[IA64] Fix vti guests broken issue.

mfn_valid should use machine physical pfn, not guest physical pfn.
This patch fixes the regression introduced by 18761:f6795589ef82.

Sign-off-by: Xiantao Zhang <xiantao.zhang@intel.com>

diff --git a/xen/arch/ia64/vmx/vtlb.c b/xen/arch/ia64/vmx/vtlb.c
index cab4b86e0f58aaaf19ce077a58acd69e9311b4ba..f36580e323d199322c568a35ed66c41b7c596e64 100644 (file)
--- a/xen/arch/ia64/vmx/vtlb.c
+++ b/xen/arch/ia64/vmx/vtlb.c
@@ -522,7 +522,7 @@ static u64 translate_phy_pte(VCPU *v, u64 pte, u64 itir, u64 va)
      * which is required by vga acceleration since qemu maps shared
      * vram buffer with WB.
      */
-    if (mfn_valid(pte_pfn(__pte(pte))) && phy_pte.ma != VA_MATTR_NATPAGE)
+    if (mfn_valid(pte_pfn(__pte(maddr))) && phy_pte.ma != VA_MATTR_NATPAGE)
         phy_pte.ma = VA_MATTR_WB;
 
     maddr = ((maddr & _PAGE_PPN_MASK) & PAGE_MASK) | (paddr & ~PAGE_MASK);