• Marcelo Tosatti's avatar
    KVM: use smp_send_reschedule in kvm_vcpu_kick · 32f88400
    Marcelo Tosatti authored
    KVM uses a function call IPI to cause the exit of a guest running on a
    physical cpu. For virtual interrupt notification there is no need to
    wait on IPI receival, or to execute any function.
    
    This is exactly what the reschedule IPI does, without the overhead
    of function IPI. So use it instead of smp_call_function_single in
    kvm_vcpu_kick.
    
    Also change the "guest_mode" variable to a bit in vcpu->requests, and
    use that to collapse multiple IPI's that would be issued between the
    first one and zeroing of guest mode.
    
    This allows kvm_vcpu_kick to called with interrupts disabled.
    Signed-off-by: default avatarMarcelo Tosatti <mtosatti@redhat.com>
    Signed-off-by: default avatarAvi Kivity <avi@redhat.com>
    32f88400
kvm-ia64.c 44.9 KB