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r: 245655
b: refs/heads/master
c: eecaaba
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Borislav Petkov authored and H. Peter Anvin committed May 16, 2011
1 parent d9c38c6 commit 0618219
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2 changes: 1 addition & 1 deletion [refs]
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refs/heads/master: 42be450565b0fc4607fae3e3a7da038d367a23ed
refs/heads/master: eecaaba5b2e4ae762b4726fae2e3b22630e137ec
34 changes: 17 additions & 17 deletions trunk/Documentation/ABI/testing/sysfs-devices-system-cpu
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Expand Up @@ -183,21 +183,21 @@ Description: Discover and change clock speed of CPUs
to learn how to control the knobs.


What: /sys/devices/system/cpu/cpu*/cache/index*/cache_disable_X
Date: August 2008
What: /sys/devices/system/cpu/cpu*/cache/index3/cache_disable_{0,1}
Date: August 2008
KernelVersion: 2.6.27
Contact: mark.langsdorf@amd.com
Description: These files exist in every cpu's cache index directories.
There are currently 2 cache_disable_# files in each
directory. Reading from these files on a supported
processor will return that cache disable index value
for that processor and node. Writing to one of these
files will cause the specificed cache index to be disabled.

Currently, only AMD Family 10h Processors support cache index
disable, and only for their L3 caches. See the BIOS and
Kernel Developer's Guide at
http://support.amd.com/us/Embedded_TechDocs/31116-Public-GH-BKDG_3-28_5-28-09.pdf
for formatting information and other details on the
cache index disable.
Users: joachim.deguara@amd.com
Contact: discuss@x86-64.org
Description: Disable L3 cache indices

These files exist in every CPU's cache/index3 directory. Each
cache_disable_{0,1} file corresponds to one disable slot which
can be used to disable a cache index. Reading from these files
on a processor with this functionality will return the currently
disabled index for that node. There is one L3 structure per
node, or per internal node on MCM machines. Writing a valid
index to one of these files will cause the specificed cache
index to be disabled.

All AMD processors with L3 caches provide this functionality.
For details, see BKDGs at
http://developer.amd.com/documentation/guides/Pages/default.aspx

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