[PATCH] arm64: defconfig: Enable QCOMTEE for Qualcomm SoCs

[PATCH] arm64: defconfig: Enable QCOMTEE for Qualcomm SoCs

[Harshal Dev]

Enable config for the QCOMTEE driver to facilitate communication with the
Qualcomm Trusted Execution Environment (QTEE) on Qualcomm platforms.

Signed-off-by: Harshal Dev <harshal.dev@oss.qualcomm.com>
---
 arch/arm64/configs/defconfig | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/arm64/configs/defconfig b/arch/arm64/configs/defconfig
index cdb7d69e3b24..57b2b09d0479 100644
--- a/arch/arm64/configs/defconfig
+++ b/arch/arm64/configs/defconfig
@@ -1789,6 +1789,7 @@ CONFIG_FPGA_MGR_ZYNQMP_FPGA=m
 CONFIG_FPGA_MGR_VERSAL_FPGA=m
 CONFIG_TEE=y
 CONFIG_OPTEE=y
+CONFIG_QCOMTEE=y
 CONFIG_MUX_GPIO=m
 CONFIG_MUX_MMIO=y
 CONFIG_SLIMBUS=m

---
base-commit: 47b7b5e32bb7264b51b89186043e1ada4090b558
change-id: 20251202-qcom_qcomtee_defconfig-8dc0fed1411b

Best regards,
-- 
Harshal Dev <harshal.dev@oss.qualcomm.com>

Re: [PATCH] arm64: defconfig: Enable QCOMTEE for Qualcomm SoCs

[Krzysztof Kozlowski]

On 02/12/2025 10:37, Harshal Dev wrote:
> Enable config for the QCOMTEE driver to facilitate communication with the
> Qualcomm Trusted Execution Environment (QTEE) on Qualcomm platforms.

Which platforms use it?
Why this cannot be a module?

> 
> Signed-off-by: Harshal Dev <harshal.dev@oss.qualcomm.com>
> ---
>  arch/arm64/configs/defconfig | 1 +
>  1 file changed, 1 insertion(+)
> 
Best regards,
Krzysztof

Re: [PATCH] arm64: defconfig: Enable QCOMTEE for Qualcomm SoCs

[Krzysztof Kozlowski]

On 02/12/2025 10:43, Krzysztof Kozlowski wrote:
> On 02/12/2025 10:37, Harshal Dev wrote:
>> Enable config for the QCOMTEE driver to facilitate communication with the
>> Qualcomm Trusted Execution Environment (QTEE) on Qualcomm platforms.
> 
> Which platforms use it?
> Why this cannot be a module?
> 

Also, you did not really cc necessary lists. Use get_maintainers.pl on
qcom soc code for example.


Best regards,
Krzysztof

Re: [PATCH] arm64: defconfig: Enable QCOMTEE for Qualcomm SoCs

[Harshal Dev]

Hi Krzysztof,

On 12/2/2025 3:13 PM, Krzysztof Kozlowski wrote:
> On 02/12/2025 10:37, Harshal Dev wrote:
>> Enable config for the QCOMTEE driver to facilitate communication with the
>> Qualcomm Trusted Execution Environment (QTEE) on Qualcomm platforms.
> 
> Which platforms use it?

The Qualcomm Trusted Execution Environment (QTEE) firmware is available on all
Qualcomm platforms. However, certain platforms like db410c (APQ8016), where QTEE
does not support Object-IPC (the communication protocol implemented by QCOMTEE driver)
a graceful -EIO is returned by qcom_scm_qtee_init() which is in-charge of dynamically
registering the QCOMTEE driver as a platform driver during qcom_scm_probe().
More details available here: https://lore.kernel.org/op-tee/20250820-qcom-tee-using-tee-ss-without-mem-obj-v8-0-7066680f138a@oss.qualcomm.com/T/#m1eba97cb921c958034ffe7e2bfb776177ba48eb6

And so, the QCOMTEE driver can be safely enabled on all Qualcomm platforms regardless
of QTEE firmware version.

> Why this cannot be a module?

Upon a bit of reflection, I have realized that it is completely fine to have this driver
built as an in-tree module. I have also validated that this presents no issues during
loading/unloading of the driver.

I will send a new patch and update the CONFIG_QCOMTEE flag to m.

Regards,
Harshal

>
>>
>> Signed-off-by: Harshal Dev <harshal.dev@oss.qualcomm.com>
>> ---
>>  arch/arm64/configs/defconfig | 1 +
>>  1 file changed, 1 insertion(+)
>>
> Best regards,
> Krzysztof

Re: [PATCH] arm64: defconfig: Enable QCOMTEE for Qualcomm SoCs

[Harshal Dev]

Hi, Krzysztof

On 12/2/2025 3:15 PM, Krzysztof Kozlowski wrote:
> On 02/12/2025 10:43, Krzysztof Kozlowski wrote:
>> On 02/12/2025 10:37, Harshal Dev wrote:
>>> Enable config for the QCOMTEE driver to facilitate communication with the
>>> Qualcomm Trusted Execution Environment (QTEE) on Qualcomm platforms.
>>
>> Which platforms use it?
>> Why this cannot be a module?
>>
> 
> Also, you did not really cc necessary lists. Use get_maintainers.pl on
> qcom soc code for example.

Sure, thanks for pointing this out, I will add the folks from Qcom SoC code in
the next patch. :)

Regards,
Harshal

> 
> 
> Best regards,
> Krzysztof