On Wed, 19 Nov 2025 at 13:51, Gerd Hoffmann via groups.io
<[email protected]> wrote:
>
> > > https://github.com/tianocore/edk2/pull/11770
> >
> > That patch did not apply cleanly on current edk2 master[46548b1].
>
> Just pull the branch (https://github.com/kraxel/edk2/tree/devel/vc-no-cmp).
>
> > +  CopyMem (&Hdr, FwVolHeader, sizeof (Hdr));
>
> > Invalid MMIO opcode (A5)
>
> String move instruction.  So we are trading one unsupported for another
> unsupported.  Pushed an incremental fix to the branch, avoiding
> CopyMem() too.
>

Can we use MMIO accessors here instead? Any plain access might be
reordered/combined to produce another unsupported opcode, no?


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