@@ -7,6 +7,8 @@
#ifndef _LINUX_RV_H
#define _LINUX_RV_H
+#define MAX_DA_NAME_LEN 24
+
struct rv_reactor {
char *name;
char *description;
new file mode 100644
@@ -0,0 +1,507 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2019-2022 Red Hat, Inc. Daniel Bristot de Oliveira <bristot@kernel.org>
+ *
+ * Deterministic automata (DA) monitor functions, to be used together
+ * with automata models in C generated by the dot2k tool.
+ *
+ * The dot2k tool is available at tools/verification/dot2k/
+ */
+
+#include <rv/automata.h>
+#include <linux/rv.h>
+#include <linux/bug.h>
+
+/*
+ * Generic helpers for all types of deterministic automata monitors.
+ */
+#define DECLARE_DA_MON_GENERIC_HELPERS(name, type) \
+ \
+static char REACT_MSG[1024]; \
+ \
+static inline char *format_react_msg(type curr_state, type event) \
+{ \
+ snprintf(REACT_MSG, 1024, \
+ "rv: monitor %s does not allow event %s on state %s\n", \
+ #name, \
+ model_get_event_name_##name(event), \
+ model_get_state_name_##name(curr_state)); \
+ return REACT_MSG; \
+} \
+ \
+static void cond_react(char *msg) \
+{ \
+ if (rv_##name.react) \
+ rv_##name.react(msg); \
+} \
+ \
+/* \
+ * da_monitor_reset_##name - reset a monitor and setting it to init state \
+ */ \
+static inline void da_monitor_reset_##name(struct da_monitor *da_mon) \
+{ \
+ da_mon->monitoring = 0; \
+ da_mon->curr_state = model_get_initial_state_##name(); \
+} \
+ \
+/* \
+ * da_monitor_curr_state_##name - return the current state \
+ */ \
+static inline type da_monitor_curr_state_##name(struct da_monitor *da_mon) \
+{ \
+ return da_mon->curr_state; \
+} \
+ \
+/* \
+ * da_monitor_set_state_##name - set the new current state \
+ */ \
+static inline void \
+da_monitor_set_state_##name(struct da_monitor *da_mon, enum states_##name state) \
+{ \
+ da_mon->curr_state = state; \
+} \
+ \
+/* \
+ * da_monitor_start_##name - start monitoring \
+ * \
+ * The monitor will ignore all events until monitoring is set to true. This \
+ * function needs to be called to tell the monitor to start monitoring. \
+ */ \
+static inline void da_monitor_start_##name(struct da_monitor *da_mon) \
+{ \
+ da_mon->monitoring = 1; \
+} \
+ \
+/* \
+ * da_monitoring_##name - returns true if the monitor is processing events \
+ */ \
+static inline bool da_monitoring_##name(struct da_monitor *da_mon) \
+{ \
+ return da_mon->monitoring; \
+} \
+ \
+/* \
+ * da_monitor_enabled_##name - checks if the monitor is enabled \
+ */ \
+static inline bool da_monitor_enabled_##name(void) \
+{ \
+ /* global switch */ \
+ if (unlikely(!rv_monitoring_on())) \
+ return 0; \
+ \
+ /* monitor enabled */ \
+ if (unlikely(!rv_##name.enabled)) \
+ return 0; \
+ \
+ return 1; \
+} \
+ \
+/* \
+ * da_monitor_handling_event_##name - checks if the monitor is ready to handle events \
+ */ \
+static inline bool da_monitor_handling_event_##name(struct da_monitor *da_mon) \
+{ \
+ \
+ if (!da_monitor_enabled_##name()) \
+ return 0; \
+ \
+ /* monitor is actually monitoring */ \
+ if (unlikely(!da_monitoring_##name(da_mon))) \
+ return 0; \
+ \
+ return 1; \
+}
+
+/*
+ * Event handler for implicit monitors. Implicit monitor is the one which the
+ * handler does not need to specify which da_monitor to manipulate. Examples
+ * of implicit monitor are the per_cpu or the global ones.
