[Qemu-devel] [PATCH 00/11] tcg: Make direct jump patching thread-safe

[Sergey Fedorov]

From: Sergey Fedorov <address@hidden>

When patching translated code for direct block chaining/unchaining,
modification of concurrently executing code can happen in multi-threaded
execution.  Currently only user-mode is affected. To make direct block patching
safe, some care must be taken to make sure that the code modification is made
atomic and concurrently executed code is guaranteed to be consistent.

This patch series fixes all supported TCG targets using direct patching and
documents the requirement for direct jump patching be atomic and thread-safe.

The series' tree can be found in a public git repository [1].

[1] https://github.com/sergefdrv/qemu/tree/atomic-tb-patching

Sergey Fedorov (10):
  pc-bios/s390-ccw: Use correct strip when cross-compiling
  tci: Make direct jump patching thread-safe
  tcg/ppc: Make direct jump patching thread-safe
  tcg/i386: Make direct jump patching thread-safe
  tcg/s390: Make direct jump patching thread-safe
  tcg/arm: Make direct jump patching thread-safe
  tcg/aarch64: Make direct jump patching thread-safe
  tcg/sparc: Make direct jump patching thread-safe
  tcg/mips: Make direct jump patching thread-safe
  tcg: Note requirement on atomic direct jump patching

Stefan Weil (1):
  tci: Fix build regression

 include/exec/exec-all.h      | 32 ++++++------------------------
 pc-bios/s390-ccw/Makefile    |  2 +-
 tcg/aarch64/tcg-target.inc.c | 14 +++++++++++++-
 tcg/arm/tcg-target.inc.c     | 17 ++++++++++++++++
 tcg/i386/tcg-target.inc.c    | 17 ++++++++++++++++
 tcg/mips/tcg-target.inc.c    |  3 ++-
 tcg/ppc/tcg-target.inc.c     | 22 +++++++++++++++++----
 tcg/s390/tcg-target.inc.c    |  6 ++++++
 tcg/sparc/tcg-target.inc.c   |  2 +-
 tcg/tci/tcg-target.inc.c     |  2 ++
 tci.c                        | 46 +++++++++++++++++++++++++-------------------
 translate-all.c              |  2 ++
 12 files changed, 111 insertions(+), 54 deletions(-)

-- 
2.8.1