€•=      Œsphinx.addnodes”Œdocument”“”)”}”(Œ	rawsource”Œ ”Œchildren”]”(Œtranslations”ŒLanguagesNode”“”)”}”(hhh]”(h Œpending_xref”“”)”}”(hhh]”Œdocutils.nodes”ŒText”“”ŒChinese (Simplified)”…””}”Œparent”hsbaŒ
attributes”}”(Œids”]”Œclasses”]”Œnames”]”Œdupnames”]”Œbackrefs”]”Œ	refdomain”Œstd”Œreftype”Œdoc”Œ	reftarget”Œ /translations/zh_CN/arch/s390/mm”Œmodname”NŒ	classname”NŒrefexplicit”ˆuŒtagname”hhhubh)”}”(hhh]”hŒChinese (Traditional)”…””}”hh2sbah}”(h]”h ]”h"]”h$]”h&]”Œ	refdomain”h)Œreftype”h+Œ	reftarget”Œ /translations/zh_TW/arch/s390/mm”Œmodname”NŒ	classname”NŒrefexplicit”ˆuh1hhhubh)”}”(hhh]”hŒItalian”…””}”hhFsbah}”(h]”h ]”h"]”h$]”h&]”Œ	refdomain”h)Œreftype”h+Œ	reftarget”Œ /translations/it_IT/arch/s390/mm”Œmodname”NŒ	classname”NŒrefexplicit”ˆuh1hhhubh)”}”(hhh]”hŒJapanese”…””}”hhZsbah}”(h]”h ]”h"]”h$]”h&]”Œ	refdomain”h)Œreftype”h+Œ	reftarget”Œ /translations/ja_JP/arch/s390/mm”Œmodname”NŒ	classname”NŒrefexplicit”ˆuh1hhhubh)”}”(hhh]”hŒKorean”…””}”hhnsbah}”(h]”h ]”h"]”h$]”h&]”Œ	refdomain”h)Œreftype”h+Œ	reftarget”Œ /translations/ko_KR/arch/s390/mm”Œmodname”NŒ	classname”NŒrefexplicit”ˆuh1hhhubh)”}”(hhh]”hŒSpanish”…””}”hh‚sbah}”(h]”h ]”h"]”h$]”h&]”Œ	refdomain”h)Œreftype”h+Œ	reftarget”Œ /translations/sp_SP/arch/s390/mm”Œmodname”NŒ	classname”NŒrefexplicit”ˆuh1hhhubeh}”(h]”h ]”h"]”h$]”h&]”Œcurrent_language”ŒEnglish”uh1h
hhŒ	_document”hŒsource”NŒline”NubhŒcomment”“”)”}”(hŒ SPDX-License-Identifier: GPL-2.0”h]”hŒ SPDX-License-Identifier: GPL-2.0”…””}”hh£sbah}”(h]”h ]”h"]”h$]”h&]”Œ	xml:space”Œpreserve”uh1h¡hhhžhhŸŒ:/var/lib/git/docbuild/linux/Documentation/arch/s390/mm.rst”h KubhŒsection”“”)”}”(hhh]”(hŒtitle”“”)”}”(hŒMemory Management”h]”hŒMemory Management”…””}”(hh»hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h¹hh¶hžhhŸh³h Kubhµ)”}”(hhh]”(hº)”}”(hŒVirtual memory layout”h]”hŒVirtual memory layout”…””}”(hhÌhžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1h¹hhÉhžhhŸh³h KubhŒnote”“”)”}”(hXã  - Some aspects of the virtual memory layout setup are not
  clarified (number of page levels, alignment, DMA memory).

- Unused gaps in the virtual memory layout could be present
  or not - depending on how partucular system is configured.
  No page tables are created for the unused gaps.

- The virtual memory regions are tracked or untracked by KASAN
  instrumentation, as well as the KASAN shadow memory itself is
  created only when CONFIG_KASAN configuration option is enabled.”h]”hŒbullet_list”“”)”}”(hhh]”(hŒ	list_item”“”)”}”(hŒrSome aspects of the virtual memory layout setup are not
clarified (number of page levels, alignment, DMA memory).
