diff options
| -rw-r--r-- | arch/powerpc/include/asm/mmu.h | 9 | ||||
| -rw-r--r-- | arch/powerpc/mm/book3s64/radix_pgtable.c | 4 |
2 files changed, 12 insertions, 1 deletions
diff --git a/arch/powerpc/include/asm/mmu.h b/arch/powerpc/include/asm/mmu.h index 17cbaf132631..255a1837e9f7 100644 --- a/arch/powerpc/include/asm/mmu.h +++ b/arch/powerpc/include/asm/mmu.h @@ -29,6 +29,11 @@ */ /* + * Support for KUEP feature. + */ +#define MMU_FTR_KUEP ASM_CONST(0x00000400) + +/* * Support for memory protection keys. */ #define MMU_FTR_PKEY ASM_CONST(0x00000800) @@ -189,6 +194,10 @@ enum { #ifdef CONFIG_PPC_MEM_KEYS MMU_FTR_PKEY | #endif +#ifdef CONFIG_PPC_KUEP + MMU_FTR_KUEP | +#endif /* CONFIG_PPC_KUAP */ + 0, }; diff --git a/arch/powerpc/mm/book3s64/radix_pgtable.c b/arch/powerpc/mm/book3s64/radix_pgtable.c index c5bf2ef73c36..3536675dd61e 100644 --- a/arch/powerpc/mm/book3s64/radix_pgtable.c +++ b/arch/powerpc/mm/book3s64/radix_pgtable.c @@ -593,8 +593,10 @@ void setup_kuep(bool disabled) if (disabled || !early_radix_enabled()) return; - if (smp_processor_id() == boot_cpuid) + if (smp_processor_id() == boot_cpuid) { pr_info("Activating Kernel Userspace Execution Prevention\n"); + cur_cpu_spec->mmu_features |= MMU_FTR_KUEP; + } /* * Radix always uses key0 of the IAMR to determine if an access is |