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https://gitlab.com/nonguix/nonguix.git
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62a5df4222
Fixes https://gitlab.com/nonguix/nonguix/-/issues/224 * *.scm: Use SPDX license identifier and remove obsolete license statement.
87 lines
3.7 KiB
Scheme
87 lines
3.7 KiB
Scheme
;;; SPDX-License-Identifier: GPL-3.0-or-later
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;;; Copyright © 2020 Alex Griffin <a@ajgrf.com>
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(define-module (nongnu system linux-initrd)
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#:use-module (gnu system linux-initrd)
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#:use-module (guix gexp)
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#:use-module (guix modules)
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#:use-module (guix utils)
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#:use-module (nongnu packages linux)
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#:use-module (nonguix modules)
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#:export (microcode-initrd))
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;; See https://www.kernel.org/doc/Documentation/x86/microcode.txt
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(define* (microcode-initrd file-systems
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#:key
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(initrd base-initrd)
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(microcode-packages (list amd-microcode
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intel-microcode))
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#:allow-other-keys
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#:rest rest)
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"Build INITRD, extended to include x86 processor microcode from
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MICROCODE-PACKAGES."
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(let ((args (strip-keyword-arguments '(#:initrd #:microcode-packages) rest)))
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(combined-initrd (microcode-initrd* microcode-packages)
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(apply initrd file-systems
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args))))
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(define (microcode-initrd* microcode-packages)
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"Build an uncompressed initrd containing x86 processor microcode from
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MICROCODE-PACKAGES, in the format expected by the kernel."
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(define builder
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(with-imported-modules (source-module-closure
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'((gnu build linux-initrd)
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(guix build utils)
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(nonguix build utils))
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#:select? import-nonguix-module?)
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#~(begin
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(use-modules (gnu build linux-initrd)
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(guix build utils)
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(nonguix build utils))
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(let* ((initrd (string-append #$output "/initrd.cpio"))
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(dest-dir "kernel/x86/microcode")
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(amd-bin (string-append dest-dir "/AuthenticAMD.bin"))
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(intel-bin (string-append dest-dir "/GenuineIntel.bin")))
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(mkdir-p dest-dir)
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(for-each
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(lambda (package)
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(let ((intel-ucode (string-append package
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"/lib/firmware/intel-ucode"))
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(amd-ucode (string-append package
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"/lib/firmware/amd-ucode")))
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(when (directory-exists? intel-ucode)
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(concatenate-files (find-files intel-ucode ".*")
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intel-bin))
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(when (directory-exists? amd-ucode)
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(concatenate-files (find-files amd-ucode
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"^microcode_amd.*\\.bin$")
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amd-bin))))
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'#$microcode-packages)
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(mkdir-p #$output)
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(write-cpio-archive initrd "kernel" #:compress? #f)))))
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(file-append (computed-file "microcode-initrd" builder)
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"/initrd.cpio"))
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(define (combined-initrd . initrds)
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"Return a combined initrd, the result of concatenating INITRDS."
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(define builder
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(with-imported-modules (source-module-closure
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'((guix build utils)
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(nonguix build utils))
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#:select? import-nonguix-module?)
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#~(begin
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(use-modules (guix build utils)
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(nonguix build utils))
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;; Use .img suffix since the result is no longer easily inspected by
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;; standard tools like cpio and gzip.
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(let ((initrd (string-append #$output "/initrd.img")))
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(mkdir-p #$output)
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(concatenate-files '#$initrds initrd)))))
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(file-append (computed-file "combined-initrd" builder)
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"/initrd.img"))
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