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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;
node = of_find_node_by_path("/");
if (!of_property_read_u32(node, "ibm,secure-boot", &secureboot))
enabled = (secureboot > 1);
of_node_put(node);
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;
node = of_find_node_by_path("/");
if (!of_property_read_u32(node, "ibm,trusted-boot", &trustedboot))
enabled = (trustedboot > 0);
of_node_put(node);
out:
pr_info("Trusted boot mode %s\n", enabled ? "enabled" : "disabled");
return enabled;
}
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