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/linux-6.15/Documentation/translations/zh_CN/mm/
H A Dhighmem.rst64 在本地的kmap区域中采取pagefaults是有效的，除非获取本地映射的上下文由于其他原因不允许
76 虽然它比kmap()快得多，但在高内存的情况下，它对指针的有效性有限制。与kmap()映射相反，
81 kmap()，将页面映射到将被使用的同一线程中，并优先使用kmap_local_page()。
98 * kmap()。这应该被用来对单个页面进行短时间的映射，对抢占或迁移没有限制。它会带来开销，
102 映射变化必须广播到所有CPU（核）上，kmap()还需要在kmap的池被回绕（TLB项用光了，需要从第
104 槽出现。因此，kmap()只能从可抢占的上下文中调用。
107 高内存映射都是短暂的，而且只在一个地方使用。这意味着在这种情况下，kmap()的成本大
108 多被浪费了。kmap()并不是为长期映射而设计的，但是它已经朝着这个方向发展了，在较新
111 在64位系统中，调用kmap_local_page()、kmap_atomic()和kmap()没有实际作用，因为64位
/linux-6.15/tools/perf/util/
H A Dmap.c245 struct kmap *kmap = __map__kmap((struct map *)map); in __map__is_extra_kernel_map() local
247 return kmap && kmap->name[0]; in __map__is_extra_kernel_map()
420 size += sizeof(struct kmap); in map__clone()
530 struct kmap *kmap = __map__kmap(map); in map__rip_2objdump() local
538 if (kmap && is_entry_trampoline(kmap->name) && kmap->kmaps) { in map__rip_2objdump()
624 struct kmap *kmap = __map__kmap(map); in map__kmap() local
626 if (!kmap) in map__kmap()
628 return kmap; in map__kmap()
633 struct kmap *kmap = map__kmap(map); in map__kmaps() local
635 if (!kmap || !kmap->kmaps) { in map__kmaps()
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H A Dsymbol-elf.c1457 static bool ref_reloc_sym_not_found(struct kmap *kmap) in ref_reloc_sym_not_found() argument
1459 return kmap && kmap->ref_reloc_sym && kmap->ref_reloc_sym->name && in ref_reloc_sym_not_found()
1471 static u64 ref_reloc(struct kmap *kmap) in ref_reloc() argument
1473 if (kmap && kmap->ref_reloc_sym && in ref_reloc()
1475 return kmap->ref_reloc_sym->addr - in ref_reloc()
1485 struct maps *kmaps, struct kmap *kmap, in dso__process_kernel_symbol() argument
1542 if (!kmap) in dso__process_kernel_symbol()
1608 struct kmap *kmap = dso__kernel(dso) ? map__kmap(map) : NULL; in dso__load_sym_internal() local
1625 if (kmap && !kmaps) in dso__load_sym_internal()
1690 map__set_reloc(map, kmap->ref_reloc_sym->addr - kmap->ref_reloc_sym->unrelocated_addr); in dso__load_sym_internal()
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H A Dmachine.c1007 struct kmap *kmap; in machine__create_extra_kernel_map() local
1018 kmap = map__kmap(map); in machine__create_extra_kernel_map()
1020 strlcpy(kmap->name, xm->name, KMAP_NAME_LEN); in machine__create_extra_kernel_map()
1074 struct kmap *kmap = __map__kmap(map); in machine__map_x86_64_entry_trampolines_cb() local
1076 if (!kmap || !is_entry_trampoline(kmap->name)) in machine__map_x86_64_entry_trampolines_cb()
1159 struct kmap *kmap; in machine__destroy_kernel_maps() local
1165 kmap = map__kmap(map); in machine__destroy_kernel_maps()
1167 if (kmap && kmap->ref_reloc_sym) { in machine__destroy_kernel_maps()
1168 zfree((char **)&kmap->ref_reloc_sym->name); in machine__destroy_kernel_maps()
1169 zfree(&kmap->ref_reloc_sym); in machine__destroy_kernel_maps()
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H A Dsymbol.c1241 struct kmap *kmap = map__kmap(map); in validate_kcore_addresses() local
1243 if (!kmap) in validate_kcore_addresses()
1246 if (kmap->ref_reloc_sym && kmap->ref_reloc_sym->name) { in validate_kcore_addresses()
