drm/i915/gvt: Rename mpt api {set, unset}_wp_page to {enable, disable}_page_track

The kvmgt's implementation of mpt api {set,unset}_wp_page is not real
write-protection - the data get written before invoke this two api.
As discussed, change the mpt api to match the real behavior.
Signed-off-by: Changbin Du <changbin.du@intel.com>
Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>

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

@@ -44,8 +44,8 @@ struct intel_gvt_mpt {
 	void (*detach_vgpu)(unsigned long handle);
 	int (*inject_msi)(unsigned long handle, u32 addr, u16 data);
 	unsigned long (*from_virt_to_mfn)(void *p);
-	int (*set_wp_page)(unsigned long handle, u64 gfn);
-	int (*unset_wp_page)(unsigned long handle, u64 gfn);
+	int (*enable_page_track)(unsigned long handle, u64 gfn);
+	int (*disable_page_track)(unsigned long handle, u64 gfn);
 	int (*read_gpa)(unsigned long handle, unsigned long gpa, void *buf,
 			unsigned long len);
 	int (*write_gpa)(unsigned long handle, unsigned long gpa, void *buf,

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

@@ -1321,7 +1321,7 @@ static void kvmgt_host_exit(struct device *dev, void *gvt)
 	mdev_unregister_device(dev);
 }
 
-static int kvmgt_write_protect_add(unsigned long handle, u64 gfn)
+static int kvmgt_page_track_add(unsigned long handle, u64 gfn)
 {
 	struct kvmgt_guest_info *info;
 	struct kvm *kvm;
@@ -1355,7 +1355,7 @@ static int kvmgt_write_protect_add(unsigned long handle, u64 gfn)
 	return 0;
 }
 
-static int kvmgt_write_protect_remove(unsigned long handle, u64 gfn)
+static int kvmgt_page_track_remove(unsigned long handle, u64 gfn)
 {
 	struct kvmgt_guest_info *info;
 	struct kvm *kvm;
@@ -1629,8 +1629,8 @@ struct intel_gvt_mpt kvmgt_mpt = {
 	.detach_vgpu = kvmgt_detach_vgpu,
 	.inject_msi = kvmgt_inject_msi,
 	.from_virt_to_mfn = kvmgt_virt_to_pfn,
-	.set_wp_page = kvmgt_write_protect_add,
-	.unset_wp_page = kvmgt_write_protect_remove,
+	.enable_page_track = kvmgt_page_track_add,
+	.disable_page_track = kvmgt_page_track_remove,
 	.read_gpa = kvmgt_read_gpa,
 	.write_gpa = kvmgt_write_gpa,
 	.gfn_to_mfn = kvmgt_gfn_to_pfn,

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

@@ -154,7 +154,7 @@ static inline unsigned long intel_gvt_hypervisor_virt_to_mfn(void *p)
 }
 
 /**
- * intel_gvt_hypervisor_enable - set a guest page to write-protected
+ * intel_gvt_hypervisor_enable_page_track - track a guest page
  * @vgpu: a vGPU
  * @t: page track data structure
  *
@@ -170,7 +170,7 @@ static inline int intel_gvt_hypervisor_enable_page_track(
 	if (t->tracked)
 		return 0;
 
-	ret = intel_gvt_host.mpt->set_wp_page(vgpu->handle, t->gfn);
+	ret = intel_gvt_host.mpt->enable_page_track(vgpu->handle, t->gfn);
 	if (ret)
 		return ret;
 	t->tracked = true;
@@ -179,8 +179,7 @@ static inline int intel_gvt_hypervisor_enable_page_track(
 }
 
 /**
- * intel_gvt_hypervisor_disable_page_track - remove the write-protection of a
- * guest page
+ * intel_gvt_hypervisor_disable_page_track - untrack a guest page
  * @vgpu: a vGPU
  * @t: page track data structure
  *
@@ -196,7 +195,7 @@ static inline int intel_gvt_hypervisor_disable_page_track(
 	if (!t->tracked)
 		return 0;
 
-	ret = intel_gvt_host.mpt->unset_wp_page(vgpu->handle, t->gfn);
+	ret = intel_gvt_host.mpt->disable_page_track(vgpu->handle, t->gfn);
 	if (ret)
 		return ret;
 	t->tracked = false;