Version 1 was very nearly 2 years ago: https://lore.kernel.org/qemu-devel/20210316220735.2048137-1-richard.hender...@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(-) -- 2.34.1
