Airbus: If airport reference is degrees true (northern operations), PERF APPR page reference is "TRUE WIND".
If airport reference is degrees magnetic (most typical operations)
Insert degrees true wind from TAF, METAR reports into DESCENT WIND page.
eg. 270/15/1 This converts automatically on DESCENT WIND page to 270/15/GRND and is displayed on PERF APPR page in degrees magnetic.