Pull s390 updates from Alexander Gordeev:

 - Fix the style of protected key API driver source: use x-mas tree for
   all local variable declarations

 - Rework protected key API driver to not use the struct pkey_protkey
   and pkey_clrkey anymore. Both structures have a fixed size buffer,
   but with the support of ECC protected key these buffers are not big
   enough. Use dynamic buffers internally and transparently for
   userspace

 - Add support for a new 'non CCA clear key token' with ECC clear keys
   supported: ECC P256, ECC P384, ECC P521, ECC ED25519 and ECC ED448.
   This makes it possible to derive a protected key from the ECC clear
   key input via PKEY_KBLOB2PROTK3 ioctl, while currently the only way
   to derive is via PCKMO instruction

 - The s390 PMU of PAI crypto and extension 1 NNPA counters use atomic_t
   for reference counting. Replace this with the proper data type
   refcount_t

 - Select ARCH_SUPPORTS_INT128, but limit this to clang for now, since
   gcc generates inefficient code, which may lead to stack overflows

 - Replace one-element array with flexible-array member in struct
   vfio_ccw_parent and refactor the rest of the code accordingly. Also,
   prefer struct_size() over sizeof() open- coded versions

 - Introduce OS_INFO_FLAGS_ENTRY pointing to a flags field and
   OS_INFO_FLAG_REIPL_CLEAR flag that informs a dumper whether the
   system memory should be cleared or not once dumped

 - Fix a hang when a user attempts to remove a VFIO-AP mediated device
   attached to a guest: add VFIO_DEVICE_GET_IRQ_INFO and
   VFIO_DEVICE_SET_IRQS IOCTLs and wire up the VFIO bus driver callback
   to request a release of the device

 - Fix calculation for R_390_GOTENT relocations for modules

 - Allow any user space process with CAP_PERFMON capability read and
   display the CPU Measurement facility counter sets

 - Rework large statically-defined per-CPU cpu_cf_events data structure
   and replace it with dynamically allocated structures created when a
   perf_event_open() system call is invoked or /dev/hwctr device is
   accessed

* tag 's390-6.5-1' of git://git.kernel.org/pub/scm/linux/kernel/git/s390/linux:
  s390/cpum_cf: rework PER_CPU_DEFINE of struct cpu_cf_events
  s390/cpum_cf: open access to hwctr device for CAP_PERFMON privileged process
  s390/module: fix rela calculation for R_390_GOTENT
  s390/vfio-ap: wire in the vfio_device_ops request callback
  s390/vfio-ap: realize the VFIO_DEVICE_SET_IRQS ioctl
  s390/vfio-ap: realize the VFIO_DEVICE_GET_IRQ_INFO ioctl
  s390/pkey: add support for ecc clear key
  s390/pkey: do not use struct pkey_protkey
  s390/pkey: introduce reverse x-mas trees
  s390/zcore: conditionally clear memory on reipl
  s390/ipl: add REIPL_CLEAR flag to os_info
  vfio/ccw: use struct_size() helper
  vfio/ccw: replace one-element array with flexible-array member
  s390: select ARCH_SUPPORTS_INT128
  s390/pai_ext: replace atomic_t with refcount_t
  s390/pai_crypto: replace atomic_t with refcount_t