1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * Copyright (C) 2019 IBM Corporation 4 * Author: Nayna Jain 5 */ 6 #include <linux/types.h> 7 #include <linux/of.h> 8 #include <asm/secure_boot.h> 9 10 static struct device_node *get_ppc_fw_sb_node(void) 11 { 12 static const struct of_device_id ids[] = { 13 { .compatible = "ibm,secureboot", }, 14 { .compatible = "ibm,secureboot-v1", }, 15 { .compatible = "ibm,secureboot-v2", }, 16 {}, 17 }; 18 19 return of_find_matching_node(NULL, ids); 20 } 21 22 bool is_ppc_secureboot_enabled(void) 23 { 24 struct device_node *node; 25 bool enabled = false; 26 27 node = get_ppc_fw_sb_node(); 28 enabled = of_property_read_bool(node, "os-secureboot-enforcing"); 29 30 of_node_put(node); 31 32 pr_info("Secure boot mode %s\n", enabled ? "enabled" : "disabled"); 33 34 return enabled; 35 } 36 37 bool is_ppc_trustedboot_enabled(void) 38 { 39 struct device_node *node; 40 bool enabled = false; 41 42 node = get_ppc_fw_sb_node(); 43 enabled = of_property_read_bool(node, "trusted-enabled"); 44 45 of_node_put(node); 46 47 pr_info("Trusted boot mode %s\n", enabled ? "enabled" : "disabled"); 48 49 return enabled; 50 } 51