[01/28] nVMX: Add "nested" module option to vmx.c

Commit Message

Nadav Har'El Dec. 8, 2010, 5 p.m. UTC

None

Patch

--- .before/arch/x86/kvm/vmx.c	2010-12-08 18:56:48.000000000 +0200
+++ .after/arch/x86/kvm/vmx.c	2010-12-08 18:56:48.000000000 +0200
@@ -69,6 +69,14 @@  module_param(emulate_invalid_guest_state
 static int __read_mostly vmm_exclusive = 1;
 module_param(vmm_exclusive, bool, S_IRUGO);
 
+/*
+ * If nested=1, nested virtualization is supported, i.e., the guest may use
+ * VMX and be a hypervisor for its own guests. If nested=0, the guest may not
+ * use VMX instructions.
+ */
+static int nested = 0;
+module_param(nested, int, S_IRUGO);
+
 #define KVM_GUEST_CR0_MASK_UNRESTRICTED_GUEST				\
 	(X86_CR0_WP | X86_CR0_NE | X86_CR0_NW | X86_CR0_CD)
 #define KVM_GUEST_CR0_MASK						\