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charset="UTF-8" X-Rspamd-Server: rspam04 X-Rspam-User: X-Stat-Signature: 86nyct7ra5h6mhbehod7r46mbfbqh1by X-Rspamd-Queue-Id: 97FBA4000F X-HE-Tag: 1789988462-112282 X-HE-Meta: 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 gptBtSAy 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 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: With the MEMBLOCK_PTEMAP flag, force a PTE-level mapping. Signed-off-by: Vincent Donnefort --- arch/arm64/mm/mmu.c | 23 ++++++++++++++++------- 1 file changed, 16 insertions(+), 7 deletions(-) diff --git a/arch/arm64/mm/mmu.c b/arch/arm64/mm/mmu.c index 79d90226fd5d..6b22b43a5f77 100644 --- a/arch/arm64/mm/mmu.c +++ b/arch/arm64/mm/mmu.c @@ -1184,9 +1184,8 @@ static void __init map_mem(void) phys_addr_t init_begin = __pa_symbol(__init_begin); phys_addr_t init_end = __pa_symbol(__init_end); phys_addr_t kernel_end = __pa_symbol(__bss_stop); - phys_addr_t start, end; int flags = NO_EXEC_MAPPINGS; - u64 i; + struct memblock_region *r; /* * Setting hierarchical PXNTable attributes on table entries covering @@ -1226,9 +1225,13 @@ static void __init map_mem(void) flags); /* map all the memory banks */ - for_each_mem_range(i, &start, &end) { + for_each_mem_region(r) { + phys_addr_t start, end; + + if (memblock_is_nomap(r)) + continue; /* - * for_each_mem_range may return sub-page-aligned boundaries + * for_each_mem_region may return sub-page-aligned boundaries * after memblock_mark_nomap() splits regions at byte precision. * __create_pgd_mapping_locked aligns phys down to PAGE_MASK, * which could accidentally map no-map memory on the boundary. @@ -1237,17 +1240,23 @@ static void __init map_mem(void) * regions. The cost is at most one page of unmapped gap at * each boundary. */ - start = PAGE_ALIGN(start); - end = end & PAGE_MASK; + start = PAGE_ALIGN(r->base); + end = (r->base + r->size) & PAGE_MASK; if (start >= end) continue; + + int rflags = flags; + + if (memblock_is_ptemap(r)) + rflags |= NO_BLOCK_MAPPINGS | NO_CONT_MAPPINGS; + /* * The linear map must allow allocation tags reading/writing * if MTE is present. Otherwise, it has the same attributes as * PAGE_KERNEL. */ __map_memblock(start, end, pgprot_tagged(PAGE_KERNEL), - flags); + rflags); } } -- 2.55.0.1082.g2b9226bbc0-goog