linux-kernel - Re: Disable PCI while CONFIG

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Message-Id: <20110413153724.5776f7e5.rdunlap@xenotime.net>
Date:	Wed, 13 Apr 2011 15:37:24 -0700
From:	Randy Dunlap <rdunlap@...otime.net>
To:	Xianghua Xiao <xiaoxianghua@...il.com>
Cc:	linux-kernel@...r.kernel.org, linux-pci@...r.kernel.org
Subject: Re: Disable PCI while CONFIG_PCI=y

On Wed, 13 Apr 2011 17:01:38 -0500 Xianghua Xiao wrote:

> Yes I read that but my ARCH is arm.
> 

It would probably make sense to implement
	pci=off
for any $arch.

Any problem with that, linux-pci??


> 
> On Wed, Apr 13, 2011 at 3:10 PM, Randy Dunlap <rdunlap@...otime.net> wrote:
> > On Wed, 13 Apr 2011 15:05:59 -0500 Xianghua Xiao wrote:
> >
> >> Is it possible to do something like 'pci=off' to have the same effect
> >> as turning of CONFIG_PCI during menuconfig?
> >> I want to build one image for both PCIE RC and PCIE EP(endpoint), for
> >> EP I do not need PCI to be enabled at all.
> >>
> >> looking at drivers/pci/pci.c I don't see such option exists, am I
> >> missing something?
> >
> > Hm. Documentation/kernel-parameters.txt says:
> >
> >
> >        pci=option[,option...]  [PCI] various PCI subsystem options:
> >                earlydump       [X86] dump PCI config space before the kernel
> >                                changes anything
> >                off             [X86] don't probe for the PCI bus
> >
> > What $ARCH are you using?
> >
> > See arch/x86/pci/common.c::pcibios_setup() for code that handles
> >        pci=off
> >
> > ---

---
~Randy
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