[PATCH v5 1/6] arm64: rsi: Add RSI host call structure and helper function

[Catalin Marinas]

On Fri, Oct 02, 2026 at 02:57:20PM -0700, Kameron Carr wrote:
> Add struct rsi_host_call to arm-smccc-rsi.h, which represents the host
> call data structure used by the Realm Management Monitor (RMM) for the
> RSI_HOST_CALL interface. The structure contains a 16-bit immediate field
> and 31 general-purpose register values, aligned to 256 bytes as required
> by the CCA RMM specification.
> 
> Add rsi_host_call() static inline wrapper in arm-rsi-cmds.h that invokes
> SMC_RSI_HOST_CALL with the physical address of the host call structure.
> This will be used by Hyper-V guest code to route hypercalls through the
> RSI interface when running inside an Arm CCA Realm.
> 
> Reviewed-by: Michael Kelley <mhklinux at outlook.com>
> Signed-off-by: Kameron Carr <kameroncarr at linux.microsoft.com>

This looks fine.

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