--- /dev/null
+# Copyright 1999-2018 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+EAPI="6"
+
+inherit linux-info toolchain-funcs mount-boot
+
+# Find updates by searching and clicking the first link (hopefully it's the one):
+# https://www.intel.com/content/www/us/en/search.html?keyword=Processor+Microcode+Data+File
+
+COLLECTION_SNAPSHOT="${PV##*_p}"
+INTEL_SNAPSHOT="${PV/_p*}"
+NUM="28087"
+DESCRIPTION="Intel IA32/IA64 microcode update data"
+HOMEPAGE="http://inertiawar.com/microcode/ https://downloadcenter.intel.com/Detail_Desc.aspx?DwnldID=${NUM}"
+SRC_URI="https://downloadmirror.intel.com/${NUM}/eng/microcode-${INTEL_SNAPSHOT}.tgz
+ https://dev.gentoo.org/~whissi/dist/intel-microcode/intel-microcode-collection-${COLLECTION_SNAPSHOT}.tar.xz"
+
+LICENSE="intel-ucode"
+SLOT="0"
+KEYWORDS="-* amd64 x86"
+IUSE="hostonly initramfs +split-ucode vanilla"
+REQUIRED_USE="|| ( initramfs split-ucode )"
+
+DEPEND="sys-apps/iucode_tool"
+
+# !<sys-apps/microcode-ctl-1.17-r2 due to bug #268586
+RDEPEND="hostonly? ( sys-apps/iucode_tool )"
+
+RESTRICT="binchecks bindist mirror strip"
+
+S=${WORKDIR}
+
+# Blacklist bad microcode here.
+# 0x000406f1 aka 06-4f-01 aka CPUID 406F1 require newer microcode loader
+MICROCODE_BLACKLIST_DEFAULT="-s !0x000406f1"
+
+# In case we want to set some defaults ...
+MICROCODE_SIGNATURES_DEFAULT=""
+
+# Advanced users only!
+# Set MIRCOCODE_SIGNATURES to merge with:
+# only current CPU: MICROCODE_SIGNATURES="-S"
+# only specific CPU: MICROCODE_SIGNATURES="-s 0x00000f4a -s 0x00010676"
+# exclude specific CPU: MICROCODE_SIGNATURES="-s !0x00000686"
+
+pkg_pretend() {
+ use initramfs && mount-boot_pkg_pretend
+}
+
+src_prepare() {
+ default
+
+ # Prevent "invalid file format" errors from iucode_tool
+ rm -f "${S}"/intel-ucod*/list || die
+}
+
+src_install() {
+ # This will take ALL of the upstream microcode sources:
+ # - microcode.dat
+ # - intel-ucode/
+ # In some cases, they have not contained the same content (eg the directory has newer stuff).
+ MICROCODE_SRC=(
+ "${S}"/intel-ucode/
+ "${S}"/intel-ucode-with-caveats/
+ )
+
+ # Allow users who are scared about microcode updates not included in Intel's official
+ # microcode tarball to opt-out and comply with Intel marketing
+ if ! use vanilla; then
+ MICROCODE_SRC+=( "${S}"/intel-microcode-collection-${COLLECTION_SNAPSHOT} )
+ fi
+
+ # These will carry into pkg_preinst via env saving.
+ : ${MICROCODE_BLACKLIST=${MICROCODE_BLACKLIST_DEFAULT}}
+ : ${MICROCODE_SIGNATURES=${MICROCODE_SIGNATUES_DEFAULT}}
+
+ opts=(
+ ${MICROCODE_BLACKLIST}
+ ${MICROCODE_SIGNATURES}
+ # be strict about what we are doing
+ --overwrite
+ --strict-checks
+ --no-ignore-broken
+ # we want to install latest version
+ --no-downgrade
+ # show everything we find
+ --list-all
+ # show what we selected
+ --list
+ )
+
+ # The earlyfw cpio needs to be in /boot because it must be loaded before
+ # rootfs is mounted.
+ use initramfs && dodir /boot && opts+=( --write-earlyfw="${ED%/}"/boot/intel-uc.img )
+
+ keepdir /lib/firmware/intel-ucode
+ opts+=( --write-firmware="${ED%/}/lib/firmware/intel-ucode" )
+
+ iucode_tool \
+ "${opts[@]}" \
+ "${MICROCODE_SRC[@]}" \
+ || die "iucode_tool ${opts[@]} ${MICROCODE_SRC[@]}"
+
+ dodoc releasenote
+}
+
+pkg_preinst() {
+ if [[ ${MICROCODE_BLACKLIST} != ${MICROCODE_BLACKLIST_DEFAULT} ]]; then
+ ewarn "MICROCODE_BLACKLIST is set to \"${MICROCODE_BLACKLIST}\" instead of default \"${MICROCODE_BLACKLIST_DEFAULT}\". You are on your own!"
+ fi
+
+ if [[ ${MICROCODE_SIGNATURES} != ${MICROCODE_SIGNATURES_DEFAULT} ]]; then
+ ewarn "Package was created using advanced options:"
+ ewarn "MICROCODE_SIGNATURES is set to \"${MICROCODE_SIGNATURES}\" instead of default \"${MICROCODE_SIGNATURES_DEFAULT}\"!"
