diff --git a/app-emulation/xen/Manifest b/app-emulation/xen/Manifest
new file mode 100644
index 0000000..40c90aa
--- /dev/null
+++ b/app-emulation/xen/Manifest
@@ -0,0 +1,4 @@
+DIST xen-4.12.1-upstream-patches-0.tar.xz 2968 BLAKE2B 94053d4dea21d7f820ff02aa697dad54613dfc90e8f50b991b947688fdadb5cdc22262546bd73ef9a426cd5a04e88e8fa7755041ddc449b453b9a887fffae2d5 SHA512 1bef1341366ca55137bad006505b5277a28e7c68348148ade7c3dc72a19cf936c311d4b6dde2a629f86de30d1101fb4659b6b53ca7c9aefb2d86148ab2fec853
+DIST xen-4.12.1.tar.gz 26970584 BLAKE2B ceab2af3d36b72d838d7b4f58f6855c97cf05282a4ea3c82eda29b8945ee20563845b7be02884bf0a061a633fb2b3016a2f7396ce34d9b3d93f90d6ee6d449ed SHA512 be15d3af6b109771aaf59b3621e4e1560b7d9a963d9b7f6a1f6f4a1c907fd97434b060c15f75849b44fbda33f26eb51b030d14d068c6ad5103ad240fe7a98f40
+EBUILD xen-4.12.1.ebuild 4796 BLAKE2B f653a6ad08d02979ae08574e30ec1e5f32022f9837c3f0fad1ebda5a9a421bfe55025b9446181d3f3ec70749000d21591924ca7afb97a1253494d6517e638ade SHA512 76671cb83ea9303bae0a8b6c1acdca345a1727fc57465261620ab2fd06472ed48f60a993cabe405e3a3a462cdb5dc37a0e0dce36591164084c3cf4832686b2b3
+MISC metadata.xml 417 BLAKE2B 5713c8e5f27d56714938b7d2bed096c3b3f9fbb0ad9bce2bb3240e4a8556134cfc88efe0e2c7feb2e9cc722c11800e8433afa0d03746b05998909dd976230225 SHA512 2708f84b8a1508eebc96539993ae1bde4b921d4401229c221e2bee9a0cd643fdf1f854fcbba6033ed68667d0efb00c25222f4c68535a96f2200084d8d8759946
diff --git a/app-emulation/xen/metadata.xml b/app-emulation/xen/metadata.xml
new file mode 100644
index 0000000..f69cd9e
--- /dev/null
+++ b/app-emulation/xen/metadata.xml
@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!DOCTYPE pkgmetadata SYSTEM "http://www.gentoo.org/dtd/metadata.dtd">
+<pkgmetadata>
+	<maintainer type="project">
+		<email>xen@gentoo.org</email>
+		<name>Gentoo Xen Project</name>
+	</maintainer>
+	<use>
+		<flag name="flask">Enable the Flask XSM module from NSA</flag>
+		<flag name="efi">Adds efi boot support, requires LDFLAG -melf_x86_64 for amd64</flag>
+	</use>
+</pkgmetadata>
diff --git a/app-emulation/xen/xen-4.12.1.ebuild b/app-emulation/xen/xen-4.12.1.ebuild
new file mode 100644
index 0000000..18215b6
--- /dev/null
+++ b/app-emulation/xen/xen-4.12.1.ebuild
@@ -0,0 +1,171 @@
+# Copyright 1999-2019 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI=7
+
+PYTHON_COMPAT=( python2_7 )
+
+inherit flag-o-matic mount-boot multilib python-any-r1 toolchain-funcs
+
+MY_PV=${PV/_/-}
+MY_P=${PN}-${MY_PV}
+
+if [[ $PV == *9999 ]]; then
+	inherit git-r3
+	EGIT_REPO_URI="git://xenbits.xen.org/xen.git"
+	SRC_URI=""
+else
+	KEYWORDS="~amd64 ~arm -x86"
+	UPSTREAM_VER=0
+	SECURITY_VER=
+	GENTOO_VER=
+
+	[[ -n ${UPSTREAM_VER} ]] && \
+		UPSTREAM_PATCHSET_URI="https://dev.gentoo.org/~dlan/distfiles/${P}-upstream-patches-${UPSTREAM_VER}.tar.xz
+		https://github.com/hydrapolic/gentoo-dist/raw/master/xen/${P}-upstream-patches-${UPSTREAM_VER}.tar.xz"
+	[[ -n ${SECURITY_VER} ]] && \
+		SECURITY_PATCHSET_URI="https://dev.gentoo.org/~dlan/distfiles/${PN}-security-patches-${SECURITY_VER}.tar.xz"
+	[[ -n ${GENTOO_VER} ]] && \
+		GENTOO_PATCHSET_URI="https://dev.gentoo.org/~dlan/distfiles/${PN}-gentoo-patches-${GENTOO_VER}.tar.xz"
+	SRC_URI="https://downloads.xenproject.org/release/xen/${MY_PV}/${MY_P}.tar.gz
+		${UPSTREAM_PATCHSET_URI}
+		${SECURITY_PATCHSET_URI}
+		${GENTOO_PATCHSET_URI}"
+fi
+
+DESCRIPTION="The Xen virtual machine monitor"
+HOMEPAGE="https://www.xenproject.org"
+LICENSE="GPL-2"
+SLOT="0"
+IUSE="custom-cflags debug efi flask"
+
+DEPEND="${PYTHON_DEPS}
+	efi? ( >=sys-devel/binutils-2.22[multitarget] )
+	!efi? ( >=sys-devel/binutils-2.22 )"
+RDEPEND=""
+PDEPEND="~app-emulation/xen-tools-${PV}"
+
+# no tests are available for the hypervisor
+# prevent the silliness of /usr/lib/debug/usr/lib/debug files
+# prevent stripping of the debug info from the /usr/lib/debug/xen-syms
+RESTRICT="test splitdebug strip"
+
+# Approved by QA team in bug #144032
+QA_WX_LOAD="boot/xen-syms-${PV}"
+
+REQUIRED_USE="arm? ( debug )"
+
+S="${WORKDIR}/${MY_P}"
+
+pkg_setup() {
+	python-any-r1_pkg_setup
+	if [[ -z ${XEN_TARGET_ARCH} ]]; then
+		if use amd64; then
+			export XEN_TARGET_ARCH="x86_64"
+		elif use arm; then
+			export XEN_TARGET_ARCH="arm32"
+		elif use arm64; then
+			export XEN_TARGET_ARCH="arm64"
+		else
+			die "Unsupported architecture!"
