\vspace{0.5in}
Palacios Internal Developer Manual
}
-\author{Jack Lange}
+
\maketitle
This manual is written for Internal Palacios developers. It contains
information on how to obtain the palacios code base, how to go about
the development process, and how to commit those changes to the
-mainline source tree. For in depth information on the palacios code
-structure please see {\em An Introduction to the Palacios Virtual
-Machine Monitor -- Release 1.0}.
+mainline source tree. This assumes that the reader has read {\em An
+Introduction to the Palacios Virtual Machine Monitor -- Release 1.0}
+and also has a slight working knowledge of {\em git}.
\section{Overview}
that process in Section~\ref{sec:submission}.
-\subsection{Palacios}
+\section{Checking out Palacios}
+The central palacios repository is located on {\em
+newskysaw.cs.northwestern.edu} in {\em /home/palacios/palacios}. All
+internal developers have read access to the directory. Each developer
+must create their own local version of the repository, this is done
+with {\em git clone}.
-The central palacios repository
+\begin{verbatim}
+git clone /home/palacios/palacios
+\end{verbatim}
-\includegraphics[height=3.5in]{dev_chart.pdf}
+This creates a local copy of the repository at {\em ./palacios/}.
-\subsection{Kitten}
-\section{Checking out Palacios}
+All development work is done in the {\em devel} branch of the
+repository. The developer can access this branch via:
+
+\begin{verbatim}
+git checkout --track -b devel origin/devel
+\end{verbatim}
+
+or
+
+\begin{verbatim}
+/opt/vmm-tools/bin/checkout_branch devel
+\end{verbatim}
+
+{\em Important:}
+Note that palacios is very actively developed so the contents of the
+{\em devel} branch are frequently changing. In order to keep up to
+date with the latest version, it is necessary to periodically pull the
+latest changes from the master repository by running \verb.git pull..
-Checkout or clone the devel branch of Palacios from the master
-repository. You should have the read permission to these branches.
\section{Checking out Kitten}
-hg clone /home/palacios/kitten
+Kitten is available from Sandia National Labs, and is the main host OS
+we are targetting with Palacios. Loosely speaking core Palacios
+developers are internal Kitten developers, and internal Palacios
+developers are external Kitten developers. Because we have limited
+access to the Kitten repository, we are maintaining a local mirror
+copy in {\em /home/palacios/kitten}.
-git clone /home/palacios/palacios
+Kitten uses Mercurial for their source management, so you will have to
+make sure the local mercurial version is configured correctly.
+Specifically you should add the following python path to your shell environment.
-/opt/vmm-tools/bin/checkout\_branch devel
+\begin{verbatim}
+export PYTHONPATH=/usr/local/lib64/python2.4/site-packages/
+\end{verbatim}
+You can then clone Kitten from the local mirror:
+\begin{verbatim}
+hg clone /home/palacios/kitten
+\end{verbatim}
+
+Both the Kitten and Palacios clone commands should be run from the
+same direcotyr. This means that both repositories should be located at
+the same directory level. The Kitten build process depends on this.
+
+{\em Important:} Like Palacios, Kitten is very actively developed so
+source tree is frequently changing. In order to keep up to date with
+the latest version, it is necessary to periodically pull the latest
+changes from the mirror repository by running \verb.hg pull. followed
+by \verb.hg update..
\section{Compiling Palacios}
-cd palacios/build/
+Palacios is capable of targeting 32 and 64 bit operating systems, and
+includes a build process that supports both these
+architectures. Furthermore, Palacios has multiple build locations,
+with multiple makefiles: a top level build directory and a Palacios
+specific build directory. The Palacios build process first generates a
+static library that includes the Palacios VMM. This static library is
+then linked into a host operating system. Palacios internally supports
+GeekOS and can generate a complete OS image via a unified build
+process. To combine Palacios with Kitten, it is necessary to first
+compile Palacios and then to compile Kitten externally link it with
+Palacios. The output of the compilation process is a bit more complex
+and generates multiple binaries, and the specifics can be found in the
+Makefiles.
+
+The top level build directory provides a number of high level make
+targets, and is located in {\em palacios/build/}. It supports building
+32 and 64 bit versions of the Palacios library independently as well
+as building an integrated version of GeekOS. The basic targets are:
+\begin{itemize}
+\item \verb.make palacios-full32. -- Generates a 32 bit version of the Palacios static library
+\item \verb.make palacios-full64. -- Generates a 64 bit version of the
+Palacios static library
+\item \verb.make geekos. -- Compiles the GeekOS kernel, and link it with the
+Palacios static library
+\item \verb.make geekos-iso. -- Generate an ISO boot disk image from the
+GeekOS kernel that has been compiled
+\end{itemize}
+
+The second build directory is located at {\em palacios/palacios/build}
+and handles only the Palacios compilation process. It supports a
+differnt set of targets and arguments:
+\begin{itemize}
+\item \verb.make ARCH=32. -- iteratively compiles a 32 bit version of Palacios
+\item \verb.make ARCH=64. -- iteratively compiles a 64 bit version of
+Palacios
+\item \verb.make ARCH=32 world. -- fully recompiles a 32 bit version of
+Palacios
+\item \verb.make ARCH=64 world. -- fully recompiles a 64 bit version of
+Palacios
+\end{itemize}
+Both build levels support compilation directives that control the
+debugging messages that are generated by Palacios. These are specified
+by appending a \verb.DEBUG_<COMPONENT>=1. to the end of the
+\verb.make. command. The components that are currently supported are:
+\begin{itemize}
+\item \verb.DEBUG_ALL=1. -- enables debugging for all the VMM components
+({\em Warning:} this generates a {\em lot} of debug information.
