diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2015-04-18 11:10:49 -0400 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2015-04-18 11:10:49 -0400 |
commit | d6a24d0640d609138a4e40a4ce9fd9fe7859e24c (patch) | |
tree | aa40fb7f5d03dc605634fb4030afd8798bd6bc0b /Documentation/zh_CN/arm64/legacy_instructions.txt | |
parent | 1f5014d6a77513fa7cefe30eb7791d5856c04384 (diff) | |
parent | 197175427a221fe3200f7727ea35e261727e7228 (diff) |
Merge tag 'docs-for-linus' of git://git.lwn.net/linux-2.6
Pull documentation updates from Jonathan Corbet:
"Numerous fixes, the overdue removal of the i2o docs, some new Chinese
translations, and, hopefully, the README fix that will end the flow of
identical patches to that file"
* tag 'docs-for-linus' of git://git.lwn.net/linux-2.6: (34 commits)
Documentation/memcg: update memcg/kmem status
Documentation: blackfin: Makefile: Typo building issue
Documentation/vm/pagemap.txt: correct location of page-types tool
Documentation/memory-barriers.txt: typo fix
doc: Add guest_nice column to example output of `cat /proc/stat'
Documentation/kernel-parameters: Move "eagerfpu" to its right place
Documentation: gpio: Update ACPI part of the document to mention _DSD
docs/completion.txt: Various tweaks and corrections
doc: completion: context, scope and language fixes
Documentation:Update Documentation/zh_CN/arm64/memory.txt
Documentation:Update Documentation/zh_CN/arm64/booting.txt
Documentation: Chinese translation of arm64/legacy_instructions.txt
DocBook media: fix broken EIA hyperlink
Documentation: tweak the maintainers entry
README: Change gzip/bzip2 to xz compression format
README: Update version number reference
doc:pci: Fix typo in Documentation/PCI
Documentation: drm: Use '->' when describing access through pointers.
Documentation: Remove mentioning of block barriers
Documentation/email-clients.txt: Fix one grammar mistake, add extra info about TB
...
Diffstat (limited to 'Documentation/zh_CN/arm64/legacy_instructions.txt')
-rw-r--r-- | Documentation/zh_CN/arm64/legacy_instructions.txt | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/Documentation/zh_CN/arm64/legacy_instructions.txt b/Documentation/zh_CN/arm64/legacy_instructions.txt new file mode 100644 index 000000000000..68362a1ab717 --- /dev/null +++ b/Documentation/zh_CN/arm64/legacy_instructions.txt @@ -0,0 +1,72 @@ +Chinese translated version of Documentation/arm64/legacy_instructions.txt + +If you have any comment or update to the content, please contact the +original document maintainer directly. However, if you have a problem +communicating in English you can also ask the Chinese maintainer for +help. Contact the Chinese maintainer if this translation is outdated +or if there is a problem with the translation. + +Maintainer: Punit Agrawal <punit.agrawal@arm.com> + Suzuki K. Poulose <suzuki.poulose@arm.com> +Chinese maintainer: Fu Wei <wefu@redhat.com> +--------------------------------------------------------------------- +Documentation/arm64/legacy_instructions.txt 的中文翻译 + +如果想评论或更新本文的内容,请直接联系原文档的维护者。如果你使用英文 +交流有困难的话,也可以向中文版维护者求助。如果本翻译更新不及时或者翻 +译存在问题,请联系中文版维护者。 + +本文翻译提交时的 Git 检出点为: bc465aa9d045feb0e13b4a8f32cc33c1943f62d6 + +英文版维护者: Punit Agrawal <punit.agrawal@arm.com> + Suzuki K. Poulose <suzuki.poulose@arm.com> +中文版维护者: 傅炜 Fu Wei <wefu@redhat.com> +中文版翻译者: 傅炜 Fu Wei <wefu@redhat.com> +中文版校译者: 傅炜 Fu Wei <wefu@redhat.com> + +以下为正文 +--------------------------------------------------------------------- +Linux 内核在 arm64 上的移植提供了一个基础框架,以支持构架中正在被淘汰或已废弃指令的模拟执行。 +这个基础框架的代码使用未定义指令钩子(hooks)来支持模拟。如果指令存在,它也允许在硬件中启用该指令。 + +模拟模式可通过写 sysctl 节点(/proc/sys/abi)来控制。 +不同的执行方式及 sysctl 节点的相应值,解释如下: + +* Undef(未定义) + 值: 0 + 产生未定义指令终止异常。它是那些构架中已废弃的指令,如 SWP,的默认处理方式。 + +* Emulate(模拟) + 值: 1 + 使用软件模拟方式。为解决软件迁移问题,这种模拟指令模式的使用是被跟踪的,并会发出速率限制警告。 + 它是那些构架中正在被淘汰的指令,如 CP15 barriers(隔离指令),的默认处理方式。 + +* Hardware Execution(硬件执行) + 值: 2 + 虽然标记为正在被淘汰,但一些实现可能提供硬件执行这些指令的使能/禁用操作。 + 使用硬件执行一般会有更好的性能,但将无法收集运行时对正被淘汰指令的使用统计数据。 + +默认执行模式依赖于指令在构架中状态。正在被淘汰的指令应该以模拟(Emulate)作为默认模式, +而已废弃的指令必须默认使用未定义(Undef)模式 + +注意:指令模拟可能无法应对所有情况。更多详情请参考单独的指令注释。 + +受支持的遗留指令 +------------- +* SWP{B} +节点: /proc/sys/abi/swp +状态: 已废弃 +默认执行方式: Undef (0) + +* CP15 Barriers +节点: /proc/sys/abi/cp15_barrier +状态: 正被淘汰,不推荐使用 +默认执行方式: Emulate (1) + +* SETEND +节点: /proc/sys/abi/setend +状态: 正被淘汰,不推荐使用 +默认执行方式: Emulate (1)* +注:为了使能这个特性,系统中的所有 CPU 必须在 EL0 支持混合字节序。 +如果一个新的 CPU (不支持混合字节序) 在使能这个特性后被热插入系统, +在应用中可能会出现不可预期的结果。 |