[dpdk-dev] [PATCH 4/4] doc/qat: document libcrypto detection

[Tomasz Jozwiak <tomaszx.jozwiak@intel.com>]

Signed-off-by: Tomasz Jozwiak <tomaszx.jozwiak@intel.com>
Acked-by: Fiona Trahe <fiona.trahe@intel.com>
---
 doc/guides/cryptodevs/qat.rst | 9 +++++++--
 1 file changed, 7 insertions(+), 2 deletions(-)

diff --git a/doc/guides/cryptodevs/qat.rst b/doc/guides/cryptodevs/qat.rst
index 77f8362..fa23a56 100644
--- a/doc/guides/cryptodevs/qat.rst
+++ b/doc/guides/cryptodevs/qat.rst
@@ -71,7 +71,10 @@ Limitations
 Installation
 ------------
 
-To enable QAT in DPDK, follow the instructions for modifying the compile-time
+QAT PMD is enabled by default in DPDK, but depends on libcrypto. If this library is detected
+the driver will be enabled and compiled.
+
+To setup QAT in DPDK, follow the instructions for modifying the compile-time
 configuration file as described `here <http://dpdk.org/doc/guides/linux_gsg/build_dpdk.html>`_.
 
 Quick instructions are as follows:
@@ -80,9 +83,11 @@ Quick instructions are as follows:
 
 	cd to the top-level DPDK directory
 	make config T=x86_64-native-linuxapp-gcc
-	sed -i 's,\(CONFIG_RTE_LIBRTE_PMD_QAT\)=n,\1=y,' build/.config
 	make
 
+.. Note::
+    To libcrypto detection - pkg_config is needed and should be installed in the system.
+
 To use the DPDK QAT PMD an SRIOV-enabled QAT kernel driver is required. The VF
 devices exposed by this driver will be used by the QAT PMD. The devices and
 available kernel drivers and device ids are :
-- 
2.7.4