[Xen-users] PCI passtrough for e1000e network device not working (Debian/Jessie, Xen 4.3, Linux kernel 3.12)

[Jonas Meurer <jonas@xxxxxxxxxxxxxxx>]

Hello,

I fail to configure Xen the way that it passes a network device through 
to a VM (on Debian/Jessie, Xen 4.3, Linux kernel 3.12)
This is the network device in question:

# lspci -v -s 0000:03:00.0
03:00.0 Ethernet controller: Intel Corporation 82574L Gigabit Network 
Connection
[...]
Kernel driver in use: e1000e

Dynamic assignment seems to work, but passthrough works only halfways:

# echo 0000:03:00.0 > /sys/bus/pci/drivers/e1000e/unbind
# echo 0000:03:00.0 > /sys/bus/pci/drivers/pciback/new_slot
# echo 0000:03:00.0 > /sys/bus/pci/drivers/pciback/bind
# lspci -v -s 0000:03:00.0
03:00.0 Ethernet controller: Intel Corporation 82574L Gigabit Network 
Connection
[...]
Kernel driver in use: pciback
# xl pci-assignable-list
0000:03:00.0

Afterwards I do see the pci device inside the DomU (Debian/Jessie, Linux 
Kernel 3.12):
# lspci
00:00.0 Ethernet controller: Intel Corporation 82574L Gigabit Network 
Connection
# lspci -v -s 0000:00:00.0
00:00.0 Ethernet controller: Intel Corporation 82574L Gigabit Network 
Connection
[...]
Kernel driver in use: e1000e

But the device is not recognized as network device, /proc/net/dev lists 
only the vif configured in DomU-Config.
I see the following traceback in dmesg inside DomU:

