Re: [PATCH 2/3] s390/cpufeature: allow for facility bits

Claudio Imbrenda
2022-07-12T16:50:31Z

On Tue, 12 Jul 2022 12:52:19 +0200
Steffen Eiden <seiden@linux.ibm.com> wrote:

> From: Heiko Carstens <hca@linux.ibm.com>
>
> Allow for facility bits to be used in cpu features.
>
> Signed-off-by: Heiko Carstens <hca@linux.ibm.com>

Reviewed-by: Claudio Imbrenda <imbrenda@linux.ibm.com>

> ---
> arch/s390/kernel/cpufeature.c | 3 +++
> 1 file changed, 3 insertions(+)
>
> diff --git a/arch/s390/kernel/cpufeature.c b/arch/s390/kernel/cpufeature.c
> index ea4bbfd855db..e70b29804db4 100644
> --- a/arch/s390/kernel/cpufeature.c
> +++ b/arch/s390/kernel/cpufeature.c
> @@ -10,6 +10,7 @@
>
> enum {
> TYPE_HWCAP,
> + TYPE_FACILITY,
> };
>
> struct s390_cpu_feature {
> @@ -54,6 +55,8 @@ int cpu_have_feature(unsigned int num)
> switch (feature->type) {
> case TYPE_HWCAP:
> return !!(elf_hwcap & (1UL << feature->num));
> + case TYPE_FACILITY:
> + return test_facility(feature->num);
> default:
> WARN_ON_ONCE(1);
> return 0;