Re: [PATCH v1 1/8] virtio: Force only split mode with protected guest

Jason Wang
2021-06-04T02:30:02Z

在 2021/6/3 下午9:55, Andi Kleen 写道:
>
>> Ok, but what I meant is this, if we don't read from the descriptor
>> ring, and validate all the other metadata supplied by the device
>> (used id and len). Then there should be no way for the device to
>> suppress the dma flags to write to the indirect descriptor table.
>>
>> Or do you have an example how it can do that?
>
> I don't. If you can validate everything it's probably ok
>
> The only drawback is even more code to audit and test.
>
> -Andi
>
>

Ok, then I'm going to post a formal series, please have a look and we
can start from there.

Thanks