On Wed, Jul 30, 2025 at 02:39:29PM +0200, Igor Mammedov wrote:
> diff --git a/system/memory.c b/system/memory.c
> index 5646547940..9a5a262112 100644
> --- a/system/memory.c
> +++ b/system/memory.c
> @@ -2546,6 +2546,12 @@ void memory_region_clear_flush_coalesced(MemoryRegion
> *mr)
> }
> }
>
> +void memory_region_enable_lockless_io(MemoryRegion *mr)
> +{
> + mr->lockless_io = true;
> + mr->disable_reentrancy_guard = true;
IIUC this is needed only because the re-entrancy guard is not
per-transaction but per-device, am I right?
Maybe some comment would be nice here to explain how mmio concurrency could
affect this. If my above comment is correct, it could also be a TODO so we
could re-enable this when it is per-transaction (even though I don't know
whether it's easy / useful to do..).
Thanks,
--
Peter Xu
