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andyhhp x86/hvm: Corrections and improvements to unhandled vmexit logging
 * Use gprintk rather than gdprintk.  These logging messages shouldn't
   disappear in release builds, as they usually happen immediately before a
   domain crash.  Raise them from WARNING to ERR.
 * Format the vmexit reason in the same base as is used in the vendor
   manuals (decimal for Intel, hex for AMD), and consistently use 0x for hex
   numbers.
 * Consistently use "Unexpected vmexit" terminology.

In particular, this corrects the information printed for nested VT-x, and
actually prints information for nested SVM.

Signed-off-by: Andrew Cooper <andrew.cooper3@citrix.com>
Reviewed-by: Boris Ostrovsky <boris.ostrovsky@oracle.com>
Reviewed-by: Jan Beulich <jbeulich@suse.com>
Reviewed-by: Kevin Tian <kevin.tian@intel.com>
Release-acked-by: Julien Grall <julien.grall@arm.com>
Latest commit ef3e8db Apr 19, 2017
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config xen/arm: Remove build option CONFIG_LOAD_ADDRESS Feb 16, 2017
docs paths.m4: provide XENSTORED_{KVA,PORT} Apr 20, 2017
m4 paths.m4: provide XENSTORED_{KVA,PORT} Apr 20, 2017
misc misc/release-checklist.txt: Try to avoid wrong-tag mistakes Apr 12, 2017
scripts get_maintainer.pl: Teach brace expansion Jan 10, 2017
stubdom tools,stubdom: set PKG_CONFIG_DIR in main Makefiles Mar 14, 2017
tools hotplug/FreeBSD: configure xenstored Apr 20, 2017
unmodified_drivers/linux-2.6 unmodified_drivers: enable use of register_oldmem_pfn_is_ram() API Apr 4, 2016
xen x86/hvm: Corrections and improvements to unhandled vmexit logging Apr 21, 2017
.bk-to-hg bitkeeper revision 1.1159.1.275 (417d602cyKuqblSyKliOgatz5hdcRw) Oct 25, 2004
.gitarchive-info git: Add metadata to the result of `git archive` Nov 4, 2016
.gitattributes git: Add metadata to the result of `git archive` Nov 4, 2016
.gitignore xen: introduce a C99 headers check Apr 5, 2017
.hg-to-bk bitkeeper revision 1.1159.1.275 (417d602cyKuqblSyKliOgatz5hdcRw) Oct 25, 2004
.hgignore Revert "tools: remove blktap2 related code and documentation" Sep 8, 2016
.hgsigs Added signature for changeset 68640a3c99ce Sep 7, 2012
.hgtags Added tag 4.2.0-branched for changeset 528f0708b6db Sep 7, 2012
.rootkeys bitkeeper revision 1.1780 (42c3a8c4tqEOpGy663gWO35k5QwZTw) Jun 30, 2005
.travis.yml travis: Add checkpolicy to the list of packages Jul 15, 2016
CODING_STYLE CODING_STYLE: Allow single-sentence comments without full stops Aug 8, 2016
CONTRIBUTING CONTRIBUTING: list xl in inbound license section Mar 2, 2017
COPYING Remove ambiguities in the COPYING file; add CONTRIBUTING file Sep 9, 2016
CREDITS CREDITS: First checkin. Feb 26, 2013
Config.mk Config.mk: Update for 4.9.0-rc1.2 Apr 12, 2017
INSTALL INSTALL: remove stale lto build instruction Dec 23, 2016
MAINTAINERS MAINTAINERS: Move the x86 instruction emulator under x86 maintainership Apr 6, 2017
Makefile build system: don't let install-stubdom depend on install-tools Dec 3, 2016
README Config.mk, etc.: Prepare 4.9.0-rc1 Apr 12, 2017
autogen.sh autoconf: xen: force a refresh with autoconf Jul 2, 2014
config.guess tools: update config.{sub,guess} Mar 14, 2014
config.sub tools: update config.{sub,guess} Mar 14, 2014
configure paths.m4: provide XENSTORED_{KVA,PORT} Apr 20, 2017
configure.ac build: Honor '--enable-githttp' in toplevel Makefile generation May 5, 2016
install.sh install.sh: Preserve permissions from make install Sep 23, 2014
version.sh build: add autoconf to replace custom checks in tools/check Feb 22, 2012

