[PATCH 05/17] iommu/vt-d: Mark root-entry present in set_root_entry

[Joerg Roedel <joro-zLv9SwRftAIdnm+yROfE0A@public.gmane.org>]

From: Joerg Roedel <jroedel-l3A5Bk7waGM@public.gmane.org>

When we do no memcpy from the old to the new kernel for the
root entry table, we have to set the present bit ourself.

Tested-by: Baoquan He <bhe-H+wXaHxf7aLQT0dZR+AlfA@public.gmane.org>
Signed-off-by: Joerg Roedel <jroedel-l3A5Bk7waGM@public.gmane.org>
---
 drivers/iommu/intel-iommu.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/drivers/iommu/intel-iommu.c b/drivers/iommu/intel-iommu.c
index d66bec6..cda0901 100644
--- a/drivers/iommu/intel-iommu.c
+++ b/drivers/iommu/intel-iommu.c
@@ -198,8 +198,7 @@ static inline bool root_present(struct root_entry *root)
 
 static inline void set_root_value(struct root_entry *root, unsigned long value)
 {
-	root->lo &= ~VTD_PAGE_MASK;
-	root->lo |= value & VTD_PAGE_MASK;
+	root->lo = (value & VTD_PAGE_MASK) | 1;
 }
 
 static inline struct context_entry *
-- 
1.9.1