Re: [RFC] perf/x86/intel: Disable check_msr for real hw

[Jiri Olsa]

On Mon, Jun 24, 2019 at 11:38:06AM -0700, Andi Kleen wrote:
> > Tom, plz correctme if I'm wrongm but AFAIK because the LBR tracing is
> > enabled during the boot the lbr_from/lbr_to registers will fail the
> > check_msr 'val_new != val_tmp' check
> 
> Ok this should be handleable. It should be enough to check
> the ctrl register, if that working likely we don't need
> to check the data registers which might be changing.

if the control register check is enough, we should be ok then,
I'll send new version

thanks,
jirka