[GIT PULL] Final batch of KVM changes for Linux 5.3.

[Paolo Bonzini]

Linus,

The following changes since commit a7f89616b7376495424f682b6086e0c391a89a1d:

  Merge branch 'for-5.3-fixes' of git://git.kernel.org/pub/scm/linux/kernel/git/tj/cgroup (2019-09-13 09:52:01 +0100)

are available in the git repository at:


  https://git.kernel.org/pub/scm/virt/kvm/kvm.git tags/for-linus

for you to fetch changes up to a9c20bb0206ae9384bd470a6832dd8913730add9:

  Merge tag 'kvm-s390-master-5.3-1' of git://git.kernel.org/pub/scm/linux/kernel/git/kvms390/linux into kvm-master (2019-09-14 09:25:30 +0200)

----------------------------------------------------------------

The main change here is a revert of reverts.  We recently simplified some
code that was thought unnecessary; however, since then KVM has grown quite
a few cond_resched()s and for that reason the simplified code is prone to
livelocks---one CPUs tries to empty a list of guest page tables while the
others keep adding to them.  This adds back the generation-based zapping of
guest page tables, which was not unnecessary after all.

On top of this, there is a fix for a kernel memory leak and a couple of
s390 fixlets as well.

----------------------------------------------------------------
Fuqian Huang (1):
      KVM: x86: work around leak of uninitialized stack contents

Igor Mammedov (1):
      KVM: s390: kvm_s390_vm_start_migration: check dirty_bitmap before using it as target for memset()

Paolo Bonzini (2):
      KVM: nVMX: handle page fault in vmread
      Merge tag 'kvm-s390-master-5.3-1' of git://git.kernel.org/.../kvms390/linux into kvm-master

Sean Christopherson (1):
      KVM: x86/mmu: Reintroduce fast invalidate/zap for flushing memslot

Thomas Huth (1):
      KVM: s390: Do not leak kernel stack data in the KVM_S390_INTERRUPT ioctl

 arch/s390/kvm/interrupt.c       |  10 ++++
 arch/s390/kvm/kvm-s390.c        |   4 +-
 arch/x86/include/asm/kvm_host.h |   2 +
 arch/x86/kvm/mmu.c              | 101 +++++++++++++++++++++++++++++++++++++++-
 arch/x86/kvm/vmx/nested.c       |   4 +-
 arch/x86/kvm/x86.c              |   7 +++
 6 files changed, 124 insertions(+), 4 deletions(-)