Re: [PATCH hyperv-next 5/6] arch, drivers: Add device struct bitfield to not bounce-buffer

[Christoph Hellwig]

On Tue, Apr 08, 2025 at 05:08:34PM -0700, Roman Kisel wrote:
> Bounce-buffering makes the system spend more time copying
> I/O data. When the I/O transaction take place between
> a confidential and a non-confidential endpoints, there is
> no other way around.
> 
> Introduce a device bitfield to indicate that the device
> doesn't need to perform bounce buffering. The capable
> device may employ it to save on copying data around.

I have no idea what this is supposed to mean, you need to explain it
much better.