Index: head/security/ridl/Makefile
===================================================================
--- head/security/ridl/Makefile	(revision 504151)
+++ head/security/ridl/Makefile	(revision 504152)
@@ -1,30 +1,33 @@
 # $FreeBSD$
 
 PORTNAME=	ridl
 DISTVERSIONPREFIX=	v
 DISTVERSION=	g20190520
 CATEGORIES=	security
 
 MAINTAINER=	yuri@FreeBSD.org
 COMMENT=	Tool to check whether the system is affected by various attacks
 
 LICENSE=	MPL20
 LICENSE_FILE=	${WRKSRC}/LICENSE
 
+ONLY_FOR_ARCHS=		amd64 i386
+ONLY_FOR_ARCHS_REASON=	specific to Intel CPUs per https://mdsattacks.com/
+
 LIB_DEPENDS=	libsysinfo.so:devel/libsysinfo
 
 USES=		cmake localbase:ldflags
 USE_GITHUB=	yes
 GH_ACCOUNT=	vusec
 GH_TAGNAME=	7e4fc98
 GH_TUPLE=	nothings:stb:1034f5e:stb/stb \
 		vurtun:nuklear:509c75b:nuklear/nuklear
 
 LDFLAGS+=	${LOCALBASE}/lib/libsysinfo.so
 
 PLIST_FILES=	bin/mdstool-cli
 
 do-install:
 	${INSTALL_PROGRAM} ${BUILD_WRKSRC}/mdstool-cli ${STAGEDIR}${PREFIX}/bin
 
 .include <bsd.port.mk>