Re: [PATCH 2/3] perf_counter: allow arch to supply event miscflags and instruction pointer

[Paul Mackerras]

Peter Zijlstra writes:

> On Thu, 2009-05-14 at 13:29 +1000, Paul Mackerras wrote:

> >  #define PERF_EVENT_MISC_KERNEL		(1 << 0)
> >  #define PERF_EVENT_MISC_USER		(1 << 1)
> >  #define PERF_EVENT_MISC_OVERFLOW	(1 << 2)
> > +#define PERF_EVENT_MISC_HYPERVISOR	(1 << 3)
> 
> Ah, I think I've taught userspace that either !USER && !KERNEL or USER
> && KERNEL is HV information, since neither really makes sense :-)

OK, should we do something like this?

#define PERF_EVENT_MISC_CPUMODE_MASK	(3 << 0)
#define PERF_EVENT_MISC_CPUMODE_UNKNOWN	(0 << 0)
#define PERF_EVENT_MISC_USER		(1 << 0)
#define PERF_EVENT_MISC_KERNEL		(2 << 0)
#define PERF_EVENT_MISC_HYPERVISOR	(3 << 0)

Paul.
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