linux-kernel - Re: GART_IOMMU without AGP

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Message-Id: <200907230315.44654.pavel@pavlinux.ru>
Date:	Thu, 23 Jul 2009 03:15:43 +0400
From:	Pavel Vasilyev <pavel@...linux.ru>
To:	linux-kernel@...r.kernel.org
Subject: Re: GART_IOMMU without AGP

On Thursday 23 July 2009 02:17:38 you wrote:
> On Wed, 22 Jul 2009 17:37:46 -0400
>
> Dave Jones <davej@...hat.com> wrote:
> > On Wed, Jul 22, 2009 at 07:26:49PM +0400, Pavel Vasilyev wrote:
> >  > In the kernel configuration, if I choose x86_64 and PCI, then choose
> >  > the item "Garth IOMMU support", which, in turn, chooses not to switch
> >  > off, support for AGP. But many IOMMU system does not have AGP bus.
> >
> > The lack of AGP slots doesn't mean a lack of AGP bus.
> > It's part of the K8 on-CPU northbridge.
>
> And the user is selecting CONFIG_AGP to select AGP devices rather than to
> demonstrate their deep guru grade knowledge of K8 northbridges. Not only
> that but CONFIG_AGP controls the display of AGP video card options so it
> is a selection for offered devices not really an internal detail.
>
> So I think Pavel is right here.


May be  next logic 

 IF  ( GART_IOMMU  == TRUE )  
    THEN  
            IF ( AGP == TRUE ) 
               THEN 
                        AGP_AMD64 = TRUE;
           FI
FI 

Now 

 IF  ( GART_IOMMU  == TRUE )  
    THEN  
              AGP = TRUE;'
	AGP_AMD64 = TURE;
FI
 

And in bytes is 

-rw-r--r-- 1 root root 54322 Jul 23 01:21 agpgart.ko
-rw-r--r-- 1 root root 19745 Jil 23 01:21  amd64-agp.ko 

 is  74067 bytes  :)

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