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a617953855
Instead of open-coding a check on the ID_DFR0 PerfMon ID register field, create a standardly-named isar_feature for "does AArch32 have a v8.1 PMUv3" and use it. This entails moving the id_dfr0 field into the ARMISARegisters struct. Reviewed-by: Richard Henderson <richard.henderson@linaro.org> Signed-off-by: Peter Maydell <peter.maydell@linaro.org> Message-id: 20200214175116.9164-9-peter.maydell@linaro.org