€•o?      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Portuguese (Brazilian)”…””}”hh‚sbah}”(h]”h ]”h"]”h$]”h&]”Œ	refdomain”h)Œreftype”h+Œ	reftarget”Œ /translations/pt_BR/arch/s390/mm”Œmodname”NŒ	classname”NŒrefexplicit”ˆuh1hhhubh)”}”(hhh]”hŒSpanish”…””}”hh–sbah}”(h]”h ]”h"]”h$]”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”uh1hµhhh²hh³Œ:/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hÏh²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hÍhhÊh²hh³hÇh´KubhÉ)”}”(hhh]”(hÎ)”}”(hŒVirtual memory layout”h]”hŒVirtual memory layout”…””}”(hhàh²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hÍhhÝh²hh³hÇh´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
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”h]”hŒ	paragraph”“”)”}”(hŒqSome aspects of the virtual memory layout setup are not
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or not - depending on how partucular system is configured.
No page tables are created for the unused gaps.
”h]”j   )”}”(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  h²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hÿh³hÇh´Khj  ubah}”(h]”h ]”h"]”h$]”h&]”uh1hùhhöubhú)”}”(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   )”}”(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j1  h²hh³Nh´Nubah}”(h]”h ]”h"]”h$]”h&]”uh1hÿh³hÇh´Khj-  ubah}”(h]”h ]”h"]”h$]”h&]”uh1hùhhöubeh}”(h]”h ]”h"]”h$]”h&]”Œbullet”Œ-”uh1hôh³hÇh´Khhðubah}”(h]”h ]”h"]”h$]”h&]”uh1hîhhÝh²hh³Nh´NubhŒliteral_block”“”)”}”(hXæ  =============================================================================
|    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
                   |                  |
                   | CONFIG_ILLEGAL_POINTER_VALUE causes memory access fault
                   |                  |
                   +------------------+”h]”hXæ  =============================================================================
|    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
                   |                  |
                   | CONFIG_ILLEGAL_POINTER_VALUE causes memory access fault
                   |                  |
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