Re: [Xen-devel] [PATCH v2] xen/SandyBridge: reserve pages when integrated graphics

["Jan Beulich" <JBeulich@xxxxxxxx>]

>>> On 26.03.13 at 10:38, Xudong Hao <xudong.hao@xxxxxxxxx> wrote:
> SNB graphics devices have a bug that prevent them from accessing certain
> memory ranges, namely anything below 1M and in the pages listed in the
> table.
> 
> Xen does not initialize below 1MB to heap, i.e. below 1MB pages don't be
> allocated, so it's unnecessary to reserve memory below the 1 MB mark
> that has not already been reserved.
> 
> So reserve those pages listed in the table at xen boot if set detect a
> SNB gfx device on the CPU to avoid GPU hangs.
> 
> Changes in v2:
> - using MFNs directly rather than passing a string to parse, suggestion by 
> Jan 
>   Beulich
> 
> Signed-off-by: Xudong Hao <xudong.hao@xxxxxxxxx>

Looks good to me, but needs an ack from Keir.

Jan


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