RE: [PATCH] enable to read region 5 from /dev/kmem

From: Luck, Tony <>
Date: 2005-07-13 03:14:36
This is better.  But allowing access to region 6 through
/dev/kmem will open up a whole new set of problems.  If the
user does an uncacheable read through region 6 from a memory
address that is mapped cacheably in region 7, then the
processor may machine check [SDM 4.4.1, page 2:64, last
paragraph: "It is recommended that the processor report a
Machine Check abort if the following memory attribute aliasing
is detected: * cache-hit on an uncacheable page"]

So I think we should disallow access to region 6.

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Received on Tue Jul 12 13:16:43 2005

This archive was generated by hypermail 2.1.8 : 2005-08-02 09:20:40 EST