doc: add limitation of AAD size to QAT guide

Add limitation of additional authenticated data (AAD) in
Intel QuickAssist Technology driver rst file

Fixes: 1703e94ac5ce ("qat: add driver for QuickAssist devices")
Cc: stable@dpdk.org
Signed-off-by: Arek Kusztal <arkadiuszx.kusztal@intel.com>
Acked-by: Fiona Trahe <fiona.trahe@intel.com>

diff --git a/doc/guides/cryptodevs/qat.rst b/doc/guides/cryptodevs/qat.rst
index 39f0322..21b56fc 100644 (file)
--- a/doc/guides/cryptodevs/qat.rst
+++ b/doc/guides/cryptodevs/qat.rst
@@ -88,6 +88,7 @@ Limitations
 * SNOW 3G (UIA2) and KASUMI (F9) supported only if hash length, hash offset fields are byte-aligned.
 * No BSD support as BSD QAT kernel driver not available.
 * ZUC EEA3/EIA3 is not supported by dh895xcc devices
+* Maximum additional authenticated data (AAD) for GCM is 240 bytes long.
 
 
 Installation