Merge branch 'wip-linux-libre-64' of git://git.parabola.nu/abslibre/abslibre into wip-linux-libre-64wip-linux-libre-64

1 files changed, 113 insertions, 29 deletions

diff --git a/libre/linux-libre-64/PKGBUILD b/libre/linux-libre-64/PKGBUILD
index a75d06f1d..12c942541 100644
--- a/libre/linux-libre-64/PKGBUILD
+++ b/libre/linux-libre-64/PKGBUILD
@@ -1,4 +1,7 @@
 # Contributor: David P. <megver83@parabola.nu>
+# Maintainer (arch32): Erich Eckner <deep42thought@archlinux32.org>
+# Maintainer (arch32): Andreas Baumann <mail@andreasbaumann.cc>
+# Maintainer (archarm): Kevin Mihelich <kevin@archlinuxarm.org>
 # Contributor: André Silva <emulatorman@hyperbola.info>
 # Contributor: Márcio Silva <coadde@hyperbola.info>
 # Contributor: fauno <fauno@parabola.nu>
@@ -6,10 +9,58 @@
 # Contributor: Michał Masłowski <mtjm@mtjm.eu>
 # Contributor: Luke R. <g4jc@openmailbox.org>
 # Contributor: Andreas Grapentin <andreas@grapentin.org>
-# Maintainers: Parabola hackers <dev@lists.parabola.nu>
+# Maintainer: Parabola Hackers <dev@lists.parabola.nu>
 
 # Based on linux package
-# Based on linux-libre package, actually - megver83 will become maintainer eventually
+
+# Rationale: This package enables to run 64bit kernels with 32bit rootfs.
+#
+# For armv7k/aarch64, we have no aarch64 port yet, and the 32bit
+# kernels don't work for 64bit computers (no 64bit DTB files, etc).
+#
+# In turn if we can boot Parabola on these computers, it enables
+# people to work on an aarch64 port more easily as chrooting in 64bit
+# rootfs from 32bit rootfs work when we have a 64bit kernel (tested on
+# an x86_64 computer with a Parabola i686 rootfs and a Parabola x86_64
+# chroot).
+#
+# This enable to make rootfs that work on both 64bit and 32bit
+# computers. In that case the user will still need to select the right
+# kernel at boot.
+#
+# Generally speaking it also enable users to benefit from many of the
+# improvements of 64bit kernels (ability to chroot in 64bit rootfs,
+# better security, 4GiB address space per process instead of 3GiB for
+# 32bit rootfs, etc) without having to reinstall everything. In
+# addition, there was and is still no conversion guide to convert a
+# 32bit Parabola installation to 64bit), and in some cases (lot of
+# self-built software in /usr/local, PostgreSQL database, etc) the
+# migration to 64bit requires some work.
+#
+# As for using i686 for new installation on x86_64 computers, it can
+# enable people doing that to find and fix bugs on Parabola i686 to
+# enable people with 32bit-only computers (like Libreboot compatible
+# I945 Thinkpads) to still be able to use Parabola.
+#
+# Having both architectures (arm and x86) in the same PKGBUILD enables
+# to more widely test this package (if we find issues on x86, they'll
+# most likely apply to arm as well). Though it can become a problem if
+# we need different kernel versions for both architectures.
+#
+# Status:
+# - Tested on both arm and x86.
+# - The build is currently broken on ARM due to a missing cross
+#   compiler for armv7h (it was accidentally removed and it doesn't
+#   build anymore).
+# - External modules (like Wireguard or tp_smapi) also need to be
+#   cross compiled. So modules for linux-libre-64 need to be added
+#   (like tp_smapi-64) and dkms packages need to be adapted to also
+#   work for this kernel.
+# - Some software (like building Guix) break with 32bit rootfs and
+#   64bit kernels due to wrong assumption about the number of bits,
+#   through other software (like building rust with mrustc) work
+#   better (here because we have 3GiB instead of 3GiB of memory per
+#   process). Most software is not affected though.
 
