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SubjectRe: [PATCH] perf, ibs: Check syscall attribute flags
On 07.09.12 10:50:35, David Ahern wrote:
> On 9/7/12 10:41 AM, Robert Richter wrote:
> > + struct perf_event_attr notsupp = {
> > + .exclude_user = 1,
> > + .exclude_kernel = 1,
> > + .exclude_hv = 1,
> > + .exclude_idle = 1,
> > + .exclude_host = 1,
> > + .exclude_guest = 1,
> > + };
> >
> > perf_ibs = get_ibs_pmu(event->attr.type);
> > if (perf_ibs) {
> > @@ -229,6 +237,9 @@ static int perf_ibs_init(struct perf_event *event)
> > if (event->pmu != &perf_ibs->pmu)
> > return -ENOENT;
> >
> > + if (perf_flags(&event->attr) & perf_flags(&notsupp))
> > + return -EINVAL;
> > +
>
> 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.

-Robert

--
Advanced Micro Devices, Inc.
Operating System Research Center



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