[PATCH 5/5] vfio-pci: Allow to mmap MSI-X table if interrupt remapping is supported

[Tian, Kevin]

> From: Yongji Xie
> Sent: Wednesday, April 27, 2016 8:43 PM
> 
> This patch enables mmapping MSI-X tables if hardware supports
> interrupt remapping which can ensure that a given pci device
> can only shoot the MSIs assigned for it.
> 
> With MSI-X table mmapped, we also need to expose the
> read/write interface which will be used to access MSI-X table.
> 
> Signed-off-by: Yongji Xie <xyjxie at linux.vnet.ibm.com>

A curious question here. Does "allow to mmap MSI-X" essentially
mean that KVM guest can directly read/write physical MSI-X
structure then?

Thanks
Kevin