[Xen-devel] [PATCH v2 0/5] x86: Use alternative mechanism to define CLAC/STAC

[Feng Wu <feng.wu@xxxxxxxxx>]

This patch set ports the basic alternative mechanism from Linux to Xen
and use it to define CLAC/STAC.

Version 1:
  * Initial version

Version 2:
  * Use STR() as the only method for performing preprocessor stringificaion.
  * Set ideal_nops to k8_nops by default
  * Make ideal_nops static and __initdata
  * Mask the lowest bit when handling relative jump in apply_alternatives()
  * Move .altinstr_replacemen and altinstructions to .init section
  * Include nops.h in alternative.h
  * Some code style changes

There are some changes related to ARM code in the first patch of this series,
but I don't have ARM environment to verify it. The changes in x86 side have
the same logic, and I verify it in x86 side.

Feng Wu (5):
  Use STR() as the only method for performing preprocessor
    stringificaion
  x86: Add definitions for NOP operation
  x86: Make set_nmi_callback return the old nmi callback
  x86: Port the basic alternative mechanism from Linux to Xen
  x86: Use alternative mechanism to define CLAC/STAC

 xen/arch/arm/domain_build.c           |   2 +-
 xen/arch/x86/Makefile                 |   1 +
 xen/arch/x86/alternative.c            | 213 ++++++++++++++++++++++++++++++++++
 xen/arch/x86/efi/boot.c               |   3 +-
 xen/arch/x86/setup.c                  |   3 +
 xen/arch/x86/traps.c                  |   4 +-
 xen/arch/x86/xen.lds.S                |  15 +++
 xen/include/asm-arm/arm32/processor.h |  10 +-
 xen/include/asm-arm/cpregs.h          |   2 -
 xen/include/asm-arm/sysregs.h         |   2 -
 xen/include/asm-x86/alternative.h     |  78 +++++++++++++
 xen/include/asm-x86/asm_defns.h       |  25 ++--
 xen/include/asm-x86/nmi.h             |   4 +-
 xen/include/asm-x86/nops.h            |  66 +++++++++++
 xen/include/xen/stringify.h           |  12 --
 15 files changed, 401 insertions(+), 39 deletions(-)
 create mode 100644 xen/arch/x86/alternative.c
 create mode 100644 xen/include/asm-x86/alternative.h
 create mode 100644 xen/include/asm-x86/nops.h
 delete mode 100644 xen/include/xen/stringify.h

-- 
1.8.3.1


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