[Xen-bugs] [Bug 1581] New: Ethernet modules craches in domU with pci passthrough

[bugzilla-daemon@xxxxxxxxxxxxxxxxxxx]

http://bugzilla.xensource.com/bugzilla/show_bug.cgi?id=1581

           Summary: Ethernet modules craches in domU with pci passthrough
           Product: Xen
           Version: unstable
          Platform: x86-64
        OS/Version: Linux-2.6
            Status: NEW
          Severity: blocker
          Priority: P2
         Component: Linux-pv_ops domU
        AssignedTo: xen-bugs@xxxxxxxxxxxxxxxxxxx
        ReportedBy: andrey@xxxxxxxxxx


This is error part of dmesg from domU (details of system below):

udev: starting version 146
Broadcom NetXtreme II Gigabit Ethernet Driver bnx2 v2.0.1 (May 6, 2009)
bnx2 0000:02:00.0: enabling device (0000 -> 0002)
  alloc irq_desc for 32 on node 0
  alloc kstat_irqs on node 0
------------[ cut here ]------------
Kernel BUG at ffffffff8044e6f5 [verbose debug info unavailable]
invalid opcode: 0000 [#1] SMP 
last sysfs file: /sys/devices/xen/vbd-51713/block/xvda1/removable
CPU 0 
Modules linked in: bnx2(+)
Pid: 1271, comm: modprobe Not tainted 2.6.31-xen-r10 #10 
RIP: e030:[<ffffffff8044e6f5>]  [<ffffffff8044e6f5>] 0xffffffff8044e6f5
RSP: e02b:ffff8801b3d19cc8  EFLAGS: 00010216
RAX: ffff8801b42ff840 RBX: 0000000000000020 RCX: 0000000000000000
RDX: 0000000000007900 RSI: 0000000000000000 RDI: 0000000000000020
RBP: 0000000000000001 R08: 00000000ffffffff R09: 0000000000007900
R10: 00000b0b00000000 R11: 0000000000000020 R12: 00000000fffffff4
R13: ffff8801b5047090 R14: ffff8801b535c000 R15: ffff8801b5047000
FS:  00007fcd29a366f0(0000) GS:ffffc90000000000(0000) knlGS:0000000000000000
CS:  e033 DS: 0000 ES: 0000 CR0: 000000008005003b
CR2: 00007fcbb162600f CR3: 00000001b3056000 CR4: 0000000000002660
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
Process modprobe (pid: 1271, threadinfo ffff8801b3d18000, task
ffff8801b4be1d60)
Stack:
ffff8801b5047000 ffffffff8048f214 ffff8801b535c000 20ffffff80490283
<0> ffff8801b5047000 ffffffff803ea39f ffffffffa000c530 ffff8801b5047000
<0> ffff8801b535c580 ffffffff803ea404 ffffffffa000c590 ffffffffa0009e25
Call Trace:
[<ffffffff8048f214>] ? 0xffffffff8048f214
[<ffffffff803ea39f>] ? 0xffffffff803ea39f
[<ffffffff803ea404>] ? 0xffffffff803ea404
[<ffffffffa0009e25>] ? 0xffffffffa0009e25
[<ffffffff802ca492>] ? 0xffffffff802ca492
[<ffffffff8030c7ce>] ? 0xffffffff8030c7ce
[<ffffffff803eb032>] ? 0xffffffff803eb032
[<ffffffff803eb7f1>] ? 0xffffffff803eb7f1
[<ffffffff80444b7f>] ? 0xffffffff80444b7f
[<ffffffff80444c69>] ? 0xffffffff80444c69
[<ffffffff80444c1a>] ? 0xffffffff80444c1a
[<ffffffff80444467>] ? 0xffffffff80444467
[<ffffffff80443e2d>] ? 0xffffffff80443e2d
[<ffffffff80444f03>] ? 0xffffffff80444f03
[<ffffffffa0010000>] ? 0xffffffffa0010000
[<ffffffff803ebc29>] ? 0xffffffff803ebc29
[<ffffffffa0010000>] ? 0xffffffffa0010000
[<ffffffff80207051>] ? 0xffffffff80207051
[<ffffffff80258fcd>] ? 0xffffffff80258fcd
[<ffffffff802093f8>] ? 0xffffffff802093f8
[<ffffffff80209390>] ? 0xffffffff80209390
Code: 44 f8 ff 41 89 c6 3b 05 ea 71 20 00 0f 82 b1 fd ff ff 48 83 c4 68 31 c0
5b 5d 41 5c 41 5d 41 5e 41 5f c3 53 83 ff 0f 89 fb 76 04 <0f> 0b eb fe 7e 55 e8
88 f1 e1 ff 48 85 c0 74 10 48 8b 40 38 48 
RIP  [<ffffffff8044e6f5>] 0xffffffff8044e6f5
RSP <ffff8801b3d19cc8>
---[ end trace c14fe0c5cc1cd90d ]---


