Title : How to do PCI Passthrough with VT-d Authors : Allen Kay Weidong Han Created : October-24-2007 Updated : October-24-2007 How to turn on VT-d in Xen -------------------------- 1 ) cd xen-unstable.hg 2 ) make install 3 ) make linux-2.6-xen-config CONFIGMODE=menuconfig 4 ) change XEN->"PCI-device backend driver" from "M" to "*". 5 ) make linux-2.6-xen-build 6 ) make linux-2.6-xen-install 7 ) depmod 2.6.18.8-xen 8 ) mkinitrd -v -f --with=ahci --with=aacraid --with=sd_mod --with=scsi_mod initrd-2.6.18-xen.img 2.6.18.8-xen 9 ) cp initrd-2.6.18-xen.img /boot 10) lspci - select the PCI BDF you want to assign to guest OS 11) "hide" pci device from dom0 as following sample grub entry: title Xen-Fedora Core (2.6.18-xen) root (hd0,0) kernel /boot/xen.gz com1=115200,8n1 console=com1 vtd=1 module /boot/vmlinuz-2.6.18.8-xen root=LABEL=/ ro console=tty0 console=ttyS0,115200,8n1 pciback.hide=(01:00.0)(03:00.0) pciback.verbose_request=1 apic=debug maxcpus=1 module /boot/initrd-2.6.18-xen.img 12) reboot system 13) add "pci" line in /etc/xen/hvm.conf for to assigned devices pci = [ '01:00.0', '03:00.0' ] 15) start hvm guest and use "lspci" to see the passthru device and "ifconfig" to see if IP address has been assigned to NIC devices. VT-d Enabled Systems -------------------- 1) For VT-d enabling work on Xen, we have been using development systems using following Intel motherboards: - DQ35MP - DQ35JO 2) As far as we know, following OEM systems also has vt-d enabled. Feel free to add others as they become available. - Dell: Optiplex 755 http://www.dell.com/content/products/category.aspx/optix?c=us&cs=555&l=en&s=biz - HP Compaq: DC7800 http://h10010.www1.hp.com/wwpc/us/en/en/WF04a/12454-12454-64287-321860-3328898.html