AW: [Xen-users] Paramters for PCI passthrough in config file

[Carsten Schiers <carsten@xxxxxxxxxx>]

It's most likely that your PCI devices reside on the same PCI bridge. When 
including
support for FLR, a requirement check was added to have all PCI devices that 
reside on
one PCI bridge to be co-assiged to one DomU, although that's not necessary when 
the
DomU is PV.

You can check with lspci -tv whether this is the case and when you use pv 
domains, 
you might use this patch that will disable FLR and this kind of message.

BR,

Carsten.

diff -r 6ab55f716ce3 tools/python/xen/util/pci.py
--- a/tools/python/xen/util/pci.py  Thu Oct 09 17:18:11 2008 +0100
+++ b/tools/python/xen/util/pci.py  Fri Oct 10 13:16:00 2008 +0800
@@ -696,6 +696,7 @@ class PciDevice:
     def do_FLR(self):
         """ Perform FLR (Functional Level Reset) for the device.
         """
+        return
         if self.dev_type == DEV_TYPE_PCIe_ENDPOINT:
             # If PCIe device supports FLR, we use it.
             if self.pcie_flr:
diff -r 6ab55f716ce3 tools/python/xen/xend/server/pciif.py
--- a/tools/python/xen/xend/server/pciif.py Thu Oct 09 17:18:11 2008 +0100
+++ b/tools/python/xen/xend/server/pciif.py Fri Oct 10 13:18:25 2008 +0800
@@ -375,6 +375,7 @@ class PciController(DevController):
             pci_dev_list = pci_dev_list + [(domain, bus, slot, func)]

         for (domain, bus, slot, func) in pci_dev_list:
+            continue
             try:
                 dev = PciDevice(domain, bus, slot, func)
             except Exception, e:

----- Originalnachricht -----
Von: Hans Jörg Maurer <hjm@xxxxxxxxxxxxx>
Gesendet: Die, 3.3.2009 11:56
An: xen-users@xxxxxxxxxxxxxxxxxxx
Betreff: [Xen-users] Paramters for PCI passthrough in config file

Hi,
I was trying now since two weeks to pass pci cards to different domU's. 
First I used XEN 3.3, but there I got error messages like

must be co-assigned to the same guest , so I switched to other distris and 
versions.

Now I have:

mainserver:/etc/xen# xm info
host                   : server
release                : 2.6.26-1-xen-amd64
version                : #1 SMP Sat Jan 10 20:39:26 UTC 2009
machine                : x86_64
nr_cpus                : 4
nr_nodes               : 1
cores_per_socket       : 4
threads_per_core       : 1
cpu_mhz                : 2394
hw_caps                : 
bfebfbff:20100800:00000000:00000140:0000e3bd:00000000:00000001
total_memory           : 8180
free_memory            : 256
node_to_cpu            : node0:0-3
xen_major              : 3
xen_minor              : 2
xen_extra              : -1
xen_caps               : xen-3.0-x86_64 xen-3.0-x86_32p hvm-3.0-x86_32 
hvm-3.0-x86_32p hvm-3.0-x86_64
xen_scheduler          : credit
xen_pagesize           : 4096
platform_params        : virt_start=0xffff800000000000
xen_changeset          : unavailable
cc_compiler            : gcc version 4.3.1 (Debian 4.3.1-2)
cc_compile_by          : waldi
cc_compile_domain      : debian.org
cc_compile_date        : Sat Jun 28 09:32:18 UTC 2008
xend_config_format     : 4

and run into the problem that I can pass only one pci to a DomU. I use the 
following parameters in the /etc/xen/domU.cfg


pci         = [ '11:00.0','11:09:0' ]

I have tried different versions like
pci         = [ '11:00.0', '11:09:0' ] or
pci         = [ '0000:11:00.0', '0000:11:09:0' ] and so on.

The only solution is to pass these parameters with the command line, like:

server:/etc/xen# xm create DomU.cfg -c pci='11:00.0' pci='11:09.0'

Then I get two PCI cards inside the DomU.

Does anyone know how to pass them correctly inside the config file.

Thanks

Hans

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