 # WIP: This PKGBUILD is derived from the 'linux-libre' PKGBUILD,
 #      and includes a lot of unused cruft, to minimize the diff.
@@ -32,9 +83,26 @@
 #      should be identical to the linux-libre PKGBUILD.
 #      In this way, the diff is minimal against the linux-libre PKGBUILD;
 #      and it is obvious which parts are intended to become aarch64-specific,
-#      or exist only for cross-compiling the aarch64 kernel for armv7h systems.
-
-
+#      or exist only for cross-compiling the 64-bit foreign kernels for armv7h and i686.
+#      After that, this PKGBUILD could be simplified, to focus only on the cross-compiled kernels.
+# comments:
+# TODO: repalce in 'linux-libre' PKGBUILD
+# cross-compile over-ride
+# TODO: merge into 'linux-libre' PKGBUILD
+
+
+# TODO: This is a bug (in the 'linux-libre' PKGBUILD) for migrations from archlinuxarm.
+#       _replacesarchkernel assumes that the upstream kernel packages are named like:
+#         - 'linux'          'linux-headers'
+#         - 'linux-hardened' 'linux-hardened-headers'
+#         - 'linux-lts'      'linux-lts-headers'
+#       That is true for arch and arch32; but archlinuxarm has no packages by those names.
+#       Archlinuxarm systems would have a kernel package named like:
+#         - 'linux-armv7'            'linux-armv7-headers'
+#         - 'linux-armv7-chromebook'
+#         - 'linux-veyron'           'linux-veyron-headers'
+#         - 'linux-aarch64'          'linux-aarch64-headers'
+#       so Parabola armv7h and aarch64 kernels would not replace any archlinuxarm kernel.
 _replacesarchkernel=('linux%') # '%' gets replaced with kernel suffix
 _replacesoldkernels=() # '%' gets replaced with kernel suffix
 _replacesoldmodules=() # '%' gets replaced with kernel suffix
@@ -43,18 +111,22 @@ pkgbase=linux-libre-64 # cross-compile over-ride
 pkgver=5.18.5
 pkgrel=2
 pkgdesc="The Linux-libre kernel and modules" # TODO: merge into 'linux-libre' PKGBUILD
-pkgdesc+=' 64-bit (aarch64) for Parabola armv7h' # cross-compile over-ride
 rcnver=5.18.2
 rcnrel=armv7-x6
 url='https://linux-libre.fsfla.org/'
 arch=(i686 x86_64 armv7h)
-arch=(armv7h) # cross-compile over-ride
+arch=(armv7h i686) # cross-compile over-ride
 license=(GPL2)
+conflicts_armv7h=(linux-libre-aarch64) # cross-compile over-ride
+replaces_armv7h=( linux-libre-aarch64) # cross-compile over-ride
+conflicts_i686=(  linux-libre-x86_64 ) # cross-compile over-ride
+replaces_i686=(   linux-libre-x86_64 ) # cross-compile over-ride
 makedepends=(
   bc libelf pahole cpio perl tar xz
   xmlto python-sphinx python-sphinx_rtd_theme graphviz imagemagick texlive-latexextra
 )
-makedepends_armv7h=(uboot-tools vboot-utils dtc) # required by linux-libre-chromebook
+makedepends_i686+=('x86_64-pc-linux-gnu-gcc')
+makedepends_armv7h=(kmod uboot-tools vboot-utils dtc) # required by linux-libre-chromebook
 makedepends_armv7h+=(aarch64-linux-gnu-gcc-initial) # cross-compile over-ride
 options=('!strip')
 _srcname=linux-5.18
@@ -62,6 +134,10 @@ source=(
   "https://linux-libre.fsfla.org/pub/linux-libre/releases/${_srcname##*-}-gnu/linux-libre-${_srcname##*-}-gnu.tar.xz"{,.sign}
   "https://linux-libre.fsfla.org/pub/linux-libre/releases/$pkgver-gnu/patch-${_srcname##*-}-gnu-$pkgver-gnu.xz"{,.sign}
   "https://repo.parabola.nu/other/linux-libre/logos/logo_linux_"{clut224.ppm,vga16.ppm,mono.pbm}{,.sig}
+  # TODO: Move (in linux-libre) config.i686 config.armv7h, linux-armv7h.preset,
+  #       and "kernel"{.its,.keyblock,_data_key.vbprivk}
+  #       into their respective source_<CARCH> arrays.
+  #       Rename linux-armv7h.preset to linux-arm.preset, or add a new one for aarch64.
   config.i686 config.x86_64 config.armv7h    # the main kernel config files
   linux-armv7h.preset                        # armv7h preset file for mkinitcpio ramdisk
   "kernel"{.its,.keyblock,_data_key.vbprivk} # files for signing Chromebooks kernels
@@ -79,6 +155,7 @@ source=(
 )
 source_i686=(
   # avoid using zstd compression in ultra mode (exhausts virtual memory)
+  # Arch Linux 32 patches
   no-ultra-zstd.patch
 )
 source_armv7h=(
@@ -150,9 +227,11 @@ _replacesarchkernel=("${_replacesarchkernel[@]/-64/}") # cross-compile over-ride
 case "$CARCH" in
   armv7h) KARCH=arm64 ; CROSS_COMPILE=aarch64-linux-gnu- ;; # cross-compile over-ride
   aarch64) KARCH=arm64;; # TODO: merge into 'linux-libre' PKGBUILD
+  i686) KARCH=x86;CROSS_COMPILE=x86_64-pc-linux-gnu-;; # cross-compile over-ride
   i686|x86_64) KARCH=x86;;
   armv7h) KARCH=arm;;
 esac
+pkgdesc+=" 64-bit (${CROSS_COMPILE%%-*}) for Parabola ${CARCH}" # cross-compile over-ride
 
