| // SPDX-License-Identifier: GPL-2.0-only |
| /* |
| * Copyright (C) 2021 ARM Ltd. |
| */ |
| |
| #include <linux/printk.h> |
| |
| #include "common.h" |
| |
| static void __arm_ffa_fn_smc(ffa_value_t args, ffa_value_t *res) |
| { |
| arm_smccc_1_2_smc(&args, res); |
| } |
| |
| static void __arm_ffa_fn_hvc(ffa_value_t args, ffa_value_t *res) |
| { |
| arm_smccc_1_2_hvc(&args, res); |
| } |
| |
| int __init ffa_transport_init(ffa_fn **invoke_ffa_fn) |
| { |
| enum arm_smccc_conduit conduit; |
| |
| if (arm_smccc_get_version() < ARM_SMCCC_VERSION_1_2) |
| return -EOPNOTSUPP; |
| |
| conduit = arm_smccc_1_1_get_conduit(); |
| if (conduit == SMCCC_CONDUIT_NONE) { |
| pr_err("%s: invalid SMCCC conduit\n", __func__); |
| return -EOPNOTSUPP; |
| } |
| |
| if (conduit == SMCCC_CONDUIT_SMC) |
| *invoke_ffa_fn = __arm_ffa_fn_smc; |
| else |
| *invoke_ffa_fn = __arm_ffa_fn_hvc; |
| |
| return 0; |
| } |