+ */
+#define DECLARE_DA_MON_MODEL_HANDLER_IMPLICIT(name, type) \
+ \
+static inline bool \
+da_event_##name(struct da_monitor *da_mon, enum events_##name event) \
+{ \
+ type curr_state = da_monitor_curr_state_##name(da_mon); \
+ type next_state = model_get_next_state_##name(curr_state, event); \
+ \
+ if (next_state != INVALID_STATE) { \
+ da_monitor_set_state_##name(da_mon, next_state); \
+ \
+ trace_event_##name(model_get_state_name_##name(curr_state), \
+ model_get_event_name_##name(event), \
+ model_get_state_name_##name(next_state), \
+ model_is_final_state_##name(next_state)); \
+ \
+ return true; \
+ } \
+ \
+ if (rv_reacting_on()) \
+ cond_react(format_react_msg(curr_state, event)); \
+ \
+ trace_error_##name(model_get_state_name_##name(curr_state), \
+ model_get_event_name_##name(event)); \
+ \
+ return false; \
+} \
+
+/*
+ * Event handler for per_task monitors.
+ */
+#define DECLARE_DA_MON_MODEL_HANDLER_PER_TASK(name, type) \
+ \
+static inline type da_event_##name(struct da_monitor *da_mon, struct task_struct *tsk, \
+ enum events_##name event) \
+{ \
+ type curr_state = da_monitor_curr_state_##name(da_mon); \
+ type next_state = model_get_next_state_##name(curr_state, event); \
+ \
+ if (next_state != INVALID_STATE) { \
+ da_monitor_set_state_##name(da_mon, next_state); \
+ \
+ trace_event_##name(tsk->pid, \
+ model_get_state_name_##name(curr_state), \
+ model_get_event_name_##name(event), \
+ model_get_state_name_##name(next_state), \
+ model_is_final_state_##name(next_state)); \
+ \
+ return true; \
+ } \
+ \
+ if (rv_reacting_on()) \
+ cond_react(format_react_msg(curr_state, event)); \
+ \
+ trace_error_##name(tsk->pid, \
+ model_get_state_name_##name(curr_state), \
+ model_get_event_name_##name(event)); \
+ \
+ return false; \
+}
+
+/*
+ * Functions to define, init and get a global monitor.
+ */
+#define DECLARE_DA_MON_INIT_GLOBAL(name, type) \
+ \
+/* \
+ * global monitor (a single variable) \
+ */ \
+static struct da_monitor da_mon_##name; \
+ \
+/* \
+ * da_get_monitor_##name - return the global monitor address \
+ */ \
+static struct da_monitor *da_get_monitor_##name(void) \
+{ \
+ return &da_mon_##name; \
+} \
+ \
+/* \
+ * da_monitor_reset_all_##name - reset the single monitor \
+ */ \
+static void da_monitor_reset_all_##name(void) \
+{ \
+ da_monitor_reset_##name(da_get_monitor_##name()); \
+} \
+ \
+/* \
+ * da_monitor_init_##name - initialize a monitor \
+ */ \
+static inline int da_monitor_init_##name(void) \
+{ \
+ da_monitor_reset_all_##name(); \
+ return 0; \
+} \
+ \
+/* \
+ * da_monitor_destroy_##name - destroy the monitor \
+ */ \
+static inline void da_monitor_destroy_##name(void) \
+{ \
+ return; \
+}
+
+/*
+ * Functions to define, init and get a per-cpu monitor.
