| // SPDX-License-Identifier: GPL-2.0-or-later | |
| #include <asm/kup.h> | |
| #include <asm/smp.h> | |
| void setup_kuap(bool disabled) | |
| { | |
| if (!disabled) { | |
| update_user_segments(mfsr(0) | SR_KS); | |
| isync(); /* Context sync required after mtsr() */ | |
| init_mm.context.sr0 |= SR_KS; | |
| current->thread.sr0 |= SR_KS; | |
| } | |
| if (smp_processor_id() != boot_cpuid) | |
| return; | |
| if (disabled) | |
| cur_cpu_spec->mmu_features &= ~MMU_FTR_KUAP; | |
| else | |
| pr_info("Activating Kernel Userspace Access Protection\n"); | |
| } |