drm/i915/gvt: devirtualize ->{enable,disable}_page_track

Just call the kvmgt functions directly.
Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Zhi Wang <zhi.a.wang@intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/20220411141403.86980-21-hch@lst.deReviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Reviewed-by: Zhi Wang <zhi.a.wang@intel.com>

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

@@ -765,6 +765,9 @@ void intel_gvt_debugfs_remove_vgpu(struct intel_vgpu *vgpu);
 void intel_gvt_debugfs_init(struct intel_gvt *gvt);
 void intel_gvt_debugfs_clean(struct intel_gvt *gvt);
 
+int intel_gvt_page_track_add(struct intel_vgpu *info, u64 gfn);
+int intel_gvt_page_track_remove(struct intel_vgpu *info, u64 gfn);
+
 #include "trace.h"
 #include "mpt.h"
 

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

@@ -45,8 +45,6 @@ struct intel_vgpu;
 struct intel_gvt_mpt {
 	int (*host_init)(struct device *dev, void *gvt);
 	void (*host_exit)(struct device *dev, void *gvt);
-	int (*enable_page_track)(struct intel_vgpu *vgpu, u64 gfn);
-	int (*disable_page_track)(struct intel_vgpu *vgpu, u64 gfn);
 
 	int (*dma_map_guest_page)(struct intel_vgpu *vgpu, unsigned long gfn,
 				  unsigned long size, dma_addr_t *dma_addr);

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

@@ -1702,7 +1702,7 @@ static void kvmgt_host_exit(struct device *dev, void *gvt)
 	intel_gvt_cleanup_vgpu_type_groups((struct intel_gvt *)gvt);
 }
 
-static int kvmgt_page_track_add(struct intel_vgpu *info, u64 gfn)
+int intel_gvt_page_track_add(struct intel_vgpu *info, u64 gfn)
 {
 	struct kvm *kvm = info->kvm;
 	struct kvm_memory_slot *slot;
@@ -1732,7 +1732,7 @@ static int kvmgt_page_track_add(struct intel_vgpu *info, u64 gfn)
 	return 0;
 }
 
-static int kvmgt_page_track_remove(struct intel_vgpu *info, u64 gfn)
+int intel_gvt_page_track_remove(struct intel_vgpu *info, u64 gfn)
 {
 	struct kvm *kvm = info->kvm;
 	struct kvm_memory_slot *slot;
@@ -1968,8 +1968,6 @@ static void kvmgt_dma_unmap_guest_page(struct intel_vgpu *vgpu,
 static const struct intel_gvt_mpt kvmgt_mpt = {
 	.host_init = kvmgt_host_init,
 	.host_exit = kvmgt_host_exit,
-	.enable_page_track = kvmgt_page_track_add,
-	.disable_page_track = kvmgt_page_track_remove,
 	.dma_map_guest_page = kvmgt_dma_map_guest_page,
 	.dma_unmap_guest_page = kvmgt_dma_unmap_guest_page,
 	.dma_pin_guest_page = kvmgt_dma_pin_guest_page,

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

@@ -71,34 +71,6 @@ static inline void intel_gvt_hypervisor_host_exit(struct device *dev, void *gvt)
 	intel_gvt_host.mpt->host_exit(dev, gvt);
 }
 
-/**
- * intel_gvt_hypervisor_enable_page_track - track a guest page
- * @vgpu: a vGPU
- * @gfn: the gfn of guest
- *
- * Returns:
- * Zero on success, negative error code if failed.
- */
-static inline int intel_gvt_hypervisor_enable_page_track(
-		struct intel_vgpu *vgpu, unsigned long gfn)
-{
-	return intel_gvt_host.mpt->enable_page_track(vgpu, gfn);
-}
-
-/**
- * intel_gvt_hypervisor_disable_page_track - untrack a guest page
- * @vgpu: a vGPU
- * @gfn: the gfn of guest
- *
- * Returns:
- * Zero on success, negative error code if failed.
- */
-static inline int intel_gvt_hypervisor_disable_page_track(
-		struct intel_vgpu *vgpu, unsigned long gfn)
-{
-	return intel_gvt_host.mpt->disable_page_track(vgpu, gfn);
-}
-
 /**
  * intel_gvt_hypervisor_dma_map_guest_page - setup dma map for guest page
  * @vgpu: a vGPU

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

@@ -87,7 +87,7 @@ void intel_vgpu_unregister_page_track(struct intel_vgpu *vgpu,
 	track = radix_tree_delete(&vgpu->page_track_tree, gfn);
 	if (track) {
 		if (track->tracked)
-			intel_gvt_hypervisor_disable_page_track(vgpu, gfn);
+			intel_gvt_page_track_remove(vgpu, gfn);
 		kfree(track);
 	}
 }
@@ -112,7 +112,7 @@ int intel_vgpu_enable_page_track(struct intel_vgpu *vgpu, unsigned long gfn)
 	if (track->tracked)
 		return 0;
 
-	ret = intel_gvt_hypervisor_enable_page_track(vgpu, gfn);
+	ret = intel_gvt_page_track_add(vgpu, gfn);
 	if (ret)
 		return ret;
 	track->tracked = true;
@@ -139,7 +139,7 @@ int intel_vgpu_disable_page_track(struct intel_vgpu *vgpu, unsigned long gfn)
 	if (!track->tracked)
 		return 0;
 
-	ret = intel_gvt_hypervisor_disable_page_track(vgpu, gfn);
+	ret = intel_gvt_page_track_remove(vgpu, gfn);
 	if (ret)
 		return ret;
 	track->tracked = false;
@@ -172,7 +172,7 @@ int intel_vgpu_page_track_handler(struct intel_vgpu *vgpu, u64 gpa,
 
 	if (unlikely(vgpu->failsafe)) {
 		/* Remove write protection to prevent furture traps. */
-		intel_vgpu_disable_page_track(vgpu, gpa >> PAGE_SHIFT);
+		intel_gvt_page_track_remove(vgpu, gpa >> PAGE_SHIFT);
 	} else {
 		ret = page_track->handler(page_track, gpa, data, bytes);
 		if (ret)