linux-kernel - RE: [PATCH 2/4 v2] PCI: support ARI capability

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Message-ID: <7A25B56E4BE99C4283EB931CD1A40E110181CAB3@pdsmsx414.ccr.corp.intel.com>
Date:	Wed, 10 Sep 2008 15:35:06 +0800
From:	"Zhao, Yu" <yu.zhao@...el.com>
To:	"Alex Chiang" <achiang@...com>
Cc:	"Jesse Barnes" <jbarnes@...tuousgeek.org>,
	<linux-pci@...r.kernel.org>,
	"Randy Dunlap" <randy.dunlap@...cle.com>,
	"Greg KH" <greg@...ah.com>,
	"Grant Grundler" <grundler@...isc-linux.org>,
	"Matthew Wilcox" <matthew@....cx>, <linux-kernel@...r.kernel.org>,
	<kvm@...r.kernel.org>, <virtualization@...ts.linux-foundation.org>,
	<xen-devel@...ts.xensource.com>
Subject: RE: [PATCH 2/4 v2] PCI: support ARI capability

On Monday, September 01, 2008 11:28 PM, Alex Chiang wrote:
>* Zhao, Yu <yu.zhao@...el.com>:
>> Support Alternative Routing-ID Interpretation (ARI), which increases the
>number of functions that can be supported by a PCIe endpoint. ARI is required
>by SR-IOV.
>>
>> PCI-SIG ARI specification can be found at
>http://www.pcisig.com/specifications/pciexpress/specifications/ECN-alt-rid-
>interpretation-070604.pdf
>>
>> Signed-off-by: Yu Zhao <yu.zhao@...el.com>
>> Signed-off-by: Eddie Dong <eddie.dong@...el.com>
>>
>> ---
>>  drivers/pci/Kconfig      |    7 ++++
>>  drivers/pci/Makefile     |    2 +
>>  drivers/pci/ari.c        |   71
>++++++++++++++++++++++++++++++++++++++++++++++
>>  drivers/pci/pci.h        |    8 +++++
>>  drivers/pci/probe.c      |    3 ++
>>  include/linux/pci.h      |   25 ++++++++++++++++
>>  include/linux/pci_regs.h |   14 +++++++++
>>  7 files changed, 130 insertions(+), 0 deletions(-)
>>  create mode 100644 drivers/pci/ari.c
>>
>> diff --git a/drivers/pci/Kconfig b/drivers/pci/Kconfig
>> index e1ca425..f43cc46 100644
>> --- a/drivers/pci/Kconfig
>> +++ b/drivers/pci/Kconfig
>> @@ -50,3 +50,10 @@ config HT_IRQ
>>  	   This allows native hypertransport devices to use interrupts.
>>
>>  	   If unsure say Y.
>> +
>> +config PCI_ARI
>> +	bool "PCI ARI support"
>> +	depends on PCI
>> +	default n
>> +	help
>> +	  This enables PCI Alternative Routing-ID Interpretation.
>
>This Kconfig help text is a little weak. Why not include the text
>you've already written here:
>
>	Support Alternative Routing-ID Interpretation (ARI), which
>	increases the number of functions that can be supported by a PCIe
>	endpoint. ARI is required by SR-IOV.
>
>In the Kconfig text, you might want to expand the SR-IOV acronym
>too.

Thanks. Will do in next version.

>
>Thanks.
>
>/ac

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