Re: pci pass-through on AMD architecture

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

Sry, prob informative to add that were running qemu-kvm-0.10.6 on a 
vanilla 2.6.30.4-0.1-default kernel.
-Jonas

Jonas Pfoh wrote:
> 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
> ...
>