Re: [PATCH v8 5/8] memory: Allow disabling re-entrancy checking per-MR

[Thomas Huth <thuth@redhat.com>]

On 21/04/2023 16.27, Alexander Bulekov wrote:
> Signed-off-by: Alexander Bulekov <alxndr@bu.edu>
> Reviewed-by: Thomas Huth <thuth@redhat.com>
> Reviewed-by: Darren Kenny <darren.kenny@oracle.com>
> ---
>   include/exec/memory.h | 3 +++
>   1 file changed, 3 insertions(+)
> 
> diff --git a/include/exec/memory.h b/include/exec/memory.h
> index 6c0a5e68d3..4e9531bd8a 100644
> --- a/include/exec/memory.h
> +++ b/include/exec/memory.h
> @@ -793,6 +793,9 @@ struct MemoryRegion {
>       unsigned ioeventfd_nb;
>       MemoryRegionIoeventfd *ioeventfds;
>       RamDiscardManager *rdm; /* Only for RAM */
> +
> +    /* For devices designed to perform re-entrant IO into their own IO MRs */
> +    bool disable_reentrancy_guard;
>   };
>   
>   struct IOMMUMemoryRegion {

Oh, wait, that check for "!mr->disable_reentrancy_guard" has been squashed 
into the first patch now ... that's bad, I think you should squash this into 
the first patch now, too!

  Thomas