+ */
+#define DECLARE_DA_MON_INIT_PER_CPU(name, type) \
+ \
+/* \
+ * per-cpu monitor variables \
+ */ \
+DEFINE_PER_CPU(struct da_monitor, da_mon_##name); \
+ \
+/* \
+ * da_get_monitor_##name - return current CPU monitor address \
+ */ \
+static struct da_monitor *da_get_monitor_##name(void) \
+{ \
+ return this_cpu_ptr(&da_mon_##name); \
+} \
+ \
+/* \
+ * da_monitor_reset_all_##name - reset all CPUs' monitor \
+ */ \
+static void da_monitor_reset_all_##name(void) \
+{ \
+ struct da_monitor *da_mon; \
+ int cpu; \
+ for_each_cpu(cpu, cpu_online_mask) { \
+ da_mon = per_cpu_ptr(&da_mon_##name, cpu); \
+ da_monitor_reset_##name(da_mon); \
+ } \
+} \
+ \
+/* \
+ * da_monitor_init_##name - initialize all CPUs' monitor \
+ */ \
+static inline int da_monitor_init_##name(void) \
+{ \
+ da_monitor_reset_all_##name(); \
+ return 0; \
+} \
+ \
+/* \
+ * da_monitor_destroy_##name - destroy the monitor \
+ */ \
+static inline void da_monitor_destroy_##name(void) \
+{ \
+ return; \
+}
+
+/*
+ * Functions to define, init and get a per-task monitor.
+ */
+#define DECLARE_DA_MON_INIT_PER_TASK(name, type) \
+ \
+/* \
+ * The per-task monitor is stored a vector in the task struct. This variable \
+ * stores the position on the vector reserved for this monitor. \
+ */ \
+static int task_mon_slot_##name = RV_PER_TASK_MONITOR_INIT; \
+ \
+/* \
+ * da_get_monitor_##name - return the monitor in the allocated slot for tsk \
+ */ \
+static inline struct da_monitor *da_get_monitor_##name(struct task_struct *tsk) \
+{ \
+ return &tsk->rv[task_mon_slot_##name].da_mon; \
+} \
+ \
+static void da_monitor_reset_all_##name(void) \
+{ \
+ struct task_struct *g, *p; \
+ \
+ read_lock(&tasklist_lock); \
+ for_each_process_thread(g, p) \
+ da_monitor_reset_##name(da_get_monitor_##name(p)); \
+ read_unlock(&tasklist_lock); \
+} \
+ \
+/* \
+ * da_monitor_init_##name - initialize the per-task monitor \
+ * \
+ * Try to allocate a slot in the task's vector of monitors. If there \
+ * is an available slot, use it and reset all task's monitor. \
+ */ \
+static int da_monitor_init_##name(void) \
+{ \
+ int slot; \
+ \
+ slot = get_task_monitor_slot(); \
+ if (slot < 0 || slot >= RV_PER_TASK_MONITOR_INIT) \
+ return slot; \
+ \
+ task_mon_slot_##name = slot; \
+ \
+ da_monitor_reset_all_##name(); \
+ return 0; \
+} \
+ \
+/* \
+ * da_monitor_destroy_##name - return the allocated slot \
+ */ \
+static inline void da_monitor_destroy_##name(void) \
+{ \
+ if (task_mon_slot_##name == RV_PER_TASK_MONITOR_INIT) { \
+ WARN_ONCE(1, "Disabling a disabled monitor: " #name); \
+ return; \
+ } \
+ put_task_monitor_slot(task_mon_slot_##name); \
+ task_mon_slot_##name = RV_PER_TASK_MONITOR_INIT; \
+ return; \
+}
+
+/*
+ * Handle event for implicit monitor: da_get_monitor_##name() will figure out
+ * the monitor.
