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[Xen-devel] [PATCH RESEND v2 0/7] x86/alternatives: Support for automatic padding calculations

[ Resend properly numbered this time. ]

This is the end result of a lot of work I started during the Spectre/Meltdown
embargo window, and deferred because it was taking too long.  It finally
resolves the explict padding calculations for the SPEC_CTRL alternatives.

This series depends on Roger's "x86/clang: allow integrated assembler usage"
and has been tested with a mainline version of clang.


Andrew Cooper (7):
  x86/alt: Drop unused alternative infrastructure
  x86/alt: Clean up struct alt_instr and its users
  x86/alt: Clean up the assembly used to generate alternatives
  x86/asm: Remove opencoded uses of altinstruction_entry
  x86/alt: Support for automatic padding calculations
  x86/alt: Drop explicit padding of origin sites
  x86/build: Use new .nop directive when available

 xen/arch/x86/Rules.mk                 |   8 ++
 xen/arch/x86/alternative.c            |  48 ++++++++---
 xen/arch/x86/x86_64/compat/entry.S    |  26 +++---
 xen/arch/x86/x86_64/entry.S           |  20 +----
 xen/include/asm-x86/alternative-asm.h | 113 +++++++++++++++++++-------
 xen/include/asm-x86/alternative.h     | 148 +++++++++++++++++++---------------
 xen/include/asm-x86/asm_defns.h       |  32 +++-----
 xen/include/asm-x86/nops.h            |   7 --
 xen/include/asm-x86/spec_ctrl_asm.h   |  19 ++---
 9 files changed, 244 insertions(+), 177 deletions(-)


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