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

El 08/12/14 a les 10.12, Jan Beulich ha escrit:
> PVH guests accessing I/O ports via string ops is not supported yet.
> Reported-by: Roger Pau MonnÃ<roger.pau@xxxxxxxxxx>
> Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>

This looks fine to me (at least it doesn't break the existing IN/OUT
users), and seems the best solution 4.5 wise:

Acked-by: Roger Pau Monnà <roger.pau@xxxxxxxxxx>

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.


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