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-rw-r--r--src/util.c76
1 files changed, 76 insertions, 0 deletions
diff --git a/src/util.c b/src/util.c
index 7692a2d620..09c13143c6 100644
--- a/src/util.c
+++ b/src/util.c
@@ -3564,6 +3564,82 @@ const char *default_term_for_tty(const char *tty) {
return "TERM=vt100";
}
+bool running_in_vm(void) {
+
+#if defined(__i386__) || defined(__x86_64__)
+
+ /* Both CPUID and DMI are x86 specific interfaces... */
+
+ const char *const dmi_vendors[] = {
+ "/sys/class/dmi/id/sys_vendor",
+ "/sys/class/dmi/id/board_vendor",
+ "/sys/class/dmi/id/bios_vendor"
+ };
+
+ uint32_t eax = 0x40000000;
+ union {
+ uint32_t sig32[3];
+ char text[13];
+ } sig;
+
+ unsigned i;
+
+ for (i = 0; i < ELEMENTSOF(dmi_vendors); i++) {
+ char *s;
+ bool b;
+
+ if (read_one_line_file(dmi_vendors[i], &s) < 0)
+ continue;
+
+ b = startswith(s, "QEMU") ||
+ /* http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1009458 */
+ startswith(s, "VMware") ||
+ startswith(s, "VMW") ||
+ startswith(s, "Microsoft Corporation") ||
+ startswith(s, "innotek GmbH") ||
+ startswith(s, "Xen");
+
+ free(s);
+
+ if (b)
+ return true;
+ }
+
+ /* http://lwn.net/Articles/301888/ */
+ zero(sig);
+
+
+#if defined (__i386__)
+#define REG_a "eax"
+#define REG_b "ebx"
+#elif defined (__amd64__)
+#define REG_a "rax"
+#define REG_b "rbx"
+#endif
+
+ __asm__ __volatile__ (
+ /* ebx/rbx is being used for PIC! */
+ " push %%"REG_b" \n\t"
+ " cpuid \n\t"
+ " mov %%ebx, %1 \n\t"
+ " pop %%"REG_b" \n\t"
+
+ : "=a" (eax), "=r" (sig.sig32[0]), "=c" (sig.sig32[1]), "=d" (sig.sig32[2])
+ : "0" (eax)
+ );
+
+ if (streq(sig.text, "XenVMMXenVMM") ||
+ streq(sig.text, "KVMKVMKVM") ||
+ /* http://kb.vmware.com/selfservice/microsites/search.do?language=en_US&cmd=displayKC&externalId=1009458 */
+ streq(sig.text, "VMwareVMware") ||
+ /* http://msdn.microsoft.com/en-us/library/bb969719.aspx */
+ streq(sig.text, "Microsoft Hv"))
+ return true;
+#endif
+
+ return false;
+}
+
static const char *const ioprio_class_table[] = {
[IOPRIO_CLASS_NONE] = "none",
[IOPRIO_CLASS_RT] = "realtime",