Re: [PATCH v3 3/5] KVM: Pass EventNotifier into kvm_irqchip_assign_irqfd

[Alex Williamson <alex.williamson@redhat.com>]

On Tue, 17 Mar 2020 15:50:40 -0400
Peter Xu <peterx@redhat.com> wrote:

> So that kvm_irqchip_assign_irqfd() can have access to the
> EventNotifiers, especially the resample event.  It is needed in follow
> up patch to cache and kick resamplefds from QEMU.
> 
> Reviewed-by: Eric Auger <eric.auger@redhat.com>
> Signed-off-by: Peter Xu <peterx@redhat.com>
> ---
>  accel/kvm/kvm-all.c | 16 ++++++++++------
>  1 file changed, 10 insertions(+), 6 deletions(-)

Reviewed-by: Alex Williamson <alex.williamson@redhat.com>

> diff --git a/accel/kvm/kvm-all.c b/accel/kvm/kvm-all.c
> index 439a4efe52..d49b74512a 100644
> --- a/accel/kvm/kvm-all.c
> +++ b/accel/kvm/kvm-all.c
> @@ -1628,9 +1628,13 @@ int kvm_irqchip_update_msi_route(KVMState *s, int virq, MSIMessage msg,
>      return kvm_update_routing_entry(s, &kroute);
>  }
>  
> -static int kvm_irqchip_assign_irqfd(KVMState *s, int fd, int rfd, int virq,
> +static int kvm_irqchip_assign_irqfd(KVMState *s, EventNotifier *event,
> +                                    EventNotifier *resample, int virq,
>                                      bool assign)
>  {
> +    int fd = event_notifier_get_fd(event);
> +    int rfd = resample ? event_notifier_get_fd(resample) : -1;
> +
>      struct kvm_irqfd irqfd = {
>          .fd = fd,
>          .gsi = virq,
> @@ -1735,7 +1739,9 @@ int kvm_irqchip_add_hv_sint_route(KVMState *s, uint32_t vcpu, uint32_t sint)
>      return -ENOSYS;
>  }
>  
> -static int kvm_irqchip_assign_irqfd(KVMState *s, int fd, int virq, bool assign)
> +static int kvm_irqchip_assign_irqfd(KVMState *s, EventNotifier *event,
> +                                    EventNotifier *resample, int virq,
> +                                    bool assign)
>  {
>      abort();
>  }
> @@ -1749,15 +1755,13 @@ int kvm_irqchip_update_msi_route(KVMState *s, int virq, MSIMessage msg)
>  int kvm_irqchip_add_irqfd_notifier_gsi(KVMState *s, EventNotifier *n,
>                                         EventNotifier *rn, int virq)
>  {
> -    return kvm_irqchip_assign_irqfd(s, event_notifier_get_fd(n),
> -           rn ? event_notifier_get_fd(rn) : -1, virq, true);
> +    return kvm_irqchip_assign_irqfd(s, n, rn, virq, true);
>  }
>  
>  int kvm_irqchip_remove_irqfd_notifier_gsi(KVMState *s, EventNotifier *n,
>                                            int virq)
>  {
> -    return kvm_irqchip_assign_irqfd(s, event_notifier_get_fd(n), -1, virq,
> -           false);
> +    return kvm_irqchip_assign_irqfd(s, n, NULL, virq, false);
>  }
>  
>  int kvm_irqchip_add_irqfd_notifier(KVMState *s, EventNotifier *n,