sudo modprobe tun tap
    sudo ip link add br0 type bridge
    sudo ip address add 10.0.2.2/24 dev br0
    sudo ip link set dev br0 up
#启动后手工指定IP

sudo apt -y install libvirt-daemon bridge-utils virt-manager
#重启后，后台有一个virbr0守候，ifconfig可见,ip默认为192.168.122.1(ip段可修改，个人认为没必要）。

-netdev bridge,id=net0,br=virbr0 -device virtio-net-device,netdev=net0,mac=12:22:33:44:55:66

-append "console=ttyAMA0,115200 init=/bin/init hardware=qemu.arm.linux default_boot_device=a003e00.virtio_mmio root=/dev/ram0 rw ip=dhcp"

#下面好像可以配置固定ip
#ip=192.168.122.10:192.168.122.1:192.168.122.1:255.255.255.0::eth0:on
#下面可以配置dns
#echo "nameserver 8.8.8.8" >/etc/resolv.conf

https://gitee.com/openharmony/kernel_linux_config/blob/master/linux-5.10/arch/arm/configs/qemu-arm-linux_standard_defconfig

https://gitee.com/wawanala/ohos/blob/master/qemu-arm-mini-selinux.config

Device Drivers > Sound card support > Advanced Linux Sound Architecture > PCI sound devices->
<*>   (Creative) Ensoniq AudioPCI 1370

Device Drivers > Real Time Clock
<*>   ARM AMBA PL031 RTC

-device virtio-gpu-pci,xres=480,yres=960,addr=08.0,max_outputs=1

[drm] pci: virtio-gpu-pci detected at 0000:00:08.0
[drm] features: -virgl +edid
[drm] number of scanouts: 1
[drm] number of cap sets: 0
[drm] Initialized virtio_gpu 0.1.0 0 for virtio6 on minor 0
Console: switching to colour frame buffer device 60x60
virtio_gpu virtio6: [drm] fb0: virtio_gpudrmfb frame buffer device

#1、精简写法，直接添加启动-bios参数
-bios edk2-arm-code.fd
#文件路径在/usr/local/share/qemu/edk2-arm-code.fd，qemu会自动找到,若找不到，可以手动直接指定。
#2、常见的通用方法
#制作flash0.img
dd if=/dev/zero of=flash0.img bs=1M count=64
dd if=/usr/local/share/qemu/edk2-arm-code.fd bs=1M of=flash0.img conv=notrunc
#添加启动参数
    -drive if=pflash,file=flash0.img,format=raw,readonly=on

#目前ohos环境下es1370 AC97 ich9-intel-hd intel-hda usb-audio经测试均可以使用，以后启用hdf可以选取一个通用，暂时使用es1370
#kernel 使能es1370
#qemu 编译时增加音频组件
#qemu 添加参数
-device es1370

https://gitee.com/openharmony/build
https://gitee.com/xfan1024

https://www.alsa-project.org/files/pub/lib/alsa-lib-1.2.5.1.tar.bz2
https://www.alsa-project.org/files/pub/utils/alsa-utils-1.2.5.1.tar.bz2
https://travis-ci.org/github/tinyalsa/tinyalsa
#下面地址应该也行，不过最近未测试。
# https://gitee.com/openharmony-sig/alsa-lib
# https://gitee.com/openharmony-sig/alsa-utils
# https://gitee.com/openharmony-sig/third_party_tinyalsa

#作为测试，将applications/standard作为编译目录
#将上面下载的三个压缩包解压到applications/standard
#文件夹改名后为“alsa-lib" "alsa-utils“ ”tiny-alsa“

const char *_snd_module_control_empty = "";

cd applications/standard/alsa-lib
./configure --prefix=/system/usr
#以后可改为ohos_build自动配置

  "alsa-lib": {
    "path": "applications/standard/alsa-lib",
    "name": "alsa-lib"
  },
  "alsa-utils": {
    "path": "applications/standard/alsa-utils",
    "name": "alsa-utils"
  },
  "tiny-alsa": {
    "path": "applications/standard/tiny-alsa",
    "name": "tiny-alsa"
  },

