On 12 February 2018 at 12:19, Haojian Zhuang <haojian.zhu...@linaro.org> wrote:
>>From: Ard Biesheuvel <ard.biesheu...@linaro.org>
>>Sent: Monday, February 12, 2018 12:05 PM
