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List:       linux-kernel
Subject:    Re: Fwd: Patch to control VGA bus routing and active VGA device.
From:       Matthew Wilcox <matthew () wil ! cx>
Date:       2005-01-24 20:22:23
Message-ID: 20050124202223.GO31455 () parcelfarce ! linux ! theplanet ! co ! uk
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On Mon, Jan 24, 2005 at 02:17:15PM -0500, Jon Smirl wrote:
> On Mon, 24 Jan 2005 17:51:31 +0000, Matthew Wilcox <matthew@wil.cx> wrote:
> > Yes -- *very* platform specific.  Some are even configurable as to how
> > much they support.  See http://ftp.parisc-linux.org/docs/chips/zx1-mio.pdf
> 
> Is this a justification for doing device drivers for bridge chips? It
> has been mentioned before but no one has done it.

I don't think this is ... the bridges mentioned are host->pci bridges.

> Any ideas why the code I sent won't work on the x86? I can shut
> routing off but I can't get it back on again.
> 
> The motivation behind the code is to get X to quit doing this from user space.

I suppose we could log all access X does and compare to what your code
ends up doing ...

-- 
"Next the statesmen will invent cheap lies, putting the blame upon 
the nation that is attacked, and every man will be glad of those
conscience-soothing falsities, and will diligently study them, and refuse
to examine any refutations of them; and thus he will by and by convince 
himself that the war is just, and will thank God for the better sleep 
he enjoys after this process of grotesque self-deception." -- Mark Twain
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