Re: [PATCH v2 3/4] Platform/Hisilicon: move out dxe runtime lib from common file

[Haojian Zhuang <haojian.zhuang@linaro.org>]

>From: Ard Biesheuvel <ard.biesheuvel@linaro.org>
>Sent: Monday, February 12, 2018 12:05 PM
>To: Haojian Zhuang
>Cc: Leif Lindholm; edk2-devel@lists.01.org; heyi.guo@linaro.org; ard.sheuvel@linaro.org; linaro-uefi@lists.linaro.org
>Subject: Re: [edk2] [PATCH v2 3/4] Platform/Hisilicon: move out dxe runtime lib from common file
>
>On 12 February 2018 at 11:47, Haojian Zhuang <haojian.zhuang@linaro.org> wrote:
>>>From: Leif Lindholm <leif.lindholm@linaro.org>
>>>Sent: Monday, February 12, 2018 11:45 AM
>>>To: Haojian Zhuang
>>>Cc: edk2-devel@lists.01.org; linaro-uefi@lists.linaro.org; ard.sheuvel@linaro.org; heyi.guo@linaro.org
>>>Subject: Re: [PATCH v2 3/4] Platform/Hisilicon: move out dxe runtime lib from common file
>>>
>>>On Sat, Feb 10, 2018 at 01:31:06AM +0800, Haojian Zhuang wrote:
>>>> With the SerialPortLib and DebugLib, Dxe runtime driver can't
>>>> be executed well on HiKey. Serial logs are missing.
>>>
>>>"Can't be executed well"? Does this mean it crashes?
>>
>> No crash. Serial output are missing since SerialPortLib is different.
>>
>
>Does this driver take care to only create serial output at boot time?
>Does it, e.g., call EfiAtRuntime() or use a notification callback at
>ExitBootServices to make absolutely sure the serial port is no longer
>used?

These drivers don't use serial port directly. But I tried to use DEBUG () 
function to dump some debug informations in these drivers. I found 
that I can't output anything on serial console.

Best Regards
Haojian