    {
      "subsystem": "alsa-utils",
      "components": [
        {
          "component": "alsa-utils",
          "features": []
        }
      ]
    },
    {
      "subsystem": "alsa-lib",
      "components": [
        {
          "component": "alsa-lib",
          "features": []
        }
      ]
    },
    {
      "subsystem": "tiny-alsa",
      "components": [
        {
          "component": "tiny-alsa",
          "features": []
        }
      ]
    },

https://gitee.com/wawanala/ohos/blob/master/qemu-alsa/alsa-lib/BUILD.gn
https://gitee.com/wawanala/ohos/blob/master/qemu-alsa/alsa-lib/ohos.build
#上面两个文件放到applications/standard/alsa-lib目录下
https://gitee.com/wawanala/ohos/blob/master/qemu-alsa/alsa-utils/BUILD.gn
https://gitee.com/wawanala/ohos/blob/master/qemu-alsa/alsa-utils/ohos.build
#上面两个文件放到applications/standard/alsa-utils目录下
https://gitee.com/wawanala/ohos/blob/master/qemu-alsa/tiny-alsa/BUILD.gn
https://gitee.com/wawanala/ohos/blob/master/qemu-alsa/tiny-alsa/ohos.build
#上面两个文件放到applications/standard/tiny-alsa目录下

audio:x:0:audio

#按正常编译命令进行

# 编译打包或复制wav文件，启动到命令行后，执行
aplay /etc/demo.wav
tinyplay /etc/dynamic.wav

编译音频测试组件
./build.sh --product-name hispark_taurus_standard --build-target audio_unit_test

使能音频tinyalsa接口
vi vendor/hisilicon/hispark_taurus_standard/hals/audio/product.gni
enable_audio_alsa_mode = true

#添加audio驱动接口
vi drivers/peripheral/audio/supportlibs/tinyalsa_adapter/src/audio_hw.c
    {"AudioPCI", NULL},
    {"AudioPCI", "ES1370/1"},
    {"AudioPCI", "ES1370/2"},

#复制测试文件
cp /test/tassel.wav /data/test_44100_2.wav

#开始跑示例: [run ok] 期间正常会输出声音
audio_renderer_unit_test

#!/bin/bash
#write by wawanala <wawanala@163.com>

#find  src/conf -name  "*.conf" | sort >> temp.txt
while read file_full_name
do
    file_full_name_length=${#file_full_name}
    file_name=${file_full_name: 9}
    file_split_num=`echo $file_name |grep  -b -o "/" | cut -d: -f1 | tail -n 1`
    file_dir_name=${file_name: 0:$file_split_num}
    file_name_to_etc=${file_name//\//-}
    file_name_length=${#file_name_to_etc}-5
    echo "ohos_prebuilt_etc(\"alsa-lib-${file_name_to_etc: 0:$file_name_length}\") {"
    echo "source = \"$file_full_name\""
    echo 'install_enable = true'
    echo "module_install_dir = \"usr/share/alsa/$file_dir_name\""
    echo 'subsystem_name = "applications"'
    echo 'part_name = "alsa-lib"'
    echo "}"
    echo ""
done < ./temp.txt

#!/bin/bash
#write by wawanala <wawanala@163.com>

#find  src/conf -name  "*.conf" | sort >> temp.txt
while read file_full_name
do
    file_full_name_length=${#file_full_name}
    file_name=${file_full_name: 9}
    file_split_num=`echo $file_name |grep  -b -o "/" | cut -d: -f1 | tail -n 1`
    file_dir_name=${file_name: 0:$file_split_num}
    file_name_to_etc=${file_name//\//-}
    file_name_length=${#file_name_to_etc}-5
    
    echo "        \"//applications/standard/alsa-lib:alsa-lib-${file_name_to_etc: 0:$file_name_length}\","
done < ./temp.txt

    -rtc base=localtime,clock=host
#启动后可见/dev/rtc0设备
#date显示时间与主机同步。    

＃参照虚拟屏幕大小制作，如：480x960
https://gitee.com/openharmony/graphic_graphic_2d/tree/master/frameworks/bootanimation/data/bootanimation_tool