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From: Sergey Fedorov <serge.fdrv@gmail.com>
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Date: Wed, 23 Mar 2016 15:33:25 +0300
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Subject: Re: [Qemu-devel] [Qemu-arm] [PATCH v6 4/4] arm: implement
	query-gic-capabilities
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To: Peter Xu <peterx@redhat.com>, qemu-devel@nongnu.org
Cc: peter.maydell@linaro.org, drjones@redhat.com, libvir-list@redhat.com, armbru@redhat.com, mdroth@linux.vnet.ibm.com, abologna@redhat.com, qemu-arm@nongnu.org

On 23/03/16 08:32, Peter Xu wrote:
> diff --git a/target-arm/monitor.c b/target-arm/monitor.c
> index 254a9c9..4a2db59 100644
> --- a/target-arm/monitor.c
> +++ b/target-arm/monitor.c
> @@ -21,8 +21,66 @@
(snip)
>  GICCapabilityResult *qmp_query_gic_capabilities(Error **errp)
>  {
> -    return NULL;
> +    GICCapabilityResult *result = g_new0(GICCapabilityResult, 1);
> +    GICCapabilityList *head = NULL;
> +    GICCapability *v2 = gic_cap_new(2), *v3 = gic_cap_new(3);
> +
> +    v2->emulated = true;
> +    /* FIXME: we'd change to true after we get emulated GICv3. */

Maybewe'd better use'NOTE:' or 'TODO:' instead of 'FIXME:'?

> +    v3->emulated = false;
> +
> +#ifdef CONFIG_KVM
> +    {
> +        int fdarray[3];
> +
> +        if (!kvm_arm_create_scratch_host_vcpu(NULL, fdarray, NULL)) {
> +            goto out;
> +        }
> +
> +        /* Test KVM GICv2 */
> +        if (kvm_support_device(fdarray[1], KVM_DEV_TYPE_ARM_VGIC_V2)) {
> +            v2->kernel = true;
> +        }
> +
> +        /* Test KVM GICv3 */
> +        if (kvm_support_device(fdarray[1], KVM_DEV_TYPE_ARM_VGIC_V3)) {
> +            v3->kernel = true;
> +        }
> +
> +        kvm_arm_destroy_scratch_host_vcpu(fdarray);
> +out:
> +        ;
> +    }
> +#endif

Probably, it would be neater to put KVM part into a separate static
inline function.

Kind regards,
Sergey

> +
> +    head = gic_cap_list_add(head, v2);
> +    head = gic_cap_list_add(head, v3);
> +
> +    result->capabilities = head;
> +
> +    return result;
>  }