Re: [Qemu-devel] [PATCH RFC 3/4] First bits of vGICv3 support:

[Christoffer Dall <christoffer.dall@linaro.org>]

Hi Pavel,

Please get rid of the trailing colon in the subject message. 

On Fri, May 22, 2015 at 01:58:43PM +0300, Pavel Fedin wrote:
> - Make use of kernel_irqchip_type in kvm_arch_irqchip_create()
> - Instantiate "kvm-arm-gicv3" class (not implemented yet) for GICv3 with KVM acceleration

I feel like these bullets should be written as paragraphs with a proper
explanation of what we are doing here from a high-level point of view.

Thanks,
-Christoffer

> 
> Signed-off-by: Pavel Fedin <p.fedin@samsung.com>
> ---
>  hw/arm/virt.c        | 6 ++----
>  include/sysemu/kvm.h | 3 ++-
>  kvm-all.c            | 2 +-
>  stubs/kvm.c          | 2 +-
>  target-arm/kvm.c     | 8 ++++++--
>  5 files changed, 12 insertions(+), 9 deletions(-)
> 
> diff --git a/hw/arm/virt.c b/hw/arm/virt.c
> index 15724b2..1e42e59 100644
> --- a/hw/arm/virt.c
> +++ b/hw/arm/virt.c
> @@ -400,11 +400,9 @@ static uint32_t create_gic(const VirtBoardInfo *vbi, qemu_irq *pic, int type)
>      int i;
>  
>      if (type == KVM_DEV_TYPE_ARM_VGIC_V3) {
> -        gictype = "arm_gicv3";
> -    } else if (kvm_irqchip_in_kernel()) {
> -        gictype = "kvm-arm-gic";
> +        gictype = kvm_irqchip_in_kernel() ? "kvm-arm-gicv3" : "arm_gicv3";
>      } else {
> -        gictype = "arm_gic";
> +        gictype = kvm_irqchip_in_kernel() ? "kvm-arm-gic" : "arm_gic";
>      }
>  
>      gicdev = qdev_create(NULL, gictype);
> diff --git a/include/sysemu/kvm.h b/include/sysemu/kvm.h
> index 4878959..5d90257 100644
> --- a/include/sysemu/kvm.h
> +++ b/include/sysemu/kvm.h
> @@ -424,6 +424,7 @@ void kvm_init_irq_routing(KVMState *s);
>  /**
>   * kvm_arch_irqchip_create:
>   * @KVMState: The KVMState pointer
> + * @type: irqchip type, architecture-specific
>   *
>   * Allow architectures to create an in-kernel irq chip themselves.
>   *
> @@ -431,7 +432,7 @@ void kvm_init_irq_routing(KVMState *s);
>   *            0: irq chip was not created
>   *          > 0: irq chip was created
>   */
> -int kvm_arch_irqchip_create(KVMState *s);
> +int kvm_arch_irqchip_create(KVMState *s, int type);
>  
>  /**
>   * kvm_set_one_reg - set a register value in KVM via KVM_SET_ONE_REG ioctl
> diff --git a/kvm-all.c b/kvm-all.c
> index 17a3771..22e2621 100644
> --- a/kvm-all.c
> +++ b/kvm-all.c
> @@ -1393,7 +1393,7 @@ static int kvm_irqchip_create(MachineState *machine, KVMState *s)
>  
>      /* First probe and see if there's a arch-specific hook to create the
>       * in-kernel irqchip for us */
> -    ret = kvm_arch_irqchip_create(s);
> +    ret = kvm_arch_irqchip_create(s, machine->kernel_irqchip_type);
>      if (ret < 0) {
>          return ret;
>      } else if (ret == 0) {
> diff --git a/stubs/kvm.c b/stubs/kvm.c
> index e7c60b6..a8505ff 100644
> --- a/stubs/kvm.c
> +++ b/stubs/kvm.c
> @@ -1,7 +1,7 @@
>  #include "qemu-common.h"
>  #include "sysemu/kvm.h"
>  
> -int kvm_arch_irqchip_create(KVMState *s)
> +int kvm_arch_irqchip_create(KVMState *s, int type)
>  {
>      return 0;
>  }
> diff --git a/target-arm/kvm.c b/target-arm/kvm.c
> index 16abbf1..65794cf 100644
> --- a/target-arm/kvm.c
> +++ b/target-arm/kvm.c
> @@ -579,7 +579,7 @@ void kvm_arch_init_irq_routing(KVMState *s)
>  {
>  }
>  
> -int kvm_arch_irqchip_create(KVMState *s)
> +int kvm_arch_irqchip_create(KVMState *s, int type)
>  {
>      int ret;
>  
> @@ -587,11 +587,15 @@ int kvm_arch_irqchip_create(KVMState *s)
>       * let the device do this when it initializes itself, otherwise we
>       * fall back to the old API */
>  
> -    ret = kvm_create_device(s, KVM_DEV_TYPE_ARM_VGIC_V2, true);
> +    ret = kvm_create_device(s, type, true);
>      if (ret == 0) {
>          return 1;
>      }
>  
> +    /* Fallback will create VGIC v2 */
> +    if (type != KVM_DEV_TYPE_ARM_VGIC_V2) {
> +        return ret;
> +    }
>      return 0;
>  }
>  
> -- 
> 1.9.5.msysgit.0
> 
>