linux-kernel - Re: Linux 2.6.27-rc5: System boot regression caused by commit a2bd7274b47124d2fc4dfdb8c0591f545ba749dd

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Date:	Sat, 30 Aug 2008 09:05:08 -0700
From:	"Yinghai Lu" <yhlu.kernel@...il.com>
To:	"Rafael J. Wysocki" <rjw@...k.pl>
Cc:	"Linus Torvalds" <torvalds@...ux-foundation.org>,
	"Linux Kernel Mailing List" <linux-kernel@...r.kernel.org>,
	"Jeff Garzik" <jeff@...zik.org>, "Tejun Heo" <htejun@...il.com>,
	"Ingo Molnar" <mingo@...e.hu>,
	"David Witbrodt" <dawitbro@...global.net>,
	"Andrew Morton" <akpm@...ux-foundation.org>,
	"Kernel Testers" <kernel-testers@...r.kernel.org>
Subject: Re: Linux 2.6.27-rc5: System boot regression caused by commit a2bd7274b47124d2fc4dfdb8c0591f545ba749dd

On Sat, Aug 30, 2008 at 6:32 AM, Rafael J. Wysocki <rjw@...k.pl> wrote:
> On Saturday, 30 of August 2008, Yinghai Lu wrote:
>> On Fri, Aug 29, 2008 at 5:20 PM, Yinghai Lu <yhlu.kernel@...il.com> wrote:
>> > On Fri, Aug 29, 2008 at 5:08 PM, Linus Torvalds
>> > <torvalds@...ux-foundation.org> wrote:
>> >>
>> >>
>> >> On Fri, 29 Aug 2008, Yinghai Lu wrote:
>> >>> >
>> >>> > http://www.sisk.pl/kernel/debug/mainline/2.6.27-rc5/broken.log
>> >>>
>> >>> pci 0000:00:00.0: BAR has MMCONFIG at e0000000-ffffffff
>> >>
>> >> And that seems utter crap to begin with.
>> >>
>> >>        PCI: Using MMCONFIG at e0000000 - efffffff
>> >>
>> >> Where did it get that bogus "ffffffff" end address?
>> >>
>> >> Anyway, that whole MMCONFIG/BAR thing was totally broken to begin with,
>> >> and it's reverted now in my tree, so I guess it doesn't much matter.
>> >
>> > we need to handle it. otherwise if the BAR go first, and it will stop
>> > other BARs to be registered...
>> >
>> > a quirk should do the work....
>> >
>> > Rafael, can you send out lspci -tv and lspci --vvxxx too.
>>
>> cat /proc/iomem please.
>
> http://www.sisk.pl/kernel/debug/mainline/2.6.27-rc5/lspci-tv.txt
> http://www.sisk.pl/kernel/debug/mainline/2.6.27-rc5/lspci-vvxxx.txt
> http://www.sisk.pl/kernel/debug/mainline/2.6.27-rc5/proc_iomem.txt
>

00:00.0 Host bridge: ATI Technologies Inc RD790 Northbridge only dual
slot PCI-e_GFX and HT3 K8 part
	Subsystem: ATI Technologies Inc RD790 Northbridge only dual slot
PCI-e_GFX and HT3 K8 part
	Control: I/O- Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr-
Stepping- SERR- FastB2B-
	Status: Cap+ 66MHz+ UDF- FastB2B- ParErr- DEVSEL=medium >TAbort-
<TAbort- <MAbort+ >SERR- <PERR-
	Latency: 0
	Region 3: Memory at <ignored> (64-bit, non-prefetchable)
	Capabilities: [c4] HyperTransport: Slave or Primary Interface
		Command: BaseUnitID=0 UnitCnt=12 MastHost- DefDir- DUL-
		Link Control 0: CFlE- CST- CFE- <LkFail- Init+ EOC- TXO- <CRCErr=0
IsocEn- LSEn- ExtCTL- 64b-
		Link Config 0: MLWI=16bit DwFcIn- MLWO=16bit DwFcOut- LWI=16bit
DwFcInEn- LWO=16bit DwFcOutEn-
		Link Control 1: CFlE- CST- CFE- <LkFail+ Init- EOC+ TXO+ <CRCErr=0
IsocEn- LSEn- ExtCTL- 64b-
		Link Config 1: MLWI=8bit DwFcIn- MLWO=8bit DwFcOut- LWI=8bit
DwFcInEn- LWO=8bit DwFcOutEn-
		Revision ID: 3.00
		Link Frequency 0: [b]
		Link Error 0: <Prot- <Ovfl- <EOC- CTLTm-
		Link Frequency Capability 0: 200MHz+ 300MHz- 400MHz+ 500MHz- 600MHz+
800MHz+ 1.0GHz+ 1.2GHz+ 1.4GHz- 1.6GHz- Vend-
		Feature Capability: IsocFC- LDTSTOP+ CRCTM- ECTLT- 64bA- UIDRD-
		Link Frequency 1: 200MHz
		Link Error 1: <Prot- <Ovfl- <EOC- CTLTm-
		Link Frequency Capability 1: 200MHz- 300MHz- 400MHz- 500MHz- 600MHz-
800MHz- 1.0GHz- 1.2GHz- 1.4GHz- 1.6GHz- Vend-
		Error Handling: PFlE- OFlE- PFE- OFE- EOCFE- RFE- CRCFE- SERRFE- CF-
RE- PNFE- ONFE- EOCNFE- RNFE- CRCNFE- SERRNFE-
		Prefetchable memory behind bridge Upper: 00-00
		Bus Number: 00
	Capabilities: [40] HyperTransport: Retry Mode
	Capabilities: [54] HyperTransport: UnitID Clumping
	Capabilities: [9c] HyperTransport: #1a
00: 02 10 56 59 06 00 30 22 00 00 00 06 00 00 00 00
10: 00 00 00 00 00 00 00 00 00 00 00 00 04 00 00 e0

so bar3 of 00:00.0 has oxe0000000 - 0xffffffff
and request_resource failed, so
	Region 3: Memory at <ignored> (64-bit, non-prefetchable)

BIOS should hide that region, and because AMD quad core has MMCONFIG
set in NB MSR already.

please try to apply attached patches, and boot with "debug initcall_debug"

applying sequence:

split_e820_reserve=.patch
pci_res_print_out.patch
split_e820_reserve_xx1.patch
insert_resource_debug.patch
pci_mmconf.patch

please send out
dmesg -s 262144 > x.txt
cat /proc/iomem

need to verify if we need quirk to clear that resource.

YH

View attachment "pci_mmconf.patch" of type "text/x-patch" (1720 bytes)

View attachment "pci_res_print_out.patch" of type "text/x-patch" (2424 bytes)

View attachment "split_e820_reserve.patch" of type "text/x-patch" (3574 bytes)

View attachment "split_e820_reserve_xx1.patch" of type "text/x-patch" (6592 bytes)

View attachment "insert_resource_debug.patch" of type "text/x-patch" (3148 bytes)