linux.git/tools/verification, branch master

verification/rvgen: Remove unused variable declaration from containers

2026-01-12T06:43:51+00:00

The monitor container source files contained a declaration and a
definition for the rv_monitor variable. The former is superfluous and
can be removed.

Remove the variable declaration from the template as well as the
existing monitor containers.

Reviewed-by: Nam Cao 
Link: https://lore.kernel.org/r/20251126104241.291258-9-gmonaco@redhat.com
Signed-off-by: Gabriele Monaco

verification/dot2c: Remove superfluous enum assignment and add last comma

2026-01-12T06:43:50+00:00

The header files generated by dot2c currently create enums for states
and events assigning the first element to 0. This is superfluous as it
happens automatically if no value is specified.
Also it doesn't add a comma to the last enum elements, which slightly
complicates the diff if states or events are added.

Remove the assignment to 0 and add a comma to last elements, this
simplifies the logic for the code generator.

Reviewed-by: Nam Cao 
Link: https://lore.kernel.org/r/20251126104241.291258-8-gmonaco@redhat.com
Signed-off-by: Gabriele Monaco

verification/dot2c: Remove __buff_to_string() and cleanup

2026-01-12T06:43:50+00:00

str.join() can do what __buff_to_string() does. Therefore replace
__buff_to_string() to make the scripts more pythonic.

Also clean and remove some intermediate functions.

Reviewed-by: Nam Cao 
Link: https://lore.kernel.org/r/20251126104241.291258-7-gmonaco@redhat.com
Signed-off-by: Gabriele Monaco

verification/rvgen: Annotate DA functions with types

2026-01-12T06:43:50+00:00

Functions in automata.py, dot2c.py and dot2k.py don't have type
annotations and it can get complicated to remember how to use them.

Add minimal type annotations.

Reviewed-by: Nam Cao 
Link: https://lore.kernel.org/r/20251126104241.291258-6-gmonaco@redhat.com
Signed-off-by: Gabriele Monaco

verification/rvgen: Adapt dot2k and templates after refactoring da_monitor.h

2026-01-12T06:43:50+00:00

Previous changes refactored the da_monitor header file to avoid using
macros. This implies a few changes in how to import and use da_monitor
helpers:

 DECLARE_DA_MON_(name, type) is substituted by
 #define RV_MON_TYPE RV_MON_

Update the rvgen templates to reflect the changes.

Reviewed-by: Nam Cao 
Link: https://lore.kernel.org/r/20251126104241.291258-5-gmonaco@redhat.com
Signed-off-by: Gabriele Monaco

rv: Add opid per-cpu monitor

2025-07-28T20:47:35+00:00

Add a per-cpu monitor as part of the sched model:
* opid: operations with preemption and irq disabled
    Monitor to ensure wakeup and need_resched occur with irq and
    preemption disabled or in irq handlers.

Cc: Jonathan Corbet 
Cc: Masami Hiramatsu 
Cc: Ingo Molnar 
Cc: Peter Zijlstra 
Cc: Tomas Glozar 
Cc: Juri Lelli 
Cc: Clark Williams 
Cc: John Kacur 
Link: https://lore.kernel.org/20250728135022.255578-10-gmonaco@redhat.com
Signed-off-by: Gabriele Monaco 
Acked-by: Nam Cao 
Tested-by: Nam Cao 
Signed-off-by: Steven Rostedt (Google)

rv: Add nrp and sssw per-task monitors

2025-07-28T20:47:34+00:00

Add 2 per-task monitors as part of the sched model:

* nrp: need-resched preempts
    Monitor to ensure preemption requires need resched.
* sssw: set state sleep and wakeup
    Monitor to ensure sched_set_state to sleepable leads to sleeping and
    sleeping tasks require wakeup.

Cc: Ingo Molnar 
Cc: Jonathan Corbet 
Cc: Masami Hiramatsu 
Cc: Tomas Glozar 
Cc: Juri Lelli 
Cc: Clark Williams 
Cc: John Kacur 
Cc: Peter Zijlstra 
Link: https://lore.kernel.org/20250728135022.255578-9-gmonaco@redhat.com
Signed-off-by: Gabriele Monaco 
Acked-by: Nam Cao 
Tested-by: Nam Cao 
Signed-off-by: Steven Rostedt (Google)

rv: Replace tss and sncid monitors with more complete sts

2025-07-28T20:47:34+00:00

The tss monitor currently guarantees task switches can happen only while
scheduling, whereas the sncid monitor enforces scheduling occurs with
interrupt disabled.

Replace the monitors with a more comprehensive specification which
implies both but also ensures that:
* each scheduler call disable interrupts to switch
* each task switch happens with interrupts disabled

Cc: Ingo Molnar 
Cc: Jonathan Corbet 
Cc: Masami Hiramatsu 
Cc: Nam Cao 
Cc: Tomas Glozar 
Cc: Juri Lelli 
Cc: Clark Williams 
Cc: John Kacur 
Cc: Peter Zijlstra 
Link: https://lore.kernel.org/20250728135022.255578-8-gmonaco@redhat.com
Signed-off-by: Gabriele Monaco 
Signed-off-by: Steven Rostedt (Google)

rv: Return init error when registering monitors

2025-07-24T14:43:46+00:00

Monitors generated with dot2k have their registration function (the one
called during monitor initialisation) return always 0, even if the
registration failed on RV side.
This can hide potential errors.

Return the value returned by the RV register function.

Cc: Masami Hiramatsu 
Cc: Tomas Glozar 
Cc: Juri Lelli 
Cc: Clark Williams 
Cc: John Kacur 
Link: https://lore.kernel.org/20250723161240.194860-6-gmonaco@redhat.com
Reviewed-by: Nam Cao 
Signed-off-by: Gabriele Monaco 
Signed-off-by: Steven Rostedt (Google)

verification/rvgen: Organise Kconfig entries for nested monitors

2025-07-24T14:43:46+00:00

The current behaviour of rvgen when running with the -a option is to
append the necessary lines at the end of the configuration for Kconfig,
Makefile and tracepoints.
This is not always the desired behaviour in case of nested monitors:
while tracepoints are not affected by nesting and the Makefile's only
requirement is that the parent monitor is built before its children, in
the Kconfig it is better to have children defined right after their
parent, otherwise the result has wrong indentation:

[*]   foo_parent monitor
[*]     foo_child1 monitor
[*]     foo_child2 monitor
[*]   bar_parent monitor
[*]     bar_child1 monitor
[*]     bar_child2 monitor
[*]   foo_child3 monitor
[*]   foo_child4 monitor

Adapt rvgen to look for a different marker for nested monitors in the
Kconfig file and append the line right after the last sibling, instead
of the last monitor.
Also add the marker when creating a new parent monitor.

Cc: Masami Hiramatsu 
Cc: Tomas Glozar 
Cc: Juri Lelli 
Cc: Clark Williams 
Cc: John Kacur 
Link: https://lore.kernel.org/20250723161240.194860-5-gmonaco@redhat.com
Reviewed-by: Nam Cao 
Signed-off-by: Gabriele Monaco 
Signed-off-by: Steven Rostedt (Google)