Kernel: CPUID can detect wether cpu supports nxe bit

kernel/include/kernel/CPUID.h

@@ -77,5 +77,6 @@ namespace CPUID
 	const char* get_vendor();
 	void get_features(uint32_t& ecx, uint32_t& edx);
 	bool is_64_bit();
+	bool has_nxe();
 
 }

kernel/kernel/CPUID.cpp

@@ -39,6 +39,17 @@ namespace CPUID
 		return buffer[3] & (1 << 29);
 	}
 
+	bool has_nxe()
+	{
+		uint32_t buffer[4] {};
+		get_cpuid(0x80000000, buffer);
+		if (buffer[0] < 0x80000001)
+			return false;
+
+		get_cpuid(0x80000001, buffer);
+		return buffer[3] & (1 << 20);
+	}
+
 	const char* feature_string_ecx(uint32_t feat)
 	{
 		switch (feat)