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brintos / linux-shallow public Read only

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1// SPDX-License-Identifier: GPL-2.0-only2/*3 * Copyright (C) 2021 ARM Ltd.4 */5 6#include <linux/printk.h>7 8#include "common.h"9 10static void __arm_ffa_fn_smc(ffa_value_t args, ffa_value_t *res)11{12	arm_smccc_1_2_smc(&args, res);13}14 15static void __arm_ffa_fn_hvc(ffa_value_t args, ffa_value_t *res)16{17	arm_smccc_1_2_hvc(&args, res);18}19 20int __init ffa_transport_init(ffa_fn **invoke_ffa_fn)21{22	enum arm_smccc_conduit conduit;23 24	if (arm_smccc_get_version() < ARM_SMCCC_VERSION_1_2)25		return -EOPNOTSUPP;26 27	conduit = arm_smccc_1_1_get_conduit();28	if (conduit == SMCCC_CONDUIT_NONE) {29		pr_err("%s: invalid SMCCC conduit\n", __func__);30		return -EOPNOTSUPP;31	}32 33	if (conduit == SMCCC_CONDUIT_SMC)34		*invoke_ffa_fn = __arm_ffa_fn_smc;35	else36		*invoke_ffa_fn = __arm_ffa_fn_hvc;37 38	return 0;39}40