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| author |   Rohit Mathew <rohit.mathew@arm.com> | 2025-11-19 12:22:59 +0000 |
|---|---|---|
| committer |   Catalin Marinas <catalin.marinas@arm.com> | 2025-11-19 18:34:23 +0000 |
| commit | fdc29a141d6364645509cb20129cba1f84e4c10f (patch) | |
| tree | 7717793399cfb588b2796d5dbfb9b9906add201d /kernel/locking/git:/ssh:/git@git.zx2c4.com | |
| parent | arm_mpam: Consider overflow in bandwidth counter state (diff) | |
| download | linux-rng-fdc29a141d6364645509cb20129cba1f84e4c10f.tar.xz linux-rng-fdc29a141d6364645509cb20129cba1f84e4c10f.zip | |
arm_mpam: Probe for long/lwd mbwu counters
mpam v0.1 and versions above v1.0 support optional long counter for
memory bandwidth monitoring. The MPAMF_MBWUMON_IDR register has fields
indicating support for long counters.
Probe these feature bits.
The mpam_feat_msmon_mbwu feature is used to indicate that bandwidth
monitors are supported, instead of muddling this with which size of
bandwidth monitors, add an explicit 31 bit counter feature.
Signed-off-by: Rohit Mathew <rohit.mathew@arm.com>
[ morse: Added 31bit counter feature to simplify later logic ]
Signed-off-by: James Morse <james.morse@arm.com>
Reviewed-by: Ben Horgan <ben.horgan@arm.com>
Reviewed-by: Jonathan Cameron <jonathan.cameron@huawei.com>
Reviewed-by: Gavin Shan <gshan@redhat.com>
Reviewed-by: Shaopeng Tan <tan.shaopeng@jp.fujitsu.com>
Reviewed-by: Fenghua Yu <fenghuay@nvidia.com>
Tested-by: Fenghua Yu <fenghuay@nvidia.com>
Tested-by: Shaopeng Tan <tan.shaopeng@jp.fujitsu.com>
Tested-by: Peter Newman <peternewman@google.com>
Tested-by: Carl Worth <carl@os.amperecomputing.com>
Tested-by: Gavin Shan <gshan@redhat.com>
Tested-by: Zeng Heng <zengheng4@huawei.com>
Tested-by: Hanjun Guo <guohanjun@huawei.com>
Signed-off-by: Ben Horgan <ben.horgan@arm.com>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Diffstat (limited to 'kernel/locking/git:/ssh:/git@git.zx2c4.com')
0 files changed, 0 insertions, 0 deletions