Marc S. Weidner
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Signed-off-by: Marc S. Weidner <msw@coresecret.dev>
56 lines
2.1 KiB
Bash
56 lines
2.1 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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# 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: Successfully executed commands.
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#######################################
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installation_microcode() {
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declare var_microcode_pkgs=""
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declare var_whereiam; var_whereiam=$(virt-what | head -n1)
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[[ -z "${var_whereiam}" ]] && var_whereiam="baremetal"
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declare var_cpu_vendor; var_cpu_vendor=$(lscpu | awk -F: '/Vendor ID/ {print $2}' | xargs)
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case "${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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""|*ARM*|*arm*|*) var_microcode_pkgs=""; do_log "info" "true" "ARM or unknown CPU detected – skipping microcode install" ;;
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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 ! do_in_target "${TARGET}" dpkg -l "${var_microcode_pkgs}" >/dev/null 2>&1; then
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do_in_target "${TARGET}" apt-get install -y "${var_microcode_pkgs}"
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fi
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else
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do_log "info" "true" "Skipping microcode install (${var_whereiam}, ${var_microcode_pkgs:-none})"
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fi
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return 0
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}
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# vim: number et ts=2 sw=2 sts=2 ai tw=128 ft=sh
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