sed -i '/disk/s/xvda/hda/g' tools/examples/xlexample.hvm
sed -i '/disk/s/xvda/hda/g' tools/examples/xlexample.pvlinux

sed -i 's$OVMF_UPSTREAM_URL ?=.*$OVMF_UPSTREAM_URL=git://vt-sync/ovmf.git$' ./Config.mk
sed -i 's$QEMU_TRADITIONAL_URL ?=.*$QEMU_TRADITIONAL_URL=git://vt-sync/qemu-xen-traditional.git$' ./Config.mk
sed -i 's$QEMU_UPSTREAM_URL ?=.*$QEMU_UPSTREAM_URL ?= git://vt-sync/qemu-xen.git$' ./Config.mk
sed -i 's$SEABIOS_UPSTREAM_URL ?=.*$SEABIOS_UPSTREAM_URL ?= git://vt-sync/seabios.git$' ./Config.mk
sed -i 's$MINIOS_UPSTREAM_URL ?=.*$MINIOS_UPSTREAM_URL ?= git://vt-sync/mini-os.git$' ./Config.mk
sed -i 's/3403ac4313812752be6e6aac35239ca6888a8cab/2e11d582b5e14759b3c1482d7e317b4a7257e77d/' ./Config.mk

[root@vt xen]#make xen -j $num_cpu  # ‘-j $num_cpu’ 
. Make tools, install xen & tools  
[root@vt xen-unstable.hg]#make tools -j $num_cpu  
[root@vt xen-unstable.hg]#make install-xen  
[root@vt xen-unstable.hg]#make install-tools 
. Verify. After finishing installing xen & tools, new files are generated in /boot directory
[root@vt xen-unstable.hg]#cd /boot 
[root@vt-ivt1 boot]#ll -tr 

-rw-r--r--. 1 root root 13313173 May 24 21:19 xen-syms-4.6-unstable 
-rw-r--r--. 1 root root   793467 May 24 21:19 xen-4.6-unstable.gz 
lrwxrwxrwx. 1 root root       19 May 24 21:19 xen-4.6.gz -> xen-4.6-unstable.gz 
lrwxrwxrwx. 1 root root       19 May 24 21:19 xen.gz -> xen-4.6-unstable.gz 

[root@vt boot]#cd /home/build/ 
[root@vt build]#git clone git://vt-sync.sh.intel.com/linux-stable.git  
. Down latest kernel config file, and rename it to /home/build/linux/.config config-3.9.3--its a example configure file

[root@vt build]#scp xen-build.sh.intel.com:/home/build/repo/config-example linux-stable/.config 
[root@vt build]#cd linux-stable 
[root@vt linux-stable]#echo "" | make oldconfig  
[root@vt linux-stable]#make -j 32 
[root@vt linux-stable]#make modules_install  
[root@vt linux-stable]#make install  
. Verify. After finishing installing dom0, new files are generated in /boot directory
[root@vt linux]cd /boot 
[root@vt boot]ll -tr 
-rw-r--r--. 1 root root  5084960 May 24 22:26 vmlinuz-4.1.1
-rw-r--r--. 1 root root  2483412 May 24 22:26 System.map-4.1.1 
lrwxrwxrwx. 1 root root       20 May 24 22:26 vmlinuz -> /boot/vmlinuz-4.1.1
lrwxrwxrwx. 1 root root       23 May 24 22:26 System.map -> /boot/System.map-4.1.1 
-rw-r--r--. 1 root root  4863943 May 24 22:26 initramfs-4.1.1.img 

title Red Hat Enterprise Linux (2.6.32-431.el6.x86_64)         
root (hd0,0)         
kernel /boot/vmlinuz-2.6.32-431.el6.x86_64 ro root=UUID=aacf436a-d293-4e69-a43d-e5de0348bcdd 3 console=ttyS0,115200,8n1         
initrd /boot/initramfs-2.6.32-431.el6.x86_64.img 

