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(-)
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2.33.0.882.g93a45727a2-goog
