From: Doron Behar <doron.behar@gmail.com>
To: kernelnewbies@kernelnewbies.org
Subject: Re: What is the minimal set of firmware files I need for my hardware?
Date: Mon, 4 May 2020 15:56:40 +0300 [thread overview]
Message-ID: <20200504125640.zfwp72h4j3pqthul@NUX> (raw)
In-Reply-To: <20200504104555.GA1571331@kroah.com>
On Mon, May 04, 2020 at 12:45:55PM +0200, Greg KH wrote:
> On Mon, May 04, 2020 at 01:26:35PM +0300, Doron Behar wrote:
> > I hope this question fits to this List.
> >
> > Today I learned that my distro's `linux-unfree-firmware` package is 491
> > Mb in size. I'm pretty sure my hardware doesn't need all of these files.
> > Maybe different Linux distros call this package differently, but I'm talking
> > about the firmware files that come from:
> > https://git.kernel.org/pub/scm/linux/kernel/git/firmware/linux-firmware.git/
> >
> > I think I can reduce this disk usage if I'll only know what files
> > I can exclude from there.
> >
> > Is there any official documentation, that states exactly what files from
> > That git repo are needed per device / computer model? Perhaps the official
> > documentation of my Computer's hardware will state that? There's a Linux
> > from scratch webpage[1] that gives some info for popular hardware, but I'm
> > wondering if there's a bit more "official" information available
> > somewhere.
> >
> > [1]: http://linuxfromscratch.org/blfs/view/svn/postlfs/firmware.html
>
> The kernel macro MODULE_FIRMWARE() will show the firmware file that a
> specific kernel module needs. So if you look a the output of modinfo
> for all of the modules that your system needs, you will see a "firmware"
> line that shows the name that your hardware needs for that specific
> driver/module.
Thanks for replying greg,
So I have the command `modinfo` available, should I just iterate _all_
the files in /usr/lib/modules/5.6.7/kernel ? For example:
```
$ modinfo /usr/lib/modules/5.6.7/kernel/net/ieee802154/ieee802154.ko.xz
filename: /usr/lib/modules/5.6.7/kernel/net/ieee802154/ieee802154.ko.xz
author: Dmitry Eremin-Solenikov
description: IEEE 802.15.4 configuration interface
license: GPL v2
depends:
retpoline: Y
intree: Y
name: ieee802154
vermagic: 5.6.7 SMP mod_unload
sig_id: PKCS#7
signer:
sig_key:
sig_hashalgo: unknown
signature:
```
Doesn't seem informative regarding firmware files. Should I expect other
.ko.xz files to give a line with `firmware: `?
Plus, how do I know what modules does my system need and which it
doesn't?
Doron.
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next prev parent reply other threads:[~2020-05-04 12:59 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-05-04 10:26 What is the minimal set of firmware files I need for my hardware? Doron Behar
2020-05-04 10:45 ` Greg KH
2020-05-04 12:56 ` Doron Behar [this message]
2020-05-04 13:06 ` Greg KH
2020-05-04 15:20 ` Doron Behar
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