s390/kvm: page table invalidation notifier

Pass an address range to the page table invalidation notifier
for KVM. This allows to notify changes that affect a larger
virtual memory area, e.g. for 1MB pages.

Reviewed-by: David Hildenbrand <dahi@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>

1 files changed, 16 insertions, 3 deletions

diff --git a/arch/s390/mm/gmap.c b/arch/s390/mm/gmap.c
index cace818d86eb..b5820bf47ec6 100644
--- a/arch/s390/mm/gmap.c
+++ b/arch/s390/mm/gmap.c
@@ -573,6 +573,21 @@ void gmap_unregister_ipte_notifier(struct gmap_notifier *nb)
 EXPORT_SYMBOL_GPL(gmap_unregister_ipte_notifier);
 
 /**
+ * gmap_call_notifier - call all registered invalidation callbacks
+ * @gmap: pointer to guest mapping meta data structure
+ * @start: start virtual address in the guest address space
+ * @end: end virtual address in the guest address space
+ */
+static void gmap_call_notifier(struct gmap *gmap, unsigned long start,
+                               unsigned long end)
+{
+        struct gmap_notifier *nb;
+
+        list_for_each_entry(nb, &gmap_notifier_list, list)
+                nb->notifier_call(gmap, start, end);
+}
+
+/**
  * gmap_ipte_notify - mark a range of ptes for invalidation notification
  * @gmap: pointer to guest mapping meta data structure
  * @gaddr: virtual address in the guest address space
@@ -643,7 +658,6 @@ void ptep_notify(struct mm_struct *mm, unsigned long vmaddr, pte_t *pte)
 {
         unsigned long offset, gaddr;
         unsigned long *table;
-        struct gmap_notifier *nb;
         struct gmap *gmap;
 
         offset = ((unsigned long) pte) & (255 * sizeof(pte_t));
@@ -655,8 +669,7 @@ void ptep_notify(struct mm_struct *mm, unsigned long vmaddr, pte_t *pte)
                 if (!table)
                         continue;
                 gaddr = __gmap_segment_gaddr(table) + offset;
-                list_for_each_entry(nb, &gmap_notifier_list, list)
-                        nb->notifier_call(gmap, gaddr);
+                gmap_call_notifier(gmap, gaddr, gaddr + PAGE_SIZE - 1);
         }
         spin_unlock(&gmap_notifier_lock);
 }