2  * Copyright(c) 2011-2017 Intel Corporation. All rights reserved.
27  * intel_vgpu_find_page_track - find page track rcord of guest page
37 	return radix_tree_lookup(&vgpu->page_track_tree, gfn);  in intel_vgpu_find_page_track()
41  * intel_vgpu_register_page_track - register a guest page to be tacked
58 		return -EEXIST;  in intel_vgpu_register_page_track()
62 		return -ENOMEM;  in intel_vgpu_register_page_track()
64 	track->handler = handler;  in intel_vgpu_register_page_track()
65 	track->priv_data = priv;  in intel_vgpu_register_page_track()
67 	ret = radix_tree_insert(&vgpu->page_track_tree, gfn, track);  in intel_vgpu_register_page_track()
73 	return 0;  in intel_vgpu_register_page_track()
77  * intel_vgpu_unregister_page_track - unregister the tracked guest page
87 	track = radix_tree_delete(&vgpu->page_track_tree, gfn);  in intel_vgpu_unregister_page_track()
89 		if (track->tracked)  in intel_vgpu_unregister_page_track()
96  * intel_vgpu_enable_page_track - set write-protection on guest page
110 		return -ENXIO;  in intel_vgpu_enable_page_track()
112 	if (track->tracked)  in intel_vgpu_enable_page_track()
113 		return 0;  in intel_vgpu_enable_page_track()
118 	track->tracked = true;  in intel_vgpu_enable_page_track()
119 	return 0;  in intel_vgpu_enable_page_track()
123  * intel_vgpu_disable_page_track - cancel write-protection on guest page
137 		return -ENXIO;  in intel_vgpu_disable_page_track()
139 	if (!track->tracked)  in intel_vgpu_disable_page_track()
140 		return 0;  in intel_vgpu_disable_page_track()
145 	track->tracked = false;  in intel_vgpu_disable_page_track()
146 	return 0;  in intel_vgpu_disable_page_track()
150  * intel_vgpu_page_track_handler - called when write to write-protected page
152  * @gpa: the gpa of this write
159 int intel_vgpu_page_track_handler(struct intel_vgpu *vgpu, u64 gpa,  in intel_vgpu_page_track_handler()  argument
163 	int ret = 0;  in intel_vgpu_page_track_handler()
165 	page_track = intel_vgpu_find_page_track(vgpu, gpa >> PAGE_SHIFT);  in intel_vgpu_page_track_handler()
167 		return -ENXIO;  in intel_vgpu_page_track_handler()
169 	if (unlikely(vgpu->failsafe)) {  in intel_vgpu_page_track_handler()
171 		intel_gvt_page_track_remove(vgpu, gpa >> PAGE_SHIFT);  in intel_vgpu_page_track_handler()
173 		ret = page_track->handler(page_track, gpa, data, bytes);  in intel_vgpu_page_track_handler()
175 			gvt_err("guest page write error, gpa %llx\n", gpa);  in intel_vgpu_page_track_handler()