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UNIX for Advanced & Expert Users
EACCES "Permission denied" while open(2)
Post 302421544 by ulidtko on Friday 14th of May 2010 04:21:07 PM
05-14-2010
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LEARN ABOUT NETBSD
xpci
XPCI(4) BSD/xen 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 physi- cal memory portions, via DMA. BSD
January 8, 2011 BSD