On Wed, Jul 13, 2022 at 11:17:22PM +0200, Daniel Bristot de Oliveira wrote: > Add the runtime-verification.rst document, explaining the basics of RV > and how to use the interface. > > Cc: Wim Van Sebroeck <wim@xxxxxxxxxxxxxxxxxx> > Cc: Guenter Roeck <linux@xxxxxxxxxxxx> > Cc: Jonathan Corbet <corbet@xxxxxxx> > Cc: Steven Rostedt <rostedt@xxxxxxxxxxx> > Cc: Ingo Molnar <mingo@xxxxxxxxxx> > Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx> > Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx> > Cc: Will Deacon <will@xxxxxxxxxx> > Cc: Catalin Marinas <catalin.marinas@xxxxxxx> > Cc: Marco Elver <elver@xxxxxxxxxx> > Cc: Dmitry Vyukov <dvyukov@xxxxxxxxxx> > Cc: "Paul E. McKenney" <paulmck@xxxxxxxxxx> > Cc: Shuah Khan <skhan@xxxxxxxxxxxxxxxxxxx> > Cc: Gabriele Paoloni <gpaoloni@xxxxxxxxxx> > Cc: Juri Lelli <juri.lelli@xxxxxxxxxx> > Cc: Clark Williams <williams@xxxxxxxxxx> > Cc: Tao Zhou <tao.zhou@xxxxxxxxx> > Cc: Randy Dunlap <rdunlap@xxxxxxxxxxxxx> > Cc: linux-doc@xxxxxxxxxxxxxxx > Cc: linux-kernel@xxxxxxxxxxxxxxx > Cc: linux-trace-devel@xxxxxxxxxxxxxxx > Signed-off-by: Daniel Bristot de Oliveira <bristot@xxxxxxxxxx> > --- > Documentation/trace/index.rst | 1 + > Documentation/trace/rv/index.rst | 9 + > .../trace/rv/runtime-verification.rst | 233 ++++++++++++++++++ > kernel/trace/rv/Kconfig | 3 + > kernel/trace/rv/rv.c | 3 + > 5 files changed, 249 insertions(+) > create mode 100644 Documentation/trace/rv/index.rst > create mode 100644 Documentation/trace/rv/runtime-verification.rst > + runtime-verification.rst [snip] > +The user interface > +================== > + > +The user interface resembles the tracing interface (on purpose). It is > +currently at "/sys/kernel/tracing/rv/". > + > +The following files/folders are currently available: > + > +**available_monitors** > + > +- Reading list the available monitors, one per line > + > +For example:: > + > + # cat available_monitors > + wip > + wwnr > + > +**available_reactors** > + > +- Reading shows the available reactors, one per line. > + > +For example:: > + > + # cat available_reactors > + nop > + panic > + printk > + > +**enabled_monitors**: > + > +- Reading lists the enabled monitors, one per line > +- Writing to it enables a given monitor > +- Writing a monitor name with a '-' prefix disables it s/-/!/ > +- Truncating the file disables all enabled monitors > + > +For example:: > + > + # cat enabled_monitors > + # echo wip > enabled_monitors > + # echo wwnr >> enabled_monitors > + # cat enabled_monitors > + wip > + wwnr > + # echo '!wip' >> enabled_monitors > + # cat enabled_monitors > + wwnr > + # echo > enabled_monitors > + # cat enabled_monitors > + # > + > +Note that it is possible to enable more than one monitor concurrently. > + > + > +**monitoring_on** > + > +This is an on/off general switcher for monitoring. It resembles the > +"tracing_on" switcher in the trace interface. > + > +- Writing "0" stops the monitoring > +- Writing "1" continues the monitoring > +- Reading returns the current status of the monitoring > + > +Note that it does not disable enabled monitors but stop the per-entity > +monitors monitoring the events received from the system. > + > +**reacting_on** > + > +- Writing "0" prevents reactions for happening > +- Writing "1" enable reactions > +- Reading returns the current status of the monitoring s/monitoring/reaction/
|