diff --git a/doc/guides/rel_notes/deprecation.rst b/doc/guides/rel_notes/deprecation.rst
index 9a73b1d8e..62d635b74 100644
--- a/doc/guides/rel_notes/deprecation.rst
+++ b/doc/guides/rel_notes/deprecation.rst
@@ -105,5 +105,3 @@ Deprecation Notices
     ``rte_cryptodev_queue_pair_dettach_sym_session()`` will be deprecated from
     18.05 and removed in 18.08, as there are no drivers doing anything useful
     with them.
-  - Some feature flags such as ``RTE_CRYPTODEV_FF_MBUF_SCATTER_GATHER`` are ambiguous,
-    so some will be replaced by more explicit flags.
diff --git a/doc/guides/rel_notes/release_18_08.rst b/doc/guides/rel_notes/release_18_08.rst
index e482d3d5f..2a136d88c 100644
--- a/doc/guides/rel_notes/release_18_08.rst
+++ b/doc/guides/rel_notes/release_18_08.rst
@@ -78,6 +78,14 @@ API Changes
   - ``rte_cryptodev_get_private_session_size`` is replaced with
     ``rte_cryptodev_sym_get_private_session_size``
 
+* cryptodev: Feature flag ``RTE_CRYPTODEV_FF_MBUF_SCATTER_GATHER`` is
+  replaced with the following more explicit flags:
+  - ``RTE_CRYPTODEV_FF_IN_PLACE_SGL``
+  - ``RTE_CRYPTODEV_FF_OUT_OF_PLACE_SGL_IN_SGL_OUT``
+  - ``RTE_CRYPTODEV_FF_OUT_OF_PLACE_SGL_IN_FB_OUT``
+  - ``RTE_CRYPTODEV_FF_OUT_OF_PLACE_FB_IN_SGL_OUT``
+  - ``RTE_CRYPTODEV_FF_OUT_OF_PLACE_FB_IN_FB_OUT``
+
 
 ABI Changes
 -----------
diff --git a/drivers/crypto/aesni_gcm/aesni_gcm_pmd.c b/drivers/crypto/aesni_gcm/aesni_gcm_pmd.c
index cd5b1952b..03917f220 100644
--- a/drivers/crypto/aesni_gcm/aesni_gcm_pmd.c
+++ b/drivers/crypto/aesni_gcm/aesni_gcm_pmd.c
@@ -492,7 +492,7 @@ aesni_gcm_create(const char *name,
 	dev->feature_flags = RTE_CRYPTODEV_FF_SYMMETRIC_CRYPTO |
 			RTE_CRYPTODEV_FF_SYM_OPERATION_CHAINING |
 			RTE_CRYPTODEV_FF_CPU_AESNI |
-			RTE_CRYPTODEV_FF_MBUF_SCATTER_GATHER;
+			RTE_CRYPTODEV_FF_OUT_OF_PLACE_SGL_IN_FB_OUT;
 
 	switch (vector_mode) {
 	case RTE_AESNI_GCM_SSE:
diff --git a/drivers/crypto/dpaa2_sec/dpaa2_sec_dpseci.c b/drivers/crypto/dpaa2_sec/dpaa2_sec_dpseci.c
index 1b1c30d85..4daee5f59 100644
--- a/drivers/crypto/dpaa2_sec/dpaa2_sec_dpseci.c
+++ b/drivers/crypto/dpaa2_sec/dpaa2_sec_dpseci.c
@@ -2762,7 +2762,11 @@ dpaa2_sec_dev_init(struct rte_cryptodev *cryptodev)
 			RTE_CRYPTODEV_FF_HW_ACCELERATED |
 			RTE_CRYPTODEV_FF_SYM_OPERATION_CHAINING |
 			RTE_CRYPTODEV_FF_SECURITY |
-			RTE_CRYPTODEV_FF_MBUF_SCATTER_GATHER;
+			RTE_CRYPTODEV_FF_IN_PLACE_SGL |
+			RTE_CRYPTODEV_FF_OUT_OF_PLACE_SGL_IN_SGL_OUT |
+			RTE_CRYPTODEV_FF_OUT_OF_PLACE_SGL_IN_FB_OUT |
+			RTE_CRYPTODEV_FF_OUT_OF_PLACE_FB_IN_SGL_OUT |
+			RTE_CRYPTODEV_FF_OUT_OF_PLACE_FB_IN_FB_OUT;
 
