pci pass-through on AMD architecture

[Jonas Pfoh <pfoh@sec.in.tum.de>]

Hello,

I seem to be having some issues making the pci pass-through work from 
the command line.  Interestingly, a hot-plug works (i.e., passing the 
device through via the qemu console).  Any help would be appreciated.

Thanks,
Jonas Pfoh

Below the attempt and error msgs:

# /usr/local/kvm/bin/qemu-system-x86_64 -m 2048 -hda 
/srv/kvm/suseimg.img -vnc localhost:1 -pcidevice host=00:09.0 -net none
create_userspace_phys_mem: Invalid argument
assigned_dev_iomem_map: Error: create new mapping failed


dmesg output:

...
pci-stub 0000:00:09.0: PCI INT A -> Link[LMAD] -> GSI 21 (level, low) -> 
IRQ 21
pci-stub 0000:00:09.0: irq 31 for MSI/MSI-X
pci-stub 0000:00:09.0: PCI INT A disabled



/proc/cpuinfo (one of two identical procs):

processor       : 0 

vendor_id       : AuthenticAMD 

cpu family      : 15 

model           : 107 

model name      : AMD Athlon(tm) Dual Core Processor 5050e 

stepping        : 2 

cpu MHz         : 1000.000 

cache size      : 512 KB 

physical id     : 0 

siblings        : 2
core id         : 0
cpu cores       : 2
apicid          : 0
initial apicid  : 0
fpu             : yes
fpu_exception   : yes
cpuid level     : 1
wp              : yes
flags           : fpu vme de pse tsc msr pae mce cx8 apic sep mtrr pge 
mca cmov pat pse36 clflush mmx fxsr sse sse2 ht syscall nx mmxext 
fxsr_opt rdtscp lm 3dnowext 3dnow rep_good extd_apicid pni cx16 lahf_lm 
cmp_legacy svm extapic cr8_legacy 3dnowprefetch
bogomips        : 1999.98
TLB size        : 1024 4K pages
clflush size    : 64
cache_alignment : 64
address sizes   : 40 bits physical, 48 bits virtual
power management: ts fid vid ttp tm stc 100mhzsteps


lspci -v:

...
00:09.0 Bridge: nVidia Corporation MCP55 Ethernet (rev a3)
         Subsystem: nVidia Corporation Device cb84
         Flags: 66MHz, fast devsel, IRQ 21
         Memory at feaf5000 (32-bit, non-prefetchable) [size=4K]
         I/O ports at b080 [size=8]
         Memory at feafa000 (32-bit, non-prefetchable) [size=256]
         Memory at feaf4c00 (32-bit, non-prefetchable) [size=16]
         Capabilities: [44] Power Management version 2
         Capabilities: [70] MSI-X: Enable- Mask- TabSize=8
         Capabilities: [50] Message Signalled Interrupts: Mask+ 64bit+ 
Count=1/8 Enable-
         Capabilities: [6c] HyperTransport: MSI Mapping Enable- Fixed+ 

         Kernel driver in use: pci-stub 

         Kernel modules: forcedeth
...