perf-security: document collected perf_events/Perf data categories

Document and categorize system and performance data into groups that
can be captured by perf_events/Perf and explicitly indicate the group
that can contain process sensitive data.

Signed-off-by: Alexey Budankov <[email protected]>
Signed-off-by: Jonathan Corbet <[email protected]>
1 file changed