Re: [Xen-devel] qemu-xen-dir + PCI passthrough = BOOM

["Zhang, Yang Z" <yang.z.zhang@xxxxxxxxx>]

Konrad Rzeszutek Wilk wrote on 2013-12-05:
> Hey,
> 
> I just started noticing it today - with qemu-xen (tip is commit
> b97307ecaad98360f41ea36cd9674ef810c4f8cf
>     xen_disk: mark ioreq as mapped before unmapping in error case)
> when I try to pass in a PCI device at bootup it blows up with:
> 
Hi, Konrad,

I cannot reproduce this issue with the same qemu-xen. Is there any special step 
needed?

Here is the NIC info:
08:00.0 Ethernet controller: Intel Corporation 82572EI Gigabit Ethernet 
Controller (Copper) (rev 06)
  Subsystem: Intel Corporation PRO/1000 PT Desktop Adapter
  Flags: bus master, fast devsel, latency 0, IRQ 34
  Memory at d2440000 (32-bit, non-prefetchable) [size=128K]
  Memory at d2420000 (32-bit, non-prefetchable) [size=128K]
  I/O ports at 5000 [size=32]
  Expansion ROM at d2400000 [disabled] [size=128K]
  Capabilities: [c8] Power Management version 2
  Capabilities: [d0] MSI: Enable+ Count=1/1 Maskable- 64bit+
  Capabilities: [e0] Express Endpoint, MSI 00
  Capabilities: [100] Advanced Error Reporting
  Capabilities: [140] Device Serial Number 00-1b-21-ff-ff-1e-8e-97
  Kernel driver in use: pciback
  Kernel modules: e1000e


BTW, is the fixing already in Qemu upstream?

> char device redirected to /dev/pts/2 (label serial0) qemu: hardware
> error: xen: failed to populate ram at 40050000 CPU #0: EAX=00000000
> EBX=00000000 ECX=00000000 EDX=00000633 ESI=00000000 EDI=00000000
> EBP=00000000 ESP=00000000 EIP=0000fff0 EFL=00000002 [-------] CPL=0 II=0
> A20=1 SMM=0 HLT=0 ES =0000 00000000 0000ffff 00009300 CS =f000 ffff0000
> 0000ffff 00009b00 SS =0000 00000000 0000ffff 00009300 DS =0000 00000000
> 0000ffff 00009300 FS =0000 00000000 0000ffff 00009300 GS =0000 00000000
> 0000ffff 00009300 LDT=0000 00000000 0000ffff 00008200 TR =0000 00000000
> 0000ffff 00008b00 GDT=     00000000 0000ffff IDT=     00000000 0000ffff
> CR0=60000010 CR2=00000000 CR3=00000000 CR4=00000000 DR0=00000000
> DR1=00000000 DR2=00000000 DR3=00000000 DR6=ffff0ff0 DR7=00000400
> EFER=0000000000000000 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80
> FPR0=0000000000000000 0000 FPR1=0000000000000000 0000
> FPR2=0000000000000000 0000 FPR3=0000000000000000 0000
> FPR4=0000000000000000 0000 FPR5=0000000000000000 0000
> FPR6=0000000000000000 0000 FPR7=0000000000000000 0000
> XMM00=00000000000000000000000000000000
> XMM01=00000000000000000000000000000000
> XMM02=00000000000000000000000000000000
> XMM03=00000000000000000000000000000000
> XMM04=00000000000000000000000000000000
> XMM05=00000000000000000000000000000000
> XMM06=00000000000000000000000000000000
> XMM07=00000000000000000000000000000000 CPU #1: EAX=00000000 EBX=00000000
> ECX=00000000 EDX=00000633 ESI=00000000 EDI=00000000 EBP=00000000
> ESP=00000000 EIP=0000fff0 EFL=00000002 [-------] CPL=0 II=0 A20=1 SMM=0
> HLT=1 ES =0000 00000000 0000ffff 00009300 CS =f000 ffff0000 0000ffff
> 00009b00
> 
> 
> ...
> -bash-4.1# xl dmesg | tail
> [ 2788.038463] xen_pciback: vpci(d3) [2013-12-04 19:43:40] System
> requested SeaBIOS
> : 0000:01:00.1: (d3) [2013-12-04 19:43:40] CPU speed is 3093 MHz
> assign to virtua(d3) [2013-12-04 19:43:40] Relocating guest memory for
> lowmem MMIO space disabled l slot 0 [ 2788.076396] device vif3.0
> entered promiscuous mode
> 
> If I don't have 'pci=' stanze in my guest config it boots just fine.
> 
> -bash-4.1# more /vm.cfg builder='hvm' disk = [
> 'file:/mnt/lab/latest/root_image.iso,hdc:cdrom,r'] memory=1024 boot="d"
> vcpus=2 serial="pty" vnclisten="0.0.0.0" name="latest" vif = [
> 'mac=00:0F:4B:00:00:68, bridge=switch' ] on_crash="preserve"
> pci=["01:00.0"]
> 
> Any ideas?
> 
> This is with today's Xen and 3.13-rc2. The device in question is
> -bash-4.1# lspci -s 01:00.0 -v
> 01:00.0 Ethernet controller: Intel Corporation 82576 Gigabit Network
> Connection (rev 01)
>         Subsystem: Intel Corporation Gigabit ET Dual Port Server Adapter
>         Flags: fast devsel, IRQ 16 Memory at fbc20000 (32-bit,
>         non-prefetchable) [disabled] [size=128K] Memory at fb800000
>         (32-bit, non-prefetchable) [disabled] [size=4M] I/O ports at
>         e020 [disabled] [size=32] Memory at fbc44000 (32-bit,
>         non-prefetchable) [disabled] [size=16K] Expansion ROM at
>         fb400000 [disabled] [size=4M] Capabilities: [40] Power
>         Management version 3 Capabilities: [50] MSI: Enable- Count=1/1
>         Maskable+ 64bit+ Capabilities: [70] MSI-X: Enable- Count=10
>         Masked- Capabilities: [a0] Express Endpoint, MSI 00
>         Capabilities: [100] Advanced Error Reporting Capabilities: [140]
>         Device Serial Number 00-1b-21-ff-ff-45-d9-ac Capabilities: [150]
>         Alternative Routing-ID Interpretation (ARI) Capabilities: [160]
>         Single Root I/O Virtualization (SR-IOV) Kernel driver in use:
>         pciback Kernel modules: igb
> 
> Oh and of course it boots with the traditional QEMU.
> 
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Best regards,
Yang



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