1250 kmap->ref_reloc_sym->name, &start)) in validate_kcore_addresses()
1252 if (start != kmap->ref_reloc_sym->addr) in validate_kcore_addresses()
1469 static int kallsyms__delta(struct kmap *kmap, const char *filename, u64 *delta) in kallsyms__delta() argument
1473 if (!kmap->ref_reloc_sym || !kmap->ref_reloc_sym->name) in kallsyms__delta()
1479 *delta = addr - kmap->ref_reloc_sym->addr; in kallsyms__delta()
1486 struct kmap *kmap = map__kmap(map); in __dso__load_kallsyms() local
1492 if (!kmap || !kmap->kmaps) in __dso__load_kallsyms()
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H A Dlock-contention.c104 struct map *kmap; in match_callstack_filter() local
133 sym = machine__find_kernel_symbol(machine, ip, &kmap); in match_callstack_filter()
H A Dbpf_lock_contention.c169 struct map *kmap; in lock_contention_prepare() local
175 &kmap); in lock_contention_prepare()
189 addrs[con->filters->nr_addrs++] = map__unmap_ip(kmap, sym->start); in lock_contention_prepare()
465 struct map *kmap; in lock_contention_get_name() local
498 sym = machine__find_kernel_symbol(machine, key->lock_addr_or_cgroup, &kmap); in lock_contention_get_name()
534 sym = machine__find_kernel_symbol(machine, addr, &kmap); in lock_contention_get_name()
539 offset = map__map_ip(kmap, addr) - sym->start; in lock_contention_get_name()
H A Dmap.h41 struct kmap;
43 struct kmap *__map__kmap(struct map *map);
44 struct kmap *map__kmap(struct map *map);
H A Dmaps.h17 struct kmap { struct
/linux-6.15/drivers/gpu/drm/panthor/
H A Dpanthor_gem.h77 void *kmap; member
112 if (bo->kmap) in panthor_kernel_bo_vmap()
119 bo->kmap = map.vaddr; in panthor_kernel_bo_vmap()
126 if (bo->kmap) { in panthor_kernel_bo_vunmap()
127 struct iosys_map map = IOSYS_MAP_INIT_VADDR(bo->kmap); in panthor_kernel_bo_vunmap()
130 bo->kmap = NULL; in panthor_kernel_bo_vunmap()
H A Dpanthor_fw.c401 bool was_mapped = !!section->mem->kmap; in panthor_fw_init_section_mem()
412 memcpy(section->mem->kmap, section->data.buf, section->data.size); in panthor_fw_init_section_mem()
414 memset(section->mem->kmap + section->data.size, 0, in panthor_fw_init_section_mem()
462 memset(mem->kmap, 0, panthor_kernel_bo_size(mem)); in panthor_fw_alloc_queue_iface_mem()
463 *input = mem->kmap; in panthor_fw_alloc_queue_iface_mem()
464 *output = mem->kmap + SZ_4K; in panthor_fw_alloc_queue_iface_mem()
816 return ptdev->fw->shared_section->mem->kmap + (mcu_va - shared_mem_start); in iface_fw_to_cpu_addr()
837 cs_iface->control = ptdev->fw->shared_section->mem->kmap + iface_offset; in panthor_init_cs_iface()
888 csg_iface->control = ptdev->fw->shared_section->mem->kmap + iface_offset; in panthor_init_csg_iface()
936 if (!ptdev->fw->shared_section->mem->kmap) in panthor_fw_init_ifaces()
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/linux-6.15/drivers/net/ethernet/chelsio/inline_crypto/chtls/
H A Dchtls_hw.c157 cdev->kmap.size = num_key_ctx; in chtls_init_kmap()
158 cdev->kmap.available = bsize; in chtls_init_kmap()
161 if (!cdev->kmap.addr) in chtls_init_kmap()
165 spin_lock_init(&cdev->kmap.lock); in chtls_init_kmap()
180 spin_lock_bh(&cdev->kmap.lock); in get_new_keyid()
181 keyid = find_first_zero_bit(cdev->kmap.addr, cdev->kmap.size); in get_new_keyid()
