[v3,07/10] dts: add hello world testplan

diff --git a/dts/test_plans/hello_world_test_plan.rst b/dts/test_plans/hello_world_test_plan.rst
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+.. SPDX-License-Identifier: BSD-3-Clause
+   Copyright(c) 2010-2017 Intel Corporation
+
+=============================================
+Sample Application Tests: Hello World Example
+=============================================
+
+This example is one of the most simple RTE application that can be
+done. The program will just print a "helloworld" message on every
+enabled lcore.
+
+Command Usage::
+
+  ./dpdk-helloworld -c COREMASK [-m NB] [-r NUM] [-n NUM]
+
+    EAL option list:
+      -c COREMASK: hexadecimal bitmask of cores we are running on
+      -m MB      : memory to allocate (default = size of hugemem)
+      -n NUM     : force number of memory channels (don't detect)
+      -r NUM     : force number of memory ranks (don't detect)
+      --huge-file: base filename for hugetlbfs entries
+    debug options:
+      --no-huge  : use malloc instead of hugetlbfs
+      --no-pci   : disable pci
+      --no-hpet  : disable hpet
+      --no-shconf: no shared config (mmap'd files)
+
+
+Prerequisites
+=============
+
+Support igb_uio and vfio driver, if used vfio, kernel need 3.6+ and enable vt-d in bios.
+When used vfio , used "modprobe vfio" and "modprobe vfio-pci" insmod vfio driver, then used
+"./tools/dpdk_nic_bind.py --bind=vfio-pci device_bus_id" to bind vfio driver to test driver.
+
+To find out the mapping of lcores (processor) to core id and socket (physical
+id), the command below can be used::
+
+  $ grep "processor\|physical id\|core id\|^$" /proc/cpuinfo
+
+The total logical core number will be used as ``helloworld`` input parameters.
+
+
+Test Case: run hello world on single lcores
+===========================================
+
+To run example in single lcore ::
+
+  $ ./dpdk-helloworld -c 1
+    hello from core 0
+
+Check the output is exact the lcore 0
+
+
+Test Case: run hello world on every lcores
+==========================================
+
+To run the example in all the enabled lcore ::
+
+  $ ./dpdk-helloworld -cffffff
+    hello from core 1
+    hello from core 2
+    hello from core 3
+           ...
+           ...
+    hello from core 0
+
+Verify the output of according to all the core masks.