Date: Sun, 15 Sep 2002 08:07:55 -0700 (PDT) From: David Malone <dwmalone@FreeBSD.org> To: cvs-committers@FreeBSD.org, cvs-all@FreeBSD.org Subject: cvs commit: src/sys/sys memrange.h src/sys/i386/i386 i686_mem.c k6_mem.c src/usr.sbin/memcontrol memcontrol.8 memcontrol.c Message-ID: <200209151507.g8FF7tnW094164@freefall.freebsd.org>
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dwmalone 2002/09/15 08:07:55 PDT
Modified files:
sys/sys memrange.h
sys/i386/i386 k6_mem.c i686_mem.c
usr.sbin/memcontrol memcontrol.8 memcontrol.c
Log:
Some BIOSs are using MTRR values that are only documented under NDA
to control the mapping of things like the ACPI and APM into memory.
The problem is that starting X changes these values, so if something
was using the bits of BIOS mapped into memory (say ACPI or APM),
then next time they access this memory the machine would hang.
This patch refuse to change MTRR values it doesn't understand,
unless a new "force" option is given. This means X doesn't change
them by accident but someone can override that if they really want
to.
PR: 28418
Tested by: Christopher Masto <chris@netmonger.net>,
David Bushong <david@bushong.net>,
Santos <casd@myrealbox.com>
MFC after: 1 week
Revision Changes Path
1.15 +11 -0 src/sys/i386/i386/i686_mem.c
1.9 +2 -2 src/sys/i386/i386/k6_mem.c
1.6 +1 -0 src/sys/sys/memrange.h
1.9 +2 -1 src/usr.sbin/memcontrol/memcontrol.8
1.8 +1 -0 src/usr.sbin/memcontrol/memcontrol.c
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