linux-kernel - Re: [PATCH] x86/pci: host mmconfig detect clean up v3

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Date:	Wed, 11 Feb 2009 21:02:13 -0800
From:	Ed Swierk <eswierk@...stanetworks.com>
To:	Yinghai Lu <yinghai@...nel.org>
Cc:	jbarnes@...tuousgeek.org, Ingo Molnar <mingo@...e.hu>,
	hpa@...or.com, linux-kernel@...r.kernel.org,
	linux-pci@...r.kernel.org
Subject: Re: [PATCH] x86/pci: host mmconfig detect clean up v3

On Mon, Feb 9, 2009 at 5:59 PM, Yinghai Lu <yinghai@...nel.org> wrote:
> Impact: not assume one place for mmconfig in nb
>
> prepare for following case: amd fam10h + mcp55
> CPU MSR has some range, mcp55 pci config will have another one.
>
> also prepare for mcp55 + io55 system. every one will have one range.
>
> if it s mcp55 detect duties to execlude range that is used by CPU MSR
> aka, if CPU state bus 0-255, range in mcp55 need to be dropped.
> because HW in CPU will not route that mcp55 mmconfig to handle it.
>
> v2: fix e7520 exit path
> v3: make it could support
>   PCI MMCONFIG 0 [00-3f]
>   PCI MMCONFIG 0 [40-7f]
>   PCI MMCONFIG 0 [80-ff]
>
> Signed-off-by: Yinghai Lu <yinghai.lu@...nel.org>

Looks okay to me. I tested the patch on a board with an AMD 0Fh CPU
and one MCP55, no ACPI.

--Ed
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