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- // SPDX-License-Identifier: GPL-2.0
- /*
- * Copyright (C) 2019 IBM Corporation
- * Author: Nayna Jain
- */
- #include <linux/types.h>
- #include <linux/of.h>
- #include <asm/secure_boot.h>
- static struct device_node *get_ppc_fw_sb_node(void)
- {
- static const struct of_device_id ids[] = {
- { .compatible = "ibm,secureboot", },
- { .compatible = "ibm,secureboot-v1", },
- { .compatible = "ibm,secureboot-v2", },
- {},
- };
- return of_find_matching_node(NULL, ids);
- }
- bool is_ppc_secureboot_enabled(void)
- {
- struct device_node *node;
- bool enabled = false;
- u32 secureboot;
- node = get_ppc_fw_sb_node();
- enabled = of_property_read_bool(node, "os-secureboot-enforcing");
- of_node_put(node);
- if (enabled)
- goto out;
- if (!of_property_read_u32(of_root, "ibm,secure-boot", &secureboot))
- enabled = (secureboot > 1);
- out:
- pr_info("Secure boot mode %s\n", enabled ? "enabled" : "disabled");
- return enabled;
- }
- bool is_ppc_trustedboot_enabled(void)
- {
- struct device_node *node;
- bool enabled = false;
- u32 trustedboot;
- node = get_ppc_fw_sb_node();
- enabled = of_property_read_bool(node, "trusted-enabled");
- of_node_put(node);
- if (enabled)
- goto out;
- if (!of_property_read_u32(of_root, "ibm,trusted-boot", &trustedboot))
- enabled = (trustedboot > 0);
- out:
- pr_info("Trusted boot mode %s\n", enabled ? "enabled" : "disabled");
- return enabled;
- }
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