Re: [RFC PATCH-for-5.1? v3 2/2] hw/isa/isa-bus: Ensure ISA I/O regions are 8/16/32-bit accessible

[Peter Maydell]

On Tue, 21 Jul 2020 at 13:31, Philippe Mathieu-Daudé <f4bug@amsat.org> wrote:
>
> Since commit 5d971f9e67 we don't accept mismatching sizes
> in memory_region_access_valid(). This gives troubles when
> a device is on an ISA bus, because the CPU is free to use
> 8/16-bit accesses on the bus (or up to 32-bit on EISA bus),
> regardless what range is valid for the device.
>
> Monkey-patch the ISA device MemoryRegionOps to force it
> to accepts 8/16/32-bit accesses. This should be reverted
> after the release and fixed in a more elegant manner.

Do we need something similar for isa_register_portio_list(),
or is that function OK ?

Do we have a view on what the 'more elegant manner' would look like?

thanks
-- PMM