[0/3] Add KGDB support to parisc

Message

Sven Schnelle April 2, 2019, 8:48 p.m. UTC

Hi,

these series add fixed mappings, a function to patch kernel text
with RO kernel text and kgdb support to parisc.

Fixed mappings are located at the end of the VMALLOC address range. patch_text()
is introduced based on the ARM implementation, which utilizies fixed mappings.
patch_text() only supports late patching, but we might extend it later with
early patching functionality. And last but not least the last patch adds KGDB
functionality. KGDB was tested on C3750 with a 32 and 64 bit kernel, on C8000
with 64 bit.

Sven Schnelle (3):
  parisc: add set_fixmap()/clear_fixmap()
  parisc: add parisc code patching
  parisc: add KGDB support

 arch/parisc/Kconfig              |   1 +
 arch/parisc/include/asm/fixmap.h |  19 ++-
 arch/parisc/include/asm/kgdb.h   |  68 ++++++++++
 arch/parisc/include/asm/patch.h  |   7 ++
 arch/parisc/kernel/Makefile      |   4 +-
 arch/parisc/kernel/kgdb.c        | 210 +++++++++++++++++++++++++++++++
 arch/parisc/kernel/patch.c       |  78 ++++++++++++
 arch/parisc/kernel/traps.c       |  15 +++
 arch/parisc/mm/Makefile          |   2 +-
 arch/parisc/mm/fixmap.c          |  43 +++++++
 arch/parisc/mm/init.c            |  14 ++-
 11 files changed, 453 insertions(+), 8 deletions(-)
 create mode 100644 arch/parisc/include/asm/kgdb.h
 create mode 100644 arch/parisc/include/asm/patch.h
 create mode 100644 arch/parisc/kernel/kgdb.c
 create mode 100644 arch/parisc/kernel/patch.c
 create mode 100644 arch/parisc/mm/fixmap.c