5dff03813f
By default 3-level paging is used when the kernel is compiled with kasan support. Add 4-level paging option to support systems with more then 3TB of physical memory and to cover 4-level paging specific code with kasan as well. Reviewed-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Vasily Gorbik <gor@linux.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
31 lines
898 B
C
31 lines
898 B
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef __ASM_KASAN_H
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#define __ASM_KASAN_H
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#include <asm/pgtable.h>
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#ifdef CONFIG_KASAN
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#define KASAN_SHADOW_SCALE_SHIFT 3
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#ifdef CONFIG_KASAN_S390_4_LEVEL_PAGING
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#define KASAN_SHADOW_SIZE \
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(_AC(1, UL) << (_REGION1_SHIFT - KASAN_SHADOW_SCALE_SHIFT))
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#else
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#define KASAN_SHADOW_SIZE \
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(_AC(1, UL) << (_REGION2_SHIFT - KASAN_SHADOW_SCALE_SHIFT))
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#endif
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#define KASAN_SHADOW_OFFSET _AC(CONFIG_KASAN_SHADOW_OFFSET, UL)
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#define KASAN_SHADOW_START KASAN_SHADOW_OFFSET
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#define KASAN_SHADOW_END (KASAN_SHADOW_START + KASAN_SHADOW_SIZE)
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extern void kasan_early_init(void);
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extern void kasan_copy_shadow(pgd_t *dst);
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extern void kasan_free_early_identity(void);
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#else
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static inline void kasan_early_init(void) { }
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static inline void kasan_copy_shadow(pgd_t *dst) { }
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static inline void kasan_free_early_identity(void) { }
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#endif
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#endif
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