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

[Isaku Yamahata <yamahata@xxxxxxxxxxxxx>]

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 <xiantao.zhang@xxxxxxxxx>
> 
> 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);

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-- 
yamahata

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