---

yaml
---
r: 103719
b: refs/heads/master
c: eab9f71
h: refs/heads/master
i:
  103717: 7540d19
  103715: 66a73ed
  103711: ee32b20
v: v3

[refs]

@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 38d5bc6d50a4368be08b39b02efb9cbbe1dd60d0
+refs/heads/master: eab9f71feb1851b5b700ca12ae614b6a0a441021

trunk/arch/x86/kvm/paging_tmpl.h

@@ -460,28 +460,30 @@ static gpa_t FNAME(gva_to_gpa)(struct kvm_vcpu *vcpu, gva_t vaddr)
 static void FNAME(prefetch_page)(struct kvm_vcpu *vcpu,
 				 struct kvm_mmu_page *sp)
 {
-	int i, offset = 0, r = 0;
-	pt_element_t pt;
+	int i, j, offset, r;
+	pt_element_t pt[256 / sizeof(pt_element_t)];
+	gpa_t pte_gpa;
 
 	if (sp->role.metaphysical
 	    || (PTTYPE == 32 && sp->role.level > PT_PAGE_TABLE_LEVEL)) {
 		nonpaging_prefetch_page(vcpu, sp);
 		return;
 	}
 
-	if (PTTYPE == 32)
+	pte_gpa = gfn_to_gpa(sp->gfn);
+	if (PTTYPE == 32) {
 		offset = sp->role.quadrant << PT64_LEVEL_BITS;
+		pte_gpa += offset * sizeof(pt_element_t);
+	}
 
-	for (i = 0; i < PT64_ENT_PER_PAGE; ++i) {
-		gpa_t pte_gpa = gfn_to_gpa(sp->gfn);
-		pte_gpa += (i+offset) * sizeof(pt_element_t);
-
-		r = kvm_read_guest_atomic(vcpu->kvm, pte_gpa, &pt,
-					  sizeof(pt_element_t));
-		if (r || is_present_pte(pt))
-			sp->spt[i] = shadow_trap_nonpresent_pte;
-		else
-			sp->spt[i] = shadow_notrap_nonpresent_pte;
+	for (i = 0; i < PT64_ENT_PER_PAGE; i += ARRAY_SIZE(pt)) {
+		r = kvm_read_guest_atomic(vcpu->kvm, pte_gpa, pt, sizeof pt);
+		pte_gpa += ARRAY_SIZE(pt) * sizeof(pt_element_t);
+		for (j = 0; j < ARRAY_SIZE(pt); ++j)
+			if (r || is_present_pte(pt[j]))
+				sp->spt[i+j] = shadow_trap_nonpresent_pte;
+			else
+				sp->spt[i+j] = shadow_notrap_nonpresent_pte;
 	}
 }