Enabling branch recording when branch recording configuration values satisfy a predetermined condition

An apparatus comprising:

• processing circuitry to process instructions;
• reset circuitry responsive to a cold reset trigger event to perform a cold reset by resetting the processing circuitry and responsive to a warm reset trigger event to perform a warm reset by resetting a subset of state that is reset in response to the cold reset trigger event;
• and
• branch recording circuitry to perform branch recording to store, in branch record storage circuitry, information about processed branch instructions;
• wherein the branch recording circuitry is configured to:
• determine whether warm and cold branch recording configuration values held in at least one register satisfy a predetermined condition;
• and
• when the warm and cold branch recording configuration values satisfy the predetermined condition, enable the branch recording,
• wherein the branch record storage circuitry is configured to make the information about the processed branch instruction available for diagnostic analysis, and
• wherein the cold reset comprises resetting both of the warm and cold branch recording configuration values, and the warm reset comprises resetting the warm branch recording configuration value and leaving the cold branch recording configuration value unchanged.