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c09d21cbcf
* nonguix/modules.scm: New file. * nongnu/system/linux-initrd.scm: Limit 'source-module-closure' to guix and nonguix modules only.
99 lines
4.3 KiB
Scheme
99 lines
4.3 KiB
Scheme
;;; Copyright © 2020 Alex Griffin <a@ajgrf.com>
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;;;
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;;; This program is free software: you can redistribute it and/or modify
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;;; it under the terms of the GNU General Public License as published by
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;;; the Free Software Foundation, either version 3 of the License, or
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;;; (at your option) any later version.
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;;;
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;;; This program is distributed in the hope that it will be useful,
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;;; but WITHOUT ANY WARRANTY; without even the implied warranty of
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;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;;; GNU General Public License for more details.
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;;;
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;;; You should have received a copy of the GNU General Public License
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;;; along with this program. If not, see <https://www.gnu.org/licenses/>.
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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? nonguix-module-name?)
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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? nonguix-module-name?)
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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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