[PATCH 0/3] s390/cpufeature: rework to allow different types of cpufeatures

Steffen Eiden
2022-07-12T10:52:33Z

Currently the s390 implementaion of cpufeature is limited to elf_hwcap
bits. Using these to automatically load modules also exposes this
cpufeature to userspace which, sometimes is not intended.

Therefore, rework the s390-cpufeature implementation to allow for
various cpu feature indications, which is not only limited to hwcap bits.

Add a new type to allow facilities to be a cpufeature without using
hwcap bits that expose this feature to userspace.

Load uvdevice when facility 158 is present.

Heiko Carstens (1):
s390/cpufeature: allow for facility bits

Steffen Eiden (2):
s390/cpufeature: rework to allow more than only hwcap bits
s390/uvdevice: autoload module based on CPU facility

arch/s390/crypto/aes_s390.c | 2 +-
arch/s390/crypto/chacha-glue.c | 2 +-
arch/s390/crypto/crc32-vx.c | 2 +-
arch/s390/crypto/des_s390.c | 2 +-
arch/s390/crypto/ghash_s390.c | 2 +-
arch/s390/crypto/prng.c | 2 +-
arch/s390/crypto/sha1_s390.c | 2 +-
arch/s390/crypto/sha256_s390.c | 2 +-
arch/s390/crypto/sha3_256_s390.c | 2 +-
arch/s390/crypto/sha3_512_s390.c | 2 +-
arch/s390/crypto/sha512_s390.c | 2 +-
arch/s390/include/asm/cpufeature.h | 44 +++++++++++++-------
arch/s390/kernel/Makefile | 2 +-
arch/s390/kernel/cpufeature.c | 66 ++++++++++++++++++++++++++++++
arch/s390/kernel/processor.c | 10 -----
drivers/char/hw_random/s390-trng.c | 2 +-
drivers/s390/char/uvdevice.c | 5 +--
drivers/s390/crypto/pkey_api.c | 2 +-
18 files changed, 111 insertions(+), 42 deletions(-)
create mode 100644 arch/s390/kernel/cpufeature.c

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2.35.3