This is a note to let you know that I've just added the patch titled
perf/arm-cmn: Add more bits to child node address offset field
to the 5.19-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
perf-arm-cmn-add-more-bits-to-child-node-address-offset-field.patch
and it can be found in the queue-5.19 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From 05d6f6d346fea2fa4580a0c2b6be207456bebb08 Mon Sep 17 00:00:00 2001
From: Ilkka Koskinen <ilkka@xxxxxxxxxxxxxxxxxxxxxx>
Date: Mon, 8 Aug 2022 12:54:55 -0700
Subject: perf/arm-cmn: Add more bits to child node address offset field
From: Ilkka Koskinen <ilkka@xxxxxxxxxxxxxxxxxxxxxx>
commit 05d6f6d346fea2fa4580a0c2b6be207456bebb08 upstream.
CMN-600 uses bits [27:0] for child node address offset while bits [30:28]
are required to be zero.
For CMN-650, the child node address offset field has been increased
to include bits [29:0] while leaving only bit 30 set to zero.
Let's include the missing two bits and assume older implementations
comply with the spec and set bits [29:28] to 0.
Signed-off-by: Ilkka Koskinen <ilkka@xxxxxxxxxxxxxxxxxxxxxx>
Fixes: 60d1504070c2 ("perf/arm-cmn: Support new IP features")
Reviewed-by: Robin Murphy <robin.murphy@xxxxxxx>
Link: https://lore.kernel.org/r/20220808195455.79277-1-ilkka@xxxxxxxxxxxxxxxxxxxxxx
Signed-off-by: Will Deacon <will@xxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/perf/arm-cmn.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/perf/arm-cmn.c b/drivers/perf/arm-cmn.c
index 80d8309652a4..b80a9b74662b 100644
--- a/drivers/perf/arm-cmn.c
+++ b/drivers/perf/arm-cmn.c
@@ -36,7 +36,7 @@
#define CMN_CI_CHILD_COUNT GENMASK_ULL(15, 0)
#define CMN_CI_CHILD_PTR_OFFSET GENMASK_ULL(31, 16)
-#define CMN_CHILD_NODE_ADDR GENMASK(27, 0)
+#define CMN_CHILD_NODE_ADDR GENMASK(29, 0)
#define CMN_CHILD_NODE_EXTERNAL BIT(31)
#define CMN_MAX_DIMENSION 12
--
2.37.3
Patches currently in stable-queue which might be from ilkka@xxxxxxxxxxxxxxxxxxxxxx are
queue-5.19/perf-arm-cmn-add-more-bits-to-child-node-address-offset-field.patch
