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Re: [Xen-users] Running x86_64, but getting a 32-bit hypervisor

To: Eric McClelland <xen-users@xxxxxxxxxx>
Subject: Re: [Xen-users] Running x86_64, but getting a 32-bit hypervisor
From: Andrew Lyon <andrew.lyon@xxxxxxxxx>
Date: Sun, 24 May 2009 13:34:05 +0100
Cc: xen-users@xxxxxxxxxxxxxxxxxxx
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On Tue, May 19, 2009 at 12:52 AM, Eric McClelland <xen-users@xxxxxxxxxx> wrote:
> Hello,
> I've been running Xen with 32-bit dom0s and domUs for a little over a year 
> now (good stuff!), and have just started moving to x86_64.  Starting from an 
> x86_64 non-Xen Gentoo installation, I've built the necessary packages using 
> Gentoo's Portage, but find that the resulting hypervisor is only 32-bit, 
> which I presume to be the underlying reason it won't boot the 64-bit dom0. 
>  I'm trying to figure out what is preventing me from getting a 64-bit 
> hypervisor.
> Interestingly, the xen-syms-3.3.1 file is 64-bit, so I don't think it's a 
> basic mistake in my compilation settings:
> --------------------
> root@Xen1# ls -l xen.gz
> lrwxrwxrwx 1 root root 12 May 18 02:30 xen.gz -> xen-3.3.1.gz
> root@Xen1# zcat xen.gz | file -
> /dev/stdin: ELF 32-bit LSB executable, Intel 80386, version 1 (SYSV), 
> statically linked, stripped

I get the same result on my 64 bit Gentoo system but it is definitely
64 bit as I have 64 bit hvm's running:

zcat xen-3.4.0.gz  | file -
/dev/stdin: ELF 32-bit LSB executable, Intel 80386, version 1 (SYSV),
statically linked, stripped

> root@Xen1# file xen-syms-3.3.1
> xen-syms-3.3.1: ELF 64-bit LSB executable, x86-64, version 1 (SYSV), 
> statically linked, stripped

file xen-syms-3.4.0
xen-syms-3.4.0: ELF 64-bit LSB executable, x86-64, version 1 (SYSV),
statically linked, stripped

