This small series addresses current problem with late loading of Intel microcode in OpenWrt. Following the commit messages [1] and later discussion, late loading off the microcode can be ineffective for some processors [2] and for others disabled [3]. Also it is discouraged for any processor starting from Haswell and Silvermont. Therefore this series converts the Intel microcode bundle to an initial ram disk which is loaded with grub, so kernel has access to it as early as possible. Previous patch series: https://patchwork.ozlabs.org/project/lede/list/?series=39372
1. https://lore.kernel.org/patchwork/cover/348236 2. https://lore.kernel.org/patchwork/cover/348236/#508603 3. https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=723f2828a98c8ca19842042f418fb30dd8cfc0f7 Changes in v4: - copy also hidden files: x86: add packages files to image bootfs - no changes: 1) include/rootfs.mk: remove boot directory 2) x86: mount writable bootfs 3) intel-microcode: remove dependency on iucode-tool 4) x86: add intel microcode entries to grub config 5) intel-microcode: create early load microcode image Change suggested by Philip Prindeville. Changes in v3: - replaced "include/rootfs.mk: move boot directory for later use" with "include/rootfs.mk: remove boot directory"; the final rootfs is always created after targets rootfs, so there's no need to save files for later use, also there was side effect to this approach, it kept the old files if packages version changed and buildroot wasn't cleaned beforehand - reflect the changes in "include/rootfs.mk: remove boot directory": x86: add packages files to image bootfs - expand commit message, narrow down the test in grub config: x86: add intel microcode entries to grub config - no changes: 1) x86: mount writable bootfs 2) intel-microcode: remove dependency on iucode-tool 3) intel-microcode: create early load microcode image Changes in v2: - three new commits allowing buildsystem to properly handle packages installing files to /boot directory, mainly for x86 target: 1) include/rootfs.mk: move boot directory for later use 2) x86: mount writable bootfs 3) x86: add packages files to image bootfs - uncomplicate test for AMD processors in: x86: add intel microcode entries to grub config - remove package specific hook in x86 image Makefile, remove postinst/prerm scripts and install microcode directly to /boot: intel-microcode: create early load microcode image - no changes: intel-microcode: remove dependency on iucode-tool All changes in v2 suggested by Matthias Schiffer and Philip Prindeville. Tomasz Maciej Nowak (6): include/rootfs.mk: remove boot directory x86: mount writable bootfs x86: add packages files to image bootfs intel-microcode: remove dependency on iucode-tool x86: add intel microcode entries to grub config intel-microcode: create early load microcode image include/rootfs.mk | 1 + package/firmware/intel-microcode/Makefile | 16 +++++++++------- .../x86/base-files/lib/preinit/02_load_x86_ucode | 6 ++++-- .../x86/base-files/lib/preinit/79_move_config | 12 ++++-------- target/linux/x86/image/Makefile | 6 ++++-- target/linux/x86/image/grub-iso.cfg | 3 +++ target/linux/x86/image/grub.cfg | 3 +++ 7 files changed, 28 insertions(+), 19 deletions(-) -- 2.19.1 _______________________________________________ openwrt-devel mailing list openwrt-devel@lists.openwrt.org https://lists.openwrt.org/mailman/listinfo/openwrt-devel