README

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http://www.xen.org/

What is Xen?
============

Xen is a Virtual Machine Monitor (VMM) originally developed by the
Systems Research Group of the University of Cambridge Computer
Laboratory, as part of the UK-EPSRC funded XenoServers project.  Xen
is freely-distributable Open Source software, released under the GNU
GPL. Since its initial public release, Xen has grown a large
development community, spearheaded by xen.org (http://www.xen.org).

This file contains some quick-start instructions to install Xen on
your system. For more information see http:/www.xen.org/ and
http://wiki.xen.org/

Quick-Start Guide
=================

First, this is just a quick-start guide. For more comprehensive
information see the INSTALL file and the Xen wiki at
http://wiki.xenproject.org and in particular
http://wiki.xenproject.org/wiki/Getting_Started.

Second, there are a number of prerequisites for building a Xen source
release. Make sure you have all the following installed, either by
visiting the project webpage or installing a pre-built package
provided by your OS distributor:
    * GNU Make v3.80 or later
    * C compiler and linker:
      - For x86:
        - GCC 4.1.2_20070115 or later
        - GNU Binutils 2.16.91.0.5 or later
        or
        - Clang/LLVM 3.5 or later
      - For ARM:
        - GCC 4.8 or later
        - GNU Binutils 2.24 or later
    * Development install of zlib (e.g., zlib-dev)
    * Development install of Python v2.3 or later (e.g., python-dev)
    * Development install of curses (e.g., libncurses-dev)
    * Development install of openssl (e.g., openssl-dev)
    * Development install of x11 (e.g. xorg-x11-dev)
    * Development install of uuid (e.g. uuid-dev)
    * Development install of yajl (e.g. libyajl-dev)
    * Development install of libaio (e.g. libaio-dev) version 0.3.107 or
      greater.
    * Development install of GLib v2.0 (e.g. libglib2.0-dev)
    * Development install of Pixman (e.g. libpixman-1-dev)
    * pkg-config
    * bridge-utils package (/sbin/brctl)
    * iproute package (/sbin/ip)
    * GNU bison and GNU flex
    * GNU gettext
    * ACPI ASL compiler (iasl)
    * Libc multiarch package (e.g. libc6-dev-i386 / glibc-devel.i686).
      Required when building on a 64-bit platform to build
      32-bit components which are enabled on a default build.

In addition to the above there are a number of optional build
prerequisites. Omitting these will cause the related features to be
disabled at compile time:
    * Development install of Ocaml (e.g. ocaml-nox and
      ocaml-findlib). Required to build ocaml components which
      includes the alternative ocaml xenstored.
    * cmake (if building vtpm stub domains)
    * markdown
    * figlet (for generating the traditional Xen start of day banner)
    * systemd daemon development files
    * Development install of libnl3 (e.g., libnl-3-200,
      libnl-3-dev, etc).  Required if network buffering is desired
      when using Remus with libxl.  See docs/README.remus for detailed
      information.
    * 16-bit x86 assembler, loader and compiler for qemu-traditional / rombios
      (dev86 rpm or bin86 & bcc debs)
    * Development install of liblzma for rombios

Second, you need to acquire a suitable kernel for use in domain 0. If
possible you should use a kernel provided by your OS distributor. If
no suitable kernel is available from your OS distributor then refer to
http://wiki.xen.org/wiki/XenDom0Kernels for suggestions for
suitable kernels to use.
If you are looking to compile a Dom0 kernel from source, please refer to
http://wiki.xen.org/wiki/XenParavirtOps.

