34 lines
719 B
C
34 lines
719 B
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* This file contains the routines for initializing kernel userspace protection
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*/
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#include <linux/export.h>
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#include <linux/init.h>
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#include <linux/jump_label.h>
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#include <linux/printk.h>
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#include <linux/smp.h>
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#include <asm/kup.h>
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#include <asm/smp.h>
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#ifdef CONFIG_PPC_KUAP
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struct static_key_false disable_kuap_key;
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EXPORT_SYMBOL(disable_kuap_key);
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void setup_kuap(bool disabled)
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{
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if (disabled) {
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if (IS_ENABLED(CONFIG_40x))
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disable_kuep = true;
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if (smp_processor_id() == boot_cpuid)
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static_branch_enable(&disable_kuap_key);
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return;
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}
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pr_info("Activating Kernel Userspace Access Protection\n");
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__prevent_user_access(KUAP_READ_WRITE);
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}
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#endif
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