This patch adds deprecation notice of changing iv behaviour
when using Galois Counter Mode of operation. Right now IV of
all supported sizes can be used.

Signed-off-by: Arek Kusztal <arkadiuszx.kusz...@intel.com>
---
 doc/guides/rel_notes/deprecation.rst | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/doc/guides/rel_notes/deprecation.rst 
b/doc/guides/rel_notes/deprecation.rst
index ba39c2d..76eb166 100644
--- a/doc/guides/rel_notes/deprecation.rst
+++ b/doc/guides/rel_notes/deprecation.rst
@@ -87,3 +87,9 @@ Deprecation Notices
 * cryptodev: the ``uint8_t *data`` member of ``key`` structure in the xforms
   structure (``rte_crypto_cipher_xform``, ``rte_crypto_auth_xform``, and
   ``rte_crypto_aead_xform``) will be changed to ``const uint8_t *data``.
+
+* cryptodev: support for using IV with all sizes is added, J0 still can
+  be used but only when IV length in following structs 
``rte_crypto_auth_xform``,
+  ``rte_crypto_aead_xform`` is set to zero. When IV length is greater or equal
+  to one it means it represents IV, when is set to zero it means J0 is used
+  directly, in this case 16 bytes of J0 need to be passed.
-- 
2.1.0

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