[NB. Unless noted otherwise, all the following steps should be
performed with root privileges.]

1. Download and untar the source tarball file. This will be a
   file named xen-unstable-src.tgz, or xen-$version-src.tgz.
   You can also pull the current version from the git or mercurial
   repositories at http://xenbits.xen.org/

    # tar xzf xen-unstable-src.tgz

   Assuming you are using the unstable tree, this will
   untar into xen-unstable. The rest of the instructions
   use the unstable tree as an example, substitute the
   version for unstable.

2. cd to xen-unstable (or whatever you sensibly rename it to).

3. For the very first build, or if you want to destroy build trees,
   perform the following steps:

    # ./configure
    # make world
    # make install

   See the documentation in the INSTALL file for more info.

   This will create and install onto the local machine. It will build
   the xen binary (xen.gz), the tools and the documentation.

   You can override the destination for make install by setting DESTDIR
   to some value.

4. To rebuild an existing tree without modifying the config:
    # make dist

   This will build and install xen, tools, and docs into the local dist/
   directory.

   You can override the destination for make install by setting DISTDIR
   to some value.

   make install and make dist differ in that make install does the
   right things for your local machine (installing the appropriate
   version of udev scripts, for example), but make dist includes all
   versions of those scripts, so that you can copy the dist directory
   to another machine and install from that distribution.

xenstore: xenstored and oxenstored
====================================

Xen uses a configuration database called xenstore [0] to maintain configuration
and status information shared between domains. A daemon is implemented as part
of xenstore to act as an interface for access to the database for dom0 and
guests. Two xenstored daemons are supported, one written in C which we refer
to as the xenstored (sometimes referred to as cxenstored), and another written
in Ocaml called oxenstored. Details for xenstore and the different
implementations can be found on the wiki's xenstore reference guide [1] and
the xenstored [2] page. You can choose which xenstore you want to enable as
default on a system through configure:

	./configure --with-xenstored=xenstored
	./configure --with-xenstored=oxenstored

By default oxenstored will be used if the ocaml development tools are found.
If you enable oxenstored the xenstored will still be built and installed,
the xenstored used can be changed through the configuration file:

/etc/sysconfig/xencommons
or
/etc/default/xencommons

You can change the preferred xenstored you want to use in the configuration
but since we cannot stop the daemon a reboot will be required to make the
change take effect.

[0] http://wiki.xen.org/wiki/XenStore
[1] http://wiki.xen.org/wiki/XenStoreReference
[2] http://wiki.xen.org/wiki/Xenstored

Python Runtime Libraries
========================

Various tools, such as pygrub, have the following runtime dependencies:

    * Python 2.3 or later.
          URL:    http://www.python.org/
          Debian: python

Intel(R) Trusted Execution Technology Support
=============================================

Intel's technology for safer computing, Intel(R) Trusted Execution Technology
(Intel(R) TXT), defines platform-level enhancements that provide the building
blocks for creating trusted platforms.  For more information, see
http://www.intel.com/technology/security/.

Intel(R) TXT support is provided by the Trusted Boot (tboot) module in
conjunction with minimal logic in the Xen hypervisor.

Tboot is an open source, pre- kernel/VMM module that uses Intel(R) TXT to
perform a measured and verified launch of an OS kernel/VMM.

The Trusted Boot module is available from
http://sourceforge.net/projects/tboot.  This project hosts the code in a
mercurial repo at http://tboot.sourceforge.net/hg/tboot.hg and contains
tarballs of the source.  Instructions in the tboot README describe how
to modify grub.conf to use tboot to launch Xen.

There are optional targets as part of Xen's top-level makefile that will
download and build tboot: install-tboot, build-tboot, dist-tboot, clean-tboot.
These will download the latest tar file from the SourceForge site using wget,
then build/install/dist according to Xen's settings.