Re: [Xen-devel] About Xen bridged pci devices and suspend/resume for the X10SAE motherboard (SuperMicro)

["M. Ivanov" <mihail.ivanov93@xxxxxxxxx>]

Hello,

I've experimented with my X10SAE and I think the problem with being
unable to resume after suspending to RAM has something to do with the
PCI Bridge violating the spec by trying to DMA from another address,
since I got a DMAR error about DMA access on address 05:00.0(but in the
bios event log it says Bus06), also the Tundra PCI Bridge is on address
04:00.0. (so like your case with address 7 and 8, but mine's 4 and 5),
btw adding a PCI-E vga seems to change the addresses.

When I disable IOMMU+Xen it works fine, so I mostly sure it's that.
Though I've tried running just Linux with the iommu param on and I
didn't get an error when sleeping/resuming. But I haven't tried doing a
pass-through with it

I've read in a previous thread about a patch of yours for the X10SAE
problem. Which version of Xen can I use it on?(I am currently tinkering
with 4.4.3-RELEASE).

Also I take it - I need to use hack.c to tell xen to create the fake
device,(in my case 05:00.0) and to link it with 04:00.0? But how do I
get that file to compile? Since I don't have a makefile/etc. for it.

Also, can't I just disable the PCI Tundra bridge somehow? And what about
phantom pci and the pciback-hide? Can they help?

I've read about problems regarding the Asmedia controller, so I've
disabled it from the bios, but that didn't help at all.


As for my Xen crash log

DMAR:[DMA Write] Request device [05:00.0] fault addr Can't remember it
DMAR:[fault reason 02] Present bit in context entry is clear

Here is my tree:

00:00.0 Host bridge: Intel Corporation Xeon E3-1200 v3 Processor DRAM
Controller (rev 06)
00:01.0 PCI bridge: Intel Corporation Xeon E3-1200 v3/4th Gen Core
Processor PCI Express x16 Controller (rev 06)
00:02.0 VGA compatible controller: Intel Corporation Xeon E3-1200 v3
Processor Integrated Graphics Controller (rev 06)
00:03.0 Audio device: Intel Corporation Xeon E3-1200 v3/4th Gen Core
Processor HD Audio Controller (rev 06)
00:14.0 USB controller: Intel Corporation 8 Series/C220 Series Chipset
Family USB xHCI (rev 05)
00:16.0 Communication controller: Intel Corporation 8 Series/C220 Series
Chipset Family MEI Controller #1 (rev 04)
00:16.3 Serial controller: Intel Corporation 8 Series/C220 Series
Chipset Family KT Controller (rev 04)
00:19.0 Ethernet controller: Intel Corporation Ethernet Connection
I217-LM (rev 05)
00:1a.0 USB controller: Intel Corporation 8 Series/C220 Series Chipset
Family USB EHCI #2 (rev 05)
00:1b.0 Audio device: Intel Corporation 8 Series/C220 Series Chipset
High Definition Audio Controller (rev 05)
00:1c.0 PCI bridge: Intel Corporation 8 Series/C220 Series Chipset
Family PCI Express Root Port #1 (rev d5)
00:1c.3 PCI bridge: Intel Corporation 8 Series/C220 Series Chipset
Family PCI Express Root Port #4 (rev d5)
00:1c.5 PCI bridge: Intel Corporation 8 Series/C220 Series Chipset
Family PCI Express Root Port #6 (rev d5)
00:1c.6 PCI bridge: Intel Corporation 8 Series/C220 Series Chipset
Family PCI Express Root Port #7 (rev d5)
00:1d.0 USB controller: Intel Corporation 8 Series/C220 Series Chipset
Family USB EHCI #1 (rev 05)
00:1f.0 ISA bridge: Intel Corporation C226 Series Chipset Family Server
Advanced SKU LPC Controller (rev 05)
00:1f.2 SATA controller: Intel Corporation 8 Series/C220 Series Chipset
Family 6-port SATA Controller 1 [AHCI mode] (rev 05)
00:1f.3 SMBus: Intel Corporation 8 Series/C220 Series Chipset Family
SMBus Controller (rev 05)
00:1f.6 Signal processing controller: Intel Corporation 8 Series Chipset
Family Thermal Management Controller (rev 05)
01:00.0 VGA compatible controller: Advanced Micro Devices, Inc.
[AMD/ATI] Cayman PRO [Radeon HD 6950]
01:00.1 Audio device: Advanced Micro Devices, Inc. [AMD/ATI]
Cayman/Antilles HDMI Audio [Radeon HD 6900 Series]
03:00.0 Ethernet controller: Intel Corporation I210 Gigabit Network
Connection (rev 03)
04:00.0 PCI bridge: Tundra Semiconductor Corp. Device 8113 (rev 01)
05:03.0 FireWire (IEEE 1394): Texas Instruments TSB43AB22A
IEEE-1394a-2000 Controller (PHY/Link) [iOHCI-Lynx]
06:00.0 USB controller: Renesas Technology Corp. uPD720202 USB 3.0 Host
Controller (rev 02)

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