Re: [RFC PATCH 1/3] content: Add VIRTIO_F_SWIOTLB to negotiate use of SWIOTLB bounce buffers

[Zhu Lingshan]

On 4/3/2025 3:24 PM, David Woodhouse wrote:
> On Thu, 2025-04-03 at 15:13 +0800, Zhu Lingshan wrote:
>> Hello David
>>
>> IMHO, if we need a bounce buffer, why not place it on the host memory?
> As explained in the cover letter, this is designed for the case where
> the device *cannot* easily access host memory.

Do you mean CoCo encrypted memory? If so, what is the difference between
the host memory side bounce buffer and a device memory bounce buffer
to a guest except the transport(DDR or PCI)? The device should be
able to access host memory side bounce buffer.

Thanks
Zhu Lingshan

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