Architecture specific initialization prior to processor structures initialization

sdk/xtdk/amd64/arfuncs.h

@@ -95,6 +95,10 @@ VOID
 ArWriteControlRegister(IN USHORT ControlRegister,
                        IN UINT_PTR Value);
 
+XTCDECL
+VOID
+ArWriteEflagsRegister(IN UINT_PTR Value);
+
 XTCDECL
 VOID
 ArWriteModelSpecificRegister(IN ULONG Register,

sdk/xtdk/amd64/artypes.h

@@ -75,6 +75,13 @@
 #define X86_MSR_GSBASE                                  0xC0000101
 #define X86_MSR_KERNEL_GSBASE                           0xC0000102
 
+/* Processor features in the EFER MSR */
+#define X86_MSR_EFER_SCE                                (1 <<  0)
+#define X86_MSR_EFER_LME                                (1 <<  8)
+#define X86_MSR_EFER_LMA                                (1 << 10)
+#define X86_MSR_EFER_NXE                                (1 << 11)
+#define X86_MSR_EFER_SVME                               (1 << 12)
+
 /* CPUID features enumeration list */
 typedef enum _CPUID_FEATURES
 {