[virt-tools-list] [PATCH 1/2 virt-what] Add IA64-specific tests for virtualization (RHBZ#707508).
Richard W.M. Jones
rjones at redhat.com
Thu May 26 15:06:40 UTC 2011
--
Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
libguestfs lets you edit virtual machines. Supports shell scripting,
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>From 3ea952163f0c28cd88f8473bb015df892c4247bf Mon Sep 17 00:00:00 2001
From: Richard W.M. Jones <rjones at redhat.com>
Date: Thu, 26 May 2011 15:40:59 +0100
Subject: [PATCH 1/2] Add IA64-specific tests for virtualization
(RHBZ#707508).
Xen IA64 HVM does not provide a simple way to detect the
hypervisor.
If we are lucky and PV-on-HVM drivers are installed and loaded,
then there will be a /sys/bus/xen directory.
Otherwise we add a timing attack to see if we can detect generic
virtualization. Since this is a big hack, it is only enabled on IA64
and only used when all other methods of detection have failed.
This commit also adds `uname -p` to all tests (enabling arch detection
so we only run the above tests on IA64).
---
.gitignore | 2 +
Makefile.am | 16 +++++++++
configure.ac | 4 ++
tests/baremetal/sbin/uname | 2 +
tests/esx4.1/sbin/uname | 2 +
tests/hyperv/sbin/uname | 2 +
tests/kvm-explicit-cpu/sbin/uname | 2 +
tests/kvm/sbin/uname | 2 +
tests/linux-vserver/sbin/uname | 2 +
tests/lx86/sbin/uname | 2 +
tests/parallels-desktop/sbin/uname | 2 +
tests/qemu/sbin/uname | 2 +
tests/rhel5-xen-dom0/sbin/uname | 2 +
tests/rhel5-xen-domU-hvm/sbin/uname | 2 +
tests/rhel5-xen-domU-pv/sbin/uname | 2 +
tests/zvm/sbin/uname | 2 +
virt-what-ia64-xen-rdtsc-test.c | 58 +++++++++++++++++++++++++++++++++++
virt-what.in | 21 ++++++++++++
virt-what.pod | 9 +++++
19 files changed, 136 insertions(+), 0 deletions(-)
create mode 100755 tests/baremetal/sbin/uname
create mode 100755 tests/esx4.1/sbin/uname
create mode 100755 tests/hyperv/sbin/uname
create mode 100755 tests/kvm-explicit-cpu/sbin/uname
create mode 100755 tests/kvm/sbin/uname
create mode 100755 tests/linux-vserver/sbin/uname
create mode 100755 tests/lx86/sbin/uname
create mode 100755 tests/parallels-desktop/sbin/uname
create mode 100755 tests/qemu/sbin/uname
create mode 100755 tests/rhel5-xen-dom0/sbin/uname
create mode 100755 tests/rhel5-xen-domU-hvm/sbin/uname
create mode 100755 tests/rhel5-xen-domU-pv/sbin/uname
create mode 100755 tests/zvm/sbin/uname
create mode 100644 virt-what-ia64-xen-rdtsc-test.c
diff --git a/.gitignore b/.gitignore
index 4f171bb..3be575f 100644
--- a/.gitignore
+++ b/.gitignore
@@ -7,10 +7,12 @@
/aclocal.m4
/autom4te.cache
/compile
+/config.guess
/config.h
/config.h.in
/config.log
/config.status
+/config.sub
/configure
/depcomp
/install-sh
diff --git a/Makefile.am b/Makefile.am
index 2dfed9c..aa97852 100644
--- a/Makefile.am
+++ b/Makefile.am
@@ -21,6 +21,9 @@ AM_CPPFLAGS = -Wall
sbin_SCRIPTS = virt-what
libexec_PROGRAMS = virt-what-cpuid-helper
+if HOST_CPU_IA64
+libexec_PROGRAMS += virt-what-ia64-xen-rdtsc-test
+endif
man_MANS = virt-what.1
@@ -53,46 +56,55 @@ EXTRA_DIST = \
tests/baremetal/proc/self/status \
tests/baremetal/sbin/dmidecode \
tests/baremetal/sbin/id \
+ tests/baremetal/sbin/uname \
