[Xen-users] PCI passthrough help!

[hyyang <hawyuan@xxxxxxxxx>]

Hi,

 

I am testing the PCI passthrough feature by using xen-unstable and Intel DQ35JO motherboard.

The passthrough seems not working. The PCI devices I want to hide still shows up in lspci. The HVM

creation failed with the following message:

 

VmError: Fail to assign device(0:1a.7): maybe VT-d is not enabled, or the device is not exist, or it has already been assigned to other domain
 

I have complied the PCI backend driver into Dom0 kernel and also turn on the PCI backend debug option.

The VT-d option in BIOS is enabled.

 

Following are my grub.config, hvm, and pciback debug output.

 

In grub.config:

 

title Xen 3.2 unstable
        root (hd0,0)
        kernel /boot/xen-3.2.gz console=vga
        module /boot/vmlinuz-2.6.18.8-xen ro root=LABEL=/ rhgb quiet pciback.permissive pciback.hide=(00:1a.7)(00:1d.7 )
        module /boot/initrd-2.6.18.8-xen.img

 

In hvm file I add:

 

     pci = ['00:1a.7']

 

Here is the dmesg | grep pciback:

 

Bootdata ok (command line is ro root=LABEL=/ rhgb quiet pciback.permissive pciback.hide=(00:1a.7)(00:1d.7))
Kernel command line: ro root=LABEL=/ rhgb quiet pciback.permissive pciback.hide=(00:1a.7)(00:1d.7)
Unknown boot option `pciback.permissive': ignoring
pciback: wants to seize 0000:00:1a.7
pciback: wants to seize 0000:00:1d.7
pciback 0000:00:00.0: probing...
pciback 0000:00:02.0: probing...
pciback 0000:00:02.1: probing...
pciback 0000:00:03.0: probing...
pciback 0000:00:03.2: probing...
pciback 0000:00:03.3: probing...
pciback 0000:00:19.0: probing...
pciback 0000:00:1a.0: probing...
pciback 0000:00:1a.1: probing...
pciback 0000:00:1a.2: probing...
pciback 0000:00: 1a.7: probing...
pciback 0000:00:1a.7: seizing device
pciback 0000:00:1a.7: pcistub_device_alloc
pciback 0000:00:1a.7: deferring initialization
pciback 0000:00:1b.0: probing...
pciback 0000:00:1c.0: probing...
pciback 0000:00:1c.1: probing...
pciback 0000:00:1c.2: probing...
pciback 0000:00:1c.3: probing...
pciback 0000:00:1c.4: probing...
pciback 0000:00:1d.0: probing...
pciback 0000:00:1d.1: probing...
pciback 0000:00: 1d.2: probing...
pciback 0000:00:1d.7: probing...
pciback 0000:00:1d.7: seizing device
pciback 0000:00:1d.7: pcistub_device_alloc
pciback 0000:00:1d.7: deferring initialization
pciback 0000:00:1e.0: probing...
pciback 0000:00:1f.0: probing...
pciback 0000:00:1f.2: probing...
pciback 0000:00:1f.3: probing...
pciback 0000:00:1f.5: probing...
pciback 0000:03:00.0: probing...
pciback 0000:06:03.0: probing...
pciback: pcistub_init_devices_late
pciback 0000:00:1d.7: initializing...
pciback 0000:00:1d.7: initializing config
pciback 0000:00:1d.7: initializing virtual configuration space
pciback 0000:00:1d.7: added config field at offset 0x04
pciback 0000:00: 1d.7: added config field at offset 0x3c
pciback 0000:00:1d.7: added config field at offset 0x3d
pciback 0000:00:1d.7: added config field at offset 0x0c
pciback 0000:00:1d.7: added config field at offset 0x0d
pciback 0000:00: 1d.7: added config field at offset 0x0f
pciback 0000:00:1d.7: added config field at offset 0x10
pciback 0000:00:1d.7: added config field at offset 0x14
pciback 0000:00:1d.7: added config field at offset 0x18
pciback 0000:00: 1d.7: added config field at offset 0x1c
pciback 0000:00:1d.7: added config field at offset 0x20
pciback 0000:00:1d.7: added config field at offset 0x24
pciback 0000:00:1d.7: added config field at offset 0x30
pciback 0000:00: 1d.7: Found capability 0x1 at 0x50
pciback 0000:00:1d.7: added config field at offset 0x50
pciback 0000:00:1d.7: added config field at offset 0x52
pciback 0000:00:1d.7: added config field at offset 0x54
pciback 0000:00: 1d.7: added config field at offset 0x56
pciback 0000:00:1d.7: added config field at offset 0x57
pciback 0000:00:1d.7: enabling device
pciback 0000:00:1d.7: reset device
pciback 0000:00:1a.7: initializing...
pciback 0000:00:1a.7: initializing config
pciback 0000:00:1a.7: initializing virtual configuration space
pciback 0000:00:1a.7: added config field at offset 0x04
pciback 0000:00:1a.7: added config field at offset 0x3c
pciback 0000:00:1a.7: added config field at offset 0x3d
pciback 0000:00:1a.7: added config field at offset 0x0c
pciback 0000:00:1a.7: added config field at offset 0x0d
pciback 0000:00:1a.7: added config field at offset 0x0f
pciback 0000:00:1a.7: added config field at offset 0x10
pciback 0000:00:1a.7: added config field at offset 0x14
pciback 0000:00:1a.7: added config field at offset 0x18
pciback 0000:00:1a.7: added config field at offset 0x1c
pciback 0000:00:1a.7: added config field at offset 0x20
pciback 0000:00:1a.7: added config field at offset 0x24
pciback 0000:00:1a.7: added config field at offset 0x30
pciback 0000:00:1a.7: Found capability 0x1 at 0x50
pciback 0000:00:1a.7: added config field at offset 0x50
pciback 0000:00:1a.7: added config field at offset 0x52
pciback 0000:00:1a.7: added config field at offset 0x54
pciback 0000:00:1a.7: added config field at offset 0x56
pciback 0000:00:1a.7: added config field at offset 0x57
pciback 0000:00:1a.7: enabling device
pciback 0000:00:1a.7: reset device
 

 

 

 

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