Re: [edk2-devel] [PATCH 2/3] OvmfPkg: CloudHv: Retrieve RSDP address from PVH

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

On Wed, 2022-02-23 at 12:31 +0100, Gerd Hoffmann wrote:
>   Hi,
> 
> > +  PVHResetVectorData = (VOID *)(UINTN)PcdGet32
> > (PcdXenPvhStartOfDayStructPtr);
> > +  pvh_start_info       = (struct hvm_start_info
> > *)(UINTN)PVHResetVectorData[0];
> 
> Ah, I see, here is the xen reset vector dependency.
> 
> I'm wondering whenever there are plans for cloudhv to also support
> sev
> and/or tdx some day.  If so, then it probably isn't a good idea to
> switch to the xen reset vector.  

Well Cloud Hypervisor aims at supporting TDX, but based on a separate
firmware. We're not trying to support both TDX and non-TDX use cases
with the same binary, which simplifies the problem here.

> There is the work area used for by
> confidential computing code, I think it would be an option to store a
> pointer to the pvh_start_info there.

Sorry I'm not aware of the confidential computing code. Can you point
me to it?

> 
> take care,
>   Gerd
> 
> 
> 
> 
> 
> 

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