RE: [PATCH v5 4/6] kvm: irqchip: extract kvm_irqchip_add_deferred_msi_route

["Longpeng (Mike, Cloud Infrastructure Service Product Dept.)" <longpeng2@huawei.com>]

Hi Paolo,

Ping...

Do you have any suggestions about this change ? It seems Alex has no
objection on this series now, but we need your ACK, thanks.


> -----Original Message-----
> From: Longpeng (Mike, Cloud Infrastructure Service Product Dept.)
> Sent: Wednesday, November 3, 2021 4:17 PM
> To: alex.williamson@redhat.com; pbonzini@redhat.com
> Cc: qemu-devel@nongnu.org; kvm@vger.kernel.org; Gonglei (Arei)
> <arei.gonglei@huawei.com>; Longpeng (Mike, Cloud Infrastructure Service
> Product Dept.) <longpeng2@huawei.com>
> Subject: [PATCH v5 4/6] kvm: irqchip: extract
> kvm_irqchip_add_deferred_msi_route
> 
> Extract a common helper that add MSI route for specific vector
> but does not commit immediately.
> 
> Signed-off-by: Longpeng(Mike) <longpeng2@huawei.com>
> ---
>  accel/kvm/kvm-all.c  | 15 +++++++++++++--
>  include/sysemu/kvm.h |  6 ++++++
>  2 files changed, 19 insertions(+), 2 deletions(-)
> 
> diff --git a/accel/kvm/kvm-all.c b/accel/kvm/kvm-all.c
> index db8d83b..8627f7c 100644
> --- a/accel/kvm/kvm-all.c
> +++ b/accel/kvm/kvm-all.c
> @@ -1953,7 +1953,7 @@ int kvm_irqchip_send_msi(KVMState *s, MSIMessage msg)
>      return kvm_set_irq(s, route->kroute.gsi, 1);
>  }
> 
> -int kvm_irqchip_add_msi_route(KVMState *s, int vector, PCIDevice *dev)
> +int kvm_irqchip_add_deferred_msi_route(KVMState *s, int vector, PCIDevice
> *dev)
>  {
>      struct kvm_irq_routing_entry kroute = {};
>      int virq;
> @@ -1996,7 +1996,18 @@ int kvm_irqchip_add_msi_route(KVMState *s, int vector,
> PCIDevice *dev)
> 
>      kvm_add_routing_entry(s, &kroute);
>      kvm_arch_add_msi_route_post(&kroute, vector, dev);
> -    kvm_irqchip_commit_routes(s);
> +
> +    return virq;
> +}
> +
> +int kvm_irqchip_add_msi_route(KVMState *s, int vector, PCIDevice *dev)
> +{
> +    int virq;
> +
> +    virq = kvm_irqchip_add_deferred_msi_route(s, vector, dev);
> +    if (virq >= 0) {
> +        kvm_irqchip_commit_routes(s);
> +    }
> 
>      return virq;
>  }
> diff --git a/include/sysemu/kvm.h b/include/sysemu/kvm.h
> index a1ab1ee..8de0d9a 100644
> --- a/include/sysemu/kvm.h
> +++ b/include/sysemu/kvm.h
> @@ -476,6 +476,12 @@ void kvm_init_cpu_signals(CPUState *cpu);
>   * @return: virq (>=0) when success, errno (<0) when failed.
>   */
>  int kvm_irqchip_add_msi_route(KVMState *s, int vector, PCIDevice *dev);
> +/**
> + * Add MSI route for specific vector but does not commit to KVM
> + * immediately
> + */
> +int kvm_irqchip_add_deferred_msi_route(KVMState *s, int vector,
> +                                       PCIDevice *dev);
>  int kvm_irqchip_update_msi_route(KVMState *s, int virq, MSIMessage msg,
>                                   PCIDevice *dev);
>  void kvm_irqchip_commit_routes(KVMState *s);
> --
> 1.8.3.1