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<div class="moz-cite-prefix">On 18.11.2019 19:22, Wayne Li wrote:<br>
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cite="mid:CAM2K0nrK_LycaTR4N87+3j_LyWtKcSq4fLC5Ramq_MpvGsr1Fg@mail.gmail.com">
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<div>Dear Yocto Developers,</div>
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<div>I'm trying to incorporate KVM into a Yocto kernel me and my
coworker build for a T4240 RDB (which has a PowerPC CPU). The
problem is, no matter what I do the KVM kernel module (I'm
expecting a kvm.ko or any .ko file along those lines) is not
present in the image.</div>
<div><br>
</div>
<div>First I tried adding the content of the .config file
generated when configuring the kernel for KVM support into the
kernel configuration file. This resulted in KVM source
directories appearing in the kernel but no KVM related kernel
modules are present. I explain this in more detail in a
previous email conversation I had with the Yocto community
(saved in a Github gist for readability):</div>
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What is your kenel config? Is KVM built-in (y) or built as module
(m)?<br>
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cite="mid:CAM2K0nrK_LycaTR4N87+3j_LyWtKcSq4fLC5Ramq_MpvGsr1Fg@mail.gmail.com">
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<div><a
href="https://gist.github.com/WayneZhenLi/d5d7a5e8c30e6d4b7cd4541d0c24cab5"
target="_blank" moz-do-not-send="true">https://gist.github.com/WayneZhenLi/d5d7a5e8c30e6d4b7cd4541d0c24cab5</a></div>
<div><br>
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<div>Since then I've tried a few things. First, I added the
following lines to the local.conf file (found in
build_t4240rdb-64b/conf folder):</div>
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<div>
MACHINE_ESSENTIAL_EXTRA_RRECOMMENDS += "kernel-modules"<br>
MACHINE_ESSENTIAL_EXTRA_RRECOMMENDS += "kvm-image-minimal"
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I din't know which image you are building. Those variables are
tricky, since<br>
they only applies when basing on the packagegroup-core-boot
packagegroup.<br>
Please refer to the documentation.<br>
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<div>But that didn't seem to work as there weren't any new .ko
files in the final image. Next I tried adding the following
lines to the same local.conf file:</div>
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<div>
CORE_IMAGE_EXTRA_INSTALL += "kernel-modules"<br>
CORE_IMAGE_EXTRA_INSTALL += "kvm-image-minimal"</div>
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Why trying to install the image into image? kvm-image-minimal is not
a package, it is image recipe.<br>
The build can definitely break in this case.<br>
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cite="mid:CAM2K0nrK_LycaTR4N87+3j_LyWtKcSq4fLC5Ramq_MpvGsr1Fg@mail.gmail.com">
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<div>This time I get an error saying "ERROR: kvm-image-minimal
not found in the base feeds (t4240rdb-64b ppc64e6500 powerpc64
noarch any all)". Also if just run a "ERROR: bitbake
kvm-image-minimal" to see what's going on with that particular
recipe I get an error saying "kernel-module-kvm-intel" not
found in the base feeds (t4240rdb-64b ppc64e6500 powerpc64
noarch any all).</div>
<div><br>
</div>
<div>Would I have to write recipes for the packages listed in
kvm-image-minimal such as kernel-module-kvm-intel or
kernel-module-kvm? Note that I'm not even building the image
for intel; I'm building it for PowerPC. Anyway, I just feel
like writing recipes for the KVM kernel modules isn't the
correct step. Like maybe I just messed up my with my
configuration somehow? What are your thoughts?</div>
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IMHO: Simply use IMAGE_INSTALL += "kernel-modules" (IMAGE_INSTALL +=
"kernel-module-kvm" will likely install just the KVM module)<br>
in your local.conf to install all built kernel modules. If KVM
module won't be present in the rootfs, it means it was not built.<br>
<br>
Please inspect your kernel work dir (packages-split dir) to find out
which packages were produced by<br>
the kernel recipe. It will be something like
build/tmp/work/XX/linux-yocto/XX/packages-split<br>
<blockquote type="cite"
cite="mid:CAM2K0nrK_LycaTR4N87+3j_LyWtKcSq4fLC5Ramq_MpvGsr1Fg@mail.gmail.com">
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<div>-Thanks!, Wayne Li<br>
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<pre class="moz-signature" cols="72">--
Maciej Pijanowski
Embedded Systems Engineer
<a class="moz-txt-link-freetext" href="https://3mdeb.com">https://3mdeb.com</a> | @3mdeb_com</pre>
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