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

Roman Kisel romank at linux.microsoft.com
Wed Apr 9 08:27:22 PDT 2025



On 4/9/2025 3:52 AM, Christoph Hellwig wrote:
> 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.

Thanks for reviewing! I'll fix the description.

> 

-- 
Thank you,
Roman




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