Re: [PATCH v2] accel/tcg/user-exec: Fix read-modify-write of code on s390 hosts

[Richard Henderson]

On 8/3/21 3:16 PM, Ilya Leoshkevich wrote:
> x86_64 dotnet/runtime uses cmpxchg for code patching. When running it
> under s390x qemu-linux user, cpu_signal_handler() does not recognize
> this as a write and does not restore PAGE_WRITE cleared by
> tb_page_add(), incorrectly forwarding the signal to the guest code.
>
> Signed-off-by: Ilya Leoshkevich<iii@linux.ibm.com>
> ---
>
> v1:https://lists.nongnu.org/archive/html/qemu-devel/2021-08/msg00464.html
> v1 -> v2: Fix comment style, fix CSST detection (Richard).
>
>   accel/tcg/user-exec.c | 48 ++++++++++++++++++++++++++++++++++++-------
>   1 file changed, 41 insertions(+), 7 deletions(-)

Queued, thanks.

r~