[Xen-devel] Hypercall continuation and wait_event

[Ruslan Nikolaev <nruslan_devel@xxxxxxxxx>]

Hi

I am curious how I can properly support hypercall continuation and wait_event. 
I have a dedicated VCPU in a domain which makes a special hypercall, and the 
hypercall waits for certain event to arrive. I am using queues available in 
Xen, so wait_event will be invoked in the hypercall once its ready to accept 
events. However, my understanding that even though I have a dedicated VCPU for 
this hypercall, I still may need to support hypercall continuation properly. 
(Is this the case?) So, my question is how exactly the need for hypercall 
preemption may affect wait_event() and wait() operations, and where would I 
need to do hypercall_preempt_check()?

Thank you!
Ruslan


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