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[v2,0/5] tcg: Issue memory barriers for guest memory model

Message ID 20230306015710.1868853-1-richard.henderson@linaro.org
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Series tcg: Issue memory barriers for guest memory model | expand

Message

Richard Henderson March 6, 2023, 1:57 a.m. UTC 
Version 1 was very nearly 2 years ago:
https://lore.kernel.org/qemu-devel/20210316220735.2048137-1-richard.henderson@linaro.org/

I didn't persue it at the time because at the time it didn't actually
fix the s390x-on-aarch64 problems.  I'm re-posting this now because
of Paolo's "missing barriers on ARM" patch set.

It was never very easy to trigger the s390x problem, but with the two
patch sets I've been unable to do so all day.



r~


Richard Henderson (5):
  tcg: Do not elide memory barriers for !CF_PARALLEL
  tcg: Elide memory barriers implied by the host memory model
  tcg: Create tcg_req_mo
  tcg: Add host memory barriers to cpu_ldst.h interfaces
  accel/tcg: Remove check_tcg_memory_orders_compatible

 include/tcg/tcg.h     | 34 ++++++++++++++++++++++++++++++++++
 accel/tcg/cputlb.c    |  2 ++
 accel/tcg/tcg-all.c   | 38 ++++++++------------------------------
 accel/tcg/user-exec.c | 14 ++++++++++++++
 tcg/tcg-op.c          | 19 +++++++++++--------
 5 files changed, 69 insertions(+), 38 deletions(-)