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/linux-6.15/Documentation/core-api/
H A Dunaligned-memory-access.rst15 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
59 - Some architectures are able to perform unaligned memory accesses
66 unaligned access to be corrected.
76 Code that does not cause unaligned access
136 lead to unaligned accesses when accessing fields that do not satisfy
145 Code that causes unaligned access
173 (Hint: it'd be an unaligned access.)
[all …]
/linux-6.15/Documentation/arch/arm/
H A Dmem_alignment.rst14 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
/linux-6.15/net/xdp/
H A Dxsk_buff_pool.c60 bool unaligned = umem->flags & XDP_UMEM_UNALIGNED_CHUNK_FLAG; in xp_create_and_assign_umem() local
65 entries = unaligned ? umem->chunks : 0; in xp_create_and_assign_umem()
85 pool->unaligned = unaligned; in xp_create_and_assign_umem()
108 if (pool->unaligned) in xp_create_and_assign_umem()
418 if (!pool->unaligned) { in xp_init_dma_info()
474 if (pool->unaligned) in xp_dma_map()
513 if (pool->unaligned) { in xp_get_xskb()
540 ok = pool->unaligned ? xp_check_unaligned(pool, &addr) : in __xp_alloc()
600 ok = pool->unaligned ? xp_check_unaligned(pool, &addr) : in xp_alloc_new_from_fq()
708 return pool->unaligned ? xp_unaligned_add_offset_to_addr(addr) : addr; in __xp_raw_get_addr()
/linux-6.15/arch/alpha/kernel/
H A Dtraps.c369 } 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()
H A Dsetup.c1049 } unaligned[2]; in show_cpuinfo() local
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()
/linux-6.15/Documentation/devicetree/bindings/pci/
H A Dti-pci.txt36 - 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
/linux-6.15/drivers/s390/cio/
H A Dvfio_ccw_cp.c92 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()
/linux-6.15/arch/riscv/
H A DKconfig931 bool "Probe for hardware unaligned access support"
936 the speed of unaligned accesses on the underlying system. If unaligned
942 bool "Emulate unaligned access where system support is missing"
946 supported by the system, the kernel will emulate the unaligned
948 unaligned accesses, the unaligned accesses are assumed to be slow.
956 that do not support unaligned memory accesses.
968 support efficient unaligned memory accesses.
973 prompt "Vector unaligned Accesses Support"
983 bool "Probe speed of vector unaligned accesses"
998 that do not support unaligned memory accesses.
[all …]
/linux-6.15/include/net/
H A Dxsk_buff_pool.h85 bool unaligned; member
229 if (xskb->pool->unaligned) in xp_release()
239 if (!pool->unaligned) in xp_get_handle()
/linux-6.15/Documentation/translations/zh_CN/core-api/
H A Dunaligned-memory-access.rst3 :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
/linux-6.15/arch/parisc/boot/compressed/
H A Dvmlinux.scr7 output_len = . - 4; /* can be at unaligned address */
/linux-6.15/Documentation/dev-tools/
H A Dubsan.rst68 Detection of unaligned accesses controlled through the separate option -
70 unaligned accesses (CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS=y). One could
/linux-6.15/Documentation/devicetree/bindings/mtd/
H A Dmtd-physmap.yaml84 no-unaligned-direct-access:
90 with JFFS2 usage, as the local bus (LPB) doesn't support unaligned
92 "no-unaligned-direct-access", the flash will not be exposed directly to
/linux-6.15/arch/loongarch/lib/
H A DMakefile7 clear_user.o copy_user.o csum.o dump_tlb.o unaligned.o
/linux-6.15/arch/arc/lib/
H A DMakefile12 lib-$(CONFIG_ISA_ARCV2) +=memcpy-archs-unaligned.o
H A Dmemcpy-archs.S94 ;;; CASE 1: The source is unaligned, off by 1
139 ;;; CASE 2: The source is unaligned, off by 2
180 ;;; CASE 3: The source is unaligned, off by 3
H A Dstrchr-700.S41 breq r7,0,.Loop ; For speed, we want this branch to be unaligned.
45 breq r12,0,.Loop ; For speed, we want this branch to be unaligned.
/linux-6.15/Documentation/netlink/specs/
H A Dovs_datapath.yaml26 name: unaligned
27 doc: Allow last Netlink attribute to be unaligned
/linux-6.15/drivers/net/ethernet/mellanox/mlx5/core/en/xsk/
H A Dpool.c75 xsk->unaligned = pool->unaligned; in mlx5e_build_xsk_param()
/linux-6.15/arch/riscv/kernel/
H A DMakefile78 obj-$(CONFIG_RISCV_PROBE_UNALIGNED_ACCESS) += copy-unaligned.o
79 obj-$(CONFIG_RISCV_PROBE_VECTOR_UNALIGNED_ACCESS) += vec-copy-unaligned.o
/linux-6.15/arch/loongarch/kernel/
H A Dmodule.c199 goto unaligned; in apply_r_larch_sop_imm_field()
214 goto unaligned; in apply_r_larch_sop_imm_field()
225 goto unaligned; in apply_r_larch_sop_imm_field()
251 unaligned: in apply_r_larch_sop_imm_field()
/linux-6.15/drivers/gpu/drm/ci/xfails/
H A Di915-whl-flakes.txt13 gen9_exec_parse@unaligned-access
/linux-6.15/drivers/spi/
H A Dspi-imx.c347 int unaligned; in spi_imx_buf_rx_swap() local
350 unaligned = spi_imx->remainder % 4; in spi_imx_buf_rx_swap()
352 if (!unaligned) { in spi_imx_buf_rx_swap()
364 while (unaligned--) { in spi_imx_buf_rx_swap()
366 *(u8 *)spi_imx->rx_buf = (val >> (8 * unaligned)) & 0xff; in spi_imx_buf_rx_swap()
399 int unaligned; in spi_imx_buf_tx_swap() local
402 unaligned = spi_imx->count % 4; in spi_imx_buf_tx_swap()
404 if (!unaligned) { in spi_imx_buf_tx_swap()
414 while (unaligned--) { in spi_imx_buf_tx_swap()
416 val |= *(u8 *)spi_imx->tx_buf << (8 * unaligned); in spi_imx_buf_tx_swap()
/linux-6.15/arch/powerpc/include/asm/
H A Demulated_ops.h35 struct ppc_emulated_entry unaligned; member
/linux-6.15/arch/arc/kernel/
H A DMakefile18 obj-$(CONFIG_ARC_EMUL_UNALIGNED) += unaligned.o

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