[Xen-ia64-devel] PATCH: Fix an memory attribute issue.

2008-10-29 Thread Zhang, Xiantao 
PATCH: Fix an memory attribute issue. 

We should ensure Qemu and Guest use same attribute for accessing
the VGA ram, otherwise, host may hang.
Signed-off-by: Xiantao Zhang [EMAIL PROTECTED]

diff -r a6b1be5a83de xen/arch/ia64/vmx/vtlb.c
--- a/xen/arch/ia64/vmx/vtlb.c  Wed Oct 29 11:02:23 2008 +0900
+++ b/xen/arch/ia64/vmx/vtlb.c  Wed Oct 29 16:14:34 2008 +0800
@@ -522,7 +522,7 @@
  * which is required by vga acceleration since qemu maps shared
  * vram buffer with WB.
  */
-if (mfn_valid(maddr  PAGE_SHIFT)  phy_pte.ma == VA_MATTR_NATPAGE)
+if (mfn_valid(maddr  PAGE_SHIFT)  phy_pte.ma != VA_MATTR_NATPAGE)
 phy_pte.ma = VA_MATTR_WB;
 
 maddr = ((maddr  _PAGE_PPN_MASK)  PAGE_MASK) | (paddr  ~PAGE_MASK);

mem_attr_fix.patch
Description: mem_attr_fix.patch
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Re: [Xen-ia64-devel] PATCH: Fix an memory attribute issue.

2008-10-29 Thread Isaku Yamahata 
Applied, thanks.

On Wed, Oct 29, 2008 at 05:21:18PM +0800, Zhang, Xiantao wrote:
 PATCH: Fix an memory attribute issue. 
 
 We should ensure Qemu and Guest use same attribute for accessing
 the VGA ram, otherwise, host may hang.
 Signed-off-by: Xiantao Zhang [EMAIL PROTECTED]
 
 diff -r a6b1be5a83de xen/arch/ia64/vmx/vtlb.c
 --- a/xen/arch/ia64/vmx/vtlb.cWed Oct 29 11:02:23 2008 +0900
 +++ b/xen/arch/ia64/vmx/vtlb.cWed Oct 29 16:14:34 2008 +0800
 @@ -522,7 +522,7 @@
   * which is required by vga acceleration since qemu maps shared
   * vram buffer with WB.
   */
 -if (mfn_valid(maddr  PAGE_SHIFT)  phy_pte.ma == VA_MATTR_NATPAGE)
 +if (mfn_valid(maddr  PAGE_SHIFT)  phy_pte.ma != VA_MATTR_NATPAGE)
  phy_pte.ma = VA_MATTR_WB;
  
  maddr = ((maddr  _PAGE_PPN_MASK)  PAGE_MASK) | (paddr  ~PAGE_MASK);

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-- 
yamahata

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