From c91435d95c49f4053b05ba03b41dd7ed0fbd6c71 Mon Sep 17 00:00:00 2001 From: "Aneesh Kumar K.V" Date: Fri, 27 Nov 2020 10:14:22 +0530 Subject: [PATCH] powerpc/book3s64/hash/kuep: Enable KUEP on hash Signed-off-by: Aneesh Kumar K.V Reviewed-by: Sandipan Das Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/20201127044424.40686-21-aneesh.kumar@linux.ibm.com --- arch/powerpc/mm/book3s64/pkeys.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-) diff --git a/arch/powerpc/mm/book3s64/pkeys.c b/arch/powerpc/mm/book3s64/pkeys.c index 9f01c86d2beb..4a3aeddbe0c7 100644 --- a/arch/powerpc/mm/book3s64/pkeys.c +++ b/arch/powerpc/mm/book3s64/pkeys.c @@ -244,7 +244,12 @@ out: #ifdef CONFIG_PPC_KUEP void __init setup_kuep(bool disabled) { - if (disabled || !early_radix_enabled()) + if (disabled) + return; + /* + * On hash if PKEY feature is not enabled, disable KUAP too. + */ + if (!early_radix_enabled() && !early_mmu_has_feature(MMU_FTR_PKEY)) return; if (smp_processor_id() == boot_cpuid) {