virtio-win驱动主要服务于kvm里的虚拟机。virtio-win驱动提供yum源，安装rpm包后，virtio驱动和agent默认都会安装在/usr/share/virtio-win目录中，这些可以共享给windows的虚拟机。
添加repo
该repo文件提供两个不同的仓库：
virtio-win-stable
默认，该仓库的版本和RHEL版本关联在一起发布，意味着得到了非常多的测试，很稳定。
virtio-win-latest
该仓库提供最新的build版本，这些版本可能有各种问题，用户需自己承担风险。这个仓库默认是disable的。如果你想从稳定版更新到最新版，可以使用如下命令：sudo yum --enablerepo=virtio-win-latest update virtio-win
使用yum安装virtio-win软件包：
安装完成后的文件会存放在/user/share，内容如下：
/usr/share/virtio-win/*.iso: ISO镜像，包含所有驱动，详细内容后面会描述
/usr/share/virtio-win/*.vfd: 用于Windows XP下的VFD软驱镜像
/usr/share/virtio-win/drivers: 从VFD软驱镜像中提取的文件
/usr/share/guest-agent/*.msi: QEMU Guest Agent 32bit 和 64bit 安装包
其中ISO镜像内容为:
NetKVM/: Virtio网络驱动
viostor/: Virtio块驱动
vioscsi/: Virtio SCSI驱动
viorng/: Virtio RNG驱动
vioser/: Virtio串口驱动
Balloon/: Virtio 内存气球驱动
qxl/: 用于Windows 7及之前版本的QXL显卡驱动. (virtio-win-0.1.103-1和之后版本会创建)
qxldod/: 用于Windows 8及之后版本的QXL显卡驱动. (virtio-win-0.1.103-2和之后版本会创建)
pvpanic/: QEMU pvpanic 设备驱动 (virtio-win-0.1.103-2和之后版本会创建)
guest-agent/: QEMU Guest Agent 32bit 和 64bit 安装包
qemupciserial/: QEMU PCI 串口设备驱动
另外： *.vfd: 用于Windows XP下的VFD软驱镜像
直接下载.iso、.vfd、和qemu-ga这些安装包，下载地址如下：
稳定版virtio-win iso:
https://fedorapeople.org/groups/virt/virtio-win/direct-downloads/stable-virtio/virtio-win.iso
稳定版virtio-win x86 floppy:
https://fedorapeople.org/groups/virt/virtio-win/direct-downloads/stable-virtio/virtio-win_x86.vfd
稳定版virtio-win amd64 floppy:
https://fedorapeople.org/groups/virt/virtio-win/direct-downloads/stable-virtio/virtio-win_amd64.vfd
最新版virtio-win iso:
https://fedorapeople.org/groups/virt/virtio-win/direct-downloads/latest-virtio/virtio-win.iso
最新版virtio-win x86 floppy:
https://fedorapeople.org/groups/virt/virtio-win/direct-downloads/latest-virtio/virtio-win_x86.vfd
最新版virtio-win amd64 floppy:
https://fedorapeople.org/groups/virt/virtio-win/direct-downloads/latest-virtio/virtio-win_amd64.vfd
最新版qemu-ga files:
https://fedorapeople.org/groups/virt/virtio-win/direct-downloads/latest-qemu-ga/
全部下载目录:
https://fedorapeople.org/groups/virt/virtio-win/direct-downloads/
变更日志:
https://fedorapeople.org/groups/virt/virtio-win/CHANGELOG