[libvirt PATCH] util: Fix getting CPU frequency on Apple Silicon

[Menci]

I tested the patch (applying to v7.10.0) and it works on my M1 MacBook Air.
Thanks.

On Sat, Feb 12, 2022 at 1:32 AM Andrea Bolognani <abologna at redhat.com>
wrote:

> On Thu, Feb 10, 2022 at 10:08:42AM +0100, Andrea Bolognani wrote:
> > +++ b/src/util/virhostcpu.c
> > @@ -928,8 +928,14 @@ virHostCPUGetInfo(virArch hostarch G_GNUC_UNUSED,
> >      *mhz = cpu_freq;
> >  # else
> >      if (sysctlbyname("hw.cpufrequency", &cpu_freq, &cpu_freq_len, NULL,
> 0) < 0) {
> > -        virReportSystemError(errno, "%s", _("cannot obtain CPU freq"));
> > -        return -1;
> > +        if (errno == ENOENT) {
> > +            /* The hw.cpufrequency sysctl is not implemented on Apple
> Silicon.
> > +             * In that case, we report 0 instead of erroring out */
> > +            cpu_freq = 0;
> > +        } else {
> > +            virReportSystemError(errno, "%s", _("cannot obtain CPU
> freq"));
> > +            return -1;
> > +        }
> >      }
>
> Menci, can you please confirm this works for you before I push? I
> have no way of verifying that on my own. Thanks!
>
> --
> Andrea Bolognani / Red Hat / Virtualization
>
>
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