mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git
synced 2024-10-30 08:02:30 +00:00
01b4ff58f7
Both affect access checks, and should therefore be in kcsan-checks.h. This is in preparation to use these in compiler.h. Acked-by: Will Deacon <will@kernel.org> Signed-off-by: Marco Elver <elver@google.com> Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
59 lines
1.6 KiB
C
59 lines
1.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
|
|
#ifndef _LINUX_KCSAN_H
|
|
#define _LINUX_KCSAN_H
|
|
|
|
#include <linux/kcsan-checks.h>
|
|
#include <linux/types.h>
|
|
|
|
#ifdef CONFIG_KCSAN
|
|
|
|
/*
|
|
* Context for each thread of execution: for tasks, this is stored in
|
|
* task_struct, and interrupts access internal per-CPU storage.
|
|
*/
|
|
struct kcsan_ctx {
|
|
int disable_count; /* disable counter */
|
|
int atomic_next; /* number of following atomic ops */
|
|
|
|
/*
|
|
* We distinguish between: (a) nestable atomic regions that may contain
|
|
* other nestable regions; and (b) flat atomic regions that do not keep
|
|
* track of nesting. Both (a) and (b) are entirely independent of each
|
|
* other, and a flat region may be started in a nestable region or
|
|
* vice-versa.
|
|
*
|
|
* This is required because, for example, in the annotations for
|
|
* seqlocks, we declare seqlock writer critical sections as (a) nestable
|
|
* atomic regions, but reader critical sections as (b) flat atomic
|
|
* regions, but have encountered cases where seqlock reader critical
|
|
* sections are contained within writer critical sections (the opposite
|
|
* may be possible, too).
|
|
*
|
|
* To support these cases, we independently track the depth of nesting
|
|
* for (a), and whether the leaf level is flat for (b).
|
|
*/
|
|
int atomic_nest_count;
|
|
bool in_flat_atomic;
|
|
|
|
/*
|
|
* Access mask for all accesses if non-zero.
|
|
*/
|
|
unsigned long access_mask;
|
|
|
|
/* List of scoped accesses. */
|
|
struct list_head scoped_accesses;
|
|
};
|
|
|
|
/**
|
|
* kcsan_init - initialize KCSAN runtime
|
|
*/
|
|
void kcsan_init(void);
|
|
|
|
#else /* CONFIG_KCSAN */
|
|
|
|
static inline void kcsan_init(void) { }
|
|
|
|
#endif /* CONFIG_KCSAN */
|
|
|
|
#endif /* _LINUX_KCSAN_H */
|