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coresight: trbe: Directly use ID_AA64DFR0_EL1_TraceBuffer_IMP

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is_trbe_available() checks for the TRBE support via extracting TraceBuffer
field value from ID_AA64DFR0_EL1, and ensures that it is implemented. This
replaces the open encoding '0b0001' with 'ID_AA64DFR0_EL1_TraceBuffer_IMP'
which is now available via sysreg tools. Functional change is not intended.

Cc: Suzuki K Poulose <suzuki.poulose@arm.com>
Cc: Mike Leach <mike.leach@linaro.org>
Cc: James Clark <james.clark@arm.com>
Cc: Leo Yan <leo.yan@linaro.org>
Cc: coresight@lists.linaro.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-kernel@vger.kernel.org
Signed-off-by: Anshuman Khandual <anshuman.khandual@arm.com>
Reviewed-by: James Clark <james.clark@arm.com>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Link: https://lore.kernel.org/r/20230802063658.1069813-1-anshuman.khandual@arm.com
This commit is contained in:
Anshuman Khandual 2023-08-02 12:06:58 +05:30 committed by Suzuki K Poulose
parent 04e8429c5b
commit c00701125c
1 changed files with 1 additions and 1 deletions
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2
drivers/hwtracing/coresight/coresight-trbe.h
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@ -23,7 +23,7 @@ static inline bool is_trbe_available(void)
unsigned int trbe = cpuid_feature_extract_unsigned_field(aa64dfr0,
ID_AA64DFR0_EL1_TraceBuffer_SHIFT);
return trbe >= 0b0001;
return trbe >= ID_AA64DFR0_EL1_TraceBuffer_IMP;
}
static inline bool is_trbe_enabled(void)