[PATCH v6 20/22] powerpc/book3s64/hash/kuep: Enable KUEP on hash
From: Aneesh Kumar K.V <hidden>
Date: 2020-11-25 05:55:37
Subsystem:
linux for powerpc (32-bit and 64-bit), the rest · Maintainers:
Madhavan Srinivasan, Michael Ellerman, Linus Torvalds
Reviewed-by: Sandipan Das <redacted> Signed-off-by: Aneesh Kumar K.V <redacted> --- 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 84f8664ffc47..f029e7bf5ca2 100644
--- a/arch/powerpc/mm/book3s64/pkeys.c
+++ b/arch/powerpc/mm/book3s64/pkeys.c@@ -236,7 +236,12 @@ void __init pkey_early_init_devtree(void) #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) {
--
2.28.0