Re: [edk2-devel] [PATCH 0/3] CloudHv: Rely on PVH boot specification

["Boeuf, Sebastien" <sebastien.boeuf@intel.com>]

On Wed, 2022-02-23 at 13:02 +0100, kraxel@redhat.com wrote:
>   Hi,
> 
> > Well that's a good question. If we expect the same target (CloudHv)
> > to
> > support both TDX and non-TDX, that means the generated TDVF will be
> > a
> > PVH ELF binary, which will require some special handling from Cloud
> > Hypervisor.
> > Having two separate targets would simplify things a lot. What's the
> > plan for QEMU? Will the same OVMF target cover both use cases?
> 
> Yes, there will be a single binary supporting both tdx and non-tdx,
> some
> configs add sev to the mix.  Doing the same for cloudhv shouldn't be
> much
> of a problem I think.
> 
> In tdx mode the firmware uses the tdhob for memory detection, in non-
> tdx
> mode qemu fw_cfg is used instead.  The cloudhv build could switch
> between tdhob and pvhinfo in a simliar way.

Sounds good :)

> 
> take care,
>  Gerd
> 

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