[spp] [PATCH 1/3] docs: add how to install qemu 2.7

[x-fn-spp@sl.ntt-tx.co.jp]

From: Hiroyuki Nakamura <nakamura.hiroyuki@po.ntt-tx.co.jp>

This commit adds instruction about how to install qemu 2.7 in case
user does not have the version of qemu.

Signed-off-by: Hiroyuki Nakamura <nakamura.hiroyuki@po.ntt-tx.co.jp>
Signed-off-by: Naoki Takada <takada.naoki@lab.ntt.co.jp>
---
 docs/guides/spp_vf/gsg/build.rst | 14 +++++++++++++-
 1 file changed, 13 insertions(+), 1 deletion(-)

diff --git a/docs/guides/spp_vf/gsg/build.rst b/docs/guides/spp_vf/gsg/build.rst
index 573d6be..93132d4 100644
--- a/docs/guides/spp_vf/gsg/build.rst
+++ b/docs/guides/spp_vf/gsg/build.rst
@@ -37,7 +37,7 @@ Environment
 -----------
 
 * Ubuntu 16.04
-* qemu-kvm 2.7 or later
+* qemu-kvm 2.7 or later(if you use vhost reconnect feature described in 3.2.3)
 * DPDK v17.11 or later
 
 
@@ -165,6 +165,18 @@ Then, bind it with PCI_Number.
 
 virsh setup
 -----------
+First of all, please check version of qemu-kvm.
+
+.. code-block:: console
+
+ $ qemu-system-x86_64 --version
+
+If your system does not have qemu-kvm or the version of qemu is less than 2.7,
+then please install qemu following the instruction of https://wiki.qemu.org/index.php/Hosts/Linux
+to install qemu 2.7.
+You may need to install libvirt-bin, virtinst, bridge-utils packages via ``apt-get`` install to run ``virt-install``.
+
+
 ``virsh`` is a command line interface that can be used to create, destroy, stop start and edit VMs and configure. After create an image file, you can setup it with ``virt-install``.
 
 .. code-block:: console
-- 
2.7.4