 	internals = cryptodev->data->dev_private;
 
diff --git a/drivers/crypto/dpaa_sec/dpaa_sec.c b/drivers/crypto/dpaa_sec/dpaa_sec.c
index b96552c57..8ad25f2be 100644
--- a/drivers/crypto/dpaa_sec/dpaa_sec.c
+++ b/drivers/crypto/dpaa_sec/dpaa_sec.c
@@ -2271,7 +2271,11 @@ dpaa_sec_dev_init(struct rte_cryptodev *cryptodev)
 			RTE_CRYPTODEV_FF_HW_ACCELERATED |
 			RTE_CRYPTODEV_FF_SYM_OPERATION_CHAINING |
 			RTE_CRYPTODEV_FF_SECURITY |
-			RTE_CRYPTODEV_FF_MBUF_SCATTER_GATHER;
+			RTE_CRYPTODEV_FF_IN_PLACE_SGL |
+			RTE_CRYPTODEV_FF_OUT_OF_PLACE_SGL_IN_SGL_OUT |
+			RTE_CRYPTODEV_FF_OUT_OF_PLACE_SGL_IN_FB_OUT |
+			RTE_CRYPTODEV_FF_OUT_OF_PLACE_FB_IN_SGL_OUT |
+			RTE_CRYPTODEV_FF_OUT_OF_PLACE_FB_IN_FB_OUT;
 
 	internals = cryptodev->data->dev_private;
 	internals->max_nb_queue_pairs = RTE_DPAA_MAX_NB_SEC_QPS;
diff --git a/drivers/crypto/null/null_crypto_pmd.c b/drivers/crypto/null/null_crypto_pmd.c
index 478ac0b62..224ba7233 100644
--- a/drivers/crypto/null/null_crypto_pmd.c
+++ b/drivers/crypto/null/null_crypto_pmd.c
@@ -177,7 +177,7 @@ cryptodev_null_create(const char *name,
 
 	dev->feature_flags = RTE_CRYPTODEV_FF_SYMMETRIC_CRYPTO |
 			RTE_CRYPTODEV_FF_SYM_OPERATION_CHAINING |
-			RTE_CRYPTODEV_FF_MBUF_SCATTER_GATHER;
+			RTE_CRYPTODEV_FF_IN_PLACE_SGL;
 
 	internals = dev->data->dev_private;
 
diff --git a/drivers/crypto/openssl/rte_openssl_pmd.c b/drivers/crypto/openssl/rte_openssl_pmd.c
index 972e2adfe..94b6e2de9 100644
--- a/drivers/crypto/openssl/rte_openssl_pmd.c
+++ b/drivers/crypto/openssl/rte_openssl_pmd.c
@@ -1660,7 +1660,7 @@ cryptodev_openssl_create(const char *name,
 	dev->feature_flags = RTE_CRYPTODEV_FF_SYMMETRIC_CRYPTO |
 			RTE_CRYPTODEV_FF_SYM_OPERATION_CHAINING |
 			RTE_CRYPTODEV_FF_CPU_AESNI |
-			RTE_CRYPTODEV_FF_MBUF_SCATTER_GATHER;
+			RTE_CRYPTODEV_FF_OUT_OF_PLACE_SGL_IN_FB_OUT;
 
 	/* Set vector instructions mode supported */
 	internals = dev->data->dev_private;
diff --git a/drivers/crypto/qat/qat_sym_pmd.c b/drivers/crypto/qat/qat_sym_pmd.c
index ee8633b85..629904e2f 100644
--- a/drivers/crypto/qat/qat_sym_pmd.c
+++ b/drivers/crypto/qat/qat_sym_pmd.c
@@ -274,7 +274,11 @@ qat_sym_dev_create(struct qat_pci_device *qat_pci_dev)
 	cryptodev->feature_flags = RTE_CRYPTODEV_FF_SYMMETRIC_CRYPTO |
 			RTE_CRYPTODEV_FF_HW_ACCELERATED |
 			RTE_CRYPTODEV_FF_SYM_OPERATION_CHAINING |
-			RTE_CRYPTODEV_FF_MBUF_SCATTER_GATHER;
+			RTE_CRYPTODEV_FF_IN_PLACE_SGL |
+			RTE_CRYPTODEV_FF_OUT_OF_PLACE_SGL_IN_SGL_OUT |
+			RTE_CRYPTODEV_FF_OUT_OF_PLACE_SGL_IN_FB_OUT |
+			RTE_CRYPTODEV_FF_OUT_OF_PLACE_FB_IN_SGL_OUT |
+			RTE_CRYPTODEV_FF_OUT_OF_PLACE_FB_IN_FB_OUT;
 
