forked from Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
42 lines
1.1 KiB
42 lines
1.1 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
|
|
|
#ifndef _ASM_S390_KFENCE_H |
|
#define _ASM_S390_KFENCE_H |
|
|
|
#include <linux/mm.h> |
|
#include <linux/kfence.h> |
|
#include <asm/set_memory.h> |
|
#include <asm/page.h> |
|
|
|
void __kernel_map_pages(struct page *page, int numpages, int enable); |
|
|
|
static __always_inline bool arch_kfence_init_pool(void) |
|
{ |
|
return true; |
|
} |
|
|
|
#define arch_kfence_test_address(addr) ((addr) & PAGE_MASK) |
|
|
|
/* |
|
* Do not split kfence pool to 4k mapping with arch_kfence_init_pool(), |
|
* but earlier where page table allocations still happen with memblock. |
|
* Reason is that arch_kfence_init_pool() gets called when the system |
|
* is still in a limbo state - disabling and enabling bottom halves is |
|
* not yet allowed, but that is what our page_table_alloc() would do. |
|
*/ |
|
static __always_inline void kfence_split_mapping(void) |
|
{ |
|
#ifdef CONFIG_KFENCE |
|
unsigned long pool_pages = KFENCE_POOL_SIZE >> PAGE_SHIFT; |
|
|
|
set_memory_4k((unsigned long)__kfence_pool, pool_pages); |
|
#endif |
|
} |
|
|
|
static inline bool kfence_protect_page(unsigned long addr, bool protect) |
|
{ |
|
__kernel_map_pages(virt_to_page(addr), 1, !protect); |
|
return true; |
|
} |
|
|
|
#endif /* _ASM_S390_KFENCE_H */
|
|
|