[edk2-devel] [PATCH v1 2/2] StandaloneMmPkg: Fix HOB space and heap space conflicted issue

Ard Biesheuvel ardb at kernel.org
Wed Sep 6 08:50:51 UTC 2023


On Wed, 6 Sept 2023 at 09:56, Nhi Pham <nhi at amperemail.onmicrosoft.com> wrote:
>
> On 9/6/2023 1:33 PM, Ni, Ray wrote:
> > [EXTERNAL EMAIL NOTICE: This email originated from an external sender.
> > Please be mindful of safe email handling and proprietary information
> > protection practices.]
> >
> > I am a bit confused.
> >
> > The HOB list in standalone MM is read-only. Why could any module call
> > BuildGuidHob() to modify the HOB.
> >
> > I saw Oliver mentioned something about StMM. I don't know what that is.
> > But it seems that's ARM specific. Then, I don't think it's proper to
> > modify code here for a specific arch ARM.
>
> The HOB creation is available in the
> StandaloneMmPkg/Library/StandaloneMmHobLib/StandaloneMmHobLib.inf. If
> other architectures also use that instance, I think the issue is not
> specific to ARM.
>

The question here is whether the implementation follows the PI spec,
and whether HOB creation should be supported to begin with.


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