Re: [RFC v2 26/32] x86/mm: Move force_dma_unencrypted() to common code

[Kuppuswamy, Sathyanarayanan]

On 5/12/21 8:44 AM, Dave Hansen wrote:
> Because the code is already separate.  You're actually going to some
> trouble to move the SEV-specific code and then combine it with the
> TDX-specific code.
>
> Anyway, please just give it a shot.  Should take all of ten minutes.  If
> it doesn't work out in practice, fine.  You'll have a good paragraph for
> the changelog.

After reviewing the code again, I have noticed that we don't really have
much common code between AMD and TDX. So I don't see any justification for
creating this common layer. So, I have decided to drop this patch and move
Intel TDX specific memory encryption init code to patch titled "[RFC v2 30/32]
x86/tdx: Make DMA pages shared". This model is similar to how AMD-SEV
does the initialization.

I have sent the modified patch as reply to patch titled "[RFC v2 30/32]
x86/tdx: Make DMA pages shared". Please check and let me know your comments.
--
Sathyanarayanan Kuppuswamy
Linux Kernel Developer