[PATCH v3] drm/i915/gvt: enter failsafe mode when guest requires more resources

[Zhenyu Wang]

On 2017.02.17 16:42:38 +0800, Min He wrote:
> Windows guest will notitfy GVT-g to request more resources through g2v
> interface, when its resources are not enough.
> This patch is to handle this case and let vgpu enter failsafe mode to
> avoid too many error messages.
> 
> Signed-off-by: Min He <min.he at intel.com>
> Signed-off-by: Pei Zhang <pei.zhang at intel.com>
> ---

applied, thanks!

>  drivers/gpu/drm/i915/gvt/gvt.h      | 1 +
>  drivers/gpu/drm/i915/gvt/handlers.c | 5 +++++
>  2 files changed, 6 insertions(+)
> 
> diff --git a/drivers/gpu/drm/i915/gvt/gvt.h b/drivers/gpu/drm/i915/gvt/gvt.h
> index 778f396..ce67430 100644
> --- a/drivers/gpu/drm/i915/gvt/gvt.h
> +++ b/drivers/gpu/drm/i915/gvt/gvt.h
> @@ -453,6 +453,7 @@ struct intel_gvt_ops {
>  
>  enum {
>  	GVT_FAILSAFE_UNSUPPORTED_GUEST,
> +	GVT_FAILSAFE_INSUFFICIENT_RESOURCE,
>  };
>  
>  #include "mpt.h"
> diff --git a/drivers/gpu/drm/i915/gvt/handlers.c b/drivers/gpu/drm/i915/gvt/handlers.c
> index 6f098bb..9fce572 100644
> --- a/drivers/gpu/drm/i915/gvt/handlers.c
> +++ b/drivers/gpu/drm/i915/gvt/handlers.c
> @@ -157,6 +157,8 @@ static void enter_failsafe_mode(struct intel_vgpu *vgpu, int reason)
>  	case GVT_FAILSAFE_UNSUPPORTED_GUEST:
>  		pr_err("Detected your guest driver doesn't support GVT-g.\n");
>  		break;
> +	case GVT_FAILSAFE_INSUFFICIENT_RESOURCE:
> +		pr_err("Graphics resource is not enough for the guest\n");
>  	default:
>  		break;
>  	}
> @@ -1103,6 +1105,9 @@ static int pvinfo_mmio_write(struct intel_vgpu *vgpu, unsigned int offset,
>  	case _vgtif_reg(execlist_context_descriptor_lo):
>  	case _vgtif_reg(execlist_context_descriptor_hi):
>  		break;
> +	case _vgtif_reg(rsv5[0])..._vgtif_reg(rsv5[3]):
> +		enter_failsafe_mode(vgpu, GVT_FAILSAFE_INSUFFICIENT_RESOURCE);
> +		break;
>  	default:
>  		gvt_err("invalid pvinfo write offset %x bytes %x data %x\n",
>  				offset, bytes, data);
> -- 
> 1.9.1
> 
> _______________________________________________
> intel-gvt-dev mailing list
> intel-gvt-dev at lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/intel-gvt-dev

-- 
Open Source Technology Center, Intel ltd.

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