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