+ */
+#define DECLARE_DA_MON_MONITOR_HANDLER_IMPLICIT(name, type) \
+ \
+static inline void __da_handle_event_##name(struct da_monitor *da_mon, \
+ enum events_##name event) \
+{ \
+ int retval; \
+ \
+ retval = da_monitor_handling_event_##name(da_mon); \
+ if (!retval) \
+ return; \
+ \
+ retval = da_event_##name(da_mon, event); \
+ if (!retval) \
+ da_monitor_reset_##name(da_mon); \
+} \
+ \
+/* \
+ * da_handle_event_##name - handle an event \
+ */ \
+static inline void da_handle_event_##name(enum events_##name event) \
+{ \
+ struct da_monitor *da_mon = da_get_monitor_##name(); \
+ __da_handle_event_##name(da_mon, event); \
+} \
+ \
+/* \
+ * da_handle_start_event_##name - start monitoring or handle event \
+ * \
+ * This function is used notify the monitor that the system is returning \
+ * to the initial state, so the monitor can start monitoring in the next event. \
+ * Thus: \
+ * \
+ * If the monitor already started, handle the event. \
+ * If the monitor did not start yet, start the monitor but skip the event. \
+ */ \
+static inline bool da_handle_start_event_##name(enum events_##name event) \
+{ \
+ struct da_monitor *da_mon; \
+ \
+ if (!da_monitor_enabled_##name()) \
+ return 0; \
+ \
+ da_mon = da_get_monitor_##name(); \
+ \
+ if (unlikely(!da_monitoring_##name(da_mon))) { \
+ da_monitor_start_##name(da_mon); \
+ return 0; \
+ } \
+ \
+ __da_handle_event_##name(da_mon, event); \
+ \
+ return 1; \
+} \
+ \
+/* \
+ * da_handle_start_run_event_##name - start monitoring and handle event \
+ * \
+ * This function is used notify the monitor that the system is in the \
+ * initial state, so the monitor can start monitoring and handling event. \
+ */ \
+static inline bool da_handle_start_run_event_##name(enum events_##name event) \
+{ \
+ struct da_monitor *da_mon; \
+ \
+ if (!da_monitor_enabled_##name()) \
+ return 0; \
+ \
+ da_mon = da_get_monitor_##name(); \
+ \
+ if (unlikely(!da_monitoring_##name(da_mon))) \
+ da_monitor_start_##name(da_mon); \
+ \
+ __da_handle_event_##name(da_mon, event); \
+ \
+ return 1; \
+}
+
+/*
+ * Handle event for per task.
+ */
+#define DECLARE_DA_MON_MONITOR_HANDLER_PER_TASK(name, type) \
+ \
+static inline void \
+__da_handle_event_##name(struct da_monitor *da_mon, struct task_struct *tsk, \
+ enum events_##name event) \
+{ \
+ int retval; \
+ \
+ retval = da_monitor_handling_event_##name(da_mon); \
+ if (!retval) \
+ return; \
+ \
+ retval = da_event_##name(da_mon, tsk, event); \
+ if (!retval) \
+ da_monitor_reset_##name(da_mon); \
+} \
+ \
+/* \
+ * da_handle_event_##name - handle an event \
+ */ \
+static inline void \
+da_handle_event_##name(struct task_struct *tsk, enum events_##name event) \
+{ \
+ struct da_monitor *da_mon = da_get_monitor_##name(tsk); \
+ __da_handle_event_##name(da_mon, tsk, event); \
+} \
+ \
+/* \
+ * da_handle_start_event_##name - start monitoring or handle event \
+ * \
+ * This function is used notify the monitor that the system is returning \
+ * to the initial state, so the monitor can start monitoring in the next event. \
+ * Thus: \
+ * \
+ * If the monitor already started, handle the event. \
+ * If the monitor did not start yet, start the monitor but skip the event. \
+ */ \
+static inline bool \
+da_handle_start_event_##name(struct task_struct *tsk, enum events_##name event) \
+{ \
+ struct da_monitor *da_mon; \
+ \
+ if (!da_monitor_enabled_##name()) \
+ return 0; \
+ \
+ da_mon = da_get_monitor_##name(tsk); \
+ \
+ if (unlikely(!da_monitoring_##name(da_mon))) { \
+ da_monitor_start_##name(da_mon); \
+ return 0; \
+ } \
+ \
+ __da_handle_event_##name(da_mon, tsk, event); \
+ \
+ return 1; \
+}
+
+/*
+ * Entry point for the global monitor.
