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-rw-r--r--arch/x86/lguest/boot.c10
1 files changed, 10 insertions, 0 deletions
diff --git a/arch/x86/lguest/boot.c b/arch/x86/lguest/boot.c
index 13ee258..f63da5e 100644
--- a/arch/x86/lguest/boot.c
+++ b/arch/x86/lguest/boot.c
@@ -70,6 +70,7 @@
#include <asm/i387.h>
#include <asm/stackprotector.h>
#include <asm/reboot.h> /* for struct machine_ops */
+#include <asm/kvm_para.h>
/*G:010
* Welcome to the Guest!
@@ -455,6 +456,15 @@ static void lguest_cpuid(unsigned int *ax, unsigned int *bx,
*ax &= 0xFFFFF0FF;
*ax |= 0x00000500;
break;
+
+ /*
+ * This is used to detect if we're running under KVM. We might be,
+ * but that's a Host matter, not us. So say we're not.
+ */
+ case KVM_CPUID_SIGNATURE:
+ *bx = *cx = *dx = 0;
+ break;
+
/*
* 0x80000000 returns the highest Extended Function, so we futureproof
* like we do above by limiting it to known fields.

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