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The availability and use of head/tailroom is an optimisation if the hardware supports its use for crypto-op info. Devices that do not support using the head/tailroom, can continue to operate without any performance-drop. Cavium's OcteonTX crypto hardware supports this feature and would use headroom and tailroom for submitting crypto-ops to the hardware. v1: * Removed deprecation notice and updated release notes * Added corresponding change in test-cryptodev Anoob Joseph (3): cryptodev: add min headroom and tailroom requirement app/crypto-perf: honour cryptodev's min headroom/tailroom test/crypto: skip validation of head/tailroom used by PMD app/test-crypto-perf/cperf_options.h | 2 ++ app/test-crypto-perf/cperf_test_common.c | 33 ++++++++++++------ app/test-crypto-perf/main.c | 17 +++++++++ doc/guides/rel_notes/release_18_08.rst | 6 ++++ lib/librte_cryptodev/rte_cryptodev.h | 6 ++++ test/test/test_cryptodev_blockcipher.c | 60 ++++++++++++++++++++++++++++---- 6 files changed, 107 insertions(+), 17 deletions(-)