 	internals = cryptodev->data->dev_private;
 	internals->qat_dev = qat_pci_dev;
diff --git a/lib/librte_cryptodev/rte_cryptodev.c b/lib/librte_cryptodev/rte_cryptodev.c
index 381330f3d..15110661b 100644
--- a/lib/librte_cryptodev/rte_cryptodev.c
+++ b/lib/librte_cryptodev/rte_cryptodev.c
@@ -361,8 +361,16 @@ rte_cryptodev_get_feature_name(uint64_t flag)
 		return "CPU_AESNI";
 	case RTE_CRYPTODEV_FF_HW_ACCELERATED:
 		return "HW_ACCELERATED";
-	case RTE_CRYPTODEV_FF_MBUF_SCATTER_GATHER:
-		return "MBUF_SCATTER_GATHER";
+	case RTE_CRYPTODEV_FF_IN_PLACE_SGL:
+		return "IN_PLACE_SGL";
+	case RTE_CRYPTODEV_FF_OUT_OF_PLACE_SGL_IN_SGL_OUT:
+		return "OUT_OF_PLACE_SGL_IN_SGL_OUT";
+	case RTE_CRYPTODEV_FF_OUT_OF_PLACE_SGL_IN_FB_OUT:
+		return "OUT_OF_PLACE_SGL_IN_FB_OUT";
+	case RTE_CRYPTODEV_FF_OUT_OF_PLACE_FB_IN_SGL_OUT:
+		return "OUT_OF_PLACE_FB_IN_SGL_OUT";
+	case RTE_CRYPTODEV_FF_OUT_OF_PLACE_FB_IN_FB_OUT:
+		return "OUT_OF_PLACE_FB_IN_FB_OUT";
 	case RTE_CRYPTODEV_FF_CPU_NEON:
 		return "CPU_NEON";
 	case RTE_CRYPTODEV_FF_CPU_ARM_CE:
diff --git a/lib/librte_cryptodev/rte_cryptodev.h b/lib/librte_cryptodev/rte_cryptodev.h
index a60eb38e4..c897dc6e2 100644
--- a/lib/librte_cryptodev/rte_cryptodev.h
+++ b/lib/librte_cryptodev/rte_cryptodev.h
@@ -327,31 +327,47 @@ rte_cryptodev_get_aead_algo_enum(enum rte_crypto_aead_algorithm *algo_enum,
  *
  * Keep these flags synchronised with rte_cryptodev_get_feature_name()
  */
-#define	RTE_CRYPTODEV_FF_SYMMETRIC_CRYPTO	(1ULL << 0)
+#define	RTE_CRYPTODEV_FF_SYMMETRIC_CRYPTO		(1ULL << 0)
 /**< Symmetric crypto operations are supported */
-#define	RTE_CRYPTODEV_FF_ASYMMETRIC_CRYPTO	(1ULL << 1)
+#define	RTE_CRYPTODEV_FF_ASYMMETRIC_CRYPTO		(1ULL << 1)
 /**< Asymmetric crypto operations are supported */
-#define	RTE_CRYPTODEV_FF_SYM_OPERATION_CHAINING	(1ULL << 2)
+#define	RTE_CRYPTODEV_FF_SYM_OPERATION_CHAINING		(1ULL << 2)
 /**< Chaining symmetric crypto operations are supported */
-#define	RTE_CRYPTODEV_FF_CPU_SSE		(1ULL << 3)
+#define	RTE_CRYPTODEV_FF_CPU_SSE			(1ULL << 3)
 /**< Utilises CPU SIMD SSE instructions */
-#define	RTE_CRYPTODEV_FF_CPU_AVX		(1ULL << 4)
