.tar.gz
龙芯源码下载地址：https://mirrors.tuna.tsinghua.edu.cn/bjlx/pool/main/l/linux-4.19.0-loongson-3/linux-4.19.0-loongson-3_4.19.124-lemote.orig.tar.xz
内核官网：https://www.kernel.org/

下面以龙芯的源码为例，龙梦的源码步骤也是一致

1. 解压编译

   $ tar xf Linux-4.19.90-5.tar.gz
   $ cd Linux-4.19.90-5
   $ make loongson3_defconfig
   $ make -j4
   $ make install INSTALL_PATH=./_install
   $ make modules_install INSTALL_MOD_PATH=./_install
   

2. 更换内核

   $ cd _install/
   $ sudo cp vmlinuz-4.19.90-5 /boot/
   
   $ cd lib/modules
   $ sudo cp 4.19.90-5/ -rf /lib/modules
   
   $ sudo su
   //制作initrd文件，4.19.90-5 为当前编译的内核号mkinitramfs会根据这个名去/lib/moudules/4.19.90-5 下打包内核模块文件
   # mkinitramfs 4.19.90-5 -o /boot/initrd.img-4.19.90-5
   cryptsetup: WARNING: The initramfs image may not contain cryptsetup binaries 
       nor crypto modules. If that's on purpose, you may want to uninstall the 
       'cryptsetup-initramfs' package in order to disable the cryptsetup initramfs 
       integration and avoid this warning.
   setupcon is missing. Please install the 'console-setup' package.
   W: plymouth: The plugin label.so is missing, the selected theme might not work as expected.
   W: plymouth: You might want to install the plymouth-themes package to fix this.
   I: The initramfs will attempt to resume from /dev/sda7
   I: (UUID=5c2ea164-88f0-40a1-899c-261d3f5fd4cc)
   I: Set the RESUME variable to override this.
   //更新grub.cfg 
   # grub-mkconfig -o /boot/efi/EFI/BOOT/grub.cfg 
   Generating grub configuration file ...
   Found linux image: /boot/vmlinuz-4.19.90-5
   Found initrd image: /boot/initrd.img-4.19.90-5
   Found linux image: /boot/vmlinuz-4.19.0-loongson-3-desktop
   Found initrd image: /boot/initrd.img-4.19.0-loongson-3-desktop
   Found initrd image: /boot/deepin-ab-recovery/initrd.img-4.19.0-loongson-3-desktop
   Found recovery image: /recovery/doppel/vmlinuz-4.19.90
   Found initrd image: /recovery/doppel/initrd.img-4.19.90
   Skipped UnionTech OS 20  on /dev/sda4 by user request.
   done
   

3. 重启试用

   $ uname -a
   Linux loongson-gd-PC 4.19.90-5 #1 SMP PREEMPT Tue Dec 8 12:03:18 CST 2020 mips64 GNU/Linux
   $ lscpu
   Architecture:        mips64
   Byte Order:          Little Endian
   CPU(s):              4
   On-line CPU(s) list: 0-3
   Thread(s) per core:  1
   Core(s) per socket:  4
   Socket(s):           1
   NUMA node(s):        1
   Model name:          Loongson-3A R4 (Loongson-3A4000)
   BogoMIPS:            3594.02
   L1d cache:           64K
   L1i cache:           64K
   L2 cache:            256K
   L3 cache:            2048K
   NUMA node0 CPU(s):   0-3
   
   // 内核官网下载最新kernel 5.9.13
   $ uname -a
   Linux loongson-gd-PC 5.9.13 #1 SMP PREEMPT Fri Dec 11 11:25:31 CST 2020 mips64 GNU/Linux
   $ neofetch 
           #####           loongson-gd@loongson-gd-PC 
          #######          -------------------------- 
          ##O#O##          OS: UnionTech OS Desktop 20 Pro mips64 
          #######          Host: LEMOTE-LS3A4000-7A1000-1w-V0.1-pc 
        ###########        Kernel: 5.9.13 
       #############       Uptime: 2 mins 
      ###############      Packages: 1859 (dpkg) 
      ################     Shell: bash 5.0.3 
     #################     Icons: bloom [GTK2/3] 
   #####################   Terminal: /dev/pts/1 
   #####################   CPU: ICT Loongson-3 V0.4 (4) 
     #################     GPU: AMD ATI Radeon HD 6450/7450/8450 / R5 230 OEM 
                           Memory: 799MiB / 7492MiB