[Xen-devel] some questions about vcpu?

["Haifeng Fang" <fhf25@xxxxxxx>]

hi, all

 

Recently, I want to add a hidden domain in Xen. So I have studied the source codes related to idle-vcpu.

Now, I have implemented a hidden domain, which contains a vcpu similar to idle-vcpu. In this vcpu, it used the same page-table with idle-vcpu, that is, idle_pg_table, so the vcpu can access the memory within xen hypervisor address space. Being apparent, this vcpu is like a kernel thread of linux.

 

Fortunately, the method is good when the changed xen is running under single physical CPU, while the running speed of domain became a little slow. However, when the changed xen is installed onto the machine with dual-core, the machine is dead. So, how can I solve the problem? If the death of machine is due to the vcpu's synchronization.

 

who can give me some advise?

 

Thanks in advance.

 

--Haifeng Fang

Beijing China

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