[Xen-bugs] [Bug 1492] New: PCI Pass Through doesn't work after memory upgrade

[bugzilla-daemon@xxxxxxxxxxxxxxxxxxx]

http://bugzilla.xensource.com/bugzilla/show_bug.cgi?id=1492

           Summary: PCI Pass Through doesn't work after memory upgrade
           Product: Xen
           Version: unspecified
          Platform: x86-64
        OS/Version: Linux-2.6
            Status: NEW
          Severity: normal
          Priority: P3
         Component: Hypervisor
        AssignedTo: xen-bugs@xxxxxxxxxxxxxxxxxxx
        ReportedBy: au@xxxxxxx


Problem:

PCI Pass Through of a DVB-S card to a DomU worked fine for me until I have
upgraded memory from 16 gigs to 32 gigs. The card is still being detected
correctly but data seems not to be reaching the domU. The DVB scan utility just
reports "filter timeout".

Cross-checking this problem with a standard PC (x86_64, Intel) same software
setup) results in the same problem: With just 2 gigs everything runs fine but
with 4 gigs I am facing the same problems.

Surprisingly I can confirm the problem for dom0, too. Everything runs with 2
gigs (PC)/16 gigs (server) but it does not with 4 gigs (PC)/32 gigs (server).

I suspect some DMA problems here with "too much" memory. 'swiotlb=force' is
passed to the domU kernel.


Versions and Config:

Xen 3.3.2-rc7 (x86_64), Debian 5.0 (Lenny) Kernel 2.6.26-amd64-xen (PV,
dom0/domU)

Xen 3.4.2 tested as well, same problem.

Hardware (Server):

- 2x Intel Xeon 5140 (total of 4 cores)

