[0/3] retpoline: add clang support + Kconfig selectable

Message

Roger Pau Monné Feb. 16, 2022, 9:02 a.m. UTC

Hello,

The following series adds retpoline support for clang builds, and also
allows the user to select whether to enable retpoline support at build
time via a new Kconfig option.

I've tried adding a suitable description to the Kconfig option, but I'm
sure there's room for improvement.

Thanks, Roger.

Roger Pau Monne (3):
  x86/retpoline: rename retpoline Kconfig check to include GCC prefix
  x86/clang: add retpoline support
  x86/Kconfig: introduce option to select retpoline usage

 xen/arch/x86/Kconfig |  5 ++++-
 xen/arch/x86/arch.mk | 13 +++++++++----
 xen/common/Kconfig   | 16 ++++++++++++++++
 3 files changed, 29 insertions(+), 5 deletions(-)