”h]”hŒ	paragraph”“”)”}”(hŒqSome aspects of the virtual memory layout setup are not
clarified (number of page levels, alignment, DMA memory).”h]”hŒqSome aspects of the virtual memory layout setup are not
clarified (number of page levels, alignment, DMA memory).”…””}”(hhíhžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hëhŸh³h Khhçubah}”(h]”h ]”h"]”h$]”h&]”uh1håhhâubhæ)”}”(hŒ¥Unused gaps in the virtual memory layout could be present
or not - depending on how partucular system is configured.
No page tables are created for the unused gaps.
”h]”hì)”}”(hŒ¤Unused gaps in the virtual memory layout could be present
or not - depending on how partucular system is configured.
No page tables are created for the unused gaps.”h]”hŒ¤Unused gaps in the virtual memory layout could be present
or not - depending on how partucular system is configured.
No page tables are created for the unused gaps.”…””}”(hj  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hëhŸh³h Khj  ubah}”(h]”h ]”h"]”h$]”h&]”uh1håhhâubhæ)”}”(hŒºThe virtual memory regions are tracked or untracked by KASAN
instrumentation, as well as the KASAN shadow memory itself is
created only when CONFIG_KASAN configuration option is enabled.”h]”hì)”}”(hŒºThe virtual memory regions are tracked or untracked by KASAN
instrumentation, as well as the KASAN shadow memory itself is
created only when CONFIG_KASAN configuration option is enabled.”h]”hŒºThe virtual memory regions are tracked or untracked by KASAN
instrumentation, as well as the KASAN shadow memory itself is
created only when CONFIG_KASAN configuration option is enabled.”…””}”(hj  hžhhŸNh Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hëhŸh³h Khj  ubah}”(h]”h ]”h"]”h$]”h&]”uh1håhhâubeh}”(h]”h ]”h"]”h$]”h&]”Œbullet”Œ-”uh1hàhŸh³h KhhÜubah}”(h]”h ]”h"]”h$]”h&]”uh1hÚhhÉhžhhŸNh NubhŒliteral_block”“”)”}”(hX!  =============================================================================
|    Physical      |    Virtual       | VM area description
=============================================================================
+- 0 --------------+- 0 --------------+
|                  | S390_lowcore     | Low-address memory
|                  +- 8 KB -----------+
|                  |                  |
|                  |                  |
|                  | ... unused gap   | KASAN untracked
|                  |                  |
+- AMODE31_START --+- AMODE31_START --+ .amode31 rand. phys/virt start
|.amode31 text/data|.amode31 text/data| KASAN untracked
+- AMODE31_END ----+- AMODE31_END ----+ .amode31 rand. phys/virt end (<2GB)
|                  |                  |
|                  |                  |
+- __kaslr_offset_phys                | kernel rand. phys start
|                  |                  |
| kernel text/data |                  |
|                  |                  |
+------------------+                  | kernel phys end
|                  |                  |
|                  |                  |
|                  |                  |
|                  |                  |
+- ident_map_size -+                  |
                   |                  |
                   |  ... unused gap  | KASAN untracked
                   |                  |
                   +- __identity_base + identity mapping start (>= 2GB)
                   |                  |
                   | identity         | phys == virt - __identity_base
                   | mapping          | virt == phys + __identity_base
                   |                  |
                   |                  | KASAN tracked
                   |                  |
                   |                  |
                   |                  |
                   |                  |
                   |                  |
                   |                  |
                   |                  |
                   |                  |
                   |                  |
                   |                  |
                   |                  |
                   |                  |
                   |                  |
                   |                  |
                   |                  |
                   +---- vmemmap -----+ 'struct page' array start
