KVM: x86/mmu: Rename 'mask' to 'spte' in MMIO SPTE helpers

The value returned by make_mmio_spte() is a SPTE, it is not a mask.
Name it accordingly.

No functional change intended.
Signed-off-by: NSean Christopherson <seanjc@google.com>
Message-Id: <20210225204749.1512652-10-seanjc@google.com>
Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>

arch/x86/kvm/mmu/mmu.c

@@ -215,10 +215,10 @@ bool is_nx_huge_page_enabled(void)
 static void mark_mmio_spte(struct kvm_vcpu *vcpu, u64 *sptep, u64 gfn,
 			   unsigned int access)
 {
-	u64 mask = make_mmio_spte(vcpu, gfn, access);
+	u64 spte = make_mmio_spte(vcpu, gfn, access);
 
-	trace_mark_mmio_spte(sptep, gfn, mask);
-	mmu_spte_set(sptep, mask);
+	trace_mark_mmio_spte(sptep, gfn, spte);
+	mmu_spte_set(sptep, spte);
 }
 
 static gfn_t get_mmio_spte_gfn(u64 spte)

arch/x86/kvm/mmu/spte.c

@@ -48,18 +48,18 @@ static u64 generation_mmio_spte_mask(u64 gen)
 u64 make_mmio_spte(struct kvm_vcpu *vcpu, u64 gfn, unsigned int access)
 {
 	u64 gen = kvm_vcpu_memslots(vcpu)->generation & MMIO_SPTE_GEN_MASK;
-	u64 mask = generation_mmio_spte_mask(gen);
+	u64 spte = generation_mmio_spte_mask(gen);
 	u64 gpa = gfn << PAGE_SHIFT;
 
 	WARN_ON_ONCE(!shadow_mmio_value);
 
 	access &= shadow_mmio_access_mask;
-	mask |= shadow_mmio_value | access;
-	mask |= gpa | shadow_nonpresent_or_rsvd_mask;
-	mask |= (gpa & shadow_nonpresent_or_rsvd_mask)
+	spte |= shadow_mmio_value | access;
+	spte |= gpa | shadow_nonpresent_or_rsvd_mask;
+	spte |= (gpa & shadow_nonpresent_or_rsvd_mask)
 		<< SHADOW_NONPRESENT_OR_RSVD_MASK_LEN;
 
-	return mask;
+	return spte;
 }
 
 static bool kvm_is_mmio_pfn(kvm_pfn_t pfn)