Re: [Xen-devel] [PATCH v4 4/7] xen, common: add the XEN_DOMCTL_memory_mapping hypercall

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 02.04.14 at 11:43, <Ian.Campbell@xxxxxxxxxxxxx> wrote:
> This interface is already pretty broken for the case where a toolstack
> maps the same mfns into a guest twice. But that is a pretty broken thing
> for a toolstack to do.

Is it? In the context of the VGA ROM issue in qemu (discussed recently)
it seemed reasonable to me to map this at both the PCI BAR specified
location and the legacy ISA C0000h one. Similar considerations might
apply to other PCI option ROMs needed for booting (PXE comes to mind).

Jan


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