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

[Konrad Rzeszutek Wilk <konrad.wilk@xxxxxxxxxx>]

On Tue, Dec 09, 2014 at 06:01:54PM +0100, Roger Pau Monné wrote:
> 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 Monné<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 Monné <roger.pau@xxxxxxxxxx>

Release-Acked-by: Konrad Rzeszutek Wilk <konrad.wilk@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.
> 
> Roger.
> 

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