diff options
| -rw-r--r-- | arch/arm64/mm/mmu.c | 27 |
1 files changed, 6 insertions, 21 deletions
diff --git a/arch/arm64/mm/mmu.c b/arch/arm64/mm/mmu.c index da81444015dc..661ff3c1fe10 100644 --- a/arch/arm64/mm/mmu.c +++ b/arch/arm64/mm/mmu.c @@ -1083,36 +1083,24 @@ static int __init parse_kfence_early_init(char *arg) } early_param("kfence.sample_interval", parse_kfence_early_init); -static phys_addr_t __init arm64_kfence_alloc_pool(void) +static void __init arm64_kfence_map_pool(void) { phys_addr_t kfence_pool; if (!kfence_early_init) - return 0; + return; kfence_pool = memblock_phys_alloc(KFENCE_POOL_SIZE, PAGE_SIZE); if (!kfence_pool) { pr_err("failed to allocate kfence pool\n"); kfence_early_init = false; - return 0; - } - - /* Temporarily mark as NOMAP. */ - memblock_mark_nomap(kfence_pool, KFENCE_POOL_SIZE); - - return kfence_pool; -} - -static void __init arm64_kfence_map_pool(phys_addr_t kfence_pool) -{ - if (!kfence_pool) return; + } /* KFENCE pool needs page-level mapping. */ __map_memblock(kfence_pool, kfence_pool + KFENCE_POOL_SIZE, pgprot_tagged(PAGE_KERNEL), - NO_BLOCK_MAPPINGS | NO_CONT_MAPPINGS); - memblock_clear_nomap(kfence_pool, KFENCE_POOL_SIZE); + NO_BLOCK_MAPPINGS | NO_CONT_MAPPINGS | NO_EXEC_MAPPINGS); __kfence_pool = phys_to_virt(kfence_pool); } @@ -1144,8 +1132,7 @@ bool arch_kfence_init_pool(void) } #else /* CONFIG_KFENCE */ -static inline phys_addr_t arm64_kfence_alloc_pool(void) { return 0; } -static inline void arm64_kfence_map_pool(phys_addr_t kfence_pool) { } +static inline void arm64_kfence_map_pool(void) { } #endif /* CONFIG_KFENCE */ @@ -1155,7 +1142,6 @@ static void __init map_mem(void) phys_addr_t kernel_start = __pa_symbol(_text); phys_addr_t kernel_end = __pa_symbol(__init_begin); phys_addr_t start, end; - phys_addr_t early_kfence_pool; int flags = NO_EXEC_MAPPINGS; u64 i; @@ -1172,7 +1158,7 @@ static void __init map_mem(void) BUILD_BUG_ON(pgd_index(direct_map_end - 1) == pgd_index(direct_map_end) && pgd_index(_PAGE_OFFSET(VA_BITS_MIN)) != PTRS_PER_PGD - 1); - early_kfence_pool = arm64_kfence_alloc_pool(); + arm64_kfence_map_pool(); linear_map_requires_bbml2 = !force_pte_mapping() && can_set_direct_map(); @@ -1210,7 +1196,6 @@ static void __init map_mem(void) */ __map_memblock(kernel_start, kernel_end, PAGE_KERNEL, NO_CONT_MAPPINGS); memblock_clear_nomap(kernel_start, kernel_end - kernel_start); - arm64_kfence_map_pool(early_kfence_pool); } void mark_rodata_ro(void) |