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Index of /anon_sym/anon/sys/dev/char/4:20/subsystem/tty31
Index of /anon_sym/anon/sys/dev/char/4:20/subsystem/tty31
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/* SPDX-License-Identifier: GPL-2.0 */
/*
* KCSAN access checks and modifiers. These can be used to explicitly check
* uninstrumented accesses, or change KCSAN checking behaviour of accesses.
*
* Copyright (C) 2019, Google LLC.
*/
#ifndef _LINUX_KCSAN_CHECKS_H
#define _LINUX_KCSAN_CHECKS_H
/* Note: Only include what is already included by compiler.h. */
#include
#include
/* Access types -- if KCSAN_ACCESS_WRITE is not set, the access is a read. */
#define KCSAN_ACCESS_WRITE (1 << 0) /* Access is a write. */
#define KCSAN_ACCESS_COMPOUND (1 << 1) /* Compounded read-write instrumentation. */
#define KCSAN_ACCESS_ATOMIC (1 << 2) /* Access is atomic. */
/* The following are special, and never due to compiler instrumentation. */
#define KCSAN_ACCESS_ASSERT (1 << 3) /* Access is an assertion. */
#define KCSAN_ACCESS_SCOPED (1 << 4) /* Access is a scoped access. */
/*
* __kcsan_*: Always calls into the runtime when KCSAN is enabled. This may be used
* even in compilation units that selectively disable KCSAN, but must use KCSAN
* to validate access to an address. Never use these in header files!
*/
#ifdef CONFIG_KCSAN
/**
* __kcsan_check_access - check generic access for races
*
* @ptr: address of access
* @size: size of access
* @type: access type modifier
*/
void __kcsan_check_access(const volatile void *ptr, size_t size, int type);
/*
* See definition of __tsan_atomic_signal_fence() in kernel/kcsan/core.c.
* Note: The mappings are arbitrary, and do not reflect any real mappings of C11
* memory orders to the LKMM memory orders and vice-versa!
*/
#define __KCSAN_BARRIER_TO_SIGNAL_FENCE_mb __ATOMIC_SEQ_CST
#define __KCSAN_BARRIER_TO_SIGNAL_FENCE_wmb __ATOMIC_ACQ_REL
#define __KCSAN_BARRIER_TO_SIGNAL_FENCE_rmb __ATOMIC_ACQUIRE
#define __KCSAN_BARRIER_TO_SIGNAL_FENCE_release __ATOMIC_RELEASE
/**
* __kcsan_mb - full memory barrier instrumentation
*/
void __kcsan_mb(void);
/**
* __kcsan_wmb - write memory barrier instrumentation
*/
void __kcsan_wmb(void);
/**
* __kcsan_rmb - read memory barrier instrumentation
*/
void __kcsan_rmb(void);
/**
* __kcsan_release - release barrier instrumentation
*/
void __kcsan_release(void);
/**
* kcsan_disable_current - disable KCSAN for the current context
*
* Supports nesting.
*/
void kcsan_disable_current(void);
/**
* kcsan_enable_current - re-enable KCSAN for the current context
*
* Supports nesting.
*/
void kcsan_enable_current(void);
void kcsan_enable_current_nowarn(void); /* Safe in uaccess regions. */
/**
* kcs