# lspci
00:00.0 Host bridge: Intel Corporation 5000P Chipset Memory Controller Hub (rev
b1)
00:02.0 PCI bridge: Intel Corporation 5000 Series Chipset PCI Express x8 Port
2-3 (rev b1)
00:03.0 PCI bridge: Intel Corporation 5000 Series Chipset PCI Express x4 Port 3
(rev b1)
00:04.0 PCI bridge: Intel Corporation 5000 Series Chipset PCI Express x8 Port
4-5 (rev b1)
00:05.0 PCI bridge: Intel Corporation 5000 Series Chipset PCI Express x4 Port 5
(rev b1)
00:06.0 PCI bridge: Intel Corporation 5000 Series Chipset PCI Express x8 Port
6-7 (rev b1)
00:07.0 PCI bridge: Intel Corporation 5000 Series Chipset PCI Express x4 Port 7
(rev b1)
00:08.0 System peripheral: Intel Corporation 5000 Series Chipset DMA Engine
(rev b1)
00:10.0 Host bridge: Intel Corporation 5000 Series Chipset FSB Registers (rev
b1)
00:10.1 Host bridge: Intel Corporation 5000 Series Chipset FSB Registers (rev
b1)
00:10.2 Host bridge: Intel Corporation 5000 Series Chipset FSB Registers (rev
b1)
00:11.0 Host bridge: Intel Corporation 5000 Series Chipset Reserved Registers
(rev b1)
00:13.0 Host bridge: Intel Corporation 5000 Series Chipset Reserved Registers
(rev b1)
00:15.0 Host bridge: Intel Corporation 5000 Series Chipset FBD Registers (rev
b1)
00:16.0 Host bridge: Intel Corporation 5000 Series Chipset FBD Registers (rev
b1)
00:1c.0 PCI bridge: Intel Corporation 631xESB/632xESB/3100 Chipset PCI Express
Root Port 1 (rev 09)
00:1d.0 USB Controller: Intel Corporation 631xESB/632xESB/3100 Chipset UHCI USB
Controller #1 (rev 09)
00:1d.1 USB Controller: Intel Corporation 631xESB/632xESB/3100 Chipset UHCI USB
Controller #2 (rev 09)
00:1d.2 USB Controller: Intel Corporation 631xESB/632xESB/3100 Chipset UHCI USB
Controller #3 (rev 09)
00:1d.3 USB Controller: Intel Corporation 631xESB/632xESB/3100 Chipset UHCI USB
Controller #4 (rev 09)
00:1d.7 USB Controller: Intel Corporation 631xESB/632xESB/3100 Chipset EHCI
USB2 Controller (rev 09)
00:1e.0 PCI bridge: Intel Corporation 82801 PCI Bridge (rev d9)
00:1f.0 ISA bridge: Intel Corporation 631xESB/632xESB/3100 Chipset LPC
Interface Controller (rev 09)
00:1f.1 IDE interface: Intel Corporation 631xESB/632xESB IDE Controller (rev
09)
00:1f.2 SATA controller: Intel Corporation 631xESB/632xESB SATA AHCI Controller
(rev 09)
00:1f.3 SMBus: Intel Corporation 631xESB/632xESB/3100 Chipset SMBus Controller
(rev 09)
01:00.0 PCI bridge: Intel Corporation 6311ESB/6321ESB PCI Express Upstream Port
(rev 01)
01:00.3 PCI bridge: Intel Corporation 6311ESB/6321ESB PCI Express to PCI-X
Bridge (rev 01)
02:00.0 PCI bridge: Intel Corporation 6311ESB/6321ESB PCI Express Downstream
Port E1 (rev 01)
02:02.0 PCI bridge: Intel Corporation 6311ESB/6321ESB PCI Express Downstream
Port E3 (rev 01)
04:00.0 Ethernet controller: Intel Corporation 80003ES2LAN Gigabit Ethernet
Controller (Copper) (rev 01)
04:00.1 Ethernet controller: Intel Corporation 80003ES2LAN Gigabit Ethernet
Controller (Copper) (rev 01)
05:01.0 Network controller: Cologne Chip Designs GmbH ISDN network controller
[HFC-PCI] (rev 02)
05:02.0 Multimedia video controller: Conexant CX23880/1/2/3 PCI Video and Audio
Decoder (rev 05)
05:02.1 Multimedia controller: Conexant CX23880/1/2/3 PCI Video and Audio
Decoder [Audio Port] (rev 05)
05:02.2 Multimedia controller: Conexant CX23880/1/2/3 PCI Video and Audio
Decoder [MPEG Port] (rev 05)
05:02.4 Multimedia controller: Conexant CX23880/1/2/3 PCI Video and Audio
Decoder [IR Port] (rev 05)
07:00.0 PCI bridge: Intel Corporation 80333 Segment-A PCI Express-to-PCI
Express Bridge
07:00.2 PCI bridge: Intel Corporation 80333 Segment-B PCI Express-to-PCI
Express Bridge
08:0e.0 RAID bus controller: LSI Logic / Symbios Logic MegaRAID SAS
0b:00.0 PCI bridge: Integrated Device Technology, Inc. PES12N3A PCI Express
Switch (rev 04)
0c:00.0 PCI bridge: Integrated Device Technology, Inc. PES12N3A PCI Express
Switch (rev 04)
0c:01.0 PCI bridge: Integrated Device Technology, Inc. PES12N3A PCI Express
Switch (rev 04)
0d:00.0 Ethernet controller: Intel Corporation 82571EB Gigabit Ethernet
Controller (rev 06)
0d:00.1 Ethernet controller: Intel Corporation 82571EB Gigabit Ethernet
Controller (rev 06)
0e:00.0 Ethernet controller: Intel Corporation 82571EB Gigabit Ethernet
Controller (rev 06)
0e:00.1 Ethernet controller: Intel Corporation 82571EB Gigabit Ethernet
Controller (rev 06)
11:0c.0 VGA compatible controller: ATI Technologies Inc ES1000 (rev 02)


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