linux-kernel - RE: [PATCH v3 0/7] firmware: smccc: Add basic SMCCC v1.2 + ARCH_SOC

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Date:   Fri, 15 May 2020 09:50:32 +0200
From:   Etienne Carriere <etienne.carriere@...aro.org>
To:     sudeep.holla@....com
Cc:     arnd@...db.de, catalin.marinas@....com, harb@...erecomputing.com,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        lorenzo.pieralisi@....com, mark.rutland@....com,
        steven.price@....com, will@...nel.org
Subject: RE: [PATCH v3 0/7] firmware: smccc: Add basic SMCCC v1.2 + ARCH_SOC_ID support

> From: Sudeep Holla <sudeep.holla@....com>
>
> Hi,
>
> This patch series adds support for SMCCCv1.2 ARCH_SOC_ID.
> This doesn't add other changes added in SMCCC v1.2 yet. They will
> follow these soon along with its first user SPCI/PSA-FF.
>
> This is tested using upstream TF-A + the patch[2] fixing the original
> implementation there.
>
>
> v1[0]->v2[1]:
> - Incorporated comments from Steven Price in patch 5/5
> - Fixed build for CONFIG_PSCI_FW=n on some arm32 platforms
> - Added Steven Price's review tags
>
> v2[1]->v3:
> - Incorporated additional comments from Steven Price in patch 5/5
>  and added his review tags
> - Refactored SMCCC code from PSCI and moved it under
>  drivers/firmware/smccc/smccc.c
> - Also moved soc_id.c under drivers/firmware/smccc
>
> Regards,
> Sudeep

Hello Sudeep,

In case it helps. I have successfully tested the 7 patches series
on some platforms, playing a bit with few configurations.
Qemu emulator for arm64/cortex-a57 with TF-A (v2.x) as secure firmware.
Qemu emulator for arm/cortex-a15. OP-TEE (v3.x) as secure firmware.
A stm32mp15 device (arm/cortex-a7), tested both TF-A (v2.x) and
OP-TEE (3.7.0, 3.9.0-rc) as runtime secure firmware.

Helper functions arm_smccc_1_1_get_conduit()/arm_smccc_1_1_invoke() 
works as expected AFAICT. No regression seen with older secure
firmwares.

For the patches 1 to 6, as I poorly tested [v3,7/7] soc ids,
based on tag next-20200505 [1]:
Tested-by: Etienne Carriere <etienne.carriere@...com>
Reviewed-by: Etienne Carriere <etienne.carriere@...com>

For [v3,7/7] firmware: smccc: Add ARCH_SOC_ID support
Acked-by: Etienne Carriere <etienne.carriere@...com>

[1] 7def1ef0f72c ("Add linux-next specific files for 20200505")

Regards,
Etienne