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UEFI: support GRUB boot on aarch64 #22

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Merged
zeha merged 3 commits into from
Jan 13, 2026
Merged

UEFI: support GRUB boot on aarch64 #22

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fc6fe81
Rename x64 boot file to bootx64.efi
zeha Jan 12, 2026
90d997f
UEFI boot: use GRUB directly if shim is not available
zeha Jan 12, 2026
96fbb6b
UEFI: support GRUB boot on aarch64
zeha Jan 12, 2026
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4 changes: 2 additions & 2 deletions debian/control
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Original file line number Diff line number Diff line change
Expand Up @@ -16,13 +16,13 @@ Architecture: all
Depends: atftpd,
dialog,
grml2usb,
grub-efi-amd64-signed | grub-efi-amd64-bin | pxelinux,
grub-efi-amd64-signed | grub-efi-amd64-bin | grub-efi-arm64-signed | grub-efi-arm64-bin | pxelinux,
ipcalc,
iptables,
isc-dhcp-server,
nfs-kernel-server,
pxelinux,
shim-signed:amd64 | pxelinux,
shim-signed:amd64 | shim-signed:arm64 | pxelinux,
${misc:Depends},
Description: terminalserver for grml to boot via PXE
These packages provides all what's needed to boot
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5 changes: 3 additions & 2 deletions templates/dhcpd_config
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Expand Up @@ -61,12 +61,13 @@ subnet $NETWORK_ netmask $NETMASK_ {
class "pxeclients" {
match if substring (option vendor-class-identifier, 0 ,9) = "PXEClient";
if option architecture-type = 00:07 {
filename "shim.efi";
filename "bootx64.efi";
} elsif option architecture-type = 00:0b {
filename "bootaa64.efi";
} else {
filename "pxelinux.0";
}
}
}

EOT

77 changes: 53 additions & 24 deletions templates/grub-shim_config
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Original file line number Diff line number Diff line change
Expand Up @@ -17,32 +17,61 @@
#
# GLOBAL_README_END

if [ -r "${TFTPD_DATA_DIR_}"/shim.efi ] ; then
echo "${TFTPD_DATA_DIR_}/shim.efi exists already, nothing to do."
elif [ -r /usr/lib/shim/shimx64.efi.signed ] ; then
echo "Installing /usr/lib/shim/shimx64.efi.signed as shim.efi for TFTP usage"
cp /usr/lib/shim/shimx64.efi.signed "${TFTPD_DATA_DIR_}"/shim.efi
elif [ -r /usr/lib/shim/shimx64.efi ] ; then
echo "Installing /usr/lib/shim/shimx64.efi as shim.efi for TFTP usage"
cp /usr/lib/shim/shimx64.efi "${TFTPD_DATA_DIR_}"/shim.efi
else
echo "WARN: No shimx64.efi for usage with PXE boot found, not setting up UEFI boot via GRUB."
(( ret_=ret_+ $? ))
return "$ret_"
if [ "$(uname -m)" = "x86_64" ]; then
if [ -r "${TFTPD_DATA_DIR_}"/grubx64.efi ] ; then
echo "${TFTPD_DATA_DIR_}/grubx64.efi exists already, nothing to do."
elif [ -r /usr/lib/grub/x86_64-efi-signed/grubnetx64.efi.signed ] ; then
echo "Installing /usr/lib/grub/x86_64-efi-signed/grubnetx64.efi.signed as grubx64.efi for TFTP usage"
cp /usr/lib/grub/x86_64-efi-signed/grubnetx64.efi.signed "${TFTPD_DATA_DIR_}"/grubx64.efi
elif [ -r /usr/lib/grub/x86_64-efi/monolithic/grubnetx64.efi ] ; then
echo "Installing /usr/lib/grub/x86_64-efi/monolithic/grubnetx64.efi as grubx64.efi for TFTP usage"
cp /usr/lib/grub/x86_64-efi/monolithic/grubnetx64.efi "${TFTPD_DATA_DIR_}"/grubx64.efi
else
echo "WARN: No grubnetx64.efi for usage with PXE boot found, not setting up UEFI boot via GRUB."
(( ret_=ret_+ $? ))
return "$ret_"
fi

