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77 lines
2.4 KiB
Plaintext
77 lines
2.4 KiB
Plaintext
Title : How to do PCI Passthrough with VT-d
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Authors : Allen Kay <allen.m.kay@intel.com>
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Weidong Han <weidong.han@intel.com>
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Created : October-24-2007
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Updated : December-13-2007
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How to turn on VT-d in Xen
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--------------------------
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1 ) cd xen-unstable.hg
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2 ) make install
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3 ) make linux-2.6-xen-config CONFIGMODE=menuconfig
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4 ) change XEN->"PCI-device backend driver" from "M" to "*".
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5 ) make linux-2.6-xen-build
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6 ) make linux-2.6-xen-install
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7 ) depmod 2.6.18.8-xen
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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
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9 ) cp initrd-2.6.18-xen.img /boot
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10) lspci - select the PCI BDF you want to assign to guest OS
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11) "hide" pci device from dom0 as following sample grub entry:
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title Xen-Fedora Core (2.6.18-xen)
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root (hd0,0)
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kernel /boot/xen.gz com1=115200,8n1 console=com1
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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
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module /boot/initrd-2.6.18-xen.img
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12) reboot system
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13) add "pci" line in /etc/xen/hvm.conf for to assigned devices
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pci = [ '01:00.0', '03:00.0' ]
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15) start hvm guest and use "lspci" to see the passthru device and
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"ifconfig" to see if IP address has been assigned to NIC devices.
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Caveat on Conventional PCI Device Passthrough
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---------------------------------------------
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VT-d spec specifies that all conventional PCI devices behind a
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PCIe-to-PCI bridge have to be assigned to the same domain.
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PCIe devices do not have this restriction.
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VT-d Works on OS:
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-----------------
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1) Host OS: PAE, 64-bit
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2) Guest OS: 32-bit, PAE, 64-bit
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Because current Xen doesn't support MSI, for guest OS which uses MSI by default, need to add "pci=nomsi" option on its grub, e.g. RHEL5, FC6.
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Combinations Tested:
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--------------------
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1) 64-bit host: 32/PAE/64 Linux/XP/Win2003/Vista guests
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2) PAE host: 32/PAE Linux/XP/Win2003/Vista guests
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VT-d Enabled Systems
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--------------------
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1) For VT-d enabling work on Xen, we have been using development
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systems using following Intel motherboards:
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- DQ35MP
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- DQ35JO
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2) As far as we know, following OEM systems also has vt-d enabled.
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Feel free to add others as they become available.
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- Dell: Optiplex 755
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http://www.dell.com/content/products/category.aspx/optix?c=us&cs=555&l=en&s=biz
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- HP Compaq: DC7800
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http://h10010.www1.hp.com/wwpc/us/en/en/WF04a/12454-12454-64287-321860-3328898.html
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