| /linux-6.14.4/Documentation/core-api/ |
| D | unaligned-memory-access.rst | 15 unaligned accesses, why you need to write code that doesn't cause them,
19 The definition of an unaligned access
25 reading 4 bytes of data from address 0x10005 would be an unaligned memory
52 Why unaligned access is bad
55 The effects of performing an unaligned memory access vary from architecture
59 - Some architectures are able to perform unaligned memory accesses
61 - Some architectures raise processor exceptions when unaligned accesses
62 happen. The exception handler is able to correct the unaligned access,
64 - Some architectures raise processor exceptions when unaligned accesses
66 unaligned access to be corrected.
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| /linux-6.14.4/Documentation/arch/arm/ |
| D | mem_alignment.rst | 14 unaligned memory access in general. If those access are predictable, you
15 are better to use the macros provided by include/linux/unaligned.h. The
20 trap to SIGBUS any code performing unaligned access (good for debugging bad
27 real bad - it changes the behaviour of all unaligned instructions in user
36 0 A user process performing an unaligned memory access
42 performing the unaligned access. This is of course
47 performing the unaligned access.
59 information on unaligned access occurrences plus the current mode of
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| /linux-6.14.4/net/xdp/ |
| D | xsk_buff_pool.c | 58 bool unaligned = umem->flags & XDP_UMEM_UNALIGNED_CHUNK_FLAG; in xp_create_and_assign_umem() local
63 entries = unaligned ? umem->chunks : 0; in xp_create_and_assign_umem()
83 pool->unaligned = unaligned; in xp_create_and_assign_umem()
105 if (pool->unaligned) in xp_create_and_assign_umem()
414 if (!pool->unaligned) { in xp_init_dma_info()
470 if (pool->unaligned) in xp_dma_map()
509 if (pool->unaligned) { in xp_get_xskb()
536 ok = pool->unaligned ? xp_check_unaligned(pool, &addr) : in __xp_alloc()
596 ok = pool->unaligned ? xp_check_unaligned(pool, &addr) : in xp_alloc_new_from_fq()
704 addr = pool->unaligned ? xp_unaligned_add_offset_to_addr(addr) : addr; in xp_raw_get_data()
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| /linux-6.14.4/arch/alpha/kernel/ |
| D | traps.c | 369 } unaligned[2]; variable
385 unaligned[0].count++; in do_entUna()
386 unaligned[0].va = (unsigned long) va; in do_entUna()
387 unaligned[0].pc = pc; in do_entUna()
694 ++unaligned[1].count; in do_entUnaUser()
695 unaligned[1].va = (unsigned long)va; in do_entUnaUser()
696 unaligned[1].pc = regs->pc - 4; in do_entUnaUser()
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| D | setup.c | 1049 } unaligned[2]; in show_cpuinfo()
1112 unaligned[0].count, unaligned[0].pc, unaligned[0].va, in show_cpuinfo()
1113 unaligned[1].count, unaligned[1].pc, unaligned[1].va, in show_cpuinfo()
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| /linux-6.14.4/arch/riscv/ |
| D | Kconfig | 894 This determines the level of support for unaligned accesses. This
900 bool "Probe for hardware unaligned access support"
904 speed of unaligned accesses. This probing will dynamically determine
905 the speed of unaligned accesses on the underlying system. If unaligned
907 system, the kernel will emulate the unaligned accesses to preserve the
911 bool "Emulate unaligned access where system support is missing"
914 If unaligned memory accesses trap into the kernel as they are not
915 supported by the system, the kernel will emulate the unaligned
917 unaligned accesses, the unaligned accesses are assumed to be slow.
