[PATCH 3/3] arm64: Add architecture specific ACPI FFH Opregion callbacks

[Catalin Marinas]

On Thu, Jun 16, 2022 at 10:01:06AM +0100, Sudeep Holla wrote:
> FFH Operation Region space can be used to trigger SMC or HVC calls,
> using the Arm SMC Calling Convention (SMCCC). The choice of conduit
> (SMC or HVC) is based on what the kernel choose based on PSCI as with
> any other users of SMCCC within the kernel.
> 
> Function identifiers only the SMCCC SiP Service, OEM Service and FF-A
> specific call range.
> 
> Offset can be either 0(32 bit calling convention) or 1(64 bit calling
> convention). The length must be set with the range applicable based
> on the value of the offset.
> 
> Cc: Catalin Marinas <catalin.marinas at arm.com>
> Cc: Will Deacon <will at kernel.org>
> Signed-off-by: Sudeep Holla <sudeep.holla at arm.com>

Acked-by: Catalin Marinas <catalin.marinas at arm.com>