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s390/kvm: page table invalidation notifier

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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>
This commit is contained in:
Martin Schwidefsky
2016-03-08 11:52:54 +01:00
committed by Christian Borntraeger
parent 64672c95ea
commit 414d3b0749
3 changed files with 31 additions and 9 deletions
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19
arch/s390/mm/gmap.c
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@@ -572,6 +572,21 @@ 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
@@ -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);
}