920 bool "Assume the system supports slow unaligned memory accesses"
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| /linux-6.14.4/Documentation/devicetree/bindings/pci/ |
| D | ti-pci.txt | 36 - ti,syscon-unaligned-access: phandle to the syscon DT node. The 1st argument
39 for setting the bit to enable unaligned
54 - ti,syscon-unaligned-access: phandle to the syscon DT node. The 1st argument
57 for setting the bit to enable unaligned
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| /linux-6.14.4/drivers/s390/cio/ |
| D | vfio_ccw_cp.c | 92 struct vfio_device *vdev, int pa_nr, bool unaligned) in page_array_unpin() argument
102 !unaligned) { in page_array_unpin()
131 static int page_array_pin(struct page_array *pa, struct vfio_device *vdev, bool unaligned) in page_array_pin() argument
142 !unaligned) { in page_array_pin()
164 page_array_unpin(pa, vdev, pinned, unaligned); in page_array_pin()
169 static void page_array_unpin_free(struct page_array *pa, struct vfio_device *vdev, bool unaligned) in page_array_unpin_free() argument
171 page_array_unpin(pa, vdev, pa->pa_nr, unaligned); in page_array_unpin_free()
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| /linux-6.14.4/include/net/ |
| D | xsk_buff_pool.h | 83 bool unaligned; member
219 if (xskb->pool->unaligned) in xp_release()
229 if (!pool->unaligned) in xp_get_handle()
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| /linux-6.14.4/Documentation/translations/zh_CN/core-api/ |
| D | unaligned-memory-access.rst | 3 :Original: Documentation/core-api/unaligned-memory-access.rst
178 避免非对齐访问的最简单方法是使用<linux/unaligned.h>头文件提供的get_unaligned()和
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| /linux-6.14.4/arch/parisc/boot/compressed/ |
| D | vmlinux.scr | 7 output_len = . - 4; /* can be at unaligned address */
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| /linux-6.14.4/Documentation/dev-tools/ |
| D | ubsan.rst | 68 Detection of unaligned accesses controlled through the separate option -
70 unaligned accesses (CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS=y). One could
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| /linux-6.14.4/arch/loongarch/lib/ |
| D | Makefile | 7 clear_user.o copy_user.o csum.o dump_tlb.o unaligned.o
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| /linux-6.14.4/arch/arc/lib/ |
| D | Makefile | 12 lib-$(CONFIG_ISA_ARCV2) +=memcpy-archs-unaligned.o
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| D | memcpy-archs.S | 94 ;;; CASE 1: The source is unaligned, off by 1
139 ;;; CASE 2: The source is unaligned, off by 2
180 ;;; CASE 3: The source is unaligned, off by 3
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| D | strchr-700.S | 41 breq r7,0,.Loop ; For speed, we want this branch to be unaligned.
45 breq r12,0,.Loop ; For speed, we want this branch to be unaligned.
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| /linux-6.14.4/arch/loongarch/kernel/ |
| D | module.c | 199 goto unaligned; in apply_r_larch_sop_imm_field()
214 goto unaligned; in apply_r_larch_sop_imm_field()
225 goto unaligned; in apply_r_larch_sop_imm_field()
251 unaligned: in apply_r_larch_sop_imm_field()
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| /linux-6.14.4/drivers/net/ethernet/mellanox/mlx5/core/en/xsk/ |
| D | pool.c | 75 xsk->unaligned = pool->unaligned; in mlx5e_build_xsk_param()
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| /linux-6.14.4/arch/riscv/kernel/ |
| D | Makefile | 78 obj-$(CONFIG_RISCV_PROBE_UNALIGNED_ACCESS) += copy-unaligned.o
79 obj-$(CONFIG_RISCV_PROBE_VECTOR_UNALIGNED_ACCESS) += vec-copy-unaligned.o
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| /linux-6.14.4/drivers/spi/ |
| D | spi-imx.c | 347 int unaligned; in spi_imx_buf_rx_swap() local
350 unaligned = spi_imx->remainder % 4; in spi_imx_buf_rx_swap()
352 if (!unaligned) { in spi_imx_buf_rx_swap()
364 while (unaligned--) { in spi_imx_buf_rx_swap()
366 *(u8 *)spi_imx->rx_buf = (val >> (8 * unaligned)) & 0xff; in spi_imx_buf_rx_swap()
399 int unaligned; in spi_imx_buf_tx_swap() local
402 unaligned = spi_imx->count % 4; in spi_imx_buf_tx_swap()
404 if (!unaligned) { in spi_imx_buf_tx_swap()
414 while (unaligned--) { in spi_imx_buf_tx_swap()
416 val |= *(u8 *)spi_imx->tx_buf << (8 * unaligned); in spi_imx_buf_tx_swap()
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| /linux-6.14.4/drivers/gpu/drm/ci/xfails/ |
| D | mediatek-mt8183-fails.txt | 6 fbdev@unaligned-read,Fail
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| /linux-6.14.4/arch/powerpc/include/asm/ |
| D | emulated_ops.h | 35 struct ppc_emulated_entry unaligned; member
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| /linux-6.14.4/arch/arc/kernel/ |
| D | Makefile | 18 obj-$(CONFIG_ARC_EMUL_UNALIGNED) += unaligned.o
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| /linux-6.14.4/drivers/net/ethernet/broadcom/ |
| D | bgmac.c | 646 ring->unaligned = bgmac_dma_unaligned(bgmac, ring, in bgmac_dma_alloc()
648 if (ring->unaligned) in bgmac_dma_alloc()
671 ring->unaligned = bgmac_dma_unaligned(bgmac, ring, in bgmac_dma_alloc()
673 if (ring->unaligned) in bgmac_dma_alloc()
694 if (!ring->unaligned) in bgmac_dma_init()
700 if (ring->unaligned) in bgmac_dma_init()
712 if (!ring->unaligned) in bgmac_dma_init()
718 if (ring->unaligned) in bgmac_dma_init()
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| /linux-6.14.4/Documentation/translations/zh_CN/process/ |
| D | index.rst | 87 ../core-api/unaligned-memory-access
|