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From: Thomas Gleixner <tglx@linutronix.de>
To: "Stefan Bühler" <stefan.buehler@tik.uni-stuttgart.de>,
	sean.v.kelley@linux.intel.com
Cc: bhelgaas@google.com, bp@alien8.de, corbet@lwn.net,
	kar.hin.ong@ni.com, linux-doc@vger.kernel.org,
	linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org,
	mingo@redhat.com, sassmann@kpanic.de, x86@kernel.org,
	Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Subject: Re: boot interrupt quirk (also in 4.19.y) breaks serial ports (was: [PATCH v2 0/2] pci: Add boot interrupt quirk mechanism for Xeon chipsets)
Date: Fri, 27 Nov 2020 00:45:59 +0100	[thread overview]
Message-ID: <87blfjk7go.fsf@nanos.tec.linutronix.de> (raw)
In-Reply-To: <d512469f-de04-2f66-ca42-21ec3c5331ba@tik.uni-stuttgart.de>

Stefan,

On Wed, Nov 25 2020 at 14:41, Stefan Bühler wrote:
> On 11/25/20 12:54 PM, Thomas Gleixner wrote:
>> On Wed, Sep 16 2020 at 12:12, Stefan Bühler wrote:
>> Can you please provide the output of:
>> 
>>  for ID in 05:00.0 06:00.0 06:00.1 06:01.0 06:01.1; do lspci -s $ID -vvv; done
>
> See attachment.
>
> Also I boot the affected systems now with "pci=noioapicquirk", which
> "solves" the issue too (instead of patching the kernel).

Yes, it skips the quirks.

> 05:00.0 PCI bridge: PLX Technology, Inc. PEX8112 x1 Lane PCI Express-to-PCI Bridge (rev aa) (prog-if 00 [Normal decode])
> 	Physical Slot: 1
> 	Control: I/O+ Mem+ BusMaster+ SpecCycle- MemWINV- VGASnoop- ParErr- Stepping- SERR+ FastB2B- DisINTx-
> 	Status: Cap+ 66MHz- UDF- FastB2B- ParErr- DEVSEL=fast >TAbort- <TAbort- <MAbort- >SERR- <PERR- INTx-
> 	Latency: 0, Cache Line Size: 32 bytes
> 	Interrupt: pin A routed to IRQ 16
> 	NUMA node: 0
> 	Bus: primary=05, secondary=06, subordinate=06, sec-latency=64
> 	I/O behind bridge: 0000e000-0000efff
> 	Memory behind bridge: fb400000-fb4fffff
> 	Prefetchable memory behind bridge: fff00000-000fffff
> 	Secondary status: 66MHz+ FastB2B- ParErr- DEVSEL=medium >TAbort- <TAbort- <MAbort+ <SERR- <PERR-
> 	BridgeCtl: Parity- SERR+ NoISA- VGA- MAbort- >Reset- FastB2B-
> 		PriDiscTmr- SecDiscTmr- DiscTmrStat- DiscTmrSERREn-
> 	Capabilities: <access denied>

Can you please run this as root so the Capabilities are accessible?

Thanks,

        tglx

  reply	other threads:[~2020-11-26 23:46 UTC|newest]

Thread overview: 12+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-02-20 19:29 [PATCH v2 0/2] pci: Add boot interrupt quirk mechanism for Xeon chipsets Sean V Kelley
2020-02-20 19:29 ` [PATCH v2 1/2] " Sean V Kelley
2020-02-20 19:29 ` [PATCH v2 2/2] Documentation:PCI: Add background on Boot Interrupts Sean V Kelley
2020-02-27 22:49 ` [PATCH v2 0/2] pci: Add boot interrupt quirk mechanism for Xeon chipsets Bjorn Helgaas
     [not found] ` <b2da25c8-121a-b241-c028-68e49bab0081@tik.uni-stuttgart.de>
2020-11-25 11:54   ` boot interrupt quirk (also in 4.19.y) breaks serial ports (was: [PATCH v2 0/2] pci: Add boot interrupt quirk mechanism for Xeon chipsets) Thomas Gleixner
2020-11-25 13:41     ` Stefan Bühler
2020-11-26 23:45       ` Thomas Gleixner [this message]
2020-11-27  9:17         ` Stefan Bühler
2020-11-30 10:48           ` Thomas Gleixner
2022-09-23 19:20   ` Grzegorz Halat
2022-09-26 21:17     ` Bjorn Helgaas
2022-09-28  8:34     ` boot interrupt quirk (also in 4.19.y) breaks serial ports (was: [PATCH v2 0/2] pci: Add boot interrupt quirk mechanism for Xeon chipsets) #forregzbot Thorsten Leemhuis

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