Re: [PATCH v2] perf evsel amd: Fix IBS error message

[Ravi Bangoria]

On 26-Jun-23 4:09 PM, Ravi Bangoria wrote:
> AMD IBS can do per-process profiling[1] and is no longer restricted to
> per-cpu or systemwide only. Remove stale error message. Also, checking
> just exclude_kernel is not sufficient since IBS does not support any
> privilege filters. So include all exclude_* checks. And finally, move
> these checks under tools/perf/arch/x86/ from generic code.
> 
> Before:
>   $ sudo ./perf record -e ibs_op//k -C 0
>   Error:
>   AMD IBS may only be available in system-wide/per-cpu mode.  Try
>   using -a, or -C and workload affinity
> 
> After:
>   $ sudo ./perf record -e ibs_op//k -C 0
>   Error:
>   AMD IBS doesn't support privilege filtering. Try again with
>   exclude_{kernel|user|hv|idle|host|guest}=0.

[1] https://git.kernel.org/torvalds/c/30093056f7b2