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Re: [PATCH v5 05/12] libs/guest: allow fetching a specific MSR entry from a cpu policy


  • To: Jan Beulich <jbeulich@xxxxxxxx>
  • From: Roger Pau Monné <roger.pau@xxxxxxxxxx>
  • Date: Tue, 11 Jan 2022 12:45:49 +0100
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  • Cc: Ian Jackson <iwj@xxxxxxxxxxxxxx>, Wei Liu <wl@xxxxxxx>, Juergen Gross <jgross@xxxxxxxx>, <xen-devel@xxxxxxxxxxxxxxxxxxxx>
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  • List-id: Xen developer discussion <xen-devel.lists.xenproject.org>

On Mon, Dec 06, 2021 at 04:27:25PM +0100, Jan Beulich wrote:
> On 29.11.2021 16:33, Roger Pau Monne wrote:
> > --- a/tools/libs/guest/xg_cpuid_x86.c
> > +++ b/tools/libs/guest/xg_cpuid_x86.c
> > @@ -878,6 +878,26 @@ int xc_cpu_policy_get_cpuid(xc_interface *xch, const 
> > xc_cpu_policy_t *policy,
> >      return 0;
> >  }
> >  
> > +int xc_cpu_policy_get_msr(xc_interface *xch, const xc_cpu_policy_t *policy,
> > +                          uint32_t msr, xen_msr_entry_t *out)
> > +{
> > +    const uint64_t *val;
> > +
> > +    *out = (xen_msr_entry_t){};
> 
> Unless there's a specific reason for the divergence, this just-in-
> case initialization should imo be consistently there (or absent)
> in both the MSR and the CPUID function.

Right - will add the initialization to the CPUID function.

Thanks, Roger.



 


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