src/config/cloud/settings.h - ipxe - Git at Google

 /* It can often be useful to know the CPU on which a cloud instance is
  * running (e.g. to isolate problems with Azure AMD instances).
  */
 #if defined ( __i386__ ) || defined ( __x86_64__ )
 #define CPUID_SETTINGS
 #endif
	/* It can often be useful to know the CPU on which a cloud instance is
	* running (e.g. to isolate problems with Azure AMD instances).
	*/
	#if defined ( __i386__ ) \|\| defined ( __x86_64__ )
	#define CPUID_SETTINGS
	#endif