 export KBUILD_BUILD_HOST=parabola
 export KBUILD_BUILD_USER=$pkgbase
@@ -252,16 +331,18 @@ _package() {
   conflicts+=("${_replacesarchkernel[@]}" "${_replacesoldkernels[@]}" "${_replacesoldmodules[@]}")
   replaces+=("${_replacesarchkernel[@]}" "${_replacesoldkernels[@]}" "${_replacesoldmodules[@]}")
   # cross-compile over-rides
-  # NOTE: Above is providing/replacing the archarm armv7h 'linux' with the armv7h 'linux-libre'.
-  #       We do not want this aarch64 'linux-libre-64' to provide nor replace the archarm armv7h 'linux';
-  #       for the obvious reason. Anyways, the parabola armv7h 'linux-libre' serves that purpose.
-  #       Below is providing/replacing 'linux-libre' and the obsoleted parabola 'linux-libre-aarch64'.
+  # NOTE: Above is providing an upstream 'linux{,-*}' (eg: linux, linux-hardened),
+  #       and replacing the same during migration to Parabola.
+  #       Below is providing 'linux-libre' for 'parabola-base',
+  #       and replacing the obsoleted parabola 'linux-libre-{aarch64,x86_64}'.
   #       These are defined analogously in _package-headers(), _package-docs(), and _package-chromebook().
-  conflicts=( ${conflicts[*]/linux*/} )                # cross-compile over-ride
-  replaces=(  ${replaces[*]/linux*/}  )                # cross-compile over-ride
-  provides_armv7h=(  linux-libre                     ) # cross-compile over-ride
-  conflicts_armv7h=( linux-libre linux-libre-aarch64 ) # cross-compile over-ride
-  replaces_armv7h=(  linux-libre linux-libre-aarch64 ) # cross-compile over-ride
+  provides+=( linux-libre             )    # cross-compile over-ride
+  conflicts=( ${conflicts[*]/linux*/} )    # cross-compile over-ride
+  replaces=(  ${replaces[*]/linux*/}  )    # cross-compile over-ride
+  conflicts_armv7h=( linux-libre-aarch64 ) # cross-compile over-ride
+  replaces_armv7h=(  linux-libre-aarch64 ) # cross-compile over-ride
+  conflicts_i686=(   linux-libre-x86_64  ) # cross-compile over-ride
+  replaces_i686=(    linux-libre-x86_64  ) # cross-compile over-ride
 
   cd $_srcname
   local kernver="$(<version)"
@@ -272,9 +353,9 @@ _package() {
   # https://github.com/systemd/systemd/commit/edda44605f06a41fb86b7ab8128dcf99161d2344
   # The default arm64 image target is 'Image.gz' (per `make -s image_name`);
   # but some u-boot configs/versions don't support that, so we build 'Image' instead.
-  # TODO: merge into 'linux-libre' PKGBUILD
-  [[ "$KARCH" == 'arm64' ]]                                   && \
-  install -Dm644 arch/$KARCH/boot/Image "$modulesdir/vmlinuz" || \
+  # TODO: merge into 'linux-libre' PKGBUILD (actually [[ "$CARCH" == 'aarch64' ]])
+  [[ "$KARCH" == 'arm64' ]]                                   && # cross-compile over-ride
+  install -Dm644 arch/$KARCH/boot/Image "$modulesdir/vmlinuz" ||
   install -Dm644 "$(make -s image_name)" "$modulesdir/vmlinuz"
 