+ */
+#define DECLARE_DA_MON_GLOBAL(name, type) \
+ \
+DECLARE_AUTOMATA_HELPERS(name, type) \
+DECLARE_DA_MON_GENERIC_HELPERS(name, type) \
+DECLARE_DA_MON_MODEL_HANDLER_IMPLICIT(name, type) \
+DECLARE_DA_MON_INIT_GLOBAL(name, type) \
+DECLARE_DA_MON_MONITOR_HANDLER_IMPLICIT(name, type)
+
+/*
+ * Entry point for the per-cpu monitor.
+ */
+#define DECLARE_DA_MON_PER_CPU(name, type) \
+ \
+DECLARE_AUTOMATA_HELPERS(name, type) \
+DECLARE_DA_MON_GENERIC_HELPERS(name, type) \
+DECLARE_DA_MON_MODEL_HANDLER_IMPLICIT(name, type) \
+DECLARE_DA_MON_INIT_PER_CPU(name, type) \
+DECLARE_DA_MON_MONITOR_HANDLER_IMPLICIT(name, type)
+
+/*
+ * Entry point for the per-task monitor.
+ */
+#define DECLARE_DA_MON_PER_TASK(name, type) \
+ \
+DECLARE_AUTOMATA_HELPERS(name, type) \
+DECLARE_DA_MON_GENERIC_HELPERS(name, type) \
+DECLARE_DA_MON_MODEL_HANDLER_PER_TASK(name, type) \
+DECLARE_DA_MON_INIT_PER_TASK(name, type) \
+DECLARE_DA_MON_MONITOR_HANDLER_PER_TASK(name, type)
@@ -3,6 +3,14 @@
#ifndef _RV_RV_H
#define _RV_RV_H
+/*
+ * Deterministic automaton per-object variables.
+ */
+struct da_monitor {
+ bool monitoring;
+ int curr_state;
+};
+
/*
* Per-task RV monitors count. Nowadays fixed in RV_PER_TASK_MONITORS.
* If we find justification for more monitors, we can think about
@@ -16,6 +24,7 @@
* Futher monitor types are expected, so make this a union.
*/
union rv_task_monitor {
+ struct da_monitor da_mon;
};
int get_task_monitor_slot(void);
new file mode 100644
@@ -0,0 +1,120 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#undef TRACE_SYSTEM
+#define TRACE_SYSTEM rv
+
+#if !defined(_TRACE_RV_H) || defined(TRACE_HEADER_MULTI_READ)
+#define _TRACE_RV_H
+
+#include <linux/rv.h>
+#include <linux/tracepoint.h>
+
+#ifdef CONFIG_DA_MON_EVENTS_IMPLICIT
+DECLARE_EVENT_CLASS(event_da_monitor,
+
+ TP_PROTO(char *state, char *event, char *next_state, bool final_state),
+
+ TP_ARGS(state, event, next_state, final_state),
+
+ TP_STRUCT__entry(
+ __array( char, state, MAX_DA_NAME_LEN )
+ __array( char, event, MAX_DA_NAME_LEN )
+ __array( char, next_state, MAX_DA_NAME_LEN )
+ __field( bool, final_state )
+ ),
+
+ TP_fast_assign(
+ memcpy(__entry->state, state, MAX_DA_NAME_LEN);
+ memcpy(__entry->event, event, MAX_DA_NAME_LEN);
+ memcpy(__entry->next_state, next_state, MAX_DA_NAME_LEN);
+ __entry->final_state = final_state;
+ ),
+
+ TP_printk("%s x %s -> %s %s",
+ __entry->state,
+ __entry->event,
+ __entry->next_state,
+ __entry->final_state ? "(final)" : "")
