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Commit a33fc7a0 authored by Min He's avatar Min He Committed by Zhenyu Wang
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drm/i915/gvt: enter failsafe mode when guest requires more resources 



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: default avatarMin He <min.he@intel.com>
Signed-off-by: default avatarPei Zhang <pei.zhang@intel.com>
Signed-off-by: default avatarZhenyu Wang <zhenyuw@linux.intel.com>
parent d1be371d

drivers/gpu/drm/i915/gvt/gvt.h

+1 −0
Original line number Diff line number Diff line
@@ -453,6 +453,7 @@ struct intel_gvt_ops { 


enum {

	GVT_FAILSAFE_UNSUPPORTED_GUEST,

	GVT_FAILSAFE_INSUFFICIENT_RESOURCE,

};



#include "mpt.h"

drivers/gpu/drm/i915/gvt/handlers.c

+5 −0
Original line number Diff line number Diff line
@@ -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;

	}
@@ -1106,6 +1108,9 @@ 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);