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authorMartin Schwidefsky <schwidefsky@de.ibm.com>2016-03-08 11:52:54 +0100
committerChristian Borntraeger <borntraeger@de.ibm.com>2016-06-20 09:46:48 +0200
commit414d3b07496604a4372466a6b474ca24291a143c (patch)
tree2d3a2610ec945377f27fc2b72744ac8511e1709d /arch/s390/mm/gmap.c
parent64672c95ea4c2f7096e519e826076867e8ef0938 (diff)
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>
Diffstat (limited to 'arch/s390/mm/gmap.c')
-rw-r--r--arch/s390/mm/gmap.c19
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);
}