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Date: Wed, 7 Nov 2007 12:14:42 -0800
From: Andrew Sharp <andy.sharp@onstor.com>
To: "Maxim Kozlovsky" <maxim.kozlovsky@onstor.com>
Cc: "Tim Gardner" <tim.gardner@onstor.com>, "dl-Cougar"
 <dl-Cougar@onstor.com>
Subject: Re: chassisd accessing kernel memory
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On Wed, 7 Nov 2007 11:34:58 -0800 "Maxim Kozlovsky"
<maxim.kozlovsky@onstor.com> wrote:

> 
> 
> _____________________________________________
> From: Tim Gardner 
> Sent: Wednesday, November 07, 2007 11:33 AM
> To: Maxim Kozlovsky; dl-Cougar
> Subject: RE: chassisd accessing kernel memory
> 
> Do all the addresses that chassisd access reside in a 32bit window?
> [MK] No.

Huh?  Sure they do.  In fact, < 32bit window, methinks.  What address
does chassisd access that isn't between [physical] 0x10000000 -
0x1fffffff ?

>  If so, we could simply extend mem.c to provide another /dev/port like
> driver that
> adds an offset to every address.
> [MK] How is that different from what I've just said?

Doing what I said is far easier.

____________________________________________
> From: Maxim Kozlovsky 
> Sent: Wednesday, November 07, 2007 8:44 AM
> To: dl-Cougar
> Subject: chassisd accessing kernel memory
> 
> It turns out with the 64 bit kernel accessing the kernel memory from
> /dev/port no longer works, since it requires reading at negative 64
> bit offsets like 0xffffffffb0000000. Looks like we'll have to stop
> cheating and write a separate driver.
> 
