Re: [PATCH v2] arm: k3: Kconfig: Enable fTPM and RPMB support

[Francesco Dolcini <francesco@dolcini.it>]

On Wed, Jun 10, 2026 at 06:57:54PM +0530, Shiva Tripathi wrote:
> 
> 
> On 6/10/26 11:21, Francesco Dolcini wrote:
> > Hello Shiva,
> > 
> > On Fri, May 22, 2026 at 11:36:37AM -0600, Tom Rini wrote:
> >> On Fri, May 22, 2026 at 06:20:48PM +0200, Francesco Dolcini wrote:
> >>> On Fri, May 22, 2026 at 07:49:27PM +0530, Shiva Tripathi wrote:
> >>>> On 5/22/26 11:45, Francesco Dolcini wrote:
> >>>>> On Wed, May 13, 2026 at 06:36:40PM +0530, Shiva Tripathi wrote:
> >>>>> On Wed, May 13, 2026 at 08:49:31AM -0500, Andrew Davis wrote:
> >>>>>> This makes me think we are at the stage in boot where EFI variables
> >>>>>> are trying to be persisted to some media, and when trying to use
> >>>>>> the fTPM for this it fails (as would be expected without RPMB).
> >>>>>> So this should be harmless, but why there is such a large error
> >>>>>> printout we need to investigate and try to make it less verbose.
> >>>>>
> >>>>> Any chance TI can help on this?
> >>>> Yes, I am looking into it. The logs are showing up as OPTEE's fTPM TA is
> >>>> failing to load, since the eMMC RPMB isn't provisioned.
> >>>
> >>> Thanks for looking into that, and I am glad you can reproduce the issue.
> >>>
> >>>> Even though these logs don't affect functionality, you can revert this
> >>>> patch to avoid confusion. I am checking if there's a cleaner way to
> >>>> handle this.
> >>>
> >>> I am using mainline U-Boot, if this needs to be reverted, it must be
> >>> reverted here. Given the release timeline, and the fact that this is not
> >>> breaking the functionality I am fine waiting a little bit to see if it
> >>> is possible to fix it, we have some time before the v2026.07 release.
> >>
> >> And for the release I would like to make sure someone has a clear path
> >> on what changes are needed, if any in the end, on mainline U-Boot by
> >> rc4, which is June 8th. We have the last one on June 22nd but I'd rather
> >> not have to revert then unless things are just unresolved. Thanks!
> > 
> > Shiva: what's the plan? As of now the issue is still there.
> > 
> I have sent a fix patch to optee_ftpm[1]. With this patch, the fTPM TA
> gracefully handles RPMB unavailability without panicking, eliminating
> the memory dumps.
> 
> For now, there are two interim approaches:
> 1. Revert the u-boot patch that enabled k3 fTPM configs
> 2. Apply the optee-ftpm patch in meta-ti recipes
> 
> I am waiting review from optee-ftpm maintainers. If it's accepted, we
> will upgrade the optee-ftpm in meta-ti to the fixed version.

Given the current status I would not revert the patch in U-Boot.

Once the patch is accepted in optee the issue will naturally solve on its own,
and in the short term you can have the patch in meta-ti.

Francesco