[PATCH v6 19/22] powerpc/book3s64/hash/kuap: Enable kuap on hash
Christophe Leroy
christophe.leroy at csgroup.eu
Mon Mar 15 23:06:08 AEDT 2021
Le 25/11/2020 à 06:16, Aneesh Kumar K.V a écrit :
> Reviewed-by: Sandipan Das <sandipan at linux.ibm.com>
> Signed-off-by: Aneesh Kumar K.V <aneesh.kumar at linux.ibm.com>
PPC_HAVE_KUAP is only selected on book3s/64 when PPC_RADIX_MMU is selected. Is that normal ?
> ---
> 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 f747d66cc87d..84f8664ffc47 100644
> --- a/arch/powerpc/mm/book3s64/pkeys.c
> +++ b/arch/powerpc/mm/book3s64/pkeys.c
> @@ -257,7 +257,12 @@ void __init setup_kuep(bool disabled)
> #ifdef CONFIG_PPC_KUAP
> void __init setup_kuap(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) {
>
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