Re: [PATCH] perf, ibs: Check syscall attribute flags

[David Ahern]

On 9/7/12 11:07 AM, Robert Richter wrote:
> > Am I reading this right - if exclude_guest is set then perf_ibs_init
> > returns -EINVAL?
>
> Yes, the hardware does not support this. I will look for a solution
> which emulates this is software.

ugh, that's exactly we need for Intel: if precise is set, exclude_guest 
must be set.

In perf I would like to set exclude_guest if precise is set -- what I 
mentioned yesterday for the patch https://lkml.org/lkml/2012/7/20/437. 
With my patch -e cycles:p on AMD will then fail EINVAL.

David


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