On 9/4/25 17:00, Hector Cao wrote:
On Thu, Sep 4, 2025 at 11:40 PM Jim Fehlig <jfehlig@xxxxxxxx
<mailto:jfehlig@xxxxxxxx>> wrote:
On 9/3/25 06:49, Hector Cao wrote:
> On recent Intel CPUs, some of the CPU features (mostly
> vmx-* subfeatures) are listed and controlled via the
> MSRs (Model Specific Registers) instead of the traditional
> CPUID instruction method.
>
> To be able to read the MSR's values, the kernel module msr
> has to be loaded and the values can be read via /dev/cpu/*/msr.
>
> This commit introduces following changes:
>
> - install modules-load file for msr
> this is only enabled:
> - On x86 arch
> - If user asks for it explicitly via a build option:
> meson -Dmsr_module_load=true build
> By default, it is disabled.
Thanks for the build option, and having it disabled by default! Some distros or
distro flavors may not want this functionality.
Hello Jim,
Thanks for the feedback,
I realized that the commit description is wrong wrt to the actual code, my bad.
Heh, I totally missed that. I'd much prefer if the code matched the original
description :-).
I propose the let the discussions continue in this thread to gather all the
feedbacks but ultimately I will need to submit a v2
So here is the updated commit message:
This commit introduces following changes:
- install modules-load file for msr
this is only enabled:
- On x86 arch
- the file installation is enabled by default, it can be disabled via a
build option:
meson -Dmsr_module_load=false build
Let's hear what others say, but my vote is to have it disabled by default.
Regards,
Jim
