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diff --git a/palacios/include/geekos/svm_ctrl_regs.h b/palacios/include/geekos/svm_ctrl_regs.h
new file mode 100644
index 0000000..f710159
--- /dev/null
+++ b/palacios/include/geekos/svm_ctrl_regs.h
@@ -0,0 +1,25 @@
+#ifndef __SVM_CTRL_REGS_H
+#define __SVM_CTRL_REGS_H
+
+#include <geekos/vm_guest.h>
+#include <geekos/vmm_util.h>
+
+
+// First opcode byte
+static const uchar_t cr_access_byte = 0x0f;
+
+// Second opcode byte
+static const uchar_t lmsw_byte = 0x01;
+static const uchar_t smsw_byte = 0x01;
+static const uchar_t clts_byte = 0x06;
+static const uchar_t mov_to_cr_byte = 0x22;
+static const uchar_t mov_from_cr_byte = 0x20;
+
+
+
+int handle_cr0_write(guest_info_t * info, ullong_t * new_cr0);
+
+
+
+
+#endif