lkml.org 
[lkml]   [2018]   [Jun]   [27]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
From
Subject[PATCH 0/5] add support for relative references in jump tables
Date
This series implements support for emitting the data structures associated
with jump tables as 32-bit relative references instead of absolute
references, which take up more space on builds that target 64-bit
architectures, or implement self relocation [or both].

This series enables it for arm64 and x86, although other architectures
might benefit as well.

Patch #1 does some preparatory refactoring before patch #2 introduces the
generic pieces required for using relative references.

Patch #3 wires everything up for arm64.

For x86, patch #4 applies some preparatory changes for the arch specific
jump label C code, which is a lot more involved than on arm64, which is
why it is split off in this case. Patch #5 wires it up for x86 as well.

Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Will Deacon <will.deacon@arm.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Peter Zijlstra <peterz@infradead.org>

Ard Biesheuvel (5):
kernel/jump_label: abstract jump_entry member accessors
kernel/jump_label: implement generic support for relative references
arm64/kernel: jump_label: switch to relative references
x86: jump_label: switch to jump_entry accessors
x86/kernel: jump_table: use relative references

arch/Kconfig | 3 +
arch/arm64/Kconfig | 1 +
arch/arm64/include/asm/jump_label.h | 16 ++---
arch/arm64/kernel/jump_label.c | 6 +-
arch/x86/Kconfig | 1 +
arch/x86/include/asm/jump_label.h | 28 +++------
arch/x86/kernel/jump_label.c | 43 +++++++------
include/linux/jump_label.h | 64 ++++++++++++++++++++
kernel/jump_label.c | 56 ++++++++++-------
tools/objtool/special.c | 4 +-
10 files changed, 145 insertions(+), 77 deletions(-)

--
2.11.0

\
 
 \ /
  Last update: 2018-06-27 18:06    [W:0.081 / U:0.688 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site