RFC： https://bugzilla.tianocore.org/show_bug.cgi?id=3429
Intel TDX architecture does not prescribe a specific software convention
to perform I/O from the guest TD. Guest TD providers have many choices to
provide I/O to the guest. The common I/O models are emulated devices,
para-virtualized devices
Hi,
> In the I/O functions of above files, if IsTdxGuest() returns TRUE, then
> Td I/O routine is called, otherwise the legacy I/O routine is called.
> Td I/O routines are declared in IoLibTdx.h and implemented in
> IoLibInternalTdx.c.
Sorry, I'm a bit late to the party, but what is the overall
On August 17, 2021 4:38 PM, Gerd Hoffmann wrote:
>
> Hi,
>
> > In the I/O functions of above files, if IsTdxGuest() returns TRUE,
> > then Td I/O routine is called, otherwise the legacy I/O routine is called.
> > Td I/O routines are declared in IoLibTdx.h and implemented in
> > IoLibInternalTdx
Hi,
> > IIRC some of the TDX features require a separate firmware binary. So, if we
> > need a separate binary anyway at some point in the future, isn't it simpler
> > then
> > to use a separate firmware binary right from the start?
> >
> > You can simply add a Tdx-specific variant of the lib
On August 19, 2021 2:31 PM, Gerd Hoffmann wrote:
> > > IIRC some of the TDX features require a separate firmware binary.
> > > So, if we need a separate binary anyway at some point in the future,
> > > isn't it simpler then to use a separate firmware binary right from the
> > > start?
> > >
> > >
Hi,
> > One more question: How does this align with the WorkArea changes posted
> > yesterday? The WorkArea gets a mode field for SEV / TDX / normal, so I
> > think
> > you should be able to use that instead of invoking cpuid each time you need
> > to know whenever tdx is active or not.
> We
On Thu, Aug 12, 2021 at 2:57 PM Min Xu wrote:
> +UINT8
> +EFIAPI
> +TdMmioRead8 (
> + IN UINTN Address
> + )
> +{
> + UINT64 Value;
> + UINT64 Status;
> +
> + Address |= TdSharedPageMask ();
Why is the SharedBi
On September 11, 2021 9:16 AM, Erdem Aktas wrote:
>
> On Thu, Aug 12, 2021 at 2:57 PM Min Xu wrote:
> > +UINT8
> > +EFIAPI
> > +TdMmioRead8 (
> > + IN UINTN Address
> > + )
> > +{
> > + UINT64 Value;
> > + UINT64
