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Re: [Xen-devel] [PATCH v2] VMX: don't allow PVH to reach handle_mmio()

>>> On 09.12.14 at 18:01, <roger.pau@xxxxxxxxxx> wrote:
> For 4.6 I think we need to start using a different hvm_io_bitmap for PVH
> Dom0 that allows direct access to the IO ports, bypassing the vmexit and
> simplifying the code in Xen (this would also fix INS/OUTS). Still not
> sure what should be done for PVH DomUs, specially when PVH gains support
> for pci-passthrough.

With the difficulty being that for PV the hypervisor intentionally
intercepts accesses to some of the ports, so we can't blindly
allow PVH access to all the ports its allowed access to.


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