Re: [Xen-devel] [PATCH 2/2] domain: use PGC_extra domheap page for shared_info

[David Woodhouse <dwmw2@xxxxxxxxxxxxx>]

On Fri, 2020-03-06 at 14:10 +0100, Jan Beulich wrote:
> Establishing of what the new separation rule and mechanism is going
> to be (no matter how the two resulting pieces are going to be
> named).

Paul's opinion seemed to be that with secret hiding coming along and
destroying the "xenheap is mapped anyway" assumption, the benefit of
allocating a xenheap page and then mapping it to a guest is basically
gone *anyway*, so that part at least made a viable cleanup regardless
of the overall direction.

By the time we start making the IOMMU use domheap for *its* page table
allocations because we want 'domheap ≡ preserved pages', yes I
completely agree that we should have settled the overall direction and
nomenclature first.

But I'm inclined to agree with Paul that this part stands by itself as
a cleanup regardless of that.

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