I use in dom0 Gentoo linux with kernel 2.6.31-xen-r10 with 
CONFIG_XEN_PCIDEV_BACKEND_PASS=y
The same kernel in domU with frontends options enabled instead of backends

Xen version: xen-3.4.2-r1 (with xsm compile option enabled - gentoo specific)
xen linux # xm info
host                   : xen
release                : 2.6.31-xen-r10
version                : #4 SMP Tue Jan 12 20:59:12 IST 2010
machine                : x86_64
nr_cpus                : 8
nr_nodes               : 1
cores_per_socket       : 4
threads_per_core       : 1
cpu_mhz                : 2128
hw_caps                :
bfebfbff:28100800:00000000:00000340:009ce3bd:00000000:00000001:00000000
virt_caps              : hvm hvm_directio
total_memory           : 8182
free_memory            : 14
node_to_cpu            : node0:0-7
node_to_memory         : node0:14
xen_major              : 3
xen_minor              : 4
xen_extra              : .2
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 4.3.4 (Gentoo 4.3.4 p1.0, pie-10.1.5) 
cc_compile_by          : root
cc_compile_domain      : (none)
cc_compile_date        : Tue Jan 12 21:18:45 IST 2010
xend_config_format     : 4


I have Dell R710 with 2 dual NICs Broadcom Corporation NetXtreme II BCM5709
Gigabit Ethernet (rev 20) (4 ports summary)

This is my grub.conf options:

title Xen 3.4.2 / Gentoo Linux 2.6.31-gentoo-r6-dom0
root (hd0,0)
kernel /xen.gz iommu=1 msi=1
module /vmlinuz.xen root=/dev/sda3 xencons=xvc pciback.hide=(02:00.0)(02:00.1)

This is my domU config:
xen linux # cat /home/VM/proxy/proxy.cfg 
#kernel = "/boot/vmlinuz-2.6.30.10"
bootloader = "/usr/bin/pygrub"
name="proxy"
builder='linux'
memory = '7000'
vcpus = '8'
disk = ['tap:aio:/home/VM/proxy/proxy.img,xvda1,w']
root = "/dev/xvda1"
hostname="proxy"
vif = [ 'bridge=eth0', 'bridge=eth1' ]
extra="vga=791 xencons=xvc"
pci=['02:00.0','02:00.1']

In dom0:
xen xen # dmesg | grep pciback
pciback 0000:02:00.0: seizing device
pciback 0000:02:00.1: seizing device
pciback 0000:02:00.1: PCI INT B -> GSI 42 (level, low) -> IRQ 42
pciback 0000:02:00.1: PCI INT B disabled
pciback 0000:02:00.0: PCI INT A -> GSI 32 (level, low) -> IRQ 32
pciback 0000:02:00.0: PCI INT A disabled
pciback 0000:02:00.0: enabling permissive mode configuration space accesses!
pciback 0000:02:00.0: permissive mode is potentially unsafe!
pciback 0000:02:00.1: enabling permissive mode configuration space accesses!
pciback 0000:02:00.1: permissive mode is potentially unsafe!
pciback 0000:02:00.0: enabling device (0000 -> 0002)
pciback 0000:02:00.0: PCI INT A -> GSI 32 (level, low) -> IRQ 32

In domU
proxy ~ # dmesg | grep pcifront
pcifront pci-0: Installing PCI frontend
pcifront pci-0: Creating PCI Frontend Bus 0000:02


I tried other cards with other modules and is always broken with same crach
error.


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