linux-kernel - [GIT PULL] s390 fixes for 6.17-rc3

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Message-ID: <20250822123608.142112A72-agordeev@linux.ibm.com>
Date: Fri, 22 Aug 2025 14:36:08 +0200
From: Alexander Gordeev <agordeev@...ux.ibm.com>
To: Linus Torvalds <torvalds@...ux-foundation.org>
Cc: Vasily Gorbik <gor@...ux.ibm.com>, Heiko Carstens <hca@...ux.ibm.com>,
        linux-s390@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [GIT PULL] s390 fixes for 6.17-rc3

Hi Linus,

please pull s390 fixes for 6.17-rc3.

Thanks,
Alexander

The following changes since commit c17b750b3ad9f45f2b6f7e6f7f4679844244f0b9:

  Linux 6.17-rc2 (2025-08-17 15:22:10 -0700)

are available in the Git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux.git tags/s390-6.17-3

for you to fetch changes up to 3868f910440c47cd5d158776be4ba4e2186beda7:

  s390/hypfs: Enable limited access during lockdown (2025-08-21 17:46:14 +0200)

----------------------------------------------------------------
s390 fixes for 6.17-rc3

- When kernel lockdown is active userspace tools that rely on read
  operations only are unnecessarily blocked. Fix that by avoiding
  ioctl registration during lockdown

- Invalid NULL pointer accesses succeed due to the lowcore is always
  mapped the identity mapping pinned to zero. To fix that never map
  the first two pages of physical memory with identity mapping

- Fix invalid SCCB present check in the SCLP interrupt handler

- Update defconfigs

----------------------------------------------------------------
Heiko Carstens (3):
      s390/configs: Update defconfigs
      s390/configs: Set HZ=1000
      s390/mm: Do not map lowcore with identity mapping

Peter Oberparleiter (3):
      s390/sclp: Fix SCCB present check
      s390/hypfs: Avoid unnecessary ioctl registration in debugfs
      s390/hypfs: Enable limited access during lockdown

 arch/s390/boot/vmem.c                |  3 +++
 arch/s390/configs/debug_defconfig    | 33 ++++++++++++++++-----------------
 arch/s390/configs/defconfig          | 34 +++++++++++++++-------------------
 arch/s390/configs/zfcpdump_defconfig |  3 ++-
 arch/s390/hypfs/hypfs_dbfs.c         | 19 ++++++++++++-------
 drivers/s390/char/sclp.c             | 11 +++++++++--
 6 files changed, 57 insertions(+), 46 deletions(-)