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48 lines
1.1 KiB
C
48 lines
1.1 KiB
C
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/* SPDX-License-Identifier: GPL-2.0 */
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/*
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* Special rules for ignoring entire classes of data-racy memory accesses. None
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* of the rules here imply that such data races are generally safe!
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*
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* All rules in this file can be configured via CONFIG_KCSAN_PERMISSIVE. Keep
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* them separate from core code to make it easier to audit.
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*
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* Copyright (C) 2019, Google LLC.
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*/
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#ifndef _KERNEL_KCSAN_PERMISSIVE_H
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#define _KERNEL_KCSAN_PERMISSIVE_H
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#include <linux/types.h>
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/*
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* Access ignore rules based on address.
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*/
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static __always_inline bool kcsan_ignore_address(const volatile void *ptr)
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{
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if (!IS_ENABLED(CONFIG_KCSAN_PERMISSIVE))
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return false;
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return false;
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}
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/*
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* Data race ignore rules based on access type and value change patterns.
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*/
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static bool
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kcsan_ignore_data_race(size_t size, int type, u64 old, u64 new, u64 diff)
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{
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if (!IS_ENABLED(CONFIG_KCSAN_PERMISSIVE))
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return false;
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/*
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* Rules here are only for plain read accesses, so that we still report
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* data races between plain read-write accesses.
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*/
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if (type || size > sizeof(long))
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return false;
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return false;
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}
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#endif /* _KERNEL_KCSAN_PERMISSIVE_H */
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