在其他商店，同时允许来宾和注册用户购物。
In the other stores, both guest and registered users are allowed to shop.
对于智利商店，通过订阅三个引导策略组并忽略允许来宾购物的B2C策略组，可以实现仅注册用户购物。
For the Chile store, you achieve only registered customer shopping by subscribing three bootstrapped policy group and ignoring the B2C policy group that allows guest shopping.
首先，类似于将用户空间应用程序和内核函数连接起来的系统调用，一个通常可用的虚拟化调用(hapercall, hypervisor对操作系统进行的系统调用)层允许来宾系统向宿主操作系统发出请求。
First, similar to system calls that bridge user-space applications with kernel functions, a hypercall layer is commonly available that allows guests to make requests of the host operating system.
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