【虚拟化】kernel OLK-5.10 supports KVM RISC-V

测试RISC-V虚拟化功能

1. 启动虚拟机
1.1 为仿真器配置虚拟网桥
$ brctl addbr virbr0
$ brctl stp virbr0 on
$ ifconfig virbr0 up
$ ifconfig virbr0 192.168.122.1 netmask 255.255.255.0

1.2 启动仿真器
$ ./qemu-system-riscv64 -M virt -m 4096M -cpu rv64,x-h=true -nographic \
    -name guest=riscv-hyp,debug-threads=on \
    -smp 4 \
    -bios ./fw_jump.bin \
    -kernel ./Image \
    -drive file=./hypervisor.img,format=raw,id=hd0 \
    -device virtio-blk-device,drive=hd0 \
    -append "root=/dev/vda rw console=ttyS0 earlycon=sbi" \
    -netdev type=tap,script=./ifup.sh,downscript=./ifdown.sh,id=net0 \
    -device virtio-net-device,netdev=net0
结果如下：
![输入图片说明](https://images.gitee.com/uploads/images/2020/1222/105400_d02c5773_7867572.png "屏幕截图.png")

1.3 启动RISC-V虚拟机
$ ./qemu-system-riscv64 -M virt,accel=kvm -m 512M -cpu host -nographic \
    -name guest=riscv-guest \
    -bios none \
    -smp 2 \
    -kernel ./Image \
    -drive file=./guest.img,format=raw,id=hd0 \
    -device virtio-blk,drive=hd0 \
    -append "root=/dev/vda rw console=ttyS0 earlycon=sbi"
结果如下：
![输入图片说明](https://images.gitee.com/uploads/images/2020/1222/111214_1584b385_7867572.png "屏幕截图.png")

2. 热迁移
2.1 在仿真器1上启动源端虚拟机
$ ./qemu-system-riscv64 -M virt,accel=kvm -m 512M -cpu host -nographic \
    -name guest=riscv-guest \
    -bios none \
    -smp 2 \
    -kernel ./Image \
    -drive file=./guest.img,format=raw,id=hd0 \
    -device virtio-blk,drive=hd0 \
    -append "root=/dev/vda rw console=ttyS0 earlycon=sbi" \
    -monitor tcp:0:55555,server,nowait \
2.2 在仿真器2上启动对端虚拟机，等待源端迁移
$ ./qemu-system-riscv64 -M virt,accel=kvm -m 512M -cpu host -nographic \
    -name guest=riscv-guest \
    -bios none \
    -smp 2 \
    -kernel ./Image \
    -drive file=./guest.img,format=raw,id=hd0 \
    -device virtio-blk,drive=hd0 \
    -append "root=/dev/vda rw console=ttyS0 earlycon=sbi" \
    -device i6300esb,id=watchdog \
    -serial tcp:0:33333,server,nowait \
    -incoming tcp:0:44444 \
    -monitor tcp:0:55555,server,nowait

2.3 登录仿真器1，启动热迁移
$ socat -,echo=0,icanon=0 tcp-connect:192.168.122.2:55555
(qemu) migrate -d -i tcp:192.168.122.3:44444

2.4 登录热迁移后的虚拟机
$ socat -,echo=0,icanon=0 tcp-connect:192.168.122.3:33333
结果如下：
![输入图片说明](https://images.gitee.com/uploads/images/2020/1222/112612_435c6ee8_7867572.png "屏幕截图.png")

GVP openEuler/kernel
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