Re: [Qemu-devel] [PATCH V3 3/6] KVM: add support for any length io eventfd

[Paolo Bonzini <pbonzini@redhat.com>]

On 06/11/2015 09:02, Jason Wang wrote:
> Signed-off-by: Jason Wang <jasowang@redhat.com>
> ---
>  include/sysemu/kvm.h | 8 ++++++++
>  kvm-all.c            | 4 ++++
>  kvm-stub.c           | 1 +
>  3 files changed, 13 insertions(+)
> 
> diff --git a/include/sysemu/kvm.h b/include/sysemu/kvm.h
> index 4ac6176..b31f325 100644
> --- a/include/sysemu/kvm.h
> +++ b/include/sysemu/kvm.h
> @@ -53,6 +53,7 @@ extern bool kvm_gsi_routing_allowed;
>  extern bool kvm_gsi_direct_mapping;
>  extern bool kvm_readonly_mem_allowed;
>  extern bool kvm_direct_msi_allowed;
> +extern bool kvm_ioeventfd_any_length_allowed;
>  
>  #if defined CONFIG_KVM || !defined NEED_CPU_H
>  #define kvm_enabled()           (kvm_allowed)
> @@ -153,6 +154,12 @@ extern bool kvm_direct_msi_allowed;
>   */
>  #define kvm_direct_msi_enabled() (kvm_direct_msi_allowed)
>  
> +/**
> + * kvm_ioeventfd_any_length_enabled:
> + * Returns: true if KVM allows any length io eventfd.
> + */
> +#define kvm_ioeventfd_any_length_enabled() (kvm_ioeventfd_any_length_allowed)
> +
>  #else
>  #define kvm_enabled()           (0)
>  #define kvm_irqchip_in_kernel() (false)
> @@ -166,6 +173,7 @@ extern bool kvm_direct_msi_allowed;
>  #define kvm_gsi_direct_mapping() (false)
>  #define kvm_readonly_mem_enabled() (false)
>  #define kvm_direct_msi_enabled() (false)
> +#define kvm_ioeventfd_any_length_enabled() (false)
>  #endif
>  
>  struct kvm_run;
> diff --git a/kvm-all.c b/kvm-all.c
> index 1bc1273..f4e2cf0 100644
> --- a/kvm-all.c
> +++ b/kvm-all.c
> @@ -109,6 +109,7 @@ bool kvm_allowed;
>  bool kvm_readonly_mem_allowed;
>  bool kvm_vm_attributes_allowed;
>  bool kvm_direct_msi_allowed;
> +bool kvm_ioeventfd_any_length_allowed;
>  
>  static const KVMCapabilityInfo kvm_required_capabilites[] = {
>      KVM_CAP_INFO(USER_MEMORY),
> @@ -1612,6 +1613,9 @@ static int kvm_init(MachineState *ms)
>      kvm_vm_attributes_allowed =
>          (kvm_check_extension(s, KVM_CAP_VM_ATTRIBUTES) > 0);
>  
> +    kvm_ioeventfd_any_length_allowed =
> +        (kvm_check_extension(s, KVM_CAP_IOEVENTFD_ANY_LENGTH) > 0);
> +
>      ret = kvm_arch_init(ms, s);
>      if (ret < 0) {
>          goto err;
> diff --git a/kvm-stub.c b/kvm-stub.c
> index a5051f7..dc97a5e 100644
> --- a/kvm-stub.c
> +++ b/kvm-stub.c
> @@ -30,6 +30,7 @@ bool kvm_gsi_routing_allowed;
>  bool kvm_gsi_direct_mapping;
>  bool kvm_allowed;
>  bool kvm_readonly_mem_allowed;
> +bool kvm_ioeventfd_any_length_allowed;
>  
>  int kvm_init_vcpu(CPUState *cpu)
>  {
> 

Acked-by: Paolo Bonzini <pbonzini@redhat.com>