                   |                  |
                   | virtually mapped |
                   | memory map       | KASAN untracked
                   |                  |
                   +- __abs_lowcore --+
                   |                  |
                   | Absolute Lowcore | KASAN untracked
                   |                  |
                   +- __memcpy_real_area
                   |                  |
                   |  Real Memory Copy| KASAN untracked
                   |                  |
                   +- VMALLOC_START --+ vmalloc area start
                   |                  | KASAN untracked or
                   |  vmalloc area    | KASAN shallowly populated in case
                   |                  |       CONFIG_KASAN_VMALLOC=y
                   +- MODULES_VADDR --+ modules area start
                   |                  | KASAN allocated per module or
                   |  modules area    | KASAN shallowly populated in case
                   |                  |       CONFIG_KASAN_VMALLOC=y
                   +- __kaslr_offset -+ kernel rand. virt start
                   |                  | KASAN tracked
                   | kernel text/data | phys == (kvirt - __kaslr_offset) +
                   |                  |         __kaslr_offset_phys
                   +- kernel .bss end + kernel rand. virt end
                   |                  |
                   |  ... unused gap  | KASAN untracked
                   |                  |
                   +------------------+ UltraVisor Secure Storage limit
                   |                  |
                   |  ... unused gap  | KASAN untracked
                   |                  |
                   +KASAN_SHADOW_START+ KASAN shadow memory start
                   |                  |
                   |   KASAN shadow   | KASAN untracked
                   |                  |
                   +------------------+ ASCE limit”h]”hX!  =============================================================================
|    Physical      |    Virtual       | VM area description
=============================================================================
+- 0 --------------+- 0 --------------+
|                  | S390_lowcore     | Low-address memory
|                  +- 8 KB -----------+
|                  |                  |
|                  |                  |
|                  | ... unused gap   | KASAN untracked
|                  |                  |
+- AMODE31_START --+- AMODE31_START --+ .amode31 rand. phys/virt start
|.amode31 text/data|.amode31 text/data| KASAN untracked
+- AMODE31_END ----+- AMODE31_END ----+ .amode31 rand. phys/virt end (<2GB)
|                  |                  |
|                  |                  |
+- __kaslr_offset_phys                | kernel rand. phys start
|                  |                  |
| kernel text/data |                  |
|                  |                  |
+------------------+                  | kernel phys end
|                  |                  |
|                  |                  |
|                  |                  |
|                  |                  |
+- ident_map_size -+                  |
                   |                  |
                   |  ... unused gap  | KASAN untracked
                   |                  |
                   +- __identity_base + identity mapping start (>= 2GB)
                   |                  |
                   | identity         | phys == virt - __identity_base
                   | mapping          | virt == phys + __identity_base
                   |                  |
                   |                  | KASAN tracked
                   |                  |
                   |                  |
                   |                  |
                   |                  |
                   |                  |
                   |                  |
                   |                  |
                   |                  |
                   |                  |
                   |                  |
                   |                  |
                   |                  |
                   |                  |
