[Xen-devel] [PATCH] vt-d: fix wrong addr in IOTLB invalidation descriptor

["Zhang, Yang Z" <yang.z.zhang@xxxxxxxxx>]

According to vt-d specs, the addr in IOTLB invalidation descriptor should be 4K 
page aligned.

Signed-off-by: Yang Zhang <yang.z.zhang@xxxxxxxxx>

diff -r 0455d8317631 xen/drivers/passthrough/vtd/qinval.c
--- a/xen/drivers/passthrough/vtd/qinval.c      Thu Jun 28 18:43:28 2012 +0100
+++ b/xen/drivers/passthrough/vtd/qinval.c      Wed Jul 11 08:43:24 2012 +0800
@@ -140,7 +140,7 @@ static int gen_iotlb_inv_dsc(struct iomm
     qinval_entry->q.iotlb_inv_dsc.hi.am = am;
     qinval_entry->q.iotlb_inv_dsc.hi.ih = ih;
     qinval_entry->q.iotlb_inv_dsc.hi.res_1 = 0;
-    qinval_entry->q.iotlb_inv_dsc.hi.addr = addr;
+    qinval_entry->q.iotlb_inv_dsc.hi.addr = addr >> PAGE_SHIFT_4K;

     unmap_vtd_domain_page(qinval_entries);
     spin_unlock_irqrestore(&qi_ctrl->qinval_lock, flags);


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