sysfs: document files in /sys/firmware/sgi_uv/

Document files in /sys/firmware/sgi_uv/.

Signed-off-by: Russ Anderson <rja@sgi.com>
Cc: Jack Steiner <steiner@sgi.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Acked-by: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/Documentation/ABI/testing/sysfs-firmware-sgi_uv b/Documentation/ABI/testing/sysfs-firmware-sgi_uv
new file mode 100644 (file)
index 0000000..4573fd4
--- /dev/null
+++ b/Documentation/ABI/testing/sysfs-firmware-sgi_uv
@@ -0,0 +1,27 @@
+What:          /sys/firmware/sgi_uv/
+Date:          August 2008
+Contact:       Russ Anderson <rja@sgi.com>
+Description:
+               The /sys/firmware/sgi_uv directory contains information
+               about the SGI UV platform.
+
+               Under that directory are a number of files:
+
+                       partition_id
+                       coherence_id
+
+               The partition_id entry contains the partition id.
+               SGI UV systems can be partitioned into multiple physical
+               machines, which each partition running a unique copy
+               of the operating system.  Each partition will have a unique
+               partition id.  To display the partition id, use the command:
+
+                       cat /sys/firmware/sgi_uv/partition_id
+
+               The coherence_id entry contains the coherence id.
+               A partitioned SGI UV system can have one or more coherence
+               domain.  The coherence id indicates which coherence domain
+               this partition is in.  To display the coherence id, use the
+               command:
+
+                       cat /sys/firmware/sgi_uv/coherence_id