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2c43aced9b
T241-MPAM-6 causes all MBWU counter formats to count 64-byte requests instead of bytes. Commitdc48eb1ff2excluded the 63-bit MSMON_MBWU_LWD format while scaling the shorter counters. Systems selecting the preferred 63-bit counter consequently report bandwidth values that are 64 times too small. Apply the scale to both the sampled value and overflow correction for the 63-bit format. Unsigned arithmetic retains modulo-u64 behavior when the scaled counter range exceeds u64. Fixes:dc48eb1ff2("arm_mpam: Add workaround for T241-MPAM-6") Link: https://lore.kernel.org/lkml/20240816131432.993859-1-sdonthineni@nvidia.com/ Signed-off-by: Shanker Donthineni <sdonthineni@nvidia.com> Reviewed-by: Fenghua Yu <fenghuay@nvidia.com> Tested-by: Fenghua Yu <fenghuay@nvidia.com> Reviewed-by: Ben Horgan <ben.horgan@arm.com> Signed-off-by: Ben Horgan <ben.horgan@arm.com> Signed-off-by: Will Deacon <will@kernel.org>