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/arm64/mm/dma-mapping.c | 59 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 59 insertions(+) create mode 100644 arch/arm64/mm/dma-mapping.c (limited to 'arch/arm64/mm/dma-mapping.c') diff --git a/arch/arm64/mm/dma-mapping.c b/arch/arm64/mm/dma-mapping.c new file mode 100644 index 000000000..7f6f2f40d --- /dev/null +++ b/arch/arm64/mm/dma-mapping.c @@ -0,0 +1,59 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (C) 2012 ARM Ltd. + * Author: Catalin Marinas + */ + +#include +#include +#include +#include + +#include +#include + +void arch_sync_dma_for_device(phys_addr_t paddr, size_t size, + enum dma_data_direction dir) +{ + unsigned long start = (unsigned long)phys_to_virt(paddr); + + dcache_clean_poc_nosync(start, start + size); +} + +void arch_sync_dma_for_cpu(phys_addr_t paddr, size_t size, + enum dma_data_direction dir) +{ + unsigned long start = (unsigned long)phys_to_virt(paddr); + + if (dir == DMA_TO_DEVICE) + return; + + dcache_inval_poc_nosync(start, start + size); +} + +void arch_dma_prep_coherent(struct page *page, size_t size) +{ + unsigned long start = (unsigned long)page_address(page); + + dcache_clean_poc(start, start + size); +} + +void arch_setup_dma_ops(struct device *dev, bool coherent) +{ + int cls = cache_line_size_of_cpu(); + + if (!coherent && !CLIDR_LOC(read_sysreg(clidr_el1))) { + dev_warn(dev, "CLIDR_EL1.LoC == 0, treating as coherent\n"); + coherent = true; + } + + WARN_TAINT(!coherent && cls > ARCH_DMA_MINALIGN, + TAINT_CPU_OUT_OF_SPEC, + "%s %s: ARCH_DMA_MINALIGN smaller than CTR_EL0.CWG (%d < %d)", + dev_driver_string(dev), dev_name(dev), + ARCH_DMA_MINALIGN, cls); + + dev_assign_dma_coherent(dev, coherent); + + xen_setup_dma_ops(dev); +} -- cgit v1.3.1