Re: [PATCH 2/3] hw/misc: Add mmio-debug-exit device

[Richard Henderson]

On 7/12/22 00:26, Ilya Leoshkevich wrote:
> System tests on x86 use isa-debug-exit device in order to signal
> success or failure to the test runner. Unfortunately it's not easily
> usable on other architectures, since a guest needs to access
> address_space_io, which may not be as straightforward as on x86.
> Also, it requires adding ISA bus, which an architecture might not
> otherwise need.
>
> Introduce mmio-debug-exit device, which has the same semantics, but is
> triggered by writes to memory.
>
> Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com>

You shouldn't need this for s390x, as there are already (at least) two other paths to 
qemu_system_shutdown_request.

E.g. SIGP, which has a stop option.


r~