   # FIXME: aarch64 - the kernel is not installed under /boot
@@ -297,6 +378,9 @@ _package() {
     make ARCH=$KARCH CROSS_COMPILE=$CROSS_COMPILE INSTALL_DTBS_PATH="$pkgdir/boot/dtbs/$pkgbase" dtbs_install # cross-compile over-ride
 
     # armv7h presets only work with ALL_kver=$kernver
+    # TODO: kernel version auto-detection does not work for ARM kernels.
+    #       it may be best to not use auto-detection at all, and use the same mechanism
+    #       for all arches, eg: System.map or somthing simple like this below.
     backup=("etc/mkinitcpio.d/$pkgbase.preset")
     echo "Installing mkinitcpio preset..."
     sed "s|%PKGBASE%|$pkgbase|g;s|%KERNVER%|$kernver|g" ../linux-armv7h.preset \
@@ -311,10 +395,10 @@ _package-headers() {
   conflicts=("${_replacesarchkernel[@]/%/-headers}" "${_replacesoldkernels[@]/%/-headers}")
   replaces=("${_replacesarchkernel[@]/%/-headers}" "${_replacesoldkernels[@]/%/-headers}")
   # cross-compile over-rides - see note in _package()
-  conflicts=()                                                         # cross-compile over-ride
-  replaces=()                                                          # cross-compile over-ride
-  conflicts_armv7h=( linux-libre-headers linux-libre-aarch64-headers ) # cross-compile over-ride
-  replaces_armv7h=(  linux-libre-headers linux-libre-aarch64-headers ) # cross-compile over-ride
+  conflicts=()                                     # cross-compile over-ride
+  replaces=()                                      # cross-compile over-ride
+  conflicts_armv7h=( linux-libre-aarch64-headers ) # cross-compile over-ride
+  replaces_armv7h=(  linux-libre-aarch64-headers ) # cross-compile over-ride
 
   cd $_srcname
   local builddir="$pkgdir/usr/lib/modules/$(<version)/build"
@@ -345,7 +429,7 @@ _package-headers() {
   install -Dt "$builddir/arch/$KARCH/kernel" -m644 arch/$KARCH/kernel/asm-offsets.s
 
   # from linux-armv7
-  [[ "$KARCH" != 'arm64' ]] && # aarch64 over-ride
+  [[ "$KARCH" != 'arm64' ]] && # cross-compile  over-ride
   if [ "$CARCH" = "armv7h" ]; then
     for i in dove omap2; do
       mkdir -p "$builddir/arch/$KARCH/mach-$i"
@@ -422,10 +506,10 @@ _package-docs() {
   conflicts=("${_replacesarchkernel[@]/%/-docs}" "${_replacesoldkernels[@]/%/-docs}")
   replaces=("${_replacesarchkernel[@]/%/-docs}" "${_replacesoldkernels[@]/%/-docs}")
   # cross-compile over-rides - see note in _package()
-  conflicts=()                                                 # cross-compile over-ride
-  replaces=()                                                  # cross-compile over-ride
-  conflicts_armv7h=(linux-libre-docs linux-libre-aarch64-docs) # cross-compile over-ride
-  replaces_armv7h=( linux-libre-docs linux-libre-aarch64-docs) # cross-compile over-ride
+  conflicts=()                                # cross-compile over-ride
+  replaces=()                                 # cross-compile over-ride
+  conflicts_armv7h=(linux-libre-aarch64-docs) # cross-compile over-ride
+  replaces_armv7h=( linux-libre-aarch64-docs) # cross-compile over-ride
 
   cd $_srcname
   local builddir="$pkgdir/usr/lib/modules/$(<version)/build"