+#define	RTE_CRYPTODEV_FF_CPU_AVX			(1ULL << 4)
 /**< Utilises CPU SIMD AVX instructions */
-#define	RTE_CRYPTODEV_FF_CPU_AVX2		(1ULL << 5)
+#define	RTE_CRYPTODEV_FF_CPU_AVX2			(1ULL << 5)
 /**< Utilises CPU SIMD AVX2 instructions */
-#define	RTE_CRYPTODEV_FF_CPU_AESNI		(1ULL << 6)
+#define	RTE_CRYPTODEV_FF_CPU_AESNI			(1ULL << 6)
 /**< Utilises CPU AES-NI instructions */
-#define	RTE_CRYPTODEV_FF_HW_ACCELERATED		(1ULL << 7)
-/**< Operations are off-loaded to an external hardware accelerator */
-#define	RTE_CRYPTODEV_FF_CPU_AVX512		(1ULL << 8)
+#define	RTE_CRYPTODEV_FF_HW_ACCELERATED			(1ULL << 7)
+/**< Operations are off-loaded to an
+ * external hardware accelerator
+ */
+#define	RTE_CRYPTODEV_FF_CPU_AVX512			(1ULL << 8)
 /**< Utilises CPU SIMD AVX512 instructions */
-#define	RTE_CRYPTODEV_FF_MBUF_SCATTER_GATHER	(1ULL << 9)
-/**< Scatter-gather mbufs are supported */
-#define	RTE_CRYPTODEV_FF_CPU_NEON		(1ULL << 10)
+#define	RTE_CRYPTODEV_FF_IN_PLACE_SGL			(1ULL << 9)
+/**< In-place Scatter-gather (SGL) mbufs are supported */
+#define RTE_CRYPTODEV_FF_OUT_OF_PLACE_SGL_IN_SGL_OUT	(1ULL << 10)
+/**< Out-of-place Scatter-gather (SGL) mbufs are
+ * supported in input and output
+ */
+#define RTE_CRYPTODEV_FF_OUT_OF_PLACE_SGL_IN_FB_OUT	(1ULL << 11)
+/**< Out-of-place Scatter-gather (SGL) mbufs are supported
+ * in input, but only flat buffers (FB) are supported in output
+ */
+#define RTE_CRYPTODEV_FF_OUT_OF_PLACE_FB_IN_SGL_OUT	(1ULL << 12)
+/**< Out-of-place Scatter-gather (SGL) mbufs are supported
+ * in output, but only flat buffers (FB) are supported in input
+ */
+#define RTE_CRYPTODEV_FF_OUT_OF_PLACE_FB_IN_FB_OUT	(1ULL << 13)
+/**< Only flat buffers (FB) are supported in input and output */
+#define	RTE_CRYPTODEV_FF_CPU_NEON			(1ULL << 14)
 /**< Utilises CPU NEON instructions */
-#define	RTE_CRYPTODEV_FF_CPU_ARM_CE		(1ULL << 11)
+#define	RTE_CRYPTODEV_FF_CPU_ARM_CE			(1ULL << 15)
 /**< Utilises ARM CPU Cryptographic Extensions */
-#define	RTE_CRYPTODEV_FF_SECURITY		(1ULL << 12)
+#define	RTE_CRYPTODEV_FF_SECURITY			(1ULL << 16)
 /**< Support Security Protocol Processing */
 
