[PATCH 0/4] x86/x86: KVM: Fixes for KVM's PI wakeup handler

[Sean Christopherson]

Two fixes and two cleanups related to KVM's posted interrupt wakeup
handler.  Fix #1 ensures any in-flight IRQs finish after changing the
handler.  Fix #2 actually uninstalls KVM's handler so that a spurious IRQ
won't jump into a freed module.

AFAIK, no one has actually hit these bugs as it would require a really
spurious IRQ, or a bug+race elsehwere that caused a device to post an
interrupt well after a KVM guest is torn down.

Sean Christopherson (4):
  x86/irq: Ensure PI wakeup handler is unregistered before module unload
  KVM: VMX: Unregister posted interrupt wakeup handler on hardware
    unsetup
  x86/irq: KVM: Harden posted interrupt (un)registration paths
  KVM: VMX: Register posted interrupt wakeup handler iff APICv is
    enabled

 arch/x86/include/asm/irq.h |  3 ++-
 arch/x86/kernel/irq.c      | 30 +++++++++++++++++++++---------
 arch/x86/kvm/vmx/vmx.c     |  9 +++++++--
 3 files changed, 30 insertions(+), 12 deletions(-)

-- 
2.33.0.882.g93a45727a2-goog