linux-kernel - Re: 2.6.26-rc9-git9 doesn't boot on Macintel

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Date:	Wed, 16 Jul 2008 01:36:21 -0700
From:	"Yinghai Lu" <yhlu.kernel@...il.com>
To:	"Justin Mattock" <justinmattock@...il.com>,
	"Ingo Molnar" <mingo@...e.hu>,
	"Barnes, Jesse" <jesse.barnes@...el.com>
Cc:	"Jack Howarth" <howarth@...mo.msbb.uc.edu>,
	"Linux Kernel Mailing List" <linux-kernel@...r.kernel.org>
Subject: Re: 2.6.26-rc9-git9 doesn't boot on Macintel

On Wed, Jul 16, 2008 at 12:50 AM, Justin Mattock
<justinmattock@...il.com> wrote:
> On Wed, Jul 16, 2008 at 7:44 AM, Yinghai Lu <yhlu.kernel@...il.com> wrote:
>> I looked at your dmesg from 2.6.25.10
>>
>> it tried to use mmconfig, and later fall back to conf1, because
>> 1. your MCFG said it support bus [0,255], and range will be
>> [0xf0000000, 0xffffffff]
>> 2. firmware only reserve [0xf0000000, 0xf4000000)
>>
>> and 2.5.25 will not check acp reserved range.
>>
>> from 2.6.26, it will check if the [0xf0000000, 0xffffffff] is reserved
>> via acpi dsdt _crs?
>> it will fail too.
>>
>> So MCFG table is broken.
>>
>> You need to get firmware update from your vendor.
>>
>> or we need to put that system on DMI check to change end_bus_number
>> from 0xff to 0x3f
>>
>> ps: mem=2g will not work, it will can not change mcfg table etc... you
>> need take out 1G ram out.
>>
>> YH
>>
>
> Well shit man, that sucks...
> how hard is it to do a DMI check?
> regards;

please check attached patch... not sure the
DMI_MATCH(DMI_PRODUCT_NAME, "MacPro2"),  is right or not.

YH

View attachment "mmconfig_apple_macpro2.patch" of type "text/x-patch" (1702 bytes)