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[virt-tools-list] [PATCH 1/2 virt-what] Add IA64-specific tests for virtualization (RHBZ#707508).



-- 
Richard Jones, Virtualization Group, Red Hat http://people.redhat.com/~rjones
libguestfs lets you edit virtual machines.  Supports shell scripting,
bindings from many languages.  http://libguestfs.org
>From 3ea952163f0c28cd88f8473bb015df892c4247bf Mon Sep 17 00:00:00 2001
From: Richard W.M. Jones <rjones 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 LĂ©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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