Re: KVM handling external interrupts

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Jan Kiszka <jan.kiszka@xxxxxx> wrote on 07/06/2012 15:11:24:

> > Am I missing something ? In your case, I assume, [virtual = logical]
and
> > [linear = linear]
> > or you are using some different semantics ?
> No, you are right, the descriptor tables run through paging as well.

Txs. Now that you understand your mistake, the discussion will be simpler.

 > But how do you ensure that the shadow IDT is mapped where you expect it?

First, I assume,  you will agree with us that using the e820 as you
suggested doesn't help because we need mapped memory.

How ? As we described in the paper, we use the PCI BAR to obtain mapped
memory.
Where ? Doesn't matter. We know the GPA of the BAR and just do a reverse
translation to obtain the GVA.

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