+);
+
+DECLARE_EVENT_CLASS(error_da_monitor,
+
+ TP_PROTO(char *state, char *event),
+
+ TP_ARGS(state, event),
+
+ TP_STRUCT__entry(
+ __array( char, state, MAX_DA_NAME_LEN )
+ __array( char, event, MAX_DA_NAME_LEN )
+ ),
+
+ TP_fast_assign(
+ memcpy(__entry->state, state, MAX_DA_NAME_LEN);
+ memcpy(__entry->event, event, MAX_DA_NAME_LEN);
+ ),
+
+ TP_printk("event %s not expected in the state %s",
+ __entry->event,
+ __entry->state)
+);
+#endif /* CONFIG_DA_MON_EVENTS_IMPLICIT */
+
+#ifdef CONFIG_DA_MON_EVENTS_ID
+DECLARE_EVENT_CLASS(event_da_monitor_id,
+
+ TP_PROTO(int id, char *state, char *event, char *next_state, bool final_state),
+
+ TP_ARGS(id, state, event, next_state, final_state),
+
+ TP_STRUCT__entry(
+ __field( int, id )
+ __array( char, state, MAX_DA_NAME_LEN )
+ __array( char, event, MAX_DA_NAME_LEN )
+ __array( char, next_state, MAX_DA_NAME_LEN )
+ __field( bool, final_state )
+ ),
+
+ TP_fast_assign(
+ memcpy(__entry->state, state, MAX_DA_NAME_LEN);
+ memcpy(__entry->event, event, MAX_DA_NAME_LEN);
+ memcpy(__entry->next_state, next_state, MAX_DA_NAME_LEN);
+ __entry->id = id;
+ __entry->final_state = final_state;
+ ),
+
+ TP_printk("%d: %s x %s -> %s %s",
+ __entry->id,
+ __entry->state,
+ __entry->event,
+ __entry->next_state,
+ __entry->final_state ? "(final)" : "")
+);
+
+DECLARE_EVENT_CLASS(error_da_monitor_id,
+
+ TP_PROTO(int id, char *state, char *event),
+
+ TP_ARGS(id, state, event),
+
+ TP_STRUCT__entry(
+ __field( int, id )
+ __array( char, state, MAX_DA_NAME_LEN )
+ __array( char, event, MAX_DA_NAME_LEN )
+ ),
+
+ TP_fast_assign(
+ memcpy(__entry->state, state, MAX_DA_NAME_LEN);
+ memcpy(__entry->event, event, MAX_DA_NAME_LEN);
+ __entry->id = id;
+ ),
+
+ TP_printk("%d: event %s not expected in the state %s",
+ __entry->id,
+ __entry->event,
+ __entry->state)
+);
+#endif /* CONFIG_DA_MON_EVENTS_ID */
+#endif /* _TRACE_RV_H */
+
+/* This part ust be outside protection */
+#undef TRACE_INCLUDE_PATH
+#include <trace/define_trace.h>
@@ -1964,6 +1964,18 @@ static void copy_oom_score_adj(u64 clone_flags, struct task_struct *tsk)
mutex_unlock(&oom_adj_mutex);
}
+#ifdef CONFIG_RV
+static void rv_task_fork(struct task_struct *p)
+{
+ int i;
+
+ for (i = 0; i < RV_PER_TASK_MONITORS; i++)
+ p->rv[i].da_mon.monitoring = false;
+}
+#else
+#define rv_task_fork(p) do {} while (0)
+#endif
+
/*
* This creates a new process as a copy of the old one,
* but does not actually start it yet.
