From 3a2c4d55e32ad65efebdb6de44eef3bfa08bb49d Mon Sep 17 00:00:00 2001 From: Kees Cook Date: Wed, 2 Sep 2026 15:31:14 -0700 Subject: treewide: refresh kmalloc_obj() conversions This is another run of the Coccinelle script for converting kmalloc() family of allocations to kmalloc_obj() via the existing rules in scripts/coccinelle/api/kmalloc_objs.cocci This catches both the set of kmalloc() uses added since the first kmalloc_obj() conversions in v7.0 and adds a large group missed in the first pass due to Coccinelle not interacting well with the cleanup.h scoped_...() family of macros[1]. I worked around this with spatch's "--macro-file" argument to a file with all the scoped_...() macros mapped to Coccinelle's YACFE_ITERATOR[2] as that was the closest viable control flow indicator I could find. Build tested allmodconfig on x86, arm64, arm, loongarch, mips, powerpc, riscv, and s390 with no new warnings. Link: https://lore.kernel.org/lkml/202609021314.8A9C0B8@keescook/ [1] Link: https://github.com/coccinelle/coccinelle/blob/master/standard.h [2] Signed-off-by: Kees Cook --- arch/arm/mm/cache-v4.S | 148 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 148 insertions(+) create mode 100644 arch/arm/mm/cache-v4.S (limited to 'arch/arm/mm/cache-v4.S') diff --git a/arch/arm/mm/cache-v4.S b/arch/arm/mm/cache-v4.S new file mode 100644 index 000000000..001d7042b --- /dev/null +++ b/arch/arm/mm/cache-v4.S @@ -0,0 +1,148 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ +/* + * linux/arch/arm/mm/cache-v4.S + * + * Copyright (C) 1997-2002 Russell king + */ +#include +#include +#include +#include +#include +#include "proc-macros.S" + +/* + * flush_icache_all() + * + * Unconditionally clean and invalidate the entire icache. + */ +SYM_TYPED_FUNC_START(v4_flush_icache_all) + ret lr +SYM_FUNC_END(v4_flush_icache_all) + +/* + * flush_user_cache_all() + * + * Invalidate all cache entries in a particular address + * space. + * + * - mm - mm_struct describing address space + */ +SYM_FUNC_ALIAS(v4_flush_user_cache_all, v4_flush_kern_cache_all) + +/* + * flush_kern_cache_all() + * + * Clean and invalidate the entire cache. + */ +SYM_TYPED_FUNC_START(v4_flush_kern_cache_all) +#ifdef CONFIG_CPU_CP15 + mov r0, #0 + mcr p15, 0, r0, c7, c7, 0 @ flush ID cache + ret lr +#else + ret lr +#endif +SYM_FUNC_END(v4_flush_kern_cache_all) + +/* + * flush_user_cache_range(start, end, flags) + * + * Invalidate a range of cache entries in the specified + * address space. + * + * - start - start address (may not be aligned) + * - end - end address (exclusive, may not be aligned) + * - flags - vma_area_struct flags describing address space + */ +SYM_TYPED_FUNC_START(v4_flush_user_cache_range) +#ifdef CONFIG_CPU_CP15 + mov ip, #0 + mcr p15, 0, ip, c7, c7, 0 @ flush ID cache + ret lr +#else + ret lr +#endif +SYM_FUNC_END(v4_flush_user_cache_range) + +/* + * coherent_kern_range(start, end) + * + * Ensure coherency between the Icache and the Dcache in the + * region described by start. If you have non-snooping + * Harvard caches, you need to implement this function. + * + * - start - virtual start address + * - end - virtual end address + */ +SYM_TYPED_FUNC_START(v4_coherent_kern_range) + ret lr +SYM_FUNC_END(v4_coherent_kern_range) + +/* + * coherent_user_range(start, end) + * + * Ensure coherency between the Icache and the Dcache in the + * region described by start. If you have non-snooping + * Harvard caches, you need to implement this function. + * + * - start - virtual start address + * - end - virtual end address + */ +SYM_TYPED_FUNC_START(v4_coherent_user_range) + mov r0, #0 + ret lr +SYM_FUNC_END(v4_coherent_user_range) + +/* + * flush_kern_dcache_area(void *addr, size_t size) + * + * Ensure no D cache aliasing occurs, either with itself or + * the I cache + * + * - addr - kernel address + * - size - region size + */ +SYM_TYPED_FUNC_START(v4_flush_kern_dcache_area) +#ifdef CONFIG_CFI /* Fallthrough if !CFI */ + b v4_dma_flush_range +#endif +SYM_FUNC_END(v4_flush_kern_dcache_area) + +/* + * dma_flush_range(start, end) + * + * Clean and invalidate the specified virtual address range. + * + * - start - virtual start address + * - end - virtual end address + */ +SYM_TYPED_FUNC_START(v4_dma_flush_range) +#ifdef CONFIG_CPU_CP15 + mov r0, #0 + mcr p15, 0, r0, c7, c7, 0 @ flush ID cache +#endif + ret lr +SYM_FUNC_END(v4_dma_flush_range) + +/* + * dma_unmap_area(start, size, dir) + * - start - kernel virtual start address + * - size - size of region + * - dir - DMA direction + */ +SYM_TYPED_FUNC_START(v4_dma_unmap_area) + teq r2, #DMA_TO_DEVICE + bne v4_dma_flush_range + ret lr +SYM_FUNC_END(v4_dma_unmap_area) + +/* + * dma_map_area(start, size, dir) + * - start - kernel virtual start address + * - size - size of region + * - dir - DMA direction + */ +SYM_TYPED_FUNC_START(v4_dma_map_area) + ret lr +SYM_FUNC_END(v4_dma_map_area) -- cgit v1.3.1