1 // SPDX-License-Identifier: GPL-2.0-or-later
2
3 #include <asm/kup.h>
4 #include <asm/smp.h>
5
6 void setup_kuap(bool disabled)
7 {
8 if (!disabled) {
9 update_user_segments(mfsr(0) | SR_KS);
10 isync(); /* Context sync required after mtsr() */
11 init_mm.context.sr0 |= SR_KS;
12 current->thread.sr0 |= SR_KS;
13 }
14
15 if (smp_processor_id() != boot_cpuid)
16 return;
17
18 if (disabled)
19 cur_cpu_spec->mmu_features &= ~MMU_FTR_KUAP;
20 else
21 pr_info("Activating Kernel Userspace Access Protection\n");
22 }
23
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