Re: [PATCH v5 3/3] x86/tdx: Add Quote generation support

[Kirill A. Shutemov]

On Fri, May 06, 2022 at 12:11:03PM +1200, Kai Huang wrote:
> Kirill, what's your opinion?

I said before that I think DMA API is the right tool here.

Speculation about future of DMA in TDX is irrelevant here. If semantics
change we will need to re-evaluate all users. VirtIO uses DMA API and it
is conceptually the same use-case: communicate with the host.

But vmap() + set_memory_decrypted() also works and Sathya already has code
for it. I'm fine with this.

Going a step below to manual MapGPA() is just wrong. We introduced
abstructions for a reason. Protocol of changing GPA status is not trivial.
We should not spread it across all kernel codebase.

-- 
 Kirill A. Shutemov