mirror of https://github.com/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.
56 lines
1.5 KiB
56 lines
1.5 KiB
// SPDX-License-Identifier: GPL-2.0 |
|
|
|
#define DISABLE_BRANCH_PROFILING |
|
|
|
#include <linux/kasan.h> |
|
#include <linux/memblock.h> |
|
#include <mm/mmu_decl.h> |
|
|
|
int __init kasan_init_region(void *start, size_t size) |
|
{ |
|
unsigned long k_start = (unsigned long)kasan_mem_to_shadow(start); |
|
unsigned long k_end = (unsigned long)kasan_mem_to_shadow(start + size); |
|
unsigned long k_cur = k_start; |
|
int k_size = k_end - k_start; |
|
int k_size_base = 1 << (ffs(k_size) - 1); |
|
int ret; |
|
void *block; |
|
|
|
block = memblock_alloc(k_size, k_size_base); |
|
|
|
if (block && k_size_base >= SZ_128K && k_start == ALIGN(k_start, k_size_base)) { |
|
int k_size_more = 1 << (ffs(k_size - k_size_base) - 1); |
|
|
|
setbat(-1, k_start, __pa(block), k_size_base, PAGE_KERNEL); |
|
if (k_size_more >= SZ_128K) |
|
setbat(-1, k_start + k_size_base, __pa(block) + k_size_base, |
|
k_size_more, PAGE_KERNEL); |
|
if (v_block_mapped(k_start)) |
|
k_cur = k_start + k_size_base; |
|
if (v_block_mapped(k_start + k_size_base)) |
|
k_cur = k_start + k_size_base + k_size_more; |
|
|
|
update_bats(); |
|
} |
|
|
|
if (!block) |
|
block = memblock_alloc(k_size, PAGE_SIZE); |
|
if (!block) |
|
return -ENOMEM; |
|
|
|
ret = kasan_init_shadow_page_tables(k_start, k_end); |
|
if (ret) |
|
return ret; |
|
|
|
kasan_update_early_region(k_start, k_cur, __pte(0)); |
|
|
|
for (; k_cur < k_end; k_cur += PAGE_SIZE) { |
|
pmd_t *pmd = pmd_off_k(k_cur); |
|
void *va = block + k_cur - k_start; |
|
pte_t pte = pfn_pte(PHYS_PFN(__pa(va)), PAGE_KERNEL); |
|
|
|
__set_pte_at(&init_mm, k_cur, pte_offset_kernel(pmd, k_cur), pte, 0); |
|
} |
|
flush_tlb_kernel_range(k_start, k_end); |
|
return 0; |
|
}
|
|
|