Re: [PATCH] xen/arm: optee: Fix arm_smccc_smc's a0 for OPTEE_SMC_DISABLE_SHM_CACHE

[Julien Grall <julien@xxxxxxx>]

Hi Stefano,

On 28/09/2021 06:52, Stefano Stabellini wrote:
> On Mon, 27 Sep 2021, Oleksandr Tyshchenko wrote:
> > From: Oleksandr Tyshchenko <oleksandr_tyshchenko@xxxxxxxx>
> >
> > Fix a possible copy-paste error in arm_smccc_smc's first argument (a0)
> > for OPTEE_SMC_DISABLE_SHM_CACHE case.
> >
> > This error causes Linux > v5.14-rc5 (b5c10dd04b7418793517e3286cde5c04759a86de
> > optee: Clear stale cache entries during initialization) to stuck
> > repeatedly issuing OPTEE_SMC_DISABLE_SHM_CACHE call and waiting for
> > the result to be OPTEE_SMC_RETURN_ENOTAVAIL which will never happen.
> >
> > Signed-off-by: Oleksandr Tyshchenko <oleksandr_tyshchenko@xxxxxxxx>
> Acked-by: Stefano Stabellini <sstabellini@xxxxxxxxxx>
>
> I added Fixes: and Backport: tags to the commit
Per SUPPORT.MD, OP-TEE is still a technical preview. So I would argue 
that we should not do any backport because the feature itself is not 
officially considered supported.
That said, what's missing to make the feature officially supported?

Cheers,

--
Julien Grall