linux-kernel - Re: ioatdma(Intel(R) I/OAT DMA Engine init failed)

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Date:	Thu, 19 May 2016 15:17:59 -0700
From:	Yinghai Lu <yinghai@...nel.org>
To:	"Jiang, Dave" <dave.jiang@...el.com>
Cc:	"Koul, Vinod" <vinod.koul@...el.com>,
	Gavin Guo <gavin.guo@...onical.com>,
	"dmaengine@...r.kernel.org" <dmaengine@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"Williams, Dan J" <dan.j.williams@...el.com>
Subject: Re: ioatdma(Intel(R) I/OAT DMA Engine init failed)

On Thu, May 19, 2016 at 1:17 PM, Jiang, Dave <dave.jiang@...el.com> wrote:
>> > > And I checked the config and found the CONFIG_PCI_MMCONFIG=y. The
>> > > following string also can be observed in the dmesg:
>> > >
>> > > [    1.419853] PCI: MMCONFIG for domain 0000 [bus 00-ff] at
>> > > [mem0x80000000-0x8fffffff] (base 0x80000000)
>> > > [    1.419855] PCI: MMCONFIG at [mem 0x80000000-0x8fffffff] reserved in E820
>> > >
>> > > It seems the extended PCI config space is enabled. If there is
>> > > anything missed?

how about output for  "lspci -vvxxxx" ?