[PATCH v2 07/20] KVM: s390: vsie: Move release/acquire gmap shadow

[Christoph Schlameuss <schlameuss@linux.ibm.com>]

Move {release,acquire}_gmap_shadow() up in preparation for the next patch.
No change intended.

Signed-off-by: Christoph Schlameuss <schlameuss@linux.ibm.com>
---
 arch/s390/kvm/vsie.c | 130 +++++++++++++++++++++++++--------------------------
 1 file changed, 65 insertions(+), 65 deletions(-)

diff --git a/arch/s390/kvm/vsie.c b/arch/s390/kvm/vsie.c
index 0e32d1543ae2..86e1c605f4ce 100644
--- a/arch/s390/kvm/vsie.c
+++ b/arch/s390/kvm/vsie.c
@@ -149,6 +149,71 @@ static int prefix_is_mapped(struct vsie_page *vsie_page)
 	return !(atomic_read(&vsie_page->scb_s.prog20) & PROG_REQUEST);
 }
 
+static void release_gmap_shadow(struct vsie_page *vsie_page)
+{
+	struct gmap *gmap = vsie_page->gmap_cache.gmap;
+
+	lockdep_assert_held(&gmap->kvm->arch.gmap->children_lock);
+
+	list_del(&vsie_page->gmap_cache.list);
+	vsie_page->gmap_cache.gmap = NULL;
+	prefix_unmapped(vsie_page);
+
+	if (list_empty(&gmap->scb_users)) {
+		gmap_remove_child(gmap);
+		gmap_put(gmap);
+	}
+}
+
+static struct gmap *acquire_gmap_shadow(struct kvm_vcpu *vcpu, struct vsie_page *vsie_page)
+{
+	union ctlreg0 cr0;
+	struct gmap *gmap;
+	union asce asce;
+	int edat;
+
+	asce.val = vcpu->arch.sie_block->gcr[1];
+	cr0.val = vcpu->arch.sie_block->gcr[0];
+	edat = cr0.edat && test_kvm_facility(vcpu->kvm, 8);
+	edat += edat && test_kvm_facility(vcpu->kvm, 78);
+
+	scoped_guard(spinlock, &vcpu->kvm->arch.gmap->children_lock) {
+		gmap = vsie_page->gmap_cache.gmap;
+		if (gmap) {
+			/*
+			 * ASCE or EDAT could have changed since last icpt, or the gmap
+			 * we're holding has been unshadowed. If the gmap is still valid,
+			 * we can safely reuse it.
+			 */
+			if (gmap_is_shadow_valid(gmap, asce, edat)) {
+				vcpu->kvm->stat.gmap_shadow_reuse++;
+				gmap_get(gmap);
+				return gmap;
+			}
+			/* release the old shadow and mark the prefix as unmapped */
+			release_gmap_shadow(vsie_page);
+		}
+	}
+again:
+	gmap = gmap_create_shadow(vcpu->arch.mc, vcpu->kvm->arch.gmap, asce, edat);
+	if (IS_ERR(gmap))
+		return gmap;
+	scoped_guard(spinlock, &vcpu->kvm->arch.gmap->children_lock) {
+		/* unlikely race condition, remove the previous shadow */
+		if (vsie_page->gmap_cache.gmap)
+			release_gmap_shadow(vsie_page);
+		if (!gmap->parent) {
+			gmap_put(gmap);
+			goto again;
+		}
+		vcpu->kvm->stat.gmap_shadow_create++;
+		list_add(&vsie_page->gmap_cache.list, &gmap->scb_users);
+		vsie_page->gmap_cache.gmap = gmap;
+		prefix_unmapped(vsie_page);
+	}
+	return gmap;
+}
+
 /*
  * Pin the guest page given by gpa and set hpa to the pinned host address.
  * Will always be pinned writable.
@@ -1310,71 +1375,6 @@ static int do_vsie_run(struct kvm_vcpu *vcpu, struct vsie_page *vsie_page, struc
 	return rc;
 }
 
-static void release_gmap_shadow(struct vsie_page *vsie_page)
-{
-	struct gmap *gmap = vsie_page->gmap_cache.gmap;
-
-	lockdep_assert_held(&gmap->kvm->arch.gmap->children_lock);
-
-	list_del(&vsie_page->gmap_cache.list);
-	vsie_page->gmap_cache.gmap = NULL;
-	prefix_unmapped(vsie_page);
-
-	if (list_empty(&gmap->scb_users)) {
-		gmap_remove_child(gmap);
-		gmap_put(gmap);
-	}
-}
-
-static struct gmap *acquire_gmap_shadow(struct kvm_vcpu *vcpu, struct vsie_page *vsie_page)
-{
-	union ctlreg0 cr0;
-	struct gmap *gmap;
-	union asce asce;
-	int edat;
-
-	asce.val = vcpu->arch.sie_block->gcr[1];
-	cr0.val = vcpu->arch.sie_block->gcr[0];
-	edat = cr0.edat && test_kvm_facility(vcpu->kvm, 8);
-	edat += edat && test_kvm_facility(vcpu->kvm, 78);
-
-	scoped_guard(spinlock, &vcpu->kvm->arch.gmap->children_lock) {
-		gmap = vsie_page->gmap_cache.gmap;
-		if (gmap) {
-			/*
-			 * ASCE or EDAT could have changed since last icpt, or the gmap
-			 * we're holding has been unshadowed. If the gmap is still valid,
-			 * we can safely reuse it.
-			 */
-			if (gmap_is_shadow_valid(gmap, asce, edat)) {
-				vcpu->kvm->stat.gmap_shadow_reuse++;
-				gmap_get(gmap);
-				return gmap;
-			}
-			/* release the old shadow and mark the prefix as unmapped */
-			release_gmap_shadow(vsie_page);
-		}
-	}
-again:
-	gmap = gmap_create_shadow(vcpu->arch.mc, vcpu->kvm->arch.gmap, asce, edat);
-	if (IS_ERR(gmap))
-		return gmap;
-	scoped_guard(spinlock, &vcpu->kvm->arch.gmap->children_lock) {
-		/* unlikely race condition, remove the previous shadow */
-		if (vsie_page->gmap_cache.gmap)
-			release_gmap_shadow(vsie_page);
-		if (!gmap->parent) {
-			gmap_put(gmap);
-			goto again;
-		}
-		vcpu->kvm->stat.gmap_shadow_create++;
-		list_add(&vsie_page->gmap_cache.list, &gmap->scb_users);
-		vsie_page->gmap_cache.gmap = gmap;
-		prefix_unmapped(vsie_page);
-	}
-	return gmap;
-}
-
 /*
  * Register the shadow scb at the VCPU, e.g. for kicking out of vsie.
  */

-- 
2.55.0