tests/baremetal/sbin/virt-what-cpuid-helper \
tests/esx4.1/proc/cpuinfo \
tests/esx4.1/proc/self/status \
tests/esx4.1/sbin/dmidecode \
tests/esx4.1/sbin/id \
+ tests/esx4.1/sbin/uname \
tests/esx4.1/sbin/virt-what-cpuid-helper \
tests/hyperv/proc/cpuinfo \
tests/hyperv/proc/self/status \
tests/hyperv/sbin/dmidecode \
tests/hyperv/sbin/id \
+ tests/hyperv/sbin/uname \
tests/hyperv/sbin/virt-what-cpuid-helper \
tests/kvm/proc/cpuinfo \
tests/kvm/proc/self/status \
tests/kvm/sbin/dmidecode \
tests/kvm/sbin/id \
+ tests/kvm/sbin/uname \
tests/kvm/sbin/virt-what-cpuid-helper \
tests/kvm-explicit-cpu/proc/cpuinfo \
tests/kvm-explicit-cpu/proc/self/status \
tests/kvm-explicit-cpu/sbin/dmidecode \
tests/kvm-explicit-cpu/sbin/id \
+ tests/kvm-explicit-cpu/sbin/uname \
tests/kvm-explicit-cpu/sbin/virt-what-cpuid-helper \
tests/linux-vserver/proc/cpuinfo \
tests/linux-vserver/proc/self/status \
tests/linux-vserver/sbin/dmidecode \
tests/linux-vserver/sbin/id \
+ tests/linux-vserver/sbin/uname \
tests/linux-vserver/sbin/virt-what-cpuid-helper \
tests/lx86/proc/cpuinfo \
tests/lx86/proc/self/status \
tests/lx86/sbin/dmidecode \
tests/lx86/sbin/id \
+ tests/lx86/sbin/uname \
tests/lx86/sbin/virt-what-cpuid-helper \
tests/parallels-desktop/proc/cpuinfo \
tests/parallels-desktop/proc/self/status \
tests/parallels-desktop/sbin/dmidecode \
tests/parallels-desktop/sbin/id \
+ tests/parallels-desktop/sbin/uname \
tests/parallels-desktop/sbin/virt-what-cpuid-helper \
tests/qemu/proc/cpuinfo \
tests/qemu/proc/self/status \
tests/qemu/sbin/dmidecode \
tests/qemu/sbin/id \
+ tests/qemu/sbin/uname \
tests/qemu/sbin/virt-what-cpuid-helper \
tests/rhel5-xen-dom0/proc/cpuinfo \
tests/rhel5-xen-dom0/proc/self/status \
@@ -104,6 +116,7 @@ EXTRA_DIST = \
tests/rhel5-xen-dom0/proc/xen/xsd_port \
tests/rhel5-xen-dom0/sbin/dmidecode \
tests/rhel5-xen-dom0/sbin/id \
+ tests/rhel5-xen-dom0/sbin/uname \
tests/rhel5-xen-dom0/sbin/virt-what-cpuid-helper \
tests/rhel5-xen-dom0/sys/hypervisor/properties/pagesize \
tests/rhel5-xen-dom0/sys/hypervisor/properties/changeset \
@@ -123,6 +136,7 @@ EXTRA_DIST = \
tests/rhel5-xen-domU-hvm/proc/self/status \
tests/rhel5-xen-domU-hvm/sbin/dmidecode \
tests/rhel5-xen-domU-hvm/sbin/id \
+ tests/rhel5-xen-domU-hvm/sbin/uname \
tests/rhel5-xen-domU-hvm/sbin/virt-what-cpuid-helper \
tests/rhel5-xen-domU-pv/proc/cpuinfo \
tests/rhel5-xen-domU-pv/proc/self/status \
@@ -132,6 +146,7 @@ EXTRA_DIST = \
tests/rhel5-xen-domU-pv/proc/xen/xenbus \
tests/rhel5-xen-domU-pv/sbin/dmidecode \
tests/rhel5-xen-domU-pv/sbin/id \
+ tests/rhel5-xen-domU-pv/sbin/uname \
tests/rhel5-xen-domU-pv/sbin/virt-what-cpuid-helper \
tests/rhel5-xen-domU-pv/sys/hypervisor/properties/pagesize \
tests/rhel5-xen-domU-pv/sys/hypervisor/properties/changeset \
@@ -152,5 +167,6 @@ EXTRA_DIST = \
tests/zvm/proc/sysinfo \
tests/zvm/sbin/dmidecode \
tests/zvm/sbin/id \
+ tests/zvm/sbin/uname \
tests/zvm/sbin/virt-what-cpuid-helper \
$(TESTS)
diff --git a/configure.ac b/configure.ac
index 0aa7deb..8e75938 100644
--- a/configure.ac
+++ b/configure.ac
@@ -28,6 +28,10 @@ test "x$U" != "x" && AC_MSG_ERROR([Compiler not ANSI compliant])
AM_PROG_CC_C_O
+dnl Architecture we are compiling for.