+		fi
+	fi
+
+	if use flask ; then
+		export "XSM_ENABLE=y"
+		export "FLASK_ENABLE=y"
+	fi
+}
+
+src_prepare() {
+	# Upstream's patchset
+	[[ -n ${UPSTREAM_VER} ]] && eapply "${WORKDIR}"/patches-upstream
+
+	# Security patchset
+	if [[ -n ${SECURITY_VER} ]]; then
+	einfo "Try to apply Xen Security patch set"
+		# apply main xen patches
+		# Two parallel systems, both work side by side
+		# Over time they may concdense into one. This will suffice for now
+		source "${WORKDIR}"/patches-security/${PV}.conf
+
+		local i
+		for i in ${XEN_SECURITY_MAIN}; do
+			eapply "${WORKDIR}"/patches-security/xen/$i
+		done
+	fi
+
+	# Gentoo's patchset
+	[[ -n ${GENTOO_VER} ]] && eapply "${WORKDIR}"/patches-gentoo
+
+	eapply "${FILESDIR}"/${PN}-4.6-efi.patch
+
+	# Drop .config
+	sed -e '/-include $(XEN_ROOT)\/.config/d' -i Config.mk || die "Couldn't	drop"
+
+	if use efi; then
+		export EFI_VENDOR="gentoo"
+		export EFI_MOUNTPOINT="boot"
+	fi
+
+	# if the user *really* wants to use their own custom-cflags, let them
+	if use custom-cflags; then
+		einfo "User wants their own CFLAGS - removing defaults"
+		# try and remove all the default custom-cflags
+		find "${S}" -name Makefile -o -name Rules.mk -o -name Config.mk -exec sed \
+			-e 's/CFLAGS\(.*\)=\(.*\)-O3\(.*\)/CFLAGS\1=\2\3/' \
+			-e 's/CFLAGS\(.*\)=\(.*\)-march=i686\(.*\)/CFLAGS\1=\2\3/' \
+			-e 's/CFLAGS\(.*\)=\(.*\)-fomit-frame-pointer\(.*\)/CFLAGS\1=\2\3/' \
+			-e 's/CFLAGS\(.*\)=\(.*\)-g3*\s\(.*\)/CFLAGS\1=\2 \3/' \
+			-e 's/CFLAGS\(.*\)=\(.*\)-O2\(.*\)/CFLAGS\1=\2\3/' \
+			-i {} \; || die "failed to re-set custom-cflags"
+	fi
+
+	default
+}
+
+src_configure() {
+	use arm && myopt="${myopt} CONFIG_EARLY_PRINTK=sun7i"
+
+	use debug && myopt="${myopt} debug=y"
+
+	if use custom-cflags; then
+		filter-flags -fPIE -fstack-protector
+		replace-flags -O3 -O2
+	else
+		unset CFLAGS
+		unset LDFLAGS
+		unset ASFLAGS
+	fi
+}
+
+src_compile() {
+	# Send raw LDFLAGS so that --as-needed works
+	emake V=1 CC="$(tc-getCC)" LDFLAGS="$(raw-ldflags)" LD="$(tc-getLD)" -C xen ${myopt}
+}
+
+src_install() {
+	local myopt
+	use debug && myopt="${myopt} debug=y"
+
+	# The 'make install' doesn't 'mkdir -p' the subdirs
+	if use efi; then
+		mkdir -p "${D}"${EFI_MOUNTPOINT}/efi/${EFI_VENDOR} || die
+	fi
+
+	emake LDFLAGS="$(raw-ldflags)" DESTDIR="${D}" -C xen ${myopt} install
+
+	# make install likes to throw in some extra EFI bits if it built
+	use efi || rm -rf "${D}/usr/$(get_libdir)/efi"
+}
+
+pkg_postinst() {
+	elog "Official Xen Guide:"
+	elog " https://wiki.gentoo.org/wiki/Xen"
+
+	use efi && einfo "The efi executable is installed in boot/efi/gentoo"
+
+	elog "You can optionally block the installation of /boot/xen-syms by an entry"
+	elog "in folder /etc/portage/env using the portage's feature INSTALL_MASK"
+	elog "e.g. echo ${msg} > /etc/portage/env/xen.conf"
+}