[PATCH v2] arm64: smccc: Add support for SMCCCv1.2 extended input/output registers

[Mark Brown]

On Tue, May 18, 2021 at 05:36:18PM +0100, Sudeep Holla wrote:
> SMCCC v1.2 allows x8-x17 to be used as parameter registers and x4—x17
> to be used as result registers in SMC64/HVC64. Arm Firmware Framework
> for Armv8-A specification makes use of x0-x7 as parameter and result
> registers. There are other users like Hyper-V who intend to use beyond
> x0-x7 as well.

Reviewed-by: Mark Brown <broonie at kernel.org>
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