37 lines
663 B
C
37 lines
663 B
C
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// SPDX-License-Identifier: GPL-2.0-or-later
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#include <asm/kup.h>
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#include <asm/smp.h>
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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 kuap_lock_all_ool(void)
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{
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kuap_lock_all();
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}
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EXPORT_SYMBOL(kuap_lock_all_ool);
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void kuap_unlock_all_ool(void)
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{
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kuap_unlock_all();
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}
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EXPORT_SYMBOL(kuap_unlock_all_ool);
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void setup_kuap(bool disabled)
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{
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if (!disabled) {
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kuap_lock_all_ool();
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init_mm.context.sr0 |= SR_KS;
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current->thread.sr0 |= SR_KS;
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}
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if (smp_processor_id() != boot_cpuid)
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return;
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if (disabled)
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static_branch_enable(&disable_kuap_key);
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else
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pr_info("Activating Kernel Userspace Access Protection\n");
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}
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