Marc S. Weidner
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Signed-off-by: Marc S. Weidner <msw@coresecret.dev>
83 lines
3.1 KiB
Bash
83 lines
3.1 KiB
Bash
#!/bin/bash
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# SPDX-Version: 3.0
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# SPDX-CreationInfo: 2025-06-17; WEIDNER, Marc S.; <msw@coresecret.dev>
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# SPDX-ExternalRef: GIT https://git.coresecret.dev/msw/CISS.debian.installer.git
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# SPDX-FileContributor: WEIDNER, Marc S.; Centurion Intelligence Consulting Agency
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# SPDX-FileCopyrightText: 2024-2025; WEIDNER, Marc S.; <msw@coresecret.dev>
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# SPDX-FileType: SOURCE
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# SPDX-License-Identifier: EUPL-1.2 OR LicenseRef-CCLA-1.0
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# SPDX-LicenseComment: This file is part of the CISS.debian.installer.secure framework.
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# SPDX-PackageName: CISS.debian.installer
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# SPDX-Security-Contact: security@coresecret.eu
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guard_sourcing
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#######################################
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# Install microcode updates depending on architecture (amd64, arm64, intel64) and environment (Baremetal, VM).
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# Every 'apt-get install' command is invoked by adding 'export INITRD=No'
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# to suppress the 'update-initramfs'-Kernel-Hooks, according to the initramfs-tools manpage:
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# https://manpages.debian.org/testing/initramfs-tools-core/initramfs-tools.7.en.html
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# Globals:
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# TARGET
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# Arguments:
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# None
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# Returns:
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# 0: on success
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#######################################
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installation_microcode() {
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### Declare Arrays, HashMaps, and Variables.
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declare var_microcode_pkgs="" var_whereiam="" var_cpu_vendor=""
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declare -r var_logfile="/root/.ciss/cdi/log/4140_installation_microcode.log"
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chroot_logger "${TARGET}${var_logfile}"
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# shellcheck disable=SC2312
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if [[ -x "$(command -v virt-what)" ]]; then
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var_whereiam=$(virt-what | head -n1)
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else
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var_whereiam=$(grep -iE 'kvm|vmware|qemu' /sys/class/dmi/id/product_name 2>/dev/null || echo "baremetal")
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fi
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# shellcheck disable=SC2312
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var_cpu_vendor=$(</proc/cpuinfo grep 'vendor_id' | head -n1 | cut -d: -f2 | xargs)
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case "${var_cpu_vendor}" in
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*AuthenticAMD*) var_microcode_pkgs="amd64-microcode" ;;
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*GenuineIntel*) var_microcode_pkgs="intel-microcode" ;;
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*) do_log "info" "file_only" "4140() Unknown or unsupported CPU vendor: '${var_cpu_vendor}', skipping." ;;
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esac
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###########################################################################################
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# Generally, it is best to let the hypervisor handle CPU microcode updates. #
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###########################################################################################
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if [[ "${var_whereiam}" != "kvm" && -n "${var_microcode_pkgs}" ]]; then
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if ! chroot_script "${TARGET}" "dpkg -s ${var_microcode_pkgs} >/dev/null 2>&1"; then
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chroot_script "${TARGET}" "
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export INITRD=No
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apt-get install -y --no-install-recommends --no-install-suggests ${var_microcode_pkgs} 2>&1 | tee -a ${var_logfile}
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"
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else
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chroot_script "${TARGET}" "
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export INITRD=No
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apt-get install -y --no-install-recommends --no-install-suggests --only-upgrade ${var_microcode_pkgs} 2>&1 | tee -a ${var_logfile}
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"
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fi
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else
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do_log "info" "file_only" "4140() Skipping microcode install [${var_whereiam}, ${var_microcode_pkgs:-none}]."
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fi
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guard_dir && return 0
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}
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### Prevents accidental 'unset -f'.
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# shellcheck disable=SC2034
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readonly -f installation_microcode
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# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=sh
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