Re: ept and unrestricted_guest CPU features

[Vitaly Shevtsov <shev.vt1984%gmail.com@localhost>]

Thanks, RVP

Yup, it looks like x86_features[8] is not being read. This makes sense
why I don't see these features. I hope at least nvmm doesn't rely on
/proc

On Sun, Jan 12, 2025 at 3:28 AM RVP <rvp%sdf.org@localhost> wrote:
>
> On Fri, 10 Jan 2025, Vitaly Shevtsov wrote:
>
> > When I do "cat /proc/cpuinfo" in Linux, it shows that my CPU has ept,
> > unrestricted_guest, vpid flags along with vmx extension.
> > When I do the same in NetBSD, it shows that only vmx is supported. Is
> > it expected because of procfs implementation or doesn't NetBSD
> > recognise them?  And how does it affect VMs under NVMM?
> >
>
> Doesn't look like the VMX MSRs are being read and decoded. Only the stuff
> from CPUID is shown[1]--even with cpuctl[2].
>
> [1]: https://github.com/NetBSD/src/blob/trunk/sys/arch/x86/x86/procfs_machdep.c
> [2]: https://github.com/NetBSD/src/tree/trunk/usr.sbin/cpuctl
>
> -RVP