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-rw-r--r--kernel/trace/rv/Kconfig3
-rw-r--r--kernel/trace/rv/monitors/pagefault/pagefault.c2
-rw-r--r--kernel/trace/rv/monitors/sleep/sleep.c26
-rw-r--r--kernel/trace/rv/rv.c26
-rw-r--r--kernel/trace/rv/rv_monitors_test.c1
5 files changed, 44 insertions, 14 deletions
diff --git a/kernel/trace/rv/Kconfig b/kernel/trace/rv/Kconfig
index 5608314de06b..efa930f94ea4 100644
--- a/kernel/trace/rv/Kconfig
+++ b/kernel/trace/rv/Kconfig
@@ -122,4 +122,7 @@ config RV_MONITORS_KUNIT_TEST
These tests verify that monitors correctly detect violations by
triggering fake events and validating the expected reactions.
+ Enabling this may slightly increase overhead of some monitors if any
+ unrelated KUnit test is running.
+
If unsure, say N.
diff --git a/kernel/trace/rv/monitors/pagefault/pagefault.c b/kernel/trace/rv/monitors/pagefault/pagefault.c
index 5e1a2a606783..e52500fd2de0 100644
--- a/kernel/trace/rv/monitors/pagefault/pagefault.c
+++ b/kernel/trace/rv/monitors/pagefault/pagefault.c
@@ -38,7 +38,7 @@ static void ltl_atoms_init(struct task_struct *task, struct ltl_monitor *mon, bo
static void handle_page_fault(void *data, unsigned long address, struct pt_regs *regs,
unsigned long error_code)
{
- ltl_atom_pulse(current, LTL_PAGEFAULT, true);
+ ltl_atom_pulse(rv_get_current(), LTL_PAGEFAULT, true);
}
static int enable_pagefault(void)
diff --git a/kernel/trace/rv/monitors/sleep/sleep.c b/kernel/trace/rv/monitors/sleep/sleep.c
index 4fd5e20151a8..a1b569a4b183 100644
--- a/kernel/trace/rv/monitors/sleep/sleep.c
+++ b/kernel/trace/rv/monitors/sleep/sleep.c
@@ -65,7 +65,7 @@ static void handle_sched_set_state(void *data, struct task_struct *task, int sta
static void handle_sched_exit(void *data, bool is_switch)
{
- ltl_atom_pulse(current, LTL_SCHEDULE_IN, true);
+ ltl_atom_pulse(rv_get_current(), LTL_SCHEDULE_IN, true);
}
static void handle_sched_waking(void *data, struct task_struct *task)
@@ -73,7 +73,7 @@ static void handle_sched_waking(void *data, struct task_struct *task)
if (in_hardirq()) {
ltl_atom_pulse(task, LTL_WOKEN_BY_HARDIRQ, true);
} else if (in_task()) {
- if (current->prio <= task->prio)
+ if (rv_get_current()->prio <= task->prio)
ltl_atom_pulse(task, LTL_WOKEN_BY_EQUAL_OR_HIGHER_PRIO, true);
} else if (in_nmi()) {
ltl_atom_pulse(task, LTL_WOKEN_BY_NMI, true);
@@ -83,12 +83,12 @@ static void handle_sched_waking(void *data, struct task_struct *task)
static void handle_contention_begin(void *data, void *lock, unsigned int flags)
{
if (flags & LCB_F_RT)
- ltl_atom_update(current, LTL_BLOCK_ON_RT_MUTEX, true);
+ ltl_atom_update(rv_get_current(), LTL_BLOCK_ON_RT_MUTEX, true);
}
static void handle_contention_end(void *data, void *lock, int ret)
{
- ltl_atom_update(current, LTL_BLOCK_ON_RT_MUTEX, false);
+ ltl_atom_update(rv_get_current(), LTL_BLOCK_ON_RT_MUTEX, false);
}
static void handle_sys_enter(void *data, struct pt_regs *regs, long id)
@@ -97,7 +97,7 @@ static void handle_sys_enter(void *data, struct pt_regs *regs, long id)
unsigned long args[6];
int op, cmd;
- mon = ltl_get_monitor(current);
+ mon = ltl_get_monitor(rv_get_current());
switch (id) {
#ifdef __NR_clock_nanosleep
@@ -106,10 +106,10 @@ static void handle_sys_enter(void *data, struct pt_regs *regs, long id)
#ifdef __NR_clock_nanosleep_time64
case __NR_clock_nanosleep_time64:
#endif
- syscall_get_arguments(current, regs, args);
+ syscall_get_arguments(rv_get_current(), regs, args);
ltl_atom_set(mon, LTL_NANOSLEEP_CLOCK_REALTIME, args[0] == CLOCK_REALTIME);
