path: root/drivers/firmware/arm_ffa/driver.c

// SPDX-License-Identifier: GPL-2.0-only
/*
 * Arm Firmware Framework for ARMv8-A(FFA) interface driver
 *
 * The Arm FFA specification[1] describes a software architecture to
 * leverages the virtualization extension to isolate software images
 * provided by an ecosystem of vendors from each other and describes
 * interfaces that standardize communication between the various software
 * images including communication between images in the Secure world and
 * Normal world. Any Hypervisor could use the FFA interfaces to enable
 * communication between VMs it manages.
 *
 * The Hypervisor a.k.a Partition managers in FFA terminology can assign
 * system resources(Memory regions, Devices, CPU cycles) to the partitions
 * and manage isolation amongst them.
 *
 * [1] https://developer.arm.com/docs/den0077/latest
 *
 * Copyright (C) 2021 ARM Ltd.
 */

#define DRIVER_NAME "ARM FF-A"
#define pr_fmt(fmt) DRIVER_NAME ": " fmt

#include <linux/acpi.h>
#include <linux/arm_ffa.h>
#include <linux/bitfield.h>
#include <linux/cpuhotplug.h>
#include <linux/device.h>
#include <linux/hashtable.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/mm.h>
#include <linux/mutex.h>
#include <linux/of_irq.h>
#include <linux/scatterlist.h>
#include <linux/slab.h>
#i