[PATCH v2 0/8] x86: infrastructure to enable FSGSBASE

[Chang S. Bae]

Given feedbacks from [1], it was asked to make first a few
patches ready as soon as possible. To make FSGSBASE facilitated,
some helper functions and refactoring work are incorporated.
Besides that, it includes Andy's fix for accurate FS/GS base read
and cleanup for the vDSO initialization.

Changes from V1:
* Rename the x86-64 CPU_NUMBER segment from PER_CPU
* Add i386 CPU_NUMBER equivalent to x86-64 at GDT entry 23
* Add additional helper function to store CPU number

[1] FSGSBASE patch set V2: https://lkml.org/lkml/2018/5/31/686
[2] infrastructure to enable FSGSBASE V1: https://lkml.org/lkml/2018/6/4/887

Andy Lutomirski (1):
  x86/fsgsbase/64: Make ptrace read FS/GS base accurately

Chang S. Bae (7):
  x86/fsgsbase/64: Introduce FS/GS base helper functions
  x86/fsgsbase/64: Use FS/GS base helpers in core dump
  x86/fsgsbase/64: Factor out load FS/GS segments from __switch_to
  x86/msr: write_rdtscp_aux() to use wrmsr_safe()
  x86/segments/64: Rename PER_CPU segment to CPU_NUMBER
  x86/segments/32: Introduce CPU_NUMBER segment
  x86/vdso: Move out the CPU number store

 arch/x86/entry/vdso/vgetcpu.c   |   4 +-
 arch/x86/entry/vdso/vma.c       |  38 +--------
 arch/x86/include/asm/elf.h      |   6 +-
 arch/x86/include/asm/fsgsbase.h |  47 +++++++++++
 arch/x86/include/asm/msr.h      |   2 +-
 arch/x86/include/asm/segment.h  |  60 ++++++++++---
 arch/x86/include/asm/vgtod.h    |   4 +-
 arch/x86/kernel/cpu/common.c    |   5 ++
 arch/x86/kernel/process_64.c    | 181 +++++++++++++++++++++++++++++++---------
 arch/x86/kernel/ptrace.c        |  28 ++-----
 arch/x86/kernel/setup_percpu.c  |  25 ++++++
 11 files changed, 284 insertions(+), 116 deletions(-)
 create mode 100644 arch/x86/include/asm/fsgsbase.h

-- 
2.7.4