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NetBSD 6.1.5 - man page for xpci (netbsd section 4)

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XPCI(4) 			   BSD Kernel Interfaces Manual 			  XPCI(4)

NAME
     xpci -- Xen frontend paravirtualized PCI pass-through driver

SYNOPSIS
     xpci* at xenbus?
     pci* at xpci?

DESCRIPTION
     The xpci driver is the frontend part of the PCI pass-through functionality that can be used
     by Xen guest domains to communicate with PCI devices.

     From a guest point of view, xpci is similar to a pci(4) bus, except that the guest talks
     with the PCI backend driver instead of the real physical device directly.

     When the host domain is NetBSD, the xpci driver is backed by a pciback(4) driver within the
     dom0.

SEE ALSO
     pci(4), pciback(4), xenbus(4)

HISTORY
     The xpci driver first appeared in NetBSD 5.1.

AUTHORS
     The xpci driver was written by Manuel Bouyer <bouyer@NetBSD.org>.

SECURITY CONSIDERATIONS
     As PCI passthrough offers the possibility for guest domains to send arbitrary PCI commands
     to a physical device, this has direct impact on the overall stability and security of the
     system.  For example, in case of erroneous or malicious commands, the device could overwrite
     physical memory portions, via DMA.

BSD					 January 8, 2011				      BSD
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