ltl_atom_set(mon, LTL_NANOSLEEP_TIMER_ABSTIME, args[1] == TIMER_ABSTIME);
- ltl_atom_update(current, LTL_CLOCK_NANOSLEEP, true);
+ ltl_atom_update(rv_get_current(), LTL_CLOCK_NANOSLEEP, true);
break;
#ifdef __NR_futex
@@ -118,25 +118,25 @@ static void handle_sys_enter(void *data, struct pt_regs *regs, long id)
#ifdef __NR_futex_time64
case __NR_futex_time64:
#endif
- syscall_get_arguments(current, regs, args);
+ syscall_get_arguments(rv_get_current(), regs, args);
op = args[1];
cmd = op & FUTEX_CMD_MASK;
switch (cmd) {
case FUTEX_LOCK_PI:
case FUTEX_LOCK_PI2:
- ltl_atom_update(current, LTL_FUTEX_LOCK_PI, true);
+ ltl_atom_update(rv_get_current(), LTL_FUTEX_LOCK_PI, true);
break;
case FUTEX_WAIT:
case FUTEX_WAIT_BITSET:
case FUTEX_WAIT_REQUEUE_PI:
- ltl_atom_update(current, LTL_FUTEX_WAIT, true);
+ ltl_atom_update(rv_get_current(), LTL_FUTEX_WAIT, true);
break;
}
break;
#ifdef __NR_epoll_wait
case __NR_epoll_wait:
- ltl_atom_update(current, LTL_EPOLL_WAIT, true);
+ ltl_atom_update(rv_get_current(), LTL_EPOLL_WAIT, true);
break;
#endif
}
@@ -144,14 +144,14 @@ static void handle_sys_enter(void *data, struct pt_regs *regs, long id)
static void handle_sys_exit(void *data, struct pt_regs *regs, long ret)
{
- struct ltl_monitor *mon = ltl_get_monitor(current);
+ struct ltl_monitor *mon = ltl_get_monitor(rv_get_current());
ltl_atom_set(mon, LTL_FUTEX_LOCK_PI, false);
ltl_atom_set(mon, LTL_FUTEX_WAIT, false);
ltl_atom_set(mon, LTL_NANOSLEEP_CLOCK_REALTIME, false);
ltl_atom_set(mon, LTL_NANOSLEEP_TIMER_ABSTIME, false);
ltl_atom_set(mon, LTL_EPOLL_WAIT, false);
- ltl_atom_update(current, LTL_CLOCK_NANOSLEEP, false);
+ ltl_atom_update(rv_get_current(), LTL_CLOCK_NANOSLEEP, false);
}
static int enable_sleep(void)
diff --git a/kernel/trace/rv/rv.c b/kernel/trace/rv/rv.c
index 4f577d9b5ba8..29f155c6968b 100644
--- a/kernel/trace/rv/rv.c
+++ b/kernel/trace/rv/rv.c
@@ -885,4 +885,30 @@ void rv_clear_testing(struct kunit_suite *suite)
mutex_unlock(&rv_interface_lock);
}
EXPORT_SYMBOL_IF_KUNIT(rv_clear_testing);
+
+/*
+ * rv_get_mock_current() is called only if we are running from a KUnit test.
+ * This can occur from a legitimate RV test or any unrelated test running when
+ * a real RV monitor is active and triggering events.
+ * We assume the former case is the only one where mock_current is not NULL and
+ * can occur only sequentially (KUnit doesn't run tests in parallel).
+ * We cannot rely on the test's context because there is no way to safely
+ * understand from which test we are running and KUnit utilities require
+ * locking, which is unsafe from NMI or scheduling context.
+ * Note that it is not possible for a real RV monitor to run when the RV KUnit
+ * tests are running (see rv_set_testing()).
+ */
+static struct task_struct *mock_current;
+
+void rv_mock_current(struct task_struct *tsk)
+{
+ mock_current = tsk;
+}
+EXPORT_SYMBOL_IF_KUNIT(rv_mock_current);
+
+struct task_struct *rv_get_mock_current(void)
+{
+ return mock_current ?: current;
+}
+EXPORT_SYMBOL_GPL(rv_get_mock_current);
#endif
diff --git a/kernel/trace/rv/rv_monitors_test.c b/kernel/trace/rv/rv_monitors_test.c
index be440bf4b4a7..e58bd677ae0b 100644
--- a/kernel/trace/rv/rv_monitors_test.c
+++ b/kernel/trace/rv/rv_monitors_test.c
@@ -57,6 +57,7 @@ void teardown_test(void *arg)
else
mon->rv_this->react = NULL;
active_ctx = NULL;
+ rv_mock_current(NULL);
if (mon->is_per_task)
*mon->task_slot = RV_PER_TASK_MONITOR_INIT;
generated by cgit v1.2.3 (git 2.0.4) at 2026-08-20 16:49:16 +0000