[PATCH v3 00/10] KVM: s390: Misc fixes

[Claudio Imbrenda <imbrenda@linux.ibm.com>]

Fix a bunch of small issues that came up during the previous round of fixes.

They are mostly extremely unlikely races, but they should be fixed
nonetheless.

v2->v3
* Use READ_ONCE to pair with WRITE_ONCE in the first patch
* Fix leaking PGM_ADDRESSING also in kvm_s390_keyop() and related functions
* Fix and improve commit messages
* Use slots_arch_lock instead of slots_lock for ESSA operations
* Use normal spin_{,un}lock() functions instead of scoped_guard to avoid
  mixing the two styles
* Use the newly introduced vcpu->arch.initialized to determine whether the
  SCA entry needs to be cleared
* Improve handling of -EINTR; handle_mvpg_pei() needed some refactoring to
  deal with it properly
* Three new patches:
  - Free the mmu cache when kvm_arch_vcpu_create() fails
  - Fix ordering when adding to SCA
  - Fix cleanup in kvm_s390_pv_create_cpu()

v1->v2
* Drop some patches that have been picked upstream in the meantime.
* Drop patch 3, as it was trying to fix a bug that does not exist
* Avoid the NULL gmap dereference by using a flag
* Fix the return value of kvm_s390_[gp]et_skeys too
* Use kvm->slots_arch_lock instead of kvm->slots_lock for CMMA and ESSA
  handling, to avoid potential deadlocks with the RCU.
* Three new patches to fix other issues that came out while fixing the
  other issues

Claudio Imbrenda (10):
  KVM: s390: Fix unlikely NULL gmap dereference
  KVM: s390: Fix leaking of PGM_ADDRESSING to userspace
  KVM: s390: Fix race in __do_essa()
  KVM: s390: cmma: Fix dirty tracking when removing memslot
  KVM: s390: ucontrol: Add missing locking around gmap_remove_child()
  KVM: s390: Fix overclearing ESCA in case of error
  KVM: s390: Return -EINTR if a signal was pending while faulting-in
  KVM: s390: Free the mmu cache when kvm_arch_vcpu_create() fails
  KVM: s390: Fix ordering when adding to SCA
  KVM: s390: Fix cleanup in kvm_s390_pv_create_cpu()

 arch/s390/include/asm/kvm_host.h |  1 +
 arch/s390/kvm/dat.c              | 23 ++++++----
 arch/s390/kvm/dat.h              |  2 +-
 arch/s390/kvm/faultin.c          |  4 +-
 arch/s390/kvm/intercept.c        | 18 ++++----
 arch/s390/kvm/interrupt.c        |  2 +-
 arch/s390/kvm/kvm-s390.c         | 72 ++++++++++++++++++++++----------
 arch/s390/kvm/priv.c             | 10 +++--
 arch/s390/kvm/pv.c               | 43 +++++++++----------
 9 files changed, 106 insertions(+), 69 deletions(-)

-- 
2.55.0