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authorBorislav Petkov <bp@alien8.de>2016-11-17 12:45:57 +0300
committerIngo Molnar <mingo@kernel.org>2016-12-20 11:36:29 +0300
commita268b5f1d6e4639fa6d78fc8bdddaebaa032ab24 (patch)
tree6877d185974214b6135784567062bc2349d41aaf /Documentation
parent59107e2f48831daedc46973ce4988605ab066de3 (diff)
downloadlinux-a268b5f1d6e4639fa6d78fc8bdddaebaa032ab24.tar.xz
x86/topology: Document cpu_llc_id
It means different things on Intel and AMD so write it down so that there's no confusion. Signed-off-by: Borislav Petkov <bp@suse.de> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Yazen Ghannam <yazen.ghannam@amd.com> Link: http://lkml.kernel.org/r/20161117094557.jm6hwzdd52h7iwnj@pd.tnic Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/x86/topology.txt9
1 files changed, 9 insertions, 0 deletions
diff --git a/Documentation/x86/topology.txt b/Documentation/x86/topology.txt
index 06afac252f5b..f3e9d7e9ed6c 100644
--- a/Documentation/x86/topology.txt
+++ b/Documentation/x86/topology.txt
@@ -63,6 +63,15 @@ The topology of a system is described in the units of:
The maximum possible number of packages in the system. Helpful for per
package facilities to preallocate per package information.
+ - cpu_llc_id:
+
+ A per-CPU variable containing:
+ - On Intel, the first APIC ID of the list of CPUs sharing the Last Level
+ Cache
+
+ - On AMD, the Node ID or Core Complex ID containing the Last Level
+ Cache. In general, it is a number identifying an LLC uniquely on the
+ system.
* Cores: