Re: [PATCH v3 00/10] Add Intel VT-d nested translation

[Alex Williamson]

On Mon, 29 May 2023 15:43:02 -0300
Jason Gunthorpe <jgg@xxxxxxxxxx> wrote:

> On Wed, May 24, 2023 at 08:59:43AM +0000, Tian, Kevin wrote:
> 
> > At least this looks a reasonable tradeoff to some proprietary VMMs
> > which never adds RO mappings in stage-2 today.  
> 
> What is the reason for the RO anyhow?
> 
> Would it be so bad if it was DMA mapped as RW due to the errata?

What if it's the zero page?  Thanks,

Alex