lkml.org 
[lkml]   [2012]   [Oct]   [1]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH] Prevent AMD MCE oops on multi-server system
On 01/10/2012 18:06, Borislav Petkov wrote:
> On Mon, Oct 01, 2012 at 02:42:05PM +0800, Daniel J Blueman wrote:
>> When booting on a federated multi-server system, the processor Northbridge
>> lookup returns NULL; add guards to prevent this causing an oops.
> Interesting.
>
> What does lspci say on those systems?
>
> Thanks.
As NumaConnect remote-server I/O is in a pre-release stage, we only
expose I/O on the first (root) server, so the lspci on eg my three
server, single-socket C32 development system is uninteresting [1].

We map MMCONFIG addresses in the global address map to the respective
server, which is how we access the processor Northbridges in the
bootloader before Linux loads, so they are accessible and get enumerated
when we enable remote I/O with the ACPI SSDT we generate, however since
the AMD APIC IDs (hence NB IDs) are only 8-bit, the present
amd_get_nb_id will produce duplicate NB IDs at best (but in this case,
as we disable I/O routing, there is no structure); later, we may propose
to using eg bits 23:8 for the server ID. That's another discussion though.

The minimal patch at least corrects the oops regression which didn't
happen in earlier kernels.

Thanks!
Daniel

--- [1]

root@oct1:~# lspci
00:00.0 Host bridge: ATI Technologies Inc RD890 Northbridge only dual
slot (2x16) PCI-e GFX Hydra part (rev 02)
00:00.2 Generic system peripheral [0806]: ATI Technologies Inc Device 5a23
00:02.0 PCI bridge: ATI Technologies Inc RD890 PCI to PCI bridge (PCI
express gpp port B)
00:04.0 PCI bridge: ATI Technologies Inc RD890 PCI to PCI bridge (PCI
express gpp port D)
00:05.0 PCI bridge: ATI Technologies Inc RD890 PCI to PCI bridge (PCI
express gpp port E)
00:06.0 PCI bridge: ATI Technologies Inc RD890 PCI to PCI bridge (PCI
express gpp port F)
00:11.0 SATA controller: ATI Technologies Inc SB700/SB800 SATA
Controller [AHCI mode]
00:12.0 USB Controller: ATI Technologies Inc SB700/SB800 USB OHCI0
Controller
00:12.1 USB Controller: ATI Technologies Inc SB700 USB OHCI1 Controller
00:12.2 USB Controller: ATI Technologies Inc SB700/SB800 USB EHCI Controller
00:13.0 USB Controller: ATI Technologies Inc SB700/SB800 USB OHCI0
Controller
00:13.1 USB Controller: ATI Technologies Inc SB700 USB OHCI1 Controller
00:13.2 USB Controller: ATI Technologies Inc SB700/SB800 USB EHCI Controller
00:14.0 SMBus: ATI Technologies Inc SBx00 SMBus Controller (rev 3d)
00:14.1 IDE interface: ATI Technologies Inc SB700/SB800 IDE Controller
00:14.2 Audio device: ATI Technologies Inc SBx00 Azalia (Intel HDA)
00:14.3 ISA bridge: ATI Technologies Inc SB700/SB800 LPC host controller
00:14.4 PCI bridge: ATI Technologies Inc SBx00 PCI to PCI Bridge
00:14.5 USB Controller: ATI Technologies Inc SB700/SB800 USB OHCI2
Controller
00:18.0 Host bridge: Advanced Micro Devices [AMD] Family 10h Processor
HyperTransport Configuration
00:18.1 Host bridge: Advanced Micro Devices [AMD] Family 10h Processor
Address Map
00:18.2 Host bridge: Advanced Micro Devices [AMD] Family 10h Processor
DRAM Controller
00:18.3 Host bridge: Advanced Micro Devices [AMD] Family 10h Processor
Miscellaneous Control
00:18.4 Host bridge: Advanced Micro Devices [AMD] Family 10h Processor
Link Control
00:19.0 Host bridge: Device 1b47:0601 (rev 02)
00:19.1 Host bridge: Device 1b47:0602 (rev 02)
01:00.0 VGA compatible controller: ATI Technologies Inc Device 68ba
01:00.1 Audio device: ATI Technologies Inc Juniper HDMI Audio [Radeon HD
5700 Series]
02:00.0 USB Controller: NEC Corporation uPD720200 USB 3.0 Host
Controller (rev 03)
03:00.0 Ethernet controller: Intel Corporation 82574L Gigabit Network
Connection
04:00.0 Ethernet controller: Intel Corporation 82574L Gigabit Network
Connection
05:06.0 VGA compatible controller: ASPEED Technology, Inc. ASPEED
Graphics Family (rev 10)

--
Daniel J Blueman
Principal Software Engineer, Numascale Asia



\
 
 \ /
  Last update: 2012-10-03 07:41    [W:0.095 / U:0.252 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site