16 lines
579 B
ReStructuredText
16 lines
579 B
ReStructuredText
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Activity Monitors
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=================
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FEAT_AMUv1 of the Armv8-A architecture introduces the Activity Monitors
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extension. This extension describes the architecture for the Activity Monitor
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Unit (|AMU|), an optional non-invasive component for monitoring core events
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through a set of 64-bit counters.
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When the ``ENABLE_AMU=1`` build option is provided, Trusted Firmware-A sets up
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the |AMU| prior to its exit from EL3, and will save and restore architected
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|AMU| counters as necessary upon suspend and resume.
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--------------
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*Copyright (c) 2021, Arm Limited. All rights reserved.*
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