ec97d022f6
In order to alloc sub-arches to alloc KASAN regions using optimised methods (Huge pages on 8xx, BATs on BOOK3S, ...), declare kasan_init_region() weak. Also make kasan_init_shadow_page_tables() accessible from outside, so that it can be called from the specific kasan_init_region() functions if needed. And populate remaining KASAN address space only once performed the region mapping, to allow 8xx to allocate hugepd instead of standard page tables for mapping via 8M hugepages. Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Link: https://lore.kernel.org/r/3c1ce419fa1b5a4171b92d7fb16455ca17e1b96d.1589866984.git.christophe.leroy@csgroup.eu
42 lines
1.0 KiB
C
42 lines
1.0 KiB
C
/* SPDX-License-Identifier: GPL-2.0 */
|
|
#ifndef __ASM_KASAN_H
|
|
#define __ASM_KASAN_H
|
|
|
|
#ifdef CONFIG_KASAN
|
|
#define _GLOBAL_KASAN(fn) _GLOBAL(__##fn)
|
|
#define _GLOBAL_TOC_KASAN(fn) _GLOBAL_TOC(__##fn)
|
|
#define EXPORT_SYMBOL_KASAN(fn) EXPORT_SYMBOL(__##fn)
|
|
#else
|
|
#define _GLOBAL_KASAN(fn) _GLOBAL(fn)
|
|
#define _GLOBAL_TOC_KASAN(fn) _GLOBAL_TOC(fn)
|
|
#define EXPORT_SYMBOL_KASAN(fn)
|
|
#endif
|
|
|
|
#ifndef __ASSEMBLY__
|
|
|
|
#include <asm/page.h>
|
|
|
|
#define KASAN_SHADOW_SCALE_SHIFT 3
|
|
|
|
#define KASAN_SHADOW_START (KASAN_SHADOW_OFFSET + \
|
|
(PAGE_OFFSET >> KASAN_SHADOW_SCALE_SHIFT))
|
|
|
|
#define KASAN_SHADOW_OFFSET ASM_CONST(CONFIG_KASAN_SHADOW_OFFSET)
|
|
|
|
#define KASAN_SHADOW_END (-(-KASAN_SHADOW_START >> KASAN_SHADOW_SCALE_SHIFT))
|
|
|
|
#ifdef CONFIG_KASAN
|
|
void kasan_early_init(void);
|
|
void kasan_init(void);
|
|
void kasan_late_init(void);
|
|
#else
|
|
static inline void kasan_init(void) { }
|
|
static inline void kasan_late_init(void) { }
|
|
#endif
|
|
|
|
int kasan_init_shadow_page_tables(unsigned long k_start, unsigned long k_end);
|
|
int kasan_init_region(void *start, size_t size);
|
|
|
|
#endif /* __ASSEMBLY */
|
|
#endif
|