@@ -2399,6 +2411,8 @@ static __latent_entropy struct task_struct *copy_process(
*/
copy_seccomp(p);
+ rv_task_fork(p);
+
rseq_fork(p, clone_flags);
/* Don't start children in a dying pid namespace */
@@ -1,5 +1,19 @@
# SPDX-License-Identifier: GPL-2.0-only
#
+config DA_MON_EVENTS
+ default n
+ bool
+
+config DA_MON_EVENTS_IMPLICIT
+ select DA_MON_EVENTS
+ default n
+ bool
+
+config DA_MON_EVENTS_ID
+ select DA_MON_EVENTS
+ default n
+ bool
+
menuconfig RV
bool "Runtime Verification"
depends on TRACING
@@ -141,6 +141,11 @@
#include <linux/slab.h>
#include <rv/rv.h>
+#ifdef CONFIG_DA_MON_EVENTS
+#define CREATE_TRACE_POINTS
+#include <trace/events/rv.h>
+#endif
+
#include "rv.h"
DEFINE_MUTEX(rv_interface_lock);
In Linux terms, the runtime verification monitors are encapsulated inside the "RV monitor" abstraction. The "RV monitor" includes a set of instances of the monitor (per-cpu monitor, per-task monitor, and so on), the helper functions that glue the monitor to the system reference model, and the trace output as a reaction for event parsing and exceptions, as depicted below: Linux +----- RV Monitor ----------------------------------+ Formal Realm | | Realm +-------------------+ +----------------+ +-----------------+ | Linux kernel | | Monitor | | Reference | | Tracing | -> | Instance(s) | <- | Model | | (instrumentation) | | (verification) | | (specification) | +-------------------+ +----------------+ +-----------------+ | | | | V | | +----------+ | | | Reaction | | | +--+--+--+-+ | | | | | | | | | +-> trace output ? | +------------------------|--|----------------------+ | +----> panic ? +-------> <user-specified> Add the rv/da_monitor.h, enabling automatic code generation for the *Monitor Instance(s)* using C macros, and code to support it. The benefits of the usage of macro for monitor synthesis are 3-fold as it: - Reduces the code duplication; - Facilitates the bug fix/improvement; - Avoids the case of developers changing the core of the monitor code to manipulate the model in a (let's say) non-standard way. This initial implementation presents three different types of monitor instances: - DECLARE_DA_MON_GLOBAL(name, type) - DECLARE_DA_MON_PER_CPU(name, type) - DECLARE_DA_MON_PER_TASK(name, type) The first declares the functions for a global deterministic automata monitor, the second for monitors with per-cpu instances, and the third with per-task instances. Cc: Wim Van Sebroeck <wim@linux-watchdog.org> Cc: Guenter Roeck <linux@roeck-us.net> Cc: Jonathan Corbet <corbet@lwn.net> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Will Deacon <will@kernel.org> Cc: Catalin Marinas <catalin.marinas@arm.com> Cc: Marco Elver <elver@google.com> Cc: Dmitry Vyukov <dvyukov@google.com> Cc: "Paul E. McKenney" <paulmck@kernel.org> Cc: Shuah Khan <skhan@linuxfoundation.org> Cc: Gabriele Paoloni <gpaoloni@redhat.com> Cc: Juri Lelli <juri.lelli@redhat.com> Cc: Clark Williams <williams@redhat.com> Cc: Tao Zhou <tao.zhou@linux.dev> Cc: Randy Dunlap <rdunlap@infradead.org> Cc: linux-doc@vger.kernel.org Cc: linux-kernel@vger.kernel.org Cc: linux-trace-devel@vger.kernel.org Signed-off-by: Daniel Bristot de Oliveira <bristot@kernel.org> --- include/linux/rv.h | 2 + include/rv/da_monitor.h | 507 ++++++++++++++++++++++++++++++++++++++ include/rv/rv.h | 9 + include/trace/events/rv.h | 120 +++++++++ kernel/fork.c | 14 ++ kernel/trace/rv/Kconfig | 14 ++ kernel/trace/rv/rv.c | 5 + 7 files changed, 671 insertions(+) create mode 100644 include/rv/da_monitor.h create mode 100644 include/trace/events/rv.h