arch/x86/include/uapi/asm/hwcap2.h - linux - Git at Google

 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
 #ifndef _ASM_X86_HWCAP2_H
 #define _ASM_X86_HWCAP2_H

 /* MONITOR/MWAIT enabled in Ring 3 */
 #define HWCAP2_RING3MWAIT		(1 << 0)

 #endif
	/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
	#ifndef _ASM_X86_HWCAP2_H
	#define _ASM_X86_HWCAP2_H

	/* MONITOR/MWAIT enabled in Ring 3 */
	#define HWCAP2_RING3MWAIT (1 << 0)

	#endif