Re: Hypercall continuation and wait_event

[Keir Fraser <keir.xen@gmail.com>]

On 09/04/2012 18:51, "Ruslan Nikolaev" <nruslan_devel@yahoo.com> wrote:

> 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

No it's not the case, the old hypercall_create_continuation() mechanism does
not need to be used with wait_event().

 -- Keir

> 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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