182 if (keyid < cdev->kmap.size) { in get_new_keyid()
192 spin_unlock_bh(&cdev->kmap.lock); in get_new_keyid()
204 if (!cdev->kmap.addr) in free_tls_keyid()
210 spin_lock_bh(&cdev->kmap.lock); in free_tls_keyid()
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/linux-6.15/tools/perf/arch/x86/util/
H A Devent.c28 struct kmap *kmap; in perf_event__synthesize_extra_kmaps_cb() local
34 kmap = map__kmap(map); in perf_event__synthesize_extra_kmaps_cb()
37 PERF_ALIGN(strlen(kmap->name) + 1, sizeof(u64)) + in perf_event__synthesize_extra_kmaps_cb()
60 strlcpy(event->mmap.filename, kmap->name, PATH_MAX); in perf_event__synthesize_extra_kmaps_cb()
/linux-6.15/arch/m68k/mm/
H A DMakefile9 obj-$(CONFIG_MMU_MOTOROLA) += kmap.o memory.o motorola.o hwtest.o
11 obj-$(CONFIG_MMU_COLDFIRE) += kmap.o memory.o mcfmmu.o
/linux-6.15/Documentation/mm/
H A Dhighmem.rst61 These functions should always be used, whereas kmap_atomic() and kmap() have
70 It's valid to take pagefaults in a local kmap region, unless the context
87 While they are significantly faster than kmap(), for the highmem case they
88 come with restrictions about the pointers validity. Contrary to kmap()
95 therefore try to design their code to avoid the use of kmap() by mapping
131 * kmap(). This function has been deprecated; use kmap_local_page().
146 Mapping changes must be propagated across all the CPUs. kmap() also
147 requires global TLB invalidation when the kmap's pool wraps and it might
149 available. Therefore, kmap() is only callable from preemptible context.
154 kmap() is mostly wasted in such cases. kmap() was not intended for long
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/linux-6.15/drivers/gpu/drm/nouveau/include/nvkm/core/
H A Dmemory.h41 int (*kmap)(struct nvkm_memory *, struct nvkm_memory **); member
68 #define nvkm_memory_kmap(p,i) ((p)->func->kmap ? (p)->func->kmap((p), (i)) : -ENOSYS)
/linux-6.15/drivers/gpu/drm/nouveau/
H A Dnouveau_bo.h19 struct ttm_bo_kmap_obj kmap; member
98 &nvbo->kmap, &is_iomem); in nvbo_kmap_obj_iovirtual()
/linux-6.15/include/linux/
H A Dhighmem-internal.h40 static inline void *kmap(struct page *page) in kmap() function
162 static inline void *kmap(struct page *page) in kmap() function
/linux-6.15/drivers/gpu/drm/xe/
H A Dxe_bo_types.h48 struct ttm_bo_kmap_obj kmap; member
/linux-6.15/mm/
H A Dhighmem.c577 void *kmap; in __kmap_local_page_prot() local
588 kmap = arch_kmap_local_high_get(page); in __kmap_local_page_prot()
589 if (kmap) in __kmap_local_page_prot()
590 return kmap; in __kmap_local_page_prot()
/linux-6.15/fs/freevxfs/
H A Dvxfs_subr.c51 kmap(pp); in vxfs_get_page()
/linux-6.15/drivers/gpu/drm/loongson/
H A Dlsdc_ttm.h35 struct ttm_bo_kmap_obj kmap; member
H A Dlsdc_ttm.c370 err = ttm_bo_kmap(tbo, 0, PFN_UP(lsdc_bo_size(lbo)), &lbo->kmap); in lsdc_bo_kmap()
376 lbo->kptr = ttm_kmap_obj_virtual(&lbo->kmap, &lbo->is_iomem); in lsdc_bo_kmap()
387 ttm_bo_kunmap(&lbo->kmap); in lsdc_bo_kunmap()
/linux-6.15/arch/sh/mm/
H A DMakefile19 mmu-$(CONFIG_MMU) := extable_32.o fault.o ioremap.o kmap.o \
/linux-6.15/fs/vboxsf/
H A Dfile.c283 buf = kmap(page); in vboxsf_writepage()
316 buf = kmap(&folio->page); in vboxsf_write_end()

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