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[Xen-users] pci passthrough on RHEL 4.5

To: <xen-users@xxxxxxxxxxxxxxxxxxx>
Subject: [Xen-users] pci passthrough on RHEL 4.5
From: "Bao Chunjie" <bcj_sec@xxxxxxxxxxx>
Date: Fri, 20 Jun 2008 13:57:59 +0800
Delivery-date: Thu, 19 Jun 2008 22:58:23 -0700
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Hi there,

  I have a Dell T3400 Workstation with CentOS5.1 as dom0.  I have hidden
a network interface in dom0 to pass it to domU.  The domU can come up with
the NIC when it's OS is CentOS5.1 or RHEL5.  But when it comes to RedHat4.5
, the NIC can not be found.
  As I type the command "lspci" in RHEL4.5 domU, it returned:
      pcilib: Cannot open /proc/bus/pci
      lspci: Cannot find any working access method.

  And I found the three lines in "dmesg"  output:
      XENBUS: Device with no drvier: device/vbd/51713
      XENBUS: Device with no driver: device/pci/0
      XENBUS: Device with no driver: device/vif/0

After that, I tried to rebuild redhat4.5's kernel, and set:
      CONFIG_PCI=y
      CONFIG_XEN_PCIDEV_FRONTEND=y
in the config file "kernel-2.6.9-i686-xenU.config".
  But the new kernel make no difference in the above scenario. I found,
in the file "kernel-2.6.9-i686-xenU.config" that "CONFIG_PCI is not set" appears twice, one of which can not be changed, otherwise, kernel build will fail.

  Does anyone has similar experience on this issue? Thanks a lot!

--Jerry

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