RE: [Xen-devel] Blocking upcall to dom0

["Ian Pratt" <m+Ian.Pratt@xxxxxxxxxxxx>]

> For example, on each hypercall from a particular domU, I'd want to
> collect a bunch of state from within Xen and pass that state to dom0,
> then wait for a return value before continuing on with the 
> hypercall.  

Take a look at what happens with VT-x domains when they do a 'memory
load' from emulated MMIO space. 

You'll have to think about what you want to happen with SMP guests --
block the VCPU or the whole guest.

Ian



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