On Thu, Feb 22, 2018 at 12:38:39PM -0800, Saravana Kannan wrote: > On 02/22/2018 03:33 AM, Mark Rutland wrote: > > On Wed, Feb 21, 2018 at 06:32:46PM -0800, Saravana Kannan wrote: > > > I'm not exactly sure if we can add entries to perf_type_id. If that's > > > allowed maybe we need to add something line PERF_TYPE_DSU and use that? > > > > > > Or if that's not allowed then would it be better to offset the DSU PMU > > > events by some number (say 0x1000) and then delete the event type check or > > > pass PERF_TYPE_RAW to perf_pmu_register()? > > > > As above, neither of these should be necessary. > > For the userspace interface. How about the kernel interface though? > perf_event_create_kernel_counter() takes attr.type as an input. But there's > no way to look up the DSU PMU's "type".
There is no lookup mechanism currently. I take it you want to use DSU events from a kernel module? It would be possible to have a simlar name -> type lookup mechanism kernel-side, if necessary. Thanks, Mark.