[Beignet] [PATCH] Update README for the command parser in drm kernel.

[Zhigang Gong]

Pushed, with minor change. Thanks.

On Fri, Sep 05, 2014 at 11:25:05AM +0800, Yang Rong wrote:
> Signed-off-by: Yang Rong <rong.r.yang at intel.com>
> ---
>  docs/Beignet.mdwn | 10 ++++++++++
>  1 file changed, 10 insertions(+)
> 
> diff --git a/docs/Beignet.mdwn b/docs/Beignet.mdwn
> index 1cbffa4..1c6c575 100644
> --- a/docs/Beignet.mdwn
> +++ b/docs/Beignet.mdwn
> @@ -72,6 +72,16 @@ really recent C++11 features, you may expect problems with older compilers. Last
>  time I tried, the code breaks ICC 12 and Clang with internal compiler errors
>  while compiling anonymous nested lambda functions.
>  
> +**Note about Linux Kernel**
> +* If your beignet don't run correctly, pls check your linux kernel first. Beignet is blocked
> +  between some commits of kernel, nearby 3.15 and 3.16. If your kernel include the commit
> +  f0a346bdafaf6fc4a51df9ddf1548fd888f860d8, witch enable register whitelist when parse command
> +  but not include some register used by beignet, you should also include the commit
> +  c9224faa59c3071ecfa2d4b24592f4eb61e57069, or you can disable the parse command by invoke the
> +  following command on Ubuntu system:
> +
> +  `# echo 0 > /sys/module/i915/parameters/enable_cmd_parser`
> +
>  
>  How to build and install
>  ------------------------
> -- 
> 1.8.3.2
> 
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