[PATCH v16 01/18] cxl: Clarify decoder interleave limit

[Srirangan Madhavan]

CXL 2.0 added 16-way memory interleaving, making the comment that the
specification supports only 8-way interleaving stale. Explain that 16 is
the largest interleave a decoder can express, without changing the limit.

Suggested-by: Jonathan Cameron <jic23@xxxxxxxxxx>
Link: https://lore.kernel.org/linux-cxl/20260912003057.3db9335c@jic23-hlaptop/
Signed-off-by: Srirangan Madhavan <smadhavan@xxxxxxxxxx>
Reviewed-by: Jonathan Cameron <jonathan.cameron@xxxxxxxxxxxxxxxx>
Reviewed-by: Dave Jiang <dave.jiang@xxxxxxxxx>
Reviewed-by: Richard Cheng <icheng@xxxxxxxxxx>
Reviewed-by: Li Ming <ming.li@xxxxxxxxxxxx>
---
 drivers/cxl/cxl.h | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/drivers/cxl/cxl.h b/drivers/cxl/cxl.h
index 3ef0810ab86b..50af716f69df 100644
--- a/drivers/cxl/cxl.h
+++ b/drivers/cxl/cxl.h
@@ -269,10 +269,7 @@ enum cxl_decoder_type {
 	CXL_DECODER_HOSTONLYMEM = 3,
 };
 
-/*
- * Current specification goes up to 8, double that seems a reasonable
- * software max for the foreseeable future
- */
+/* 16 is the largest interleave a decoder can express (CXL 4.0 8.2.4.20.7). */
 #define CXL_DECODER_MAX_INTERLEAVE 16
 
 #define CXL_QOS_CLASS_INVALID -1
-- 
2.43.0