+\item \verb.DEBUG_SHADOW_PAGING=1.
+\item \verb.DEBUG_CTRL_REGS=1.
+\item \verb.DEBUG_INTERRUPTS=1.
+\item \verb.DEBUG_IO=1.
+\item \verb.DEBUG_KEYBOARD=1.
+\item \verb.DEBUG_PIC=1.
+\item \verb.DEBUG_PIT=1.
+\item \verb.DEBUG_NVRAM=1.
+\item \verb.DEBUG_GENERIC=1.
+\item \verb.DEBUG_EMULATOR=1.
+\item \verb.DEBUG_RAMDISK=1.
+\item \verb.DEBUG_XED=1.
+\item \verb.DEBUG_HALT=1.
+\item \verb.DEBUG_DEV_MGR=1.
+\item \verb.DEBUG_APIC=1.
+\end{itemize}
-This will build Palacios as a library, libv3vee.a in the palacios/palacios/build/.
\section{Compiling Kitten}
+Kitten requires a 64 bit version of Palacios, so make sure that
+Palacios has been correctly compiled before compiling Kitten.
+
\subsection{Configuration}
-Kitten building can be configured by either text or graph configure interface, which is similar to the Linux kernel configure, By one of the following commands:
+Kitten borrows a lot of concepts from Linux, including the Linux build
+process. As such it must be configured before it is actually compiled.
+The Kitten configuration process is the same as Linux, and can be
+accessed via any of these make targets.
+\begin{itemize}
+\item \verb.make xconfig.
+\item \verb.make config.
+\item \verb.make menuconfig.
+\end{itemize}
-make xconfig
-make config
-make menuconfig
+There are some specific configuration options that should be disabled
+to work with Palacios. Because Palacios is configured by default to
+provide a guest with direct access to the VGA console, the {\em VGA
+console} device driver should be disbabled in the Kitten
+configuration. Similarly the {\em VM console} driver should be
+disabled as well.
-Make sure turn on the network device driver, networking, and input kernel command 'console=serial net=rtl8139'
-\subsection{Compilation}
+Furthermore, because the VGA console is not being used the {\em Kernel
+Command Line Arguments} must be modified to remove the {\em VGA}
+device from the console list.
+
+The guest OS that is booted as a VM is included as an ISO image in raw
+binary format inside Kitten's {\em init\_task}. To change the guest
+ISO, you must change the makefile for the init\_task. This is located
+in {\em user/hello\_world/Makefile} and the syntax is well commented.
+On {\em newskysaw} a collection of guest ISO images are located in
+{\em /opt/vmm-tools/isos/}.
-Build Palacios as a module for Kitten
-In the first time, make sure to build Kitten before you building the Palacios as the module to kitten.
-Palacios now is built as a module of the Kitten. You can find the palacios.c and palacios.h in the kitten/palacios/. Enter the directory, build the palacios module.
-cd kitten/palacios
+\subsection{Compilation}
+After Kitten has been configured the compilation can be done. The
+general process is to compile a reference build of Kitten, followed by
+compiling Palacios support as a kernel module, and then doing a new
+full recompilation of Kitten.
+
+The specific compilation steps are run from the top level Kitten directory:
+\begin{verbatim}
+make
+cd palacios
make -C .. M=`pwd`
cp built-in.o ../modules/palacios-mod.o
-Build Kitten
-Go back to kitten root directory, and build the Kitten again.
+cd ..
+make
+make isoimage
+\end{verbatim}
+
+This generates an ISO boot image containing Kitten, Palacios, and the
+guest that will be run as a VM. The ISO image is located at {\em
+./arch/x86\_64/boot/image.iso}.
-make isoimage
\section{Running Palacios/Kitten}
-Run the whole stuff built above in Qemu using following command:
+Kitten and Palacios are capable of running under Qemu, which makes
+debugging much simpler.
+
+The basic form of the command to start the Qemu emulator is:
+\begin{verbatim}
+/usr/local/qemu/bin/qemu-system-x86_64 -smp 1 -m 1024 \
+ -serial file:./serial.out \
+ -cdrom ./arch/x86_64/boot/image.iso \
+ < /dev/null
+\end{verbatim}
+
+The command starts up a single processor emulated machine, with 1gig
+of RAM and a cdrom drive loaded with the Kitten ISO image. Furthermore
+all output to the serial port is written directly to a file called
+{\em serial.out}. This command can be copied into a shell script for easy access.
+
+\section{Development Guidelines}
+
+32/64 bit compatibility
+name space
+coding guidelines
+
+
+\section{Code Submission}
+\label{sec:submission}
+\subsection{Palacios}
+
+\includegraphics[height=3.5in]{dev_chart.pdf}
+
+stacked git
-/usr/local/qemu/bin/qemu-system-x86\_64 -smp 1 -m 1024 -serial file:./serial.out -cdrom ./arch/x86\_64/boot/image.iso -net tap, ifname=tap0 < /dev/null
+\subsection{Kitten}
+mercurial queues
\section{Networking}
\subsection{Configuring Kitten}
+To enable networking in Qemu, networking needs to be enabled in the configuration.
+
+Make sure turn on the network device driver, networking, and input
+kernel command 'console=serial net=rtl8139'
+
How to set ip address in kitten:
Kitten ip address setting is in file drivers/net/ne2k/rtl8139.c, in the code below which is located in function rtl8139\_init.
-\section{Code Submission}
-\label{sec:submission}
-\subsection{Palacios}
-\subsection{Kitten}
For more questions, talk to Jack or Lei.
