This article touched on device emulation, and one of the most important applications that provides this functionality is QEMU (a system emulator).
本文讨论设备模拟，提供该功能的最重要应用程序之一是QEMU(一个系统模拟器)。
As the name implies, rather than the device emulation being embedded within the hypervisor, it is instead implemented in user space.
顾名思义，这种设备模拟是在用户空间中实现的，而不嵌入到管理程序中。
Regardless of whether the device emulation occurs in the hypervisor or on top in a guest virtual machine (VM), the emulation methods are similar.
无论设备模拟发生在管理程序内还是在一个客户虚拟机(VM)之上，模拟方法都是相似的。
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