Re: [XEN PATCH v7 01/20] xen/arm: smccc: add support for SMCCCv1.2 extended input/output registers

[Julien Grall <julien@xxxxxxx>]

Hi Jens,

On 22/02/2023 15:32, Jens Wiklander wrote:
> SMCCC v1.2 [1] AArch64 allows x0-x17 to be used as both parameter
> registers and result registers for the SMC and HVC instructions.
>
> Arm Firmware Framework for Armv8-A specification makes use of x0-x7 as
> parameter and result registers.
>
> Let us add new interface to support this extended set of input/output
> registers.
>
> This is based on 3fdc0cb59d97 ("arm64: smccc: Add support for SMCCCv1.2
> extended input/output registers") by Sudeep Holla from the Linux kernel
>
> The SMCCC version reported to the VM is bumped to 1.2 in order to support
> handling FF-A messages.
>
> [1] https://developer.arm.com/documentation/den0028/c/?lang=en
>
> Reviewed-by: Luca Fancellu <luca.fancellu@xxxxxxx>
> Signed-off-by: Jens Wiklander <jens.wiklander@xxxxxxxxxx>
One remark here. The tags are usually added chronologically. So your 
signed-off-by should be first.
I am not planning to commit this patch until one of the patch using the 
call is ready. If this happen in this version, then I am happy to fix it 
on commit. Otherwise, please do it in the next version:
Acked-by: Julien Grall <jgrall@xxxxxxxxxx>

Cheers,

--
Julien Grall