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cross-ng: mention in-kernel firmware blob for temporary kernel

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Xi Ruoyao 2021-12-17 22:22:41 +08:00
parent 4f2d91dc65
commit 9673470766
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chapter06/kernel.xml
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@ -130,6 +130,43 @@
</listitem>
</varlistentry>
<varlistentry>
<term>Set <parameter>CONFIG_EXTRA_FIRMWARE="<replaceable>a.bin b.bin</replaceable>"</parameter></term>
<listitem>
<para>Build firmware blobs into the kernel. Some drivers may
require the firmwares to be in-kernel if the driver is not built
as module.</para>
<note>
<para>
The kernel binaries with third-party blobs are not
distributable. If you distribute such a kernel binary to
others, you may violate GPL. It's recommended to remove the
temporary kernel image after you've successfully boot your LFS
system with the new kernel image, which will be installed in
<xref linkend="ch-bootable-kernel"/>.
</para>
</note>
</listitem>
</varlistentry>
<varlistentry>
<term>Set <parameter>CONFIG_EXTRA_FIRMWARE_DIR="<replaceable>$LFS</replaceable>/lib/firmware"</parameter></term>
<listitem>
<para>The building system will search
<filename class="directory">/lib/firmware</filename> for firmware
blobs in <parameter>CONFIG_EXTRA_FIRMWARE</parameter>. Note that
you'll need to install the needed firmwares into
<filename class="directory">$LFS/lib/firmware</filename> first,
and manually replace <envar>$LFS</envar> with the value in
configuration. The firmwares in
<filename class="directory">$LFS/lib/filename</filename> will be
copied to the target machine along with the system, so kernel and
kernel modules which will be built in
<xref linkend="ch-bootable-kernel"/> can load them without
<parameter>CONFIG_EXTRA_FIRMWARE</parameter>.</para>
</listitem>
</varlistentry>
<varlistentry>
<term>Enable <parameter>CONFIG_EXT2</parameter>,
<parameter>CONFIG_EXT4</parameter>,