if [ -r "${TFTPD_DATA_DIR_}"/bootx64.efi ] ; then
echo "${TFTPD_DATA_DIR_}/bootx64.efi exists already, nothing to do."
elif [ -r /usr/lib/shim/shimx64.efi.signed ] ; then
echo "Installing /usr/lib/shim/shimx64.efi.signed as bootx64.efi for TFTP usage"
cp /usr/lib/shim/shimx64.efi.signed "${TFTPD_DATA_DIR_}"/bootx64.efi
elif [ -r /usr/lib/shim/shimx64.efi ] ; then
echo "Installing /usr/lib/shim/shimx64.efi as bootx64.efi for TFTP usage"
cp /usr/lib/shim/shimx64.efi "${TFTPD_DATA_DIR_}"/bootx64.efi
else
echo "WARN: No shimx64.efi for usage with PXE boot found. Using GRUB directly as bootx64.efi."
cp "${TFTPD_DATA_DIR_}"/grubx64.efi "${TFTPD_DATA_DIR_}"/bootx64.efi
fi
fi
if [ "$(uname -m)" = "aarch64" ]; then
if [ -r "${TFTPD_DATA_DIR_}"/grubaa64.efi ] ; then
echo "${TFTPD_DATA_DIR_}/grubaa64.efi exists already, nothing to do."
elif [ -r /usr/lib/grub/arm64-efi-signed/grubnetaa64.efi.signed ] ; then
echo "Installing /usr/lib/grub/arm64-efi-signed/grubnetaa64.efi.signed as grubaa64.efi for TFTP usage"
cp /usr/lib/grub/arm64-efi-signed/grubnetaa64.efi.signed "${TFTPD_DATA_DIR_}"/grubaa64.efi
elif [ -r /usr/lib/grub/arm64-efi/monolithic/grubnetaa64.efi ] ; then
echo "Installing /usr/lib/grub/arm64-efi/monolithic/grubnetaa64.efi as grubaa64.efi for TFTP usage"
cp /usr/lib/grub/arm64-efi/monolithic/grubnetaa64.efi "${TFTPD_DATA_DIR_}"/grubaa64.efi
else
echo "WARN: No grubnetaa64.efi for usage with PXE boot found, not setting up UEFI boot via GRUB."
(( ret_=ret_+ $? ))
return "$ret_"
fi

if [ -r "${TFTPD_DATA_DIR_}"/grubx64.efi ] ; then
echo "${TFTPD_DATA_DIR_}/grubx64.efi exists already, nothing to do."
elif [ -r /usr/lib/grub/x86_64-efi-signed/grubnetx64.efi.signed ] ; then
echo "Installing /usr/lib/grub/x86_64-efi-signed/grubnetx64.efi.signed as grubx64.efi for TFTP usage"
cp /usr/lib/grub/x86_64-efi-signed/grubnetx64.efi.signed "${TFTPD_DATA_DIR_}"/grubx64.efi
elif [ -r /usr/lib/grub/x86_64-efi/monolithic/grubnetx64.efi ] ; then
echo "Installing /usr/lib/grub/x86_64-efi/monolithic/grubnetx64.efi as grubx64.efi for TFTP usage"
cp /usr/lib/grub/x86_64-efi/monolithic/grubnetx64.efi "${TFTPD_DATA_DIR_}"/grubx64.efi
else
echo "WARN: No grubnetx64.efi for usage with PXE boot found, not setting up UEFI boot via GRUB."
(( ret_=ret_+ $? ))
return "$ret_"
if [ -r "${TFTPD_DATA_DIR_}"/bootaa64.efi ] ; then
echo "${TFTPD_DATA_DIR_}/bootaa64.efi exists already, nothing to do."
elif [ -r /usr/lib/shim/shimaa64.efi.signed ] ; then
echo "Installing /usr/lib/shim/shimaa64.efi.signed as bootaa64.efi for TFTP usage"
cp /usr/lib/shim/shimaa64.efi.signed "${TFTPD_DATA_DIR_}"/bootaa64.efi
elif [ -r /usr/lib/shim/shimaa64.efi ] ; then
echo "Installing /usr/lib/shim/shimaa64.efi as bootaa64.efi for TFTP usage"
cp /usr/lib/shim/shimaa64.efi "${TFTPD_DATA_DIR_}"/bootaa64.efi
else
echo "WARN: No shimaa64.efi for usage with PXE boot found. Using GRUB directly as bootaa64.efi."
cp "${TFTPD_DATA_DIR_}"/grubaa64.efi "${TFTPD_DATA_DIR_}"/bootaa64.efi
fi
fi

if [ -r "${TFTPD_DATA_DIR_}"/grub/fonts/unicode.pf2 ] ; then
Expand Down