Re: [Xen-devel] Intel S3420GPLX VT-d VF question

["Michael A. Collins" <mike@xxxxxxxxxxx>]

On Thu, 09 Dec 2010 22:18:45 -0500, "Michael A. Collins" 
<mike@xxxxxxxxxxx> wrote:
> On Wed, 8 Dec 2010 12:50:35 -0500, Konrad Rzeszutek Wilk
> <konrad.wilk@xxxxxxxxxx> wrote:
> > Take your time.
> Seems as the igb module was loaded in the initramfs and was not
> reloaded using the options specified in my igb.conf file under
> /etc/modprobe.d.  I rmmod igb and did a modprobe igb max_vfs=7 and
> suddenly all the Virtual Functions showed up.  So that was the 
> problem
> all along.  Until I figure out how to edit the initramfs to load igb
> with max_vfs option, I'm putting the rmmod and modprobe in the
> rc.local file, that seems to work well and it gets executed before
> xend.  I am build xen-4.0-testing to replace the rpms I used.  Once
> all that is done and I test passing through one of the Virtual
> Functions to a vm, I'll report back.
> Mike

Ok, so I can pass one of the virtual functions through to a HVM.  I 
think I'm still not out of the water though.  It's acting very strangely 
and I have not successfully been able to very layer-2 connectivity with 
it.  I am seeing the following in my HVM's qemu log:
register_real_device: Assigning real physical device 04:10.4 ...
pt_dev_is_virtfn: 0000:04:10.4 is a SR-IOV Virtual Function
pt_iomul_init: Error: pt_iomul_init can't open file /dev/xen/pci_iomul: 
No such file or directory: 0x4:0x10.0x4
pt_register_regions: IO region registered (size=0x00004000 
base_addr=0xb2448004)
pt_register_regions: IO region registered (size=0x00004000 
base_addr=0xb2468004)
pt_msix_init: get MSI-X table bar base b2468000
pt_msix_init: table_off = 0, total_entries = 3
pt_msix_init: errno = 2
pt_msix_init: mapping physical MSI-X table to 7fe3c4359000
register_real_device: Real physical device 04:10.4 registered 
successfuly!
IRQ type = INTx
generate a sci for PHP.
deassert due to disable GPE bit.
pt_pci_write_config: Warning: Guest attempt to set address to unused 
Base Address Register. [00:06.0][Offset:30h][Length:4]
pt_iomem_map: e_phys=20000000 maddr=b2448000 type=0 len=16384 index=0 
first_map=1
pt_iomem_map: e_phys=20004000 maddr=b2468000 type=0 len=16384 index=3 
first_map=1

Now, I never see a pt_msi_setup: msi mapped with pirq XX line, which 
leads me to believe that the pass through isn't actually working.  I am 
still using the mayoung built xen-4.0.1-6 rpms from koji, since I have 
not been able to successfully compile xen stubdom.  I guess gcc 4.5 is 
just too new and untested for me to troubleshoot and get through.  
Hopefully, someone on here can point me in the right direction.
Mike


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