drm/i915/gvt: devirtualize ->is_valid_gfn

Just call the code directly and move towards the callers.
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/20220411141403.86980-19-hch@lst.deReviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Reviewed-by: Zhi Wang <zhi.a.wang@intel.com>

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

@@ -49,6 +49,22 @@
 static bool enable_out_of_sync = false;
 static int preallocated_oos_pages = 8192;
 
+static bool intel_gvt_is_valid_gfn(struct intel_vgpu *vgpu, unsigned long gfn)
+{
+	struct kvm *kvm = vgpu->kvm;
+	int idx;
+	bool ret;
+
+	if (!vgpu->attached)
+		return false;
+
+	idx = srcu_read_lock(&kvm->srcu);
+	ret = kvm_is_visible_gfn(kvm, gfn);
+	srcu_read_unlock(&kvm->srcu, idx);
+
+	return ret;
+}
+
 /*
  * validate a gm address and related range size,
  * translate it to host gm address
@@ -1331,7 +1347,7 @@ static int ppgtt_populate_spt(struct intel_vgpu_ppgtt_spt *spt)
 			ppgtt_set_shadow_entry(spt, &se, i);
 		} else {
 			gfn = ops->get_pfn(&ge);
-			if (!intel_gvt_hypervisor_is_valid_gfn(vgpu, gfn)) {
+			if (!intel_gvt_is_valid_gfn(vgpu, gfn)) {
 				ops->set_pfn(&se, gvt->gtt.scratch_mfn);
 				ppgtt_set_shadow_entry(spt, &se, i);
 				continue;
@@ -2315,7 +2331,7 @@ static int emulate_ggtt_mmio_write(struct intel_vgpu *vgpu, unsigned int off,
 		/* one PTE update may be issued in multiple writes and the
 		 * first write may not construct a valid gfn
 		 */
-		if (!intel_gvt_hypervisor_is_valid_gfn(vgpu, gfn)) {
+		if (!intel_gvt_is_valid_gfn(vgpu, gfn)) {
 			ops->set_pfn(&m, gvt->gtt.scratch_mfn);
 			goto out;
 		}

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

@@ -55,7 +55,6 @@ struct intel_gvt_mpt {
 				dma_addr_t dma_addr);
 
 	int (*dma_pin_guest_page)(struct intel_vgpu *vgpu, dma_addr_t dma_addr);
-	bool (*is_valid_gfn)(struct intel_vgpu *vgpu, unsigned long gfn);
 };
 
 #endif /* _GVT_HYPERCALL_H_ */

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

@@ -1980,22 +1980,6 @@ static void kvmgt_dma_unmap_guest_page(struct intel_vgpu *vgpu,
 	mutex_unlock(&vgpu->cache_lock);
 }
 
-static bool kvmgt_is_valid_gfn(struct intel_vgpu *vgpu, unsigned long gfn)
-{
-	struct kvm *kvm = vgpu->kvm;
-	int idx;
-	bool ret;
-
-	if (!vgpu->attached)
-		return false;
-
-	idx = srcu_read_lock(&kvm->srcu);
-	ret = kvm_is_visible_gfn(kvm, gfn);
-	srcu_read_unlock(&kvm->srcu, idx);
-
-	return ret;
-}
-
 static const struct intel_gvt_mpt kvmgt_mpt = {
 	.host_init = kvmgt_host_init,
 	.host_exit = kvmgt_host_exit,
@@ -2005,7 +1989,6 @@ static const struct intel_gvt_mpt kvmgt_mpt = {
 	.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,
-	.is_valid_gfn = kvmgt_is_valid_gfn,
 };
 
 struct intel_gvt_host intel_gvt_host = {

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

@@ -157,21 +157,4 @@ intel_gvt_hypervisor_dma_pin_guest_page(struct intel_vgpu *vgpu,
 	return intel_gvt_host.mpt->dma_pin_guest_page(vgpu, dma_addr);
 }
 
-/**
- * intel_gvt_hypervisor_is_valid_gfn - check if a visible gfn
- * @vgpu: a vGPU
- * @gfn: guest PFN
- *
- * Returns:
- * true on valid gfn, false on not.
- */
-static inline bool intel_gvt_hypervisor_is_valid_gfn(
-		struct intel_vgpu *vgpu, unsigned long gfn)
-{
-	if (!intel_gvt_host.mpt->is_valid_gfn)
-		return true;
-
-	return intel_gvt_host.mpt->is_valid_gfn(vgpu, gfn);
-}
-
 #endif /* _GVT_MPT_H_ */