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Date: Wed, 16 Jun 2010 20:36:27 -0400
Message-ID: <AANLkTillLDLJdk0CU9TR-9eB5cPrNlBXejgFwUG2vuGv@mail.gmail.com>
Subject: Re: [tip:x86/mm] x86, mm: Set first MB as RW+NX
From: Siarhei Liakh <sliakh.lkml@gmail.com>
To: castet.matthieu@free.fr
Cc: linux-kernel@vger.kernel.org, "H. Peter Anvin" <hpa@linux.intel.com>,
       Ingo Molnar <mingo@elte.hu>
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>> > Special accommodations have been made for BIOS32/PCI BIOS services:
>> > according to BIOS32 specification
>> > (http://members.datafast.net.au/dft0802/specs/bios32.pdf), at most two
>> > pages per BIOS32 service should be set executable and no pages need to
>> > be writeable.
>> From my understanding only the service directory take 2 pages.
>>
>> The no info for the pci service :
>> - the length field could be used to find the number of page it takes.
>> - could we assume data ro ?
>>
>
> http://members.datafast.net.au/dft0802/specs/bios21.pdf got all info for pci
> bios [1].
> So I was right : we shouldn't assume pci bios routine take only 2 pages, but use
> the length parameter.

Thanks for looking into this. I will be posting another patch shortly.
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