Re: [Xen-devel] Blocking upcall to dom0

[Steven Hand <Steven.Hand@xxxxxxxxxxxx>]

> Keir Fraser <Keir.Fraser@xxxxxxxxxxxx> wrote:
> > In what context do you want to block? That of some other domain, or 
> > block all domains while dom0 executes, or something else?
> 
> I want to block in the context of the unprivileged domain that was
> running, and only block that domain.  In the hypercall example I gave,
> I'd want the domain that invoked the hypercall to block within Xen until
> dom0 completed the upcall.

Why not just use an event channel? This is precisely what they 
are for. That way the invoking domain can simply kick an event, 
and block waiting for a response. No new magic required in Xen
at all.

S.


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