[Xen-devel] [PATCH 12/12] xen/gntdev: provide a set of pages for each VMA

[David Vrabel <david.vrabel@xxxxxxxxxx>]

From: Jenny Herbert <jennifer.herbert@xxxxxxxxxx>

For each VMA for grant maps, provide the correct array of pages so
get_user_pages() on foreign mappings works in PV guests.

Signed-off-by: Jenny Herbert <jennifer.herbert@xxxxxxxxxx>
Signed-off-by: David Vrabel <david.vrabel@xxxxxxxxxx>
---
 drivers/xen/gntdev.c |    2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/xen/gntdev.c b/drivers/xen/gntdev.c
index 5d73fe8..09e7863 100644
--- a/drivers/xen/gntdev.c
+++ b/drivers/xen/gntdev.c
@@ -870,6 +870,8 @@ static int gntdev_mmap(struct file *flip, struct 
vm_area_struct *vma)
                                            vma->vm_end - vma->vm_start,
                                            set_grant_ptes_as_special, NULL);
                }
+
+               vma->pages = map->pages;
        }
 
        return 0;
-- 
1.7.10.4


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