Chenyi Qiang ed2351174e
KVM: x86: Extend KVM_{G,S}ET_VCPU_EVENTS to support pending triple fault ...
For the triple fault sythesized by KVM, e.g. the RSM path or
nested_vmx_abort(), if KVM exits to userspace before the request is
serviced, userspace could migrate the VM and lose the triple fault.
Extend KVM_{G,S}ET_VCPU_EVENTS to support pending triple fault with a
new event KVM_VCPUEVENT_VALID_FAULT_FAULT so that userspace can save and
restore the triple fault event. This extension is guarded by a new KVM
capability KVM_CAP_TRIPLE_FAULT_EVENT.
Note that in the set_vcpu_events path, userspace is able to set/clear
the triple fault request through triple_fault.pending field.
Signed-off-by: Chenyi Qiang <chenyi.qiang@intel.com >
Message-Id: <20220524135624.22988-2-chenyi.qiang@intel.com >
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com >
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ed2351174e