Re: [PATCH 0/3] powerpc/fsl: PCI refactoring and QEMU paravirt platform

From: Kumar Gala <hidden>
Date: 2012-06-29 16:04:27

On Jun 29, 2012, at 11:01 AM, Scott Wood wrote:

On 06/29/2012 10:57 AM, Kumar Gala wrote:

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On Jun 28, 2012, at 9:36 PM, Jia Hongtao-B38951 wrote:
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-----Original Message-----
From: Wood Scott-B07421
Sent: Friday, June 29, 2012 12:31 AM
To: Jia Hongtao-B38951
Cc: Wood Scott-B07421; galak@kernel.crashing.org; Li Yang-R58472;
agraf@suse.de; linuxppc-dev@lists.ozlabs.org
Subject: Re: [PATCH 0/3] powerpc/fsl: PCI refactoring and QEMU =

paravirt

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platform
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On 06/27/2012 11:06 PM, Jia Hongtao-B38951 wrote:

quoted

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-----Original Message-----
From: Wood Scott-B07421
Sent: Thursday, June 28, 2012 7:49 AM
To: galak@kernel.crashing.org
Cc: agraf@suse.de; linuxppc-dev@lists.ozlabs.org; Jia =

Hongtao-B38951

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Subject: [PATCH 0/3] powerpc/fsl: PCI refactoring and QEMU =

paravirt

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platform
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The QEMU stuff is related to the PCI refactoring because =

currently

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we have a hard time selecting a primary bus under QEMU, and also

because

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the generic qemu e500 platform wants a full list of FSL PCI

compatibles

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to check.
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It seems that not all primary bus has "isa" node like 8541 and =

8555.

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Do those boards (it's the boards that matter, not chips...) have =

legacy

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ISA?  If they do, and it's not in the device tree, then we should =

fix

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the device tree for consistency, but also retain some sort of hack =

to

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remain compatible with old device trees.
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A board can refrain from using the new common infrastructure if it =

has a

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good reason to.

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I'm not sure that MPC8541CDS (or 8555) has legacy ISA. I just =

checked in

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kernel and dts which implies the board has primary bus and no "isa" =

node.

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I will find out the facts later.

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Pretty sure the boards have ISA, if you see the .dts has references =

to 'ISA bridge' & 'i8259' PIC.

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OK.  How about looking for an i8259 node as well?
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-Scott

Works for me, saves us having to waste time on figuring out how to =
update .dts for the boards.

- k

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