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UPSTREAM: perf/arm-cmn: Add more bits to child node address offset field

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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.

Bug: 254441685
Signed-off-by: Ilkka Koskinen <ilkka@os.amperecomputing.com>
Fixes: 60d1504070 ("perf/arm-cmn: Support new IP features")
Reviewed-by: Robin Murphy <robin.murphy@arm.com>
Link: https://lore.kernel.org/r/20220808195455.79277-1-ilkka@os.amperecomputing.com
Signed-off-by: Will Deacon <will@kernel.org>
(cherry picked from commit 05d6f6d346)
Signed-off-by: Lee Jones <joneslee@google.com>
Change-Id: I8d4048e6bca6498c04b10f31bc188bebdf3f716b
This commit is contained in:
Ilkka Koskinen
2022-08-08 12:54:55 -07:00
committed by Lee Jones
parent 375c07024f
commit d886fe15e5
1 changed files with 1 additions and 1 deletions
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2
drivers/perf/arm-cmn.c
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@@ -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 8