                   |                  |
                   |                  |
                   +---- vmemmap -----+ 'struct page' array start
                   |                  |
                   | virtually mapped |
                   | memory map       | KASAN untracked
                   |                  |
                   +- __abs_lowcore --+
                   |                  |
                   | Absolute Lowcore | KASAN untracked
                   |                  |
                   +- __memcpy_real_area
                   |                  |
                   |  Real Memory Copy| KASAN untracked
                   |                  |
                   +- VMALLOC_START --+ vmalloc area start
                   |                  | KASAN untracked or
                   |  vmalloc area    | KASAN shallowly populated in case
                   |                  |       CONFIG_KASAN_VMALLOC=y
                   +- MODULES_VADDR --+ modules area start
                   |                  | KASAN allocated per module or
                   |  modules area    | KASAN shallowly populated in case
                   |                  |       CONFIG_KASAN_VMALLOC=y
                   +- __kaslr_offset -+ kernel rand. virt start
                   |                  | KASAN tracked
                   | kernel text/data | phys == (kvirt - __kaslr_offset) +
                   |                  |         __kaslr_offset_phys
                   +- kernel .bss end + kernel rand. virt end
                   |                  |
                   |  ... unused gap  | KASAN untracked
                   |                  |
                   +------------------+ UltraVisor Secure Storage limit
                   |                  |
                   |  ... unused gap  | KASAN untracked
                   |                  |
                   +KASAN_SHADOW_START+ KASAN shadow memory start
                   |                  |
                   |   KASAN shadow   | KASAN untracked
                   |                  |
                   +------------------+ ASCE limit”…””}”hjA  sbah}”(h]”h ]”h"]”h$]”h&]”h±h²uh1j?  hŸh³h KhhÉhžhubeh}”(h]”Œvirtual-memory-layout”ah ]”h"]”Œvirtual memory layout”ah$]”h&]”uh1h´hh¶hžhhŸh³h Kubeh}”(h]”Œmemory-management”ah ]”h"]”Œmemory management”ah$]”h&]”uh1h´hhhžhhŸh³h Kubeh}”(h]”h ]”h"]”h$]”h&]”Œsource”h³uh1hŒcurrent_source”NŒcurrent_line”NŒsettings”Œdocutils.frontend”ŒValues”“”)”}”(h¹NŒ	generator”NŒ	datestamp”NŒsource_link”NŒ
source_url”NŒtoc_backlinks”Œentry”Œfootnote_backlinks”KŒsectnum_xform”KŒstrip_comments”NŒstrip_elements_with_classes”NŒstrip_classes”NŒreport_level”KŒ
halt_level”KŒexit_status_level”KŒdebug”NŒwarning_stream”NŒ	traceback”ˆŒinput_encoding”Œ	utf-8-sig”Œinput_encoding_error_handler”Œstrict”Œoutput_encoding”Œutf-8”Œoutput_encoding_error_handler”j‚  Œerror_encoding”Œutf-8”Œerror_encoding_error_handler”Œbackslashreplace”Œlanguage_code”Œen”Œrecord_dependencies”NŒconfig”NŒ	id_prefix”hŒauto_id_prefix”Œid”Œdump_settings”NŒdump_internals”NŒdump_transforms”NŒdump_pseudo_xml”NŒexpose_internals”NŒstrict_visitor”NŒ_disable_config”NŒ_source”h³Œ_destination”NŒ_config_files”]”Œ7/var/lib/git/docbuild/linux/Documentation/docutils.conf”aŒfile_insertion_enabled”ˆŒraw_enabled”KŒline_length_limit”M'Œpep_references”NŒpep_base_url”Œhttps://peps.python.org/”Œpep_file_url_template”Œpep-%04d”Œrfc_references”NŒrfc_base_url”Œ&https://datatracker.ietf.org/doc/html/”Œ	tab_width”KŒtrim_footnote_reference_space”‰Œsyntax_highlight”Œlong”Œsmart_quotes”ˆŒsmartquotes_locales”]”Œcharacter_level_inline_markup”‰Œdoctitle_xform”‰Œdocinfo_xform”KŒsectsubtitle_xform”‰Œimage_loading”Œlink”Œembed_stylesheet”‰Œcloak_email_addresses”ˆŒsection_self_link”‰Œenv”NubŒreporter”NŒindirect_targets”]”Œsubstitution_defs”}”Œsubstitution_names”}”Œrefnames”}”Œrefids”}”Œnameids”}”(j\  jY  jT  jQ  uŒ	nametypes”}”(j\  ‰jT  ‰uh}”(jY  h¶jQ  hÉuŒfootnote_refs”}”Œcitation_refs”}”Œautofootnotes”]”Œautofootnote_refs”]”Œsymbol_footnotes”]”Œsymbol_footnote_refs”]”Œ	footnotes”]”Œ	citations”]”Œautofootnote_start”KŒsymbol_footnote_start”K Œ
id_counter”Œcollections”ŒCounter”“”}”…”R”Œparse_messages”]”Œtransform_messages”]”Œtransformer”NŒinclude_log”]”Œ
decoration”Nhžhub.