KVM: x86/mmu: Rename make_huge_page_split_spte() to make_small_spte()

Rename make_huge_page_split_spte() to make_small_spte(). This ensures
that the usage of "small_spte" and "huge_spte" are consistent between
make_huge_spte() and make_small_spte().

This should also reduce some confusion as make_huge_page_split_spte()
almost reads like it will create a huge SPTE, when in fact it is
creating a small SPTE to split the huge SPTE.

No functional change intended.

Suggested-by: Sean Christopherson <seanjc@google.com>
Signed-off-by: David Matlack <dmatlack@google.com>
Link: https://lore.kernel.org/r/20240823235648.3236880-6-dmatlack@google.com
Signed-off-by: Sean Christopherson <seanjc@google.com>

Author: dmatlack

arch/x86/kvm/mmu/mmu.c

@@ -6735,7 +6735,7 @@ static void shadow_mmu_split_huge_page(struct kvm *kvm,
 			continue;
 		}
 
-		spte = make_huge_page_split_spte(kvm, huge_spte, sp->role, index);
+		spte = make_small_spte(kvm, huge_spte, sp->role, index);
 		mmu_spte_set(sptep, spte);
 		__rmap_add(kvm, cache, slot, sptep, gfn, sp->role.access);
 	}

arch/x86/kvm/mmu/spte.c

@@ -295,8 +295,8 @@ static u64 make_spte_nonexecutable(u64 spte)
  * This is used during huge page splitting to build the SPTEs that make up the
  * new page table.
  */
-u64 make_huge_page_split_spte(struct kvm *kvm, u64 huge_spte,
-			      union kvm_mmu_page_role role, int index)
+u64 make_small_spte(struct kvm *kvm, u64 huge_spte,
+		    union kvm_mmu_page_role role, int index)
 {
 	u64 child_spte = huge_spte;
 

arch/x86/kvm/mmu/spte.h

@@ -504,8 +504,8 @@ bool make_spte(struct kvm_vcpu *vcpu, struct kvm_mmu_page *sp,
 	       unsigned int pte_access, gfn_t gfn, kvm_pfn_t pfn,
 	       u64 old_spte, bool prefetch, bool synchronizing,
 	       bool host_writable, u64 *new_spte);
-u64 make_huge_page_split_spte(struct kvm *kvm, u64 huge_spte,
-		      	      union kvm_mmu_page_role role, int index);
+u64 make_small_spte(struct kvm *kvm, u64 huge_spte,
+		    union kvm_mmu_page_role role, int index);
 u64 make_huge_spte(struct kvm *kvm, u64 small_spte, int level);
 u64 make_nonleaf_spte(u64 *child_pt, bool ad_disabled);
 u64 make_mmio_spte(struct kvm_vcpu *vcpu, u64 gfn, unsigned int access);

arch/x86/kvm/mmu/tdp_mmu.c

@@ -1314,7 +1314,7 @@ static int tdp_mmu_split_huge_page(struct kvm *kvm, struct tdp_iter *iter,
 	 * not been linked in yet and thus is not reachable from any other CPU.
 	 */
 	for (i = 0; i < SPTE_ENT_PER_PAGE; i++)
-		sp->spt[i] = make_huge_page_split_spte(kvm, huge_spte, sp->role, i);
+		sp->spt[i] = make_small_spte(kvm, huge_spte, sp->role, i);
 
 	/*
 	 * Replace the huge spte with a pointer to the populated lower level