The grub ‘Red Hat Enterprise Linux Server (3.9.3)’ is auto generated when install Linux kernel. Then add grub ‘xen-32e’ as follows:
[root@knl1 ~]# cat /boot/grub/grub.conf
default=0timeout=5splashimage=(hd0,0)/grub/splash.xpm.gz
hiddenmenu
title Xen-4.7
    root (hd0,0)
    kernel /xen.gz dom0_mem=4096M loglvl=all guest_loglvl=all unrestricted_guest=1 msi=1 console=com1,115200,8n1 sync_console hap_1gb=1 conring                                                                      _size=128M psr=cmt psr=cat
    module /vmlinuz-xen ro root=/dev/mapper/vg_knl1-lv_root rd_NO_LUKS LANG=en_US.UTF-8 rd_LVM_LV=vg_knl1/lv_root rd_NO_MD SYSFONT=latarcyrheb-                                                                      sun16 crashkernel=auto rd_LVM_LV=vg_knl1/lv_swap  KEYBOARDTYPE=pc KEYTABLE=us rd_NO_DM rhgb quiet,115200,8n1
    module /initrd-xen.img
title Red Hat Enterprise Linux 6 (2.6.32-573.el6.x86_64)
    root (hd0,0)
    kernel /vmlinuz-2.6.32-573.el6.x86_64 ro root=/dev/mapper/vg_knl1-lv_root rd_NO_LUKS LANG=en_US.UTF-8 rd_LVM_LV=vg_knl1/lv_root rd_NO_MD SY                                                                      SFONT=latarcyrheb-sun16 crashkernel=auto rd_LVM_LV=vg_knl1/lv_swap  KEYBOARDTYPE=pc KEYTABLE=us rd_NO_DM rhgb quiet
    initrd /initramfs-2.6.32-573.el6.x86_64.img

./configure --target-list=i386-softmmu  --enable-xen --enable-xen-pci-passthrough
make -j8
make install

device_model_override = '/usr/local/bin/qemu-system-i386'
device_model_version = 'qemu-xen'

# wget http://vmm-build.sh.intel.com/curia/xen-unstable_75da1b15_20170219-1.x86_64.rpm
# rpm -ivh xen-unstable_75da1b15_20170219-1.x86_64.rpm

[root@vt /]#echo "/usr/local/lib" >>/etc/ld.so.conf
[root@vt /]#ldconfig
[root@vt /]# /etc/init.d/xencommons start 
we also can put 3 command to /etc/rc.d/rc.local, then give rc.local execute(chmod +x /etc/rc.d/rc.local)

[root@vt-ivt1 ~]# xl list
Name                                        ID   Mem VCPUs      State   Time(s)
Domain-0                                     0  4095    32     r-----   15918.0

[root@ localhost /]# xl info 
host                   : vt-ivt1
release                : 4.1.0
version                : #1 SMP Mon Jun 29 14:48:41 CST 2015
machine                : x86_64
nr_cpus                : 32
......

[root@ localhost /]# xl create rhel7.conf

eth0 config
[root@knl2 network-scripts]# cat ifcfg-eth0
DEVICE=eth0
TYPE=Ethernet
UUID=dbe2f97c-fe08-4a4d-925a-a409b49e543d
ONBOOT=yes
NM_CONTROLLED=no
BOOTPROTO=none
HWADDR=00:1E:67:F9:AA:40
DEFROUTE=no
PEERDNS=yes
PEERROUTES=yes
IPV4_FAILURE_FATAL=yes
IPV6INIT=no
NAME="System eth0"
BRIDGE=xenbr0

br0 config
[root@knl2 network-scripts]# cat ifcfg-xenbr0
DEVICE=xenbr0
TYPE=Bridge
ONBOOT=yes
NM_CONTROLLED=no
BOOTPROTO=dhcp
IPV4_FAILURE_FATAL=yes
IPV6INIT=no

$qemu-system-x86_64 -m 512 -smp 2 -hda /path/to/your/image -serial pty
$cat /dev/pts/$num

serial='pty'

delete "rhgb quiet"
add "console=ttyS0,115200,8n1"

xl console domid

[root@skl-2s1 ~]# xl list
xencall: error: Could not obtain handle on privileged command interface: No such file or directory
libxl: error: libxl.c:108:libxl_ctx_alloc: cannot open libxc handle: No such file or directory
cannot init xl context