 
diff --git a/test/test/test_cryptodev.c b/test/test/test_cryptodev.c
index 73aadaced..84fcf0651 100644
--- a/test/test/test_cryptodev.c
+++ b/test/test/test_cryptodev.c
@@ -3160,8 +3160,11 @@ test_kasumi_encryption_sgl(const struct kasumi_test_data *tdata)
 	struct rte_cryptodev_info dev_info;
 
 	rte_cryptodev_info_get(ts_params->valid_devs[0], &dev_info);
-	if (!(dev_info.feature_flags & RTE_CRYPTODEV_FF_MBUF_SCATTER_GATHER)) {
-		printf("Device doesn't support scatter-gather. "
+
+	uint64_t feat_flags = dev_info.feature_flags;
+
+	if (!(feat_flags & RTE_CRYPTODEV_FF_IN_PLACE_SGL)) {
+		printf("Device doesn't support in-place scatter-gather. "
 				"Test Skipped.\n");
 		return 0;
 	}
@@ -3308,8 +3311,11 @@ test_kasumi_encryption_oop_sgl(const struct kasumi_test_data *tdata)
 	struct rte_cryptodev_info dev_info;
 
 	rte_cryptodev_info_get(ts_params->valid_devs[0], &dev_info);
-	if (!(dev_info.feature_flags & RTE_CRYPTODEV_FF_MBUF_SCATTER_GATHER)) {
-		printf("Device doesn't support scatter-gather. "
+
+	uint64_t feat_flags = dev_info.feature_flags;
+	if (!(feat_flags & RTE_CRYPTODEV_FF_OUT_OF_PLACE_SGL_IN_SGL_OUT)) {
+		printf("Device doesn't support out-of-place scatter-gather "
+				"in both input and output mbufs. "
 				"Test Skipped.\n");
 		return 0;
 	}
@@ -3659,8 +3665,12 @@ test_snow3g_encryption_oop_sgl(const struct snow3g_test_data *tdata)
 	struct rte_cryptodev_info dev_info;
 
 	rte_cryptodev_info_get(ts_params->valid_devs[0], &dev_info);
-	if (!(dev_info.feature_flags & RTE_CRYPTODEV_FF_MBUF_SCATTER_GATHER)) {
-		printf("Device doesn't support scatter-gather. "
+
+	uint64_t feat_flags = dev_info.feature_flags;
+
+	if (!(feat_flags & RTE_CRYPTODEV_FF_OUT_OF_PLACE_SGL_IN_SGL_OUT)) {
+		printf("Device doesn't support out-of-place scatter-gather "
+				"in both input and output mbufs. "
 				"Test Skipped.\n");
 		return 0;
 	}
@@ -4493,10 +4503,13 @@ test_zuc_encryption_sgl(const struct wireless_test_data *tdata)
 		return -ENOTSUP;
 
 	rte_cryptodev_info_get(ts_params->valid_devs[0], &dev_info);
-	if (!(dev_info.feature_flags & RTE_CRYPTODEV_FF_MBUF_SCATTER_GATHER)) {
-		printf("Device doesn't support scatter-gather. "
+
+	uint64_t feat_flags = dev_info.feature_flags;
+
+	if (!(feat_flags & RTE_CRYPTODEV_FF_IN_PLACE_SGL)) {
+		printf("Device doesn't support in-place scatter-gather. "
 				"Test Skipped.\n");
-		return -ENOTSUP;
+		return 0;
 	}
 
 	plaintext_len = ceil_byte_length(tdata->plaintext.len);
diff --git a/test/test/test_cryptodev_blockcipher.c b/test/test/test_cryptodev_blockcipher.c
index 256a7daa2..7a11b3af8 100644
--- a/test/test/test_cryptodev_blockcipher.c
+++ b/test/test/test_cryptodev_blockcipher.c
@@ -77,12 +77,25 @@ test_blockcipher_one_case(const struct blockcipher_test_case *t,
 
 	if (t->feature_mask & BLOCKCIPHER_TEST_FEATURE_SG) {
 		rte_cryptodev_info_get(dev_id, &dev_info);
-		if (!(dev_info.feature_flags &
-				RTE_CRYPTODEV_FF_MBUF_SCATTER_GATHER)) {
-			printf("Device doesn't support scatter-gather. "
+		uint64_t feat_flags = dev_info.feature_flags;
+		uint64_t oop_flag = RTE_CRYPTODEV_FF_OUT_OF_PLACE_SGL_IN_FB_OUT;
+
+		if (t->feature_mask && BLOCKCIPHER_TEST_FEATURE_OOP) {
+			if (!(feat_flags & oop_flag)) {
+				printf("Device doesn't support out-of-place "
+					"scatter-gather in input mbuf. "
+					"Test Skipped.\n");
+				return 0;
+			}
+		} else {
+			if (!(feat_flags & RTE_CRYPTODEV_FF_IN_PLACE_SGL)) {
+				printf("Device doesn't support in-place "
+					"scatter-gather mbufs. "
 					"Test Skipped.\n");
-			return 0;
+				return 0;
+			}
 		}
+
 		nb_segs = 3;
 	}
 