> --------------------
> I've been using http://www.gentoo.org/doc/en/xen-guide.xml and 
> http://en.gentoo-wiki.com/wiki/Xen as my primary references.  Searching this 
> list and Googling haven't yielded promising results so far, although my 
> situation sounds very similar (aside from the hardware) to 
> http://lists.xensource.com/archives/html/xen-users/2006-08/msg00018.html . 
>  I've started digging through the temporary working directories used by 
> Gentoo during installation, as well as the output from 'emerge' itself 
> (captured with 'script').  However, my eyes have begun to glaze over.
> Various pieces of system information follow - sorry if it's overly verbose. 
>  I've omitted my xen-sources kernel configuration settings for the moment, 
> since I believe the hypervisor compilation to be independent anyway.  Have I 
> simply managed to overlook something or to do something stupid?  Any pointers 
> would be appreciated.  If I've overlooked a more appropriate mailing list 
> (something Gentoo-specific, perhaps?), I apologize.
> Gentoo Portage environment:
> --------------------
> Portage (default/linux/amd64/2008.0, gcc-4.3.2, 
> glibc-2.8_p20080602-r1, 2.6.28-gentoo-r5-ericm x86_64)
> =================================================================
> System uname: 
> Linux-2.6.28-gentoo-r5-ericm-x86_64-Intel-R-_Xeon-TM-_CPU_3.00GHz-with-glibc2.2.5
> Timestamp of tree: Thu, 07 May 2009 01:45:01 +0000
> ccache version 2.4 [enabled]
> app-shells/bash:     3.2_p39
> dev-lang/python:     2.5.4-r2
> dev-util/ccache:     2.4-r7
> sys-apps/baselayout:
> sys-apps/sandbox:    1.6-r2
> sys-devel/autoconf:  2.63
> sys-devel/automake:  1.9.6-r2, 1.10.2
> sys-devel/binutils:  2.18-r3
> sys-devel/gcc-config: 1.4.0-r4
> sys-devel/libtool:   1.5.26
> virtual/os-headers:  2.6.27-r2
> CBUILD="x86_64-pc-linux-gnu"
> CFLAGS="-O2 -march=nocona -pipe"
> CHOST="x86_64-pc-linux-gnu"
> CONFIG_PROTECT_MASK="/etc/ca-certificates.conf /etc/env.d /etc/gconf 
> /etc/revdep-rebuild /etc/sandbox.d /etc/terminfo /etc/udev/rules.d"
> CXXFLAGS="-O2 -march=nocona -pipe"
> DISTDIR="/usr/portage/distfiles"
> EMERGE_DEFAULT_OPTS="--nospinner --ask" [ I removed "--verbose" for this 
> post.  --Eric ]
> FEATURES="buildpkg ccache collision-protect distlocks fixpackages noclean 
> parallel-fetch protect-owned sandbox sfperms strict test test-fail-continue 
> unmerge-orphans userfetch userpriv usersandbox"
> GENTOO_MIRRORS="ftp://mirror.datapipe.net/gentoo http://distfiles.gentoo.org 
> http://www.ibiblio.org/pub/Linux/distributions/gentoo";
> LDFLAGS="-Wl,-O1"
> MAKEOPTS="-j5"
> PKGDIR="/usr/portage/packages"
> PORTAGE_RSYNC_OPTS="--recursive --links --safe-links --perms --times 
> --compress --force --whole-file --delete --stats --timeout=180 
> --exclude=/distfiles --exclude=/local --exclude=/packages"
> PORTAGE_TMPDIR="/var/tmp"
> PORTDIR="/usr/portage"
> SYNC="rsync://rsync.namerica.gentoo.org/gentoo-portage"
> USE="acl amd64 berkdb bzip2 cli cracklib crypt cups dri examples fortran gdbm 
> gpm iconv ipv6 isdnlog midi mmx mudflap multilib ncurses nls nptl nptlonly 
> openmp pam pcre perl pppd python readline reflection session spl sse sse2 ssl 
> sysfs tcpd unicode xorg zlib" ALSA_CARDS="ali5451 als4000 atiixp atiixp-modem 
> bt87x ca0106 cmipci emu10k1x ens1370 ens1371 es1938 es1968 fm801 hda-intel 
> intel8x0 intel8x0m maestro3 trident usb-audio via82xx via82xx-modem ymfpci" 
> ALSA_PCM_PLUGINS="adpcm alaw asym copy dmix dshare dsnoop empty extplug file 
> hooks iec958 ioplug ladspa lfloat linear meter mmap_emul mulaw multi null 
> plug rate route share shm softvol" APACHE2_MODULES="actions alias auth_basic 
> authn_alias authn_anon authn_dbm authn_default authn_file authz_dbm 
> authz_default authz_groupfile authz_host authz_owner authz_user autoindex 
> cache dav dav_fs dav_lock deflate dir disk_cache env expires ext_filter 
> file_cache filter headers include info log_config logio mem_cache mime 
> mime_magic negotiation rewrite setenvif speling status unique_id userdir 
> usertrack vhost_alias" ELIBC="glibc" INPUT_DEVICES="keyboard mouse evdev" 
> KERNEL="linux" LCD_DEVICES="bayrad cfontz cfontz633 glk hd44780 lb216 lcdm001 
> mtxorb ncurses text" USERLAND="GNU" VIDEO_CARDS="fbdev glint i810 intel 
> mach64 mga neomagic nv r128 radeon savage sis tdfx trident vesa vga via 
> vmware voodoo"
> ----------
> /etc/portage/package.keywords:
> app-emulation/xen
> app-emulation/xen-tools
> sys-kernel/xen-sources
> ----------
> /etc/portage/package.use:
> net-analyzer/wireshark threads
> app-emulation/xen-tools hvm
> --------------------
> Installed Xen, Xen-related packages:
> --------------------
> /var/db/pkg/app-emulation/xen-3.3.1-r1
> /var/db/pkg/app-emulation/xen-tools-3.3.1
> /var/db/pkg/sys-devel/dev86-0.16.17-r5
> /var/db/pkg/sys-kernel/xen-sources-2.6.18-r12
> --------------------
> Regards,
> --Eric
> _______________________________________________
> Xen-users mailing list
> Xen-users@xxxxxxxxxxxxxxxxxxx
> http://lists.xensource.com/xen-users

What does "xm info" return? it should list machine type:

machine                : x86_64

Also xen_caps:

xen_caps               : xen-3.0-x86_64 xen-3.0-x86_32p hvm-3.0-x86_32
hvm-3.0-x86_32p hvm-3.0-x86_64


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