[src/trunk]: src/usr.sbin/cpuctl/arch Add code to detect hypervisor. The code...

[msaitoh <msaitoh%NetBSD.org@localhost>]

details:   https://anonhg.NetBSD.org/src/rev/37a960a33420
branches:  trunk
changeset: 333520:37a960a33420
user:      msaitoh <msaitoh%NetBSD.org@localhost>
date:      Fri Nov 07 05:37:05 2014 +0000

description:
Add code to detect hypervisor. The code was based from FreeBSD and ported
by Kengo Nakahara.

diffstat:

 usr.sbin/cpuctl/arch/i386.c |  51 +++++++++++++++++++++++++++++++++++++++++++-
 1 files changed, 49 insertions(+), 2 deletions(-)

diffs (86 lines):

diff -r 89949f35e0d6 -r 37a960a33420 usr.sbin/cpuctl/arch/i386.c
--- a/usr.sbin/cpuctl/arch/i386.c       Fri Nov 07 02:57:19 2014 +0000
+++ b/usr.sbin/cpuctl/arch/i386.c       Fri Nov 07 05:37:05 2014 +0000
@@ -1,4 +1,4 @@
-/*     $NetBSD: i386.c,v 1.59 2014/09/09 15:14:39 msaitoh Exp $        */
+/*     $NetBSD: i386.c,v 1.60 2014/11/07 05:37:05 msaitoh Exp $        */
 
 /*-
  * Copyright (c) 1999, 2000, 2001, 2006, 2007, 2008 The NetBSD Foundation, Inc.
@@ -57,7 +57,7 @@
 
 #include <sys/cdefs.h>
 #ifndef lint
-__RCSID("$NetBSD: i386.c,v 1.59 2014/09/09 15:14:39 msaitoh Exp $");
+__RCSID("$NetBSD: i386.c,v 1.60 2014/11/07 05:37:05 msaitoh Exp $");
 #endif /* not lint */
 
 #include <sys/types.h>
@@ -220,6 +220,7 @@
 static void    transmeta_cpu_info(struct cpu_info *);
 /* Common functions */
 static void    cpu_probe_base_features(struct cpu_info *, const char *);
+static void    cpu_probe_hv_features(struct cpu_info *, const char *);
 static void    cpu_probe_features(struct cpu_info *);
 static void    print_bits(const char *, const char *, const char *, uint32_t);
 static void    identifycpu_cpuids(struct cpu_info *);
@@ -1546,6 +1547,51 @@
 }
 
 static void
+cpu_probe_hv_features(struct cpu_info *ci, const char *cpuname)
+{
+       uint32_t descs[4];
+       char hv_sig[13];
+       char *p;
+       const char *hv_name;
+       int i;
+
+       /*
+        * [RFC] CPUID usage for interaction between Hypervisors and Linux.
+        * http://lkml.org/lkml/2008/10/1/246
+        *
+        * KB1009458: Mechanisms to determine if software is running in
+        * a VMware virtual machine
+        * http://kb.vmware.com/kb/1009458
+        */
+       if ((ci->ci_feat_val[1] & CPUID2_RAZ) != 0) {
+               x86_cpuid(0x40000000, descs);
+               for (i = 1, p = hv_sig; i < 4; i++, p += sizeof(descs) / 4)
+                       memcpy(p, &descs[i], sizeof(descs[i]));
+               *p = '\0';
+               /*
+                * HV vendor    ID string
+                * ------------+--------------
+                * KVM          "KVMKVMKVM"
+                * Microsoft    "Microsoft Hv"
+                * VMware       "VMwareVMware"
+                * Xen          "XenVMMXenVMM"
+                */
+               if (strncmp(hv_sig, "KVMKVMKVM", 9) == 0)
+                       hv_name = "KVM";
+               else if (strncmp(hv_sig, "Microsoft Hv", 12) == 0)
+                       hv_name = "Hypver-V";
+               else if (strncmp(hv_sig, "VMwareVMware", 12) == 0)
+                       hv_name = "VMware";
+               else if (strncmp(hv_sig, "XenVMMXenVMM", 12) == 0)
+                       hv_name = "Xen";
+               else
+                       hv_name = "unknown";
+
+               printf("%s: Running on hypervisor: %s\n", cpuname, hv_name);
+       }
+}
+
+static void
 cpu_probe_features(struct cpu_info *ci)
 {
        const struct cpu_cpuid_nameclass *cpup = NULL;
@@ -1669,6 +1715,7 @@
 
        ci = &cistore;
        cpu_probe_base_features(ci, cpuname);
+       cpu_probe_hv_features(ci, cpuname);
        cpu_probe_features(ci);
 
        if (ci->ci_cpu_type >= 0) {