[    1.148546] xenbus_probe_frontend: Device with no driver: 
device/vbd/51712
[    1.148547] xenbus_probe_frontend: Device with no driver: 
device/vif/0
[    1.148548] xenbus_probe_frontend: Device with no driver: 
device/pci/0
[...]
[    1.206122] pcifront pci-0: Installing PCI frontend
[...]
[    1.209670] pcifront pci-0: Creating PCI Frontend Bus 0000:00
[    1.209709] pcifront pci-0: PCI host bridge to bus 0000:00
[    1.209712] pci_bus 0000:00: root bus resource [io  0x0000-0xffff]
[    1.209713] pci_bus 0000:00: root bus resource [mem 
0x00000000-0x3fffffffffff]
[    1.209716] pci_bus 0000:00: root bus resource [bus 00-ff]
[    1.209888] pci 0000:00:00.0: [8086:10d3] type 00 class 0x020000
[    1.210001] pci 0000:00:00.0: reg 0x10: [mem 0xdfbc0000-0xdfbdffff]
[    1.210066] pci 0000:00:00.0: reg 0x14: [mem 0xdfb00000-0xdfb7ffff]
[    1.210134] pci 0000:00:00.0: reg 0x18: [io  0x7000-0x701f]
[    1.210195] pci 0000:00:00.0: reg 0x1c: [mem 0xdfbe0000-0xdfbe3fff]
[    1.223406] xen_netfront: Initialising Xen virtual ethernet driver
[    1.227416] pcifront pci-0: claiming resource 0000:00:00.0/0
[    1.227421] pcifront pci-0: claiming resource 0000:00:00.0/1
[    1.227422] pcifront pci-0: claiming resource 0000:00:00.0/2
[    1.227424] pcifront pci-0: claiming resource 0000:00:00.0/3
[...]
[    1.308278] e1000e: Intel(R) PRO/1000 Network Driver - 2.3.2-k
[    1.308280] e1000e: Copyright(c) 1999 - 2013 Intel Corporation.
[    1.308363] e1000e 0000:00:00.0: enabling device (0000 -> 0002)
[    1.308536] e1000e 0000:00:00.0: Xen PCI mapped GSI40 to IRQ28
[    1.309023] e1000e 0000:00:00.0: Interrupt Throttling Rate (ints/sec) 
set to dynamic conservative mode
[    1.309462] BUG: unable to handle kernel paging request at 
ffffc900000a600c
[    1.309472] IP: [<ffffffff812ab4be>] pci_enable_msix+0x30e/0x3e0
[    1.309480] PGD ec5f067 PUD ec60067 PMD ec61067 PTE 80100000dfbe0465
[    1.309489] Oops: 0003 [#1] SMP
[    1.309494] Modules linked in: e1000e(+) ptp pps_core xen_netfront(+) 
xen_blkfront(+) xen_pcifront
[    1.309503] CPU: 0 PID: 72 Comm: modprobe Not tainted 3.12-1-amd64 #1 
Debian 3.12.9-1
[    1.309508] task: ffff88000c2cf840 ti: ffff880003806000 task.ti: 
ffff880003806000
[    1.309512] RIP: e030:[<ffffffff812ab4be>]  [<ffffffff812ab4be>] 
pci_enable_msix+0x30e/0x3e0
[    1.309516] RSP: e02b:ffff880003807b78  EFLAGS: 00010286
[    1.309519] RAX: 000000000000000c RBX: ffff88000c1a7140 RCX: 
0000000000000005
[    1.309523] RDX: ffffc900000a600c RSI: 0000000000000001 RDI: 
ffff88000c200200
[    1.309526] RBP: ffff880003ff5a00 R08: ffff88000c209c00 R09: 
ffff88000e800050
[    1.309529] R10: 000000000000001f R11: 0000000000000044 R12: 
ffff88000c11f000
[    1.309532] R13: 0000000000000000 R14: 0000000000000000 R15: 
000000000000000c
[    1.309539] FS:  00007f6dcf53b700(0000) GS:ffff88000fc00000(0000) 
knlGS:0000000000000000
[    1.309543] CS:  e033 DS: 0000 ES: 0000 CR0: 0000000080050033
[    1.309545] CR2: ffff8000006fdf00 CR3: 0000000003ff3000 CR4: 
0000000000042660
[    1.309549] Stack:
[    1.309552]  ffff88000c11f868 00000000c0040800 ffff880003880800 
ffffffffa005a100
[    1.309557]  ffff88000c11f098 0000000000000001 ffff880003880000 
ffff880003880800
[    1.309562]  ffffffffa00519bf ffff88000c11f000 ffffffffa0055fc5 
ffff880003880800
[    1.309568] Call Trace:
[    1.309578]  [<ffffffffa00519bf>] ? 
e1000e_set_interrupt_capability+0xef/0x120 [e1000e]
[    1.309586]  [<ffffffffa0055fc5>] ? e1000_probe+0x3a5/0xe30 [e1000e]
[    1.309594]  [<ffffffff81293264>] ? local_pci_probe+0x34/0x60
[    1.309599]  [<ffffffff81294582>] ? pci_device_probe+0x112/0x120
[    1.309605]  [<ffffffff81345bf8>] ? driver_probe_device+0x68/0x220
[    1.309609]  [<ffffffff81345e6b>] ? __driver_attach+0x7b/0x80
[    1.309613]  [<ffffffff81345df0>] ? __device_attach+0x40/0x40
[    1.309618]  [<ffffffff81343e73>] ? bus_for_each_dev+0x53/0x90
[    1.309623]  [<ffffffff81345368>] ? bus_add_driver+0x1e8/0x290
[    1.309628]  [<ffffffff81346406>] ? driver_register+0x56/0xd0
[    1.309631]  [<ffffffffa0066000>] ? 0xffffffffa0065fff
[    1.309637]  [<ffffffff8100210a>] ? do_one_initcall+0x10a/0x160
[    1.309642]  [<ffffffff810c01f1>] ? load_module+0x1c11/0x24c0
[    1.309647]  [<ffffffff810bcf40>] ? symbol_put_addr+0x30/0x30
[    1.309652]  [<ffffffff810c0bcd>] ? SyS_finit_module+0x6d/0x70
[    1.309658]  [<ffffffff81498fb9>] ? system_call_fastpath+0x16/0x1b
[    1.309661] Code: 0c 89 02 8b 7b 0c e8 02 c9 df ff 49 63 c7 48 03 43 
28 8b 30 0f b7 43 02 89 73 08 83 ce 01 c1 e0 04 83 c0 0c 48 63 d0 48 03 
53 28 <89> 32 48 8b 43 18 41 83 c6 01 48 39 04 24 89 73 08 48 8d 58 e8
[    1.309697] RIP  [<ffffffff812ab4be>] pci_enable_msix+0x30e/0x3e0
[    1.309702]  RSP <ffff880003807b78>
[    1.309704] CR2: ffffc900000a600c
[    1.309708] ---[ end trace 14e095cf15d42207 ]---


Any idea what I'm missing? Or is this a known bug?

Kind regards,
 jonas


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