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

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)

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?


Julien Grall



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