+AC_CANONICAL_HOST
+AM_CONDITIONAL([HOST_CPU_IA64], [ test "x$host_cpu" = "xia64" ])
+
dnl Produce output files.
AC_CONFIG_HEADERS([config.h])
AC_CONFIG_FILES([virt-what],[chmod +x virt-what])
diff --git a/tests/baremetal/sbin/uname b/tests/baremetal/sbin/uname
new file mode 100755
index 0000000..ab0ec89
--- /dev/null
+++ b/tests/baremetal/sbin/uname
@@ -0,0 +1,2 @@
+#!/bin/sh -
+echo x86_64
diff --git a/tests/esx4.1/sbin/uname b/tests/esx4.1/sbin/uname
new file mode 100755
index 0000000..ab0ec89
--- /dev/null
+++ b/tests/esx4.1/sbin/uname
@@ -0,0 +1,2 @@
+#!/bin/sh -
+echo x86_64
diff --git a/tests/hyperv/sbin/uname b/tests/hyperv/sbin/uname
new file mode 100755
index 0000000..ab0ec89
--- /dev/null
+++ b/tests/hyperv/sbin/uname
@@ -0,0 +1,2 @@
+#!/bin/sh -
+echo x86_64
diff --git a/tests/kvm-explicit-cpu/sbin/uname b/tests/kvm-explicit-cpu/sbin/uname
new file mode 100755
index 0000000..ab0ec89
--- /dev/null
+++ b/tests/kvm-explicit-cpu/sbin/uname
@@ -0,0 +1,2 @@
+#!/bin/sh -
+echo x86_64
diff --git a/tests/kvm/sbin/uname b/tests/kvm/sbin/uname
new file mode 100755
index 0000000..ab0ec89
--- /dev/null
+++ b/tests/kvm/sbin/uname
@@ -0,0 +1,2 @@
+#!/bin/sh -
+echo x86_64
diff --git a/tests/linux-vserver/sbin/uname b/tests/linux-vserver/sbin/uname
new file mode 100755
index 0000000..ab0ec89
--- /dev/null
+++ b/tests/linux-vserver/sbin/uname
@@ -0,0 +1,2 @@
+#!/bin/sh -
+echo x86_64
diff --git a/tests/lx86/sbin/uname b/tests/lx86/sbin/uname
new file mode 100755
index 0000000..ef865f9
--- /dev/null
+++ b/tests/lx86/sbin/uname
@@ -0,0 +1,2 @@
+#!/bin/sh -
+echo i686
diff --git a/tests/parallels-desktop/sbin/uname b/tests/parallels-desktop/sbin/uname
new file mode 100755
index 0000000..ab0ec89
--- /dev/null
+++ b/tests/parallels-desktop/sbin/uname
@@ -0,0 +1,2 @@
+#!/bin/sh -
+echo x86_64
diff --git a/tests/qemu/sbin/uname b/tests/qemu/sbin/uname
new file mode 100755
index 0000000..ab0ec89
--- /dev/null
+++ b/tests/qemu/sbin/uname
@@ -0,0 +1,2 @@
+#!/bin/sh -
+echo x86_64
diff --git a/tests/rhel5-xen-dom0/sbin/uname b/tests/rhel5-xen-dom0/sbin/uname
new file mode 100755
index 0000000..ab0ec89
--- /dev/null
+++ b/tests/rhel5-xen-dom0/sbin/uname
@@ -0,0 +1,2 @@
+#!/bin/sh -
+echo x86_64
diff --git a/tests/rhel5-xen-domU-hvm/sbin/uname b/tests/rhel5-xen-domU-hvm/sbin/uname
new file mode 100755
index 0000000..ab0ec89
--- /dev/null
+++ b/tests/rhel5-xen-domU-hvm/sbin/uname
@@ -0,0 +1,2 @@
+#!/bin/sh -
+echo x86_64
diff --git a/tests/rhel5-xen-domU-pv/sbin/uname b/tests/rhel5-xen-domU-pv/sbin/uname
new file mode 100755
index 0000000..ab0ec89
--- /dev/null
+++ b/tests/rhel5-xen-domU-pv/sbin/uname
@@ -0,0 +1,2 @@
+#!/bin/sh -
+echo x86_64
diff --git a/tests/zvm/sbin/uname b/tests/zvm/sbin/uname
new file mode 100755
index 0000000..f416bcf
--- /dev/null
+++ b/tests/zvm/sbin/uname
@@ -0,0 +1,2 @@
+#!/bin/sh -
+echo s390
diff --git a/virt-what-ia64-xen-rdtsc-test.c b/virt-what-ia64-xen-rdtsc-test.c
new file mode 100644
index 0000000..75c8ae3
--- /dev/null
+++ b/virt-what-ia64-xen-rdtsc-test.c
@@ -0,0 +1,58 @@
+/* virt-what-ia64-xen-rdtsc-test
+ * Copyright (C) 2011 Red Hat Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#ifndef __ia64__
+#error "error in Makefile - this program should only be compiled for ia64 host"
+#endif
+
+/* This program is ugly, but possibly the only way to detect
+ * virtualized Xen HVM guests on IA64.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+static inline unsigned long
+rdtsc (void)
+{
+ unsigned long res;
+ asm volatile ("mov %0=ar.itc" : "=r"(res));
+ return res;
+}
+
+int
+main ()
+{
+ unsigned long old, new;
+ int virt;
+ int i;
+
+ virt = 1;
+
+ for (i = 16; i--; ) {
+ old = rdtsc (); new = rdtsc ();
+ /*printf("%ld\n", new - old);*/
+ if (new - old < 30) {
+ virt = 0;
+ break;
+ }
+ }
+
+ exit (virt);
+}
diff --git a/virt-what.in b/virt-what.in
index a27be10..74ffab2 100644
--- a/virt-what.in
+++ b/virt-what.in
@@ -87,6 +87,11 @@ cpuid=`virt-what-cpuid-helper`
dmi=`LANG=C dmidecode 2>&1`
+# Architecture.
+# Note for the purpose of testing, we only call uname with -p option.
+
+arch=`uname -p`
+
# Check for VMware.
# cpuid check added by Chetan Loke.
@@ -188,6 +193,22 @@ elif [ -f $root/sys/hypervisor/type ] &&
# enough information at present to tell whether this is dom0
# or domU. XXX
echo xen
+elif [ "$arch" = "ia64" ]; then
+ if [ -d $root/sys/bus/xen -a ! -d $root/sys/bus/xen-backend ]; then
+ # PV-on-HVM drivers installed in a Xen guest.
+ echo xen
+ echo xen-domU
+ else
+ # There is no virt leaf on IA64 HVM. This is a last-ditch
+ # attempt to detect something is virtualized by using a
+ # timing attack.
+ virt-what-ia64-xen-rdtsc-test > /dev/null 2>&1
+ case "$?" in
+ 0) ;; # not virtual
+ 1) # Could be some sort of virt, or could just be a bit slow.
+ echo virt
+ esac
+ fi
fi
# Check for QEMU/KVM.
diff --git a/virt-what.pod b/virt-what.pod
index 4304297..7769ee9 100644
--- a/virt-what.pod
+++ b/virt-what.pod
@@ -113,6 +113,15 @@ This is a User-Mode Linux (UML) guest.
Status: contributed by Laurent L?onard
+=item B<virt>
+
+Some sort of virtualization appears to be present, but we are not sure
+what it is. In some very rare corner cases where we know that
+virtualization is hard to detect, we will try a timing attack to see
+if certain machine instructions are running much more slowly than they
+should be, which would indicate virtualization. In this case, the
+generic fact C<virt> is printed.
+
=item B<virtage>
This is Hitachi Virtualization Manager (HVM) Virtage
--
1.7.5.1
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