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perf, core: Introduce attrs to count in either host or guest mode 

The two new attributes exclude_guest and exclude_host can
bes used by user-space to tell the kernel to setup
performance counter to either only count while the CPU is in
guest or in host mode.

An additional check is also introduced to make sure
user-space does not try to exclude guest and host mode from
counting.

Signed-off-by: Joerg Roedel <joerg.roedel@amd.com>
Signed-off-by: Gleb Natapov <gleb@redhat.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1317816084-18026-2-git-send-email-gleb@redhat.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Joerg Roedel 2011-10-05 14:01:16 +02:00 committed by Ingo Molnar
parent 7b4f86ac05
commit a240f76165
1 changed files with 4 additions and 1 deletions
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5
include/linux/perf_event.h
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@ -220,7 +220,10 @@ struct perf_event_attr {
mmap_data : 1, /* non-exec mmap data */
sample_id_all : 1, /* sample_type all events */
__reserved_1 : 45;
exclude_host : 1, /* don't count in host */
exclude_guest : 1, /* don't count in guest */
__reserved_1 : 43;
union {
__u32 wakeup_events; /* wakeup every n events */