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| author |  Ilkka Koskinen <ilkka@os.amperecomputing.com>
| 2022-08-08 12:54:55 -0700 |
|---|---|---|
| committer |  Will Deacon <will@kernel.org>
| 2022-09-22 14:30:00 +0100 |
| commit | 05d6f6d346fea2fa4580a0c2b6be207456bebb08 (patch) | |
| tree | e7218755cc457bf6db926a6ab59f1c3181b23c80 /drivers/perf/arm-cmn.c | |
| parent | arm64: topology: fix possible overflow in amu_fie_setup() (diff) | |
| download | linux-05d6f6d346fea2fa4580a0c2b6be207456bebb08.tar.gz linux-05d6f6d346fea2fa4580a0c2b6be207456bebb08.tar.bz2 linux-05d6f6d346fea2fa4580a0c2b6be207456bebb08.zip | |
perf/arm-cmn: Add more bits to child node address offset field
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@os.amperecomputing.com>
Fixes: 60d1504070c2 ("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>
Diffstat (limited to 'drivers/perf/arm-cmn.c')
| -rw-r--r-- | drivers/perf/arm-cmn.c | 2 |
1 files changed, 1 insertions, 1 deletions
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 |