+ fi
+
+ # Make sure /boot is available if needed.
+ use initramfs && mount-boot_pkg_preinst
+
+ local _initramfs_file="${ED%/}/boot/intel-uc.img"
+
+ if use hostonly; then
+ # While this output looks redundant we do this check to detect
+ # rare cases where iucode_tool was unable to detect system's processor(s).
+ local _detected_processors=$(iucode_tool --scan-system 2>&1)
+ if [[ -z "${_detected_processors}" ]]; then
+ ewarn "Looks like iucode_tool was unable to detect any processor!"
+ else
+ einfo "Only installing ucode(s) for ${_detected_processors#iucode_tool: system has } due to USE=hostonly ..."
+ fi
+
+ opts=(
+ --scan-system
+ # be strict about what we are doing
+ --overwrite
+ --strict-checks
+ --no-ignore-broken
+ # we want to install latest version
+ --no-downgrade
+ # show everything we find
+ --list-all
+ # show what we selected
+ --list
+ )
+
+ # The earlyfw cpio needs to be in /boot because it must be loaded before
+ # rootfs is mounted.
+ use initramfs && opts+=( --write-earlyfw=${_initramfs_file} )
+
+ if use split-ucode; then
+ opts+=( --write-firmware="${ED%/}/lib/firmware/intel-ucode" )
+ fi
+
+ opts+=( "${ED%/}"/lib/firmware/intel-ucode-temp )
+
+ mv "${ED%/}"/lib/firmware/intel-ucode{,-temp} || die
+ keepdir /lib/firmware/intel-ucode
+
+ iucode_tool "${opts[@]}" || die "iucode_tool ${opts[@]}"
+
+ rm -r "${ED%/}"/lib/firmware/intel-ucode-temp || die
+
+ elif ! use split-ucode; then # hostonly disabled
+ rm -r "${ED%/}"/lib/firmware/intel-ucode || die
+ fi
+
+ # Because it is possible that this package will install not one single file
+ # due to user selection which is still somehow unexpected we add the following
+ # check to inform user so that the user has at least a chance to detect
+ # a problem/invalid select.
+ local _has_installed_something=
+ if use initramfs && [[ -s "${_initramfs_file}" ]]; then
+ _has_installed_something="yes"
+ elif use split-ucode; then
+ _has_installed_something=$(find "${ED%/}/lib/firmware/intel-ucode" -maxdepth 0 -not -empty -exec echo yes \;)
+ fi
+
+ if use hostonly && [[ -n "${_has_installed_something}" ]]; then
+ elog "You only installed ucode(s) for all currently available (=online)"
+ elog "processor(s). Remember to re-emerge this package whenever you"
+ elog "change the system's processor model."
+ elog ""
+ elif [[ -z "${_has_installed_something}" ]]; then
+ ewarn "WARNING:"
+ if [[ ${MICROCODE_SIGNATURES} != ${MICROCODE_SIGNATURES_DEFAULT} ]]; then
+ ewarn "No ucode was installed! Because you have created this package"
+ ewarn "using MICROCODE_SIGNATURES variable please double check if you"
+ ewarn "have an invalid select."
+ ewarn "It's rare but it is also possible that just no ucode update"
+ ewarn "is available for your processor(s). In this case it is safe"
+ ewarn "to ignore this warning."
+ else
+ ewarn "No ucode was installed! It's rare but it is also possible"
+ ewarn "that just no ucode update is available for your processor(s)."
+ ewarn "In this case it is safe to ignore this warning."
+ fi
+
+ ewarn ""
+
+ if use hostonly; then
+ ewarn "Unset \"hostonly\" USE flag to install all available ucodes."
+ ewarn ""
+ fi
+ fi
+}
+
+pkg_prerm() {
+ # Make sure /boot is mounted so that we can remove /boot/intel-uc.img!
+ use initramfs && mount-boot_pkg_prerm
+}
+
+pkg_postrm() {
+ # Don't forget to umount /boot if it was previously mounted by us.
+ use initramfs && mount-boot_pkg_postrm
+}
+
+pkg_postinst() {
+ # Don't forget to umount /boot if it was previously mounted by us.
+ use initramfs && mount-boot_pkg_postinst
+
+ # We cannot give detailed information if user is affected or not:
+ # If MICROCODE_BLACKLIST wasn't modified, user can still use MICROCODE_SIGNATURES
+ # to to force a specific, otherwise blacklisted, microcode. So we
+ # only show a generic warning based on running kernel version:
+ if kernel_is -lt 4 14 34; then
+ ewarn "${P} contains microcode updates which require"
+ ewarn "additional kernel patches which aren't yet included in kernel <4.14.34."
+ ewarn "Loading such a microcode through kernel interface from an unpatched kernel"
+ ewarn "can crash your system!"
+ ewarn ""
+ ewarn "Those microcodes are blacklisted per default. However, if you have altered"
+ ewarn "MICROCODE_BLACKLIST or MICROCODE_SIGNATURES, you maybe have unintentionally"
+ ewarn "re-enabled those microcodes...!"
+ ewarn ""
+ ewarn "Check \"${EROOT%/}/usr/share/doc/${PN}-*/releasenot*\" if your microcode update"
+ ewarn "requires additional kernel patches or not."
+ fi
+}
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