On November 3, 2021 2:51 PM, Gerd Hoffmann wrote:
> > +/**
> > + Check if it is Tdx guest
> > +
> > + @retval TRUE It is Tdx guest
> > + @retval FALSE It is not Tdx guest
> > +**/
> > +BOOLEAN
> > +QemuFwCfgIsTdxGuest (
>
> QemuFwCfgIsCC()
>
> > + return (CcWorkAreaHeader != NULL && CcWorkAreaHeader-
> >GuestType == GUEST_TYPE_INTEL_TDX);
>
> GuestType != GUEST_TYPE_NON_ENCRYPTED
>
> > if (MemEncryptSevIsEnabled ()) {
> > DEBUG ((DEBUG_INFO, "SEV: QemuFwCfg fallback to IO Port
> interface.\n"));
> > + } else if (QemuFwCfgIsTdxGuest ()) {
>
> if (QemuFwCfgIsCC()
>
Hi, Gerd
I re-check the MemEncryptSevIsEnabled() and it doesn't simply check the
GuestType. Instead it does more checking.
See
https://github.com/tianocore/edk2/blob/master/OvmfPkg/Library/BaseMemEncryptSevLib/PeiMemEncryptSevLibInternal.c#L34-L88
Brijesh, what's your thought about Gerd's suggestion?
Thanks
Min
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