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

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Date:   Tue, 12 Jul 2022 12:52:17 +0200
From:   Steffen Eiden <seiden@...ux.ibm.com>
To:     Heiko Carstens <hca@...ux.ibm.com>,
        Alexander Gordeev <agordeev@...ux.ibm.com>,
        Christian Borntraeger <borntraeger@...ux.ibm.com>,
        Janosch Frank <frankja@...ux.ibm.com>,
        Claudio Imbrenda <imbrenda@...ux.ibm.com>,
        Vasily Gorbik <gor@...ux.ibm.com>, linux-s390@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-mm@...ck.org
Cc:     nrb@...ux.ibm.com
Subject: [PATCH 0/3] s390/cpufeature: rework to allow different types of cpufeatures

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

-- 
2.35.3