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[Xen-users] problem of xen PCI-passthrough

  • To: xen-users@xxxxxxxxxxxxxxxxxxx
  • From: Mingfan Lu <mingfan.lu@xxxxxxxxx>
  • Date: Wed, 9 Jun 2010 00:16:23 +0800
  • Delivery-date: Tue, 08 Jun 2010 09:20:09 -0700
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  • List-id: Xen user discussion <xen-users.lists.xensource.com>


 My Configuration

 Xen-4.0 + DOM0( pv) + DOMU( pv)

 The domu’s configuration is

DOMU configuration:



kernel = "/opt/need_packages/Kernel/euca_install/images/lamp_minimal/vmlinuz-"

ramdisk = "/opt/need_packages/Kernel/euca_install/images/lamp_minimal/initrd-" #can be created by "mkinitrd"

memory = 512


name = "ExampleDomainXenU"


vif = [ ]

disk = [ 'file:/opt/need_packages/Kernel/euca_install/images/lamp_minimal/mini-lamp.fs,xvda1,w','file:/opt/need_packages/Kernel/euca_install/images/lamp_minimal/ephemeral,xvda2,w','file:/opt/need_packages/Kernel/euca_install/images/lamp_minimal/swap,xvda3,w' ]

root = "/dev/xvda1"

extra = "3 swiotlb=force"


 I have hidden the pci device to my Domu before create the instance.


 Checking: xm pci-list

 xm pci-list 4

domain bus  slot func

0x0000 0x01 0x00 0x1


 But in the domu, using lspci, I could get nothing

 In dmesg’s output, I find that:


[    0.055642] pci_hotplug: PCI Hot Plug PCI Core version: 0.5

[    0.057885] pcifront pci-0: backend going away!

[    0.060359] pcifront pci-0: Device is in 6 state. Need to change state on the privileged domain.


What happened?


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