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Date: Tue, 9 Jan 2024 10:05:57 +0100
From: Alexander Gordeev <agordeev@linux.ibm.com>
To: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Heiko Carstens <hca@linux.ibm.com>, Vasily Gorbik <gor@linux.ibm.com>,
        linux-kernel@vger.kernel.org, linux-s390@vger.kernel.org
Subject: [GIT PULL] s390 updates for the 6.8 merge window
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Hello Linus,

Please pull s390 changes for 6.8 merge window.

Please note three KVM commits that were agreed to go via s390 tree
as part of a floating-point unit (FPU) rework:
	KVM: s390: fix setting of fpc register
	KVM: s390: use READ_ONCE() to read fpc register value
	KVM: s390: remove superfluous save_fpu_regs() call

Also, there is revert of defconfigs update that is upstream already
as commit 3d940bb18183 ("s390: update defconfigs"):
	Revert "s390: update defconfigs"
	s390: update defconfigs

Thank you,
Alexander

The following changes since commit 98b1cc82c4affc16f5598d4fa14b1858671b2263:

  Linux 6.7-rc2 (2023-11-19 15:02:14 -0800)

are available in the Git repository at:

  git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux.git tags/s390-6.8-1

for you to fetch changes up to b2b97a62f055dd638f7f02087331a8380d8f139a:

  Revert "s390: update defconfigs" (2023-12-18 10:58:58 +0100)

----------------------------------------------------------------
s390 updates for 6.8 merge window

- Add machine variable capacity information to /proc/sysinfo.

- Limit the waste of page tables and always align vmalloc area size
  and base address on segment boundary.

- Fix a memory leak when an attempt to register interruption sub class
  (ISC) for the adjunct-processor (AP) guest failed.

- Reset response code AP_RESPONSE_INVALID_GISA to understandable
  by guest AP_RESPONSE_INVALID_ADDRESS in response to a failed
  interruption sub class (ISC) registration attempt.

- Improve reaction to adjunct-processor (AP) AP_RESPONSE_OTHERWISE_CHANGED
  response code when enabling interrupts on behalf of a guest.

- Fix incorrect sysfs 'status' attribute of adjunct-processor (AP) queue
  device bound to the vfio_ap device driver when the mediated device is
  attached to a guest, but the queue device is not passed through.

- Rework struct ap_card to hold the whole adjunct-processor (AP) card
  hardware information. As result, all the ugly bit checks are replaced
  by simple evaluations of the required bit fields.

- Improve handling of some weird scenarios between service element (SE)
  host and SE guest with adjunct-processor (AP) pass-through support.

- Change local_ctl_set_bit() and local_ctl_clear_bit() so they return the
  previous value of the to be changed control register. This is useful if
  a bit is only changed temporarily and the previous content needs to be
  restored.

- The kernel starts with machine checks disabled and is expected to enable
  it once trap_init() is called. However the implementation allows machine
  checks early. Consistently enable it in trap_init() only.

- local_mcck_disable() and local_mcck_enable() assume that machine checks
  are always enabled. Instead implement and use local_mcck_save() and
  local_mcck_restore() to disable machine checks and restore the previous
  state.

- Modification of floating point control (FPC) register of a traced
  process using ptrace interface may lead to corruption of the FPC
  register of the tracing process. Fix this.

- kvm_arch_vcpu_ioctl_set_fpu() allows to set the floating point control
  (FPC) register in vCPU, but may lead to corruption of the FPC register
  of the host process. Fix this.

- Use READ_ONCE() to read a vCPU floating point register value from the
  memory mapped area. This avoids that, depending on code generation,
  a different value is tested for validity than the one that is used.

- Get rid of test_fp_ctl(), since it is quite subtle to use it correctly.
  Instead copy a new floating point control register value into its save
  area and test the validity of the new value when loading it.

- Remove superfluous save_fpu_regs() call.

- Remove s390 support for ARCH_WANTS_DYNAMIC_TASK_STRUCT. All machines
  provide the vector facility since many years and the need to make the
  task structure size dependent on the vector facility does not exist.

- Remove the "novx" kernel command line option, as the vector code runs
  without any problems since many years.

- Add the vector facility to the z13 architecture level set (ALS).
  All hypervisors support the vector facility since many years.
  This allows compile time optimizations of the kernel.

- Get rid of MACHINE_HAS_VX and replace it with cpu_has_vx(). As result,
  the compiled code will have less runtime checks and less code.

- Convert pgste_get_lock() and pgste_set_unlock() ASM inlines to C.

- Convert the struct subchannel spinlock from pointer to member.

----------------------------------------------------------------
Alexander Gordeev (2):
      s390/boot: always align vmalloc area on segment boundary
      Revert "s390: update defconfigs"

Anthony Krowiak (2):
      s390/vfio-ap: unpin pages on gisc registration failure
      s390/vfio-ap: set status response code to 06 on gisc registration failure

Claudio Imbrenda (1):
      s390/mm: convert pgste locking functions to C

Halil Pasic (1):
      s390/cio: make sch->lock spinlock pointer a member

Harald Freudenberger (2):
      s390/ap: store TAPQ hwinfo in struct ap_card
      s390/ap: handle outband SE bind state change

Heiko Carstens (13):
      s390/ctlreg: return old register contents when changing bits
      s390/nmi: consistently enable machine checks in trap_init()
      s390/nmi: implement and use local_mcck_save() / local_mcck_restore()
      s390/ptrace: handle setting of fpc register correctly
      KVM: s390: fix setting of fpc register
      KVM: s390: use READ_ONCE() to read fpc register value
      s390/fpu: get rid of test_fp_ctl()
      KVM: s390: remove superfluous save_fpu_regs() call
      s390/fpu: remove ARCH_WANTS_DYNAMIC_TASK_STRUCT support
      s390/fpu: remove "novx" option
      s390/als: add vector facility to z13 architecture level set
      s390/fpu: get rid of MACHINE_HAS_VX
      s390: update defconfigs

Tony Krowiak (2):
      s390/vfio-ap: improve reaction to response code 07 from PQAP(AQIC) command
      s390/vfio-ap: fix sysfs status attribute for AP queue devices

Vasily Gorbik (1):
      s390/sysinfo: add variable capacity information

 arch/s390/Kconfig                    |   1 -
 arch/s390/boot/ipl_parm.c            |   2 +-
 arch/s390/boot/startup.c             |   3 +-
 arch/s390/crypto/chacha-glue.c       |   2 +-
 arch/s390/include/asm/ap.h           |  21 ++--
 arch/s390/include/asm/ctlreg.h       |  24 +++--
 arch/s390/include/asm/fpu/api.h      |  35 +++---
 arch/s390/include/asm/fpu/internal.h |  10 +-
 arch/s390/include/asm/processor.h    |  34 ++++--
 arch/s390/include/asm/setup.h        |   2 -
 arch/s390/include/asm/sysinfo.h      |   4 +
 arch/s390/kernel/compat_signal.c     |  16 ++-
 arch/s390/kernel/crash_dump.c        |   5 +-
 arch/s390/kernel/early.c             |  12 +--
 arch/s390/kernel/fpu.c               |  12 +--
 arch/s390/kernel/machine_kexec.c     |   2 +-
 arch/s390/kernel/nmi.c               |  10 +-
 arch/s390/kernel/perf_regs.c         |   6 +-
 arch/s390/kernel/process.c           |   2 +-
 arch/s390/kernel/processor.c         |   7 +-
 arch/s390/kernel/ptrace.c            |  28 +++--
 arch/s390/kernel/setup.c             |  25 +----
 arch/s390/kernel/signal.c            |  12 +--
 arch/s390/kernel/smp.c               |   6 +-
 arch/s390/kernel/sysinfo.c           |  10 ++
 arch/s390/kernel/traps.c             |  13 ++-
 arch/s390/kernel/vmlinux.lds.S       |   1 +
 arch/s390/kvm/interrupt.c            |   2 +-
 arch/s390/kvm/kvm-s390.c             |  26 ++---
 arch/s390/lib/test_unwind.c          |   6 +-
 arch/s390/mm/pgtable.c               |  27 ++---
 arch/s390/tools/gen_facilities.c     |   1 +
 drivers/s390/cio/chsc.c              |  18 ++--
 drivers/s390/cio/chsc_sch.c          |   6 +-
 drivers/s390/cio/cio.c               |   6 +-
 drivers/s390/cio/cio.h               |   2 +-
 drivers/s390/cio/css.c               |  36 ++-----
 drivers/s390/cio/device.c            |  66 ++++++------
 drivers/s390/cio/device_pgid.c       |  12 +--
 drivers/s390/cio/eadm_sch.c          |  36 +++----
 drivers/s390/cio/vfio_ccw_drv.c      |   8 +-
 drivers/s390/cio/vfio_ccw_fsm.c      |  24 ++---
 drivers/s390/crypto/ap_bus.c         |  72 ++++++-------
 drivers/s390/crypto/ap_bus.h         |  22 +---
 drivers/s390/crypto/ap_card.c        |  18 ++--
 drivers/s390/crypto/ap_queue.c       | 200 +++++++++++++++++++++++------------
 drivers/s390/crypto/vfio_ap_ops.c    |  30 ++++--
 drivers/s390/crypto/zcrypt_api.c     |  16 +--
 drivers/s390/crypto/zcrypt_cex4.c    |  31 +++---
 lib/raid6/s390vx.uc                  |   2 +-
 50 files changed, 517 insertions(+), 455 deletions(-)