Re: buliding and testing PowerPC KVM

[Jerone Young <jyoung5@us.ibm.com>]

* Sorry was going for paste, and somehow hit send.

So it's actually really easy using cross compiler to build everything. I
use my laptop and then copy over to our nfs root that our boards use. 

Here are some instructions I wrote up for someone earlier. Excuse the
<fill me> parts but it is enough to get you going:

This is a run through of how to build kvmppc kernel & kvm-userspace

You will need (all will have info how to get and install):
	
        - cross tools 
	- zlib
	- Linux kernel with KVM powerpc patches
	- kvm-userspace tools
	

1) Grabbing need tools
=======================

1a) Cross Tools
----------------
	- If you are running on an x86 based machine you need these tools
	- cross tools can be found at:
		http://www.kegel.com/crosstool/crosstool-0.43.tar.gz
	Installation
        ------------
		- Untar tarball and go into folder
		- If you are using Ubuntu linux .. replace /bin/sh symlink:
			sudo ln -sf /bin/bash /bin/sh
		- As root, create folder /opt/crosstool. Then change the
		  permissions to allow everyone write access..this can be done
		  by running:
		  "chmod 777 /opt/crosstool"
		- As a normal user run:
			./demo-powerpc-405.sh
		- Once done you should have directory in that is something like:
			/opt/crosstool/gcc-<version>-glibc-<version>
		- Now you want to add the bin direcotry to your $PATH
	/opt/crosstool/gcc-<version>-glibc-<version>/powerpc-405-linux-gnu/bin
		- Done

1b) Zlib
----------------
	- Now you need to compile a version of Zlib for powerpc
	- This will be used when building qemu while building kvm-userspace
	- zlib source can be found at:
		http://www.zlib.net/zlib-1.2.3.tar.gz
	Installation
	------------
		- Untar tarball and go into folder
		- Type the following in the follwoing.
		  type in:
			CC=powerpc405-linux-gnu-gcc ./configure
		- The run:
			make
		- DO NOT INSTALL
		- You will now want to keep this directory around for later.

1c) Linux kernel with KVM PPC
-----------------------------
	- Currently patches are not upstream yet. You will need to get source
	  from Hollis Blanchard or myself

1d) Kvm-userspace
------------------
	- You will need to get the bleeding edge latest version of
kvm-userspace
	  tools to work for powerpc.
	- To get these you will have to grab them from the git repository.
	- You must first install git tools that can be found here:
		http://git.or.cz/
	- Now you can grab the folder by running the command:
		git clone git://git.kernel.org/pub/scm/virt/kvm/kvm-userspace.git



2) Compiling Linux Kernel with kvm powerpc 
==========================================
	- Untar and go into directory

2a) Compiling a host kernel
---------------------------
	- You will first need to copy over the default configuration for the
board
	  you are running on.
		-For 440EP Bamboo:
			cp arch/powerpc/configs/bamboo_defconfig .config
		-For 440EPx Sequioa:
			cp arch/powerpc/configs/sequoia_defconfig .config
	- Now go into the menuconfiguration with the follwoing command:
		make ARCH=powerpc CROSS_COMPILE=powerpc405-linux-gnu- menuconfig
	- Once in menu, enable menu option  "Virtualization"
	- Then enable Virtualization->Kernel-based Virtual Machine (KVM)
support
	- Also enable Virtualization->KVM guest support for PowerPC 440
	- Save configuration
	- Now to compile your kernel
	  -For 440EP Bamboo:
		- make ARCH=powerpc CROSS_COMPILE=powerpc405-linux-gnu- treeImage
	  -For 440EPx Sequioa:
		- make ARCH=powerpc CROSS_COMPILE=powerpc440-linux-gnu- cuImage

	- Once compilation is done you will find kernel in proper format in
	  arch/powerpc/boot/
	   -For 440EP Bamboo it will be "treeImage"
	   -For 440EPx Sequioa it will be "cuImage"

2b) Compiling a guest kernel for KVM
------------------------------------
	- <will fill in, this is in the process of changing>


3) Builing kvm-userspace
------------------------------------
	- you will need a zlib compiled for powerpc
	- you will need a complied copy of Linux kernel with kvm powerpc

3a) Compiling kvm-userspace
---------------------------
	- Go into kvm-userspace directory
	- To configure kvm-userspace you need to run the follwing command.
	  NOTE to fill in areas where there is <?>:
	  ./configure --arch=powerpc --cross-prefix=powerpc-405-linux-gnu- \
	    --with-patched-kernel --kerneldir=<compiled Linux kernel dir> \
            --disable-sdl --disable-vnc-tls --disable-gfx-check
--disable-gcc-check \
	    --qemu-cflags="-I<zlib dir> -I<compile Linux kernel dir>" \
	    --qemu-ldflags="-L<zlib dir>" \
	    --disable-cpu-emulation

	- Run make
	- Once done you can grab the binary for qemu in:
		qemu/ppcemb-softmmu/qemu-system-ppcemb

	- This is the binary to use.
	<will fill this in more, but again things are changing>

4) Running the code
===================

4a) Load kernel module & setup device node
------------------------------------------
	<fill in>

4b) Running qemu
-----------------
	<fill in>




> 
> On Tue, 2008-03-25 at 18:56 +0200, Avi Kivity wrote:
> > Hollis Blanchard wrote:
> > > On Fri, 2008-03-21 at 13:02 +0200, Avi Kivity wrote:
> > >   
> > >> Other than that, and the few minor comments that popped up, this
> > >> (very 
> > >> nice) patchset will be very easy to merge.  IIRC you mentioned it is 
> > >> possible for me to get an s390 account; this will be very useful in 
> > >> avoiding breaking this port, as happens quite often with ppc and
> > >> ia64.  
> > >> I'd like to be able to do both build and run testing.
> > >>     
> > >
> > > As for building the PowerPC code, cross-compiling is easy with
> > > http://kegel.com/crosstool . There are also a number of servers offering
> > > remote PowerPC ssh access: see http://penguinppc.org/dev/#remote .
> > >
> > >   
> > 
> > I now have a ppc account.  Once you point me at the ppc kernel repo I 
> > can start build testing.
> > 


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