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      1 /*	$NetBSD: page_track.h,v 1.2 2021/12/18 23:45:31 riastradh Exp $	*/
      2 
      3 /*
      4  * Copyright(c) 2011-2017 Intel Corporation. All rights reserved.
      5  *
      6  * Permission is hereby granted, free of charge, to any person obtaining a
      7  * copy of this software and associated documentation files (the "Software"),
      8  * to deal in the Software without restriction, including without limitation
      9  * the rights to use, copy, modify, merge, publish, distribute, sublicense,
     10  * and/or sell copies of the Software, and to permit persons to whom the
     11  * Software is furnished to do so, subject to the following conditions:
     12  *
     13  * The above copyright notice and this permission notice (including the next
     14  * paragraph) shall be included in all copies or substantial portions of the
     15  * Software.
     16  *
     17  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
     18  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
     19  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
     20  * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
     21  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
     22  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
     23  * SOFTWARE.
     24  *
     25  */
     26 
     27 #ifndef _GVT_PAGE_TRACK_H_
     28 #define _GVT_PAGE_TRACK_H_
     29 
     30 #include <linux/types.h>
     31 
     32 struct intel_vgpu;
     33 struct intel_vgpu_page_track;
     34 
     35 typedef int (*gvt_page_track_handler_t)(
     36 			struct intel_vgpu_page_track *page_track,
     37 			u64 gpa, void *data, int bytes);
     38 
     39 /* Track record for a write-protected guest page. */
     40 struct intel_vgpu_page_track {
     41 	gvt_page_track_handler_t handler;
     42 	bool tracked;
     43 	void *priv_data;
     44 };
     45 
     46 struct intel_vgpu_page_track *intel_vgpu_find_page_track(
     47 		struct intel_vgpu *vgpu, unsigned long gfn);
     48 
     49 int intel_vgpu_register_page_track(struct intel_vgpu *vgpu,
     50 		unsigned long gfn, gvt_page_track_handler_t handler,
     51 		void *priv);
     52 void intel_vgpu_unregister_page_track(struct intel_vgpu *vgpu,
     53 		unsigned long gfn);
     54 
     55 int intel_vgpu_enable_page_track(struct intel_vgpu *vgpu, unsigned long gfn);
     56 int intel_vgpu_disable_page_track(struct intel_vgpu *vgpu, unsigned long gfn);
     57 
     58 int intel_vgpu_page_track_handler(struct intel_vgpu *vgpu, u64 gpa,
     59 		void *data, unsigned int bytes);
     60 
     61 #endif
     62