[arch-releng] [PATCH 1/1] concatenate initramfs images for early microcode update

[Gerardo Exequiel Pozzi]

On 10/29/2014 11:56 AM, Christian Hesse wrote:
> Gerardo Exequiel Pozzi <vmlinuz386 at gmail.com> on Wed, 2014/10/29 11:35:
>> On 10/29/2014 11:02 AM, list at eworm.de wrote:
>>> From: Christian Hesse <mail at eworm.de>
>>>
>>> https://www.kernel.org/doc/Documentation/x86/early-microcode.txt
>>> ---
>>>  configs/releng/build.sh | 2 +-
>>>  1 file changed, 1 insertion(+), 1 deletion(-)
>>>
>>> diff --git a/configs/releng/build.sh b/configs/releng/build.sh
>>> index 07ff911..8b6beee 100755
>>> --- a/configs/releng/build.sh
>>> +++ b/configs/releng/build.sh
>>> @@ -90,7 +90,7 @@ make_customize_airootfs() {
>>>  # Prepare kernel/initramfs ${install_dir}/boot/
>>>  make_boot() {
>>>      mkdir -p ${work_dir}/iso/${install_dir}/boot/${arch}
>>> -    cp ${work_dir}/${arch}/airootfs/boot/archiso.img
>>> ${work_dir}/iso/${install_dir}/boot/${arch}/archiso.img
>>> +    cat ${work_dir}/${arch}/airootfs/boot/intel-ucode.img
>>> ${work_dir}/${arch}/airootfs/boot/archiso.img >
>>> ${work_dir}/iso/${install_dir}/boot/${arch}/archiso.img
>>
>> This does not look good. archiso.img is compressed, while
>> intel-ucode.img is uncompressed.
> 
> Both of these are cpio archives. So what's wrong?
> 
> # file initramfs-linux.img intel-ucode.img 
> initramfs-linux.img: ASCII cpio archive (SVR4 with no CRC)
> intel-ucode.img:     ASCII cpio archive (SVR4 with no CRC)

Looks like you are you working with uncompressed initcpio images (ie you
made a change to the default mkinitcpio.conf provided by archiso.)


If prefer this way:

--- archiso_intel_ucode ---
#!/bin/bash

build() {
    cd /tmp
    bsdcpio -i -d < /boot/intel-ucode.bin
    add_file /tmp/kernel/x86/microcode/GenuineIntel.bin
/kernel/x86/microcode/GenuineIntel.bin
}

help() {
    cat <<HELPEOF
This hook adds intel microcode updates to the early boot stage.
HELPEOF
}

# vim: set ft=sh ts=4 sw=4 et:
----------------------------


>  
>>>      cp ${work_dir}/${arch}/airootfs/boot/vmlinuz-linux
>>> ${work_dir}/iso/${install_dir}/boot/${arch}/vmlinuz }


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