Kernel Build 　　

1. Compile kernel

1.1 download code

https://www.kernel.org/

git clone git://vt-sync.sh.intel.com/linux.git

1.2 compile kernel

cd linux/
cp /boot/config-* .config

make -j 32
make modules_install && make install

2. grub

2.1 modify grub

under /etc/default/grub, append “console=tty0 console=ttyS0,115200 no_timer_check intel_iommu=on 3” to GRUB_CMDLINE_LINUX.

2,2 update grub

grub2-mkconfig -o /boot/efi/EFI/redhat/grub.cfg

3. guest kernel compile

3.1 create build image

qemu-img create -f raw kernel_build.img 15G

3.2 create vm

$ vim xl.hvm

builder = "hvm"
name = "vm2"
memory = 4096
vcpus = 32
vif = [ 'type=ioemu, mac=22:16:3e:10:9f:a7, bridge=xenbr0' ]
disk = [ '/root/jl/pmu_xen.qcow2,qcow2,hda,rw', '/root/kernel.img,raw,hdb,rw' ]
device_model_override = '/usr/local/lib/xen/bin/qemu-system-i386'
device_model_version = 'qemu-xen'
sdl=0
vnc=1
stdvga=1
hap=1
acpi=1
gfx_passthru=0
hpet=1
serial='pty'

$ xl create xl.hvm

3.3 mount build disk

mkfs.ext4 /dev/xvdb
mount /dev/xvdb /root/xvdb
cd /root/xvdb

then compile kernel

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