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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* This file contains the routines for initializing kernel userspace protection
*/
#include <linux/export.h>
#include <linux/init.h>
#include <linux/printk.h>
#include <linux/smp.h>
#include <asm/kup.h>
#include <asm/smp.h>
#ifdef CONFIG_PPC_KUAP
void setup_kuap(bool disabled)
{
if (disabled) {
if (IS_ENABLED(CONFIG_40x))
disable_kuep = true;
if (smp_processor_id() == boot_cpuid)
cur_cpu_spec->mmu_features &= ~MMU_FTR_KUAP;
return;
}
pr_info("Activating Kernel Userspace Access Protection\n");
prevent_user_access(KUAP_READ_WRITE);
}
#endif
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