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xen-devel
RE: [Xen-devel] [PATCH 4/5] VT-d support for PV guests
[Allen M Kay]
> - if ( iommu_enabled && is_hvm_domain(d) )
> + if ( iommu_enabled && (is_hvm_domain(d) || need_iommu(d)) )
> I thought PV guests don't have p2m page table. Why do you need to
> modify set_p2m_entry() for VT-d PV guest support?
If only HVM guests have a p2m page table then why was the
is_hvm_domain() check there is the first place? Can't you also have
PV guests with shadow page tables, and don't such guests also use p2m?
I haven't looked into shadow PT support, so I would really like to
have an answer on this one.
eSk
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