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Commit 8d13be53 authored by Jonathan Corbet's avatar Jonathan Corbet
Browse files

Merge branch 'core/documentation' of... 

Merge branch 'core/documentation' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip into docs-next

A week late but I managed to complete it all and moved it into Git, for better
structure and easy pulling.

Changes relative to the last submission:

  - Added higher level subsystem directories to collect features by
    subsystem:

      triton:~/tip> ls Documentation/features/
      arch-support.txt  core  debug  io  lib  list-arch.sh  locking  perf  sched  seccomp  time  vm

    each subsystem directory contains the feature directories. For example locking
    has:

      triton:~/tip> ls Documentation/features/locking/
      cmpxchg-local  lockdep  queued-rwlocks  queued-spinlocks  rwsem-optimized

    It's all pretty straightforward to navigate. Advantages are better
    visualization, plus git log is able to list changes per subsystem.

  - Prettified the visualization some more.

  - Improved/corrected the support matrices based on feedback to earlier submissions.

  - Updated the support matrices to today's linux-next, so that by the time this
    shows up in upstream in the next merge window it's really recent.
    Most notably there's a new architecture in linux-next (h8300).

This structure should address all feedback that I got and should minimize the
maintenance overhead (chance of conflicts).
parents d4a4f75c 669f6f96

Documentation/features/arch-support.txt

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For generic kernel features that need architecture support, the

arch-support.txt file in each feature directory shows the arch

support matrix, for all upstream Linux architectures.



The meaning of entries in the tables is:



    | ok |  # feature supported by the architecture

    |TODO|  # feature not yet supported by the architecture

    | .. |  # feature cannot be supported by the hardware

Documentation/features/core/BPF-JIT/arch-support.txt

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#

# Feature name:          BPF-JIT

#         Kconfig:       HAVE_BPF_JIT

#         description:   arch supports BPF JIT optimizations

#

    -----------------------

    |         arch |status|

    -----------------------

    |       alpha: | TODO |

    |         arc: | TODO |

    |         arm: |  ok  |

    |       arm64: |  ok  |

    |       avr32: | TODO |

    |    blackfin: | TODO |

    |         c6x: | TODO |

    |        cris: | TODO |

    |         frv: | TODO |

    |       h8300: | TODO |

    |     hexagon: | TODO |

    |        ia64: | TODO |

    |        m32r: | TODO |

    |        m68k: | TODO |

    |       metag: | TODO |

    |  microblaze: | TODO |

    |        mips: |  ok  |

    |     mn10300: | TODO |

    |       nios2: | TODO |

    |    openrisc: | TODO |

    |      parisc: | TODO |

    |     powerpc: |  ok  |

    |        s390: |  ok  |

    |       score: | TODO |

    |          sh: | TODO |

    |       sparc: |  ok  |

    |        tile: | TODO |

    |          um: | TODO |

    |   unicore32: | TODO |

    |         x86: |  ok  |

    |      xtensa: | TODO |

    -----------------------

Documentation/features/core/generic-idle-thread/arch-support.txt

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#

# Feature name:          generic-idle-thread

#         Kconfig:       GENERIC_SMP_IDLE_THREAD

#         description:   arch makes use of the generic SMP idle thread facility

#

    -----------------------

    |         arch |status|

    -----------------------

    |       alpha: |  ok  |

    |         arc: |  ok  |

    |         arm: |  ok  |

    |       arm64: |  ok  |

    |       avr32: | TODO |

    |    blackfin: |  ok  |

    |         c6x: | TODO |

    |        cris: | TODO |

    |         frv: | TODO |

    |       h8300: | TODO |

    |     hexagon: |  ok  |

    |        ia64: |  ok  |

    |        m32r: | TODO |

    |        m68k: | TODO |

    |       metag: |  ok  |

    |  microblaze: | TODO |

    |        mips: |  ok  |

    |     mn10300: | TODO |

    |       nios2: | TODO |

    |    openrisc: | TODO |

    |      parisc: |  ok  |

    |     powerpc: |  ok  |

    |        s390: |  ok  |

    |       score: | TODO |

    |          sh: |  ok  |

    |       sparc: |  ok  |

    |        tile: | TODO |

    |          um: | TODO |

    |   unicore32: | TODO |

    |         x86: |  ok  |

    |      xtensa: |  ok  |

    -----------------------

Documentation/features/core/jump-labels/arch-support.txt

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#

# Feature name:          jump-labels

#         Kconfig:       HAVE_ARCH_JUMP_LABEL

#         description:   arch supports live patched, high efficiency branches

#

    -----------------------

    |         arch |status|

    -----------------------

    |       alpha: | TODO |

    |         arc: | TODO |

    |         arm: |  ok  |

    |       arm64: |  ok  |

    |       avr32: | TODO |

    |    blackfin: | TODO |

    |         c6x: | TODO |

    |        cris: | TODO |

    |         frv: | TODO |

    |       h8300: | TODO |

    |     hexagon: | TODO |

    |        ia64: | TODO |

    |        m32r: | TODO |

    |        m68k: | TODO |

    |       metag: | TODO |

    |  microblaze: | TODO |

    |        mips: |  ok  |

    |     mn10300: | TODO |

    |       nios2: | TODO |

    |    openrisc: | TODO |

    |      parisc: | TODO |

    |     powerpc: |  ok  |

    |        s390: |  ok  |

    |       score: | TODO |

    |          sh: | TODO |

    |       sparc: |  ok  |

    |        tile: | TODO |

    |          um: | TODO |

    |   unicore32: | TODO |

    |         x86: |  ok  |

    |      xtensa: | TODO |

    -----------------------

Documentation/features/core/tracehook/arch-support.txt

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#

# Feature name:          tracehook

#         Kconfig:       HAVE_ARCH_TRACEHOOK

#         description:   arch supports tracehook (ptrace) register handling APIs

#

    -----------------------

    |         arch |status|

    -----------------------

    |       alpha: | TODO |

    |         arc: |  ok  |

    |         arm: |  ok  |

    |       arm64: |  ok  |

    |       avr32: | TODO |

    |    blackfin: |  ok  |

    |         c6x: |  ok  |

    |        cris: | TODO |

    |         frv: |  ok  |

    |       h8300: | TODO |

    |     hexagon: |  ok  |

    |        ia64: |  ok  |

    |        m32r: | TODO |

    |        m68k: | TODO |

    |       metag: |  ok  |

    |  microblaze: | TODO |

    |        mips: |  ok  |

    |     mn10300: |  ok  |

    |       nios2: |  ok  |

    |    openrisc: |  ok  |

    |      parisc: | TODO |

    |     powerpc: |  ok  |

    |        s390: |  ok  |

    |       score: | TODO |

    |          sh: |  ok  |

    |       sparc: |  ok  |

    |        tile: |  ok  |

    |          um: | TODO |

    |   unicore32: | TODO |

    |         x86: |  ok  |

    |      xtensa: | TODO |

    -----------------------