[PATCH v2 4/4] Documentation/powerpc: Add details about llc_override

[Shrikanth Hegde]

Provide documentation for the newly introduced llc_override kernel
parameter.

This may help one if they want to experiment with cache aware
scheduling on powerpc.

Signed-off-by: Shrikanth Hegde <sshegde@xxxxxxxxxxxxx>
---
 Documentation/admin-guide/kernel-parameters.txt | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/Documentation/admin-guide/kernel-parameters.txt b/Documentation/admin-guide/kernel-parameters.txt
index fbee7b544903..e13514076c18 100644
--- a/Documentation/admin-guide/kernel-parameters.txt
+++ b/Documentation/admin-guide/kernel-parameters.txt
@@ -3568,6 +3568,21 @@ Kernel parameters
 			Enable Live Update Orchestrator (LUO).
 			Default: off.
 
+	llc_override=	[PPC] Override the scheduler-visible LLC domain.
+			Format: { mc | pkg }
+
+			Use the specified topology domain as the LLC domain
+			for scheduler decisions. This is intended for
+			experimenting with Cache Aware Scheduling.
+
+			mc	Use the MC domain as the LLC domain.
+			pkg	Use the package domain as the LLC domain.
+
+			If unset, use the platform-provided LLC topology.
+
+			This is a debug option only. It does not change the
+			hardware cache topology.
+
 	lockd.nlm_grace_period=P  [NFS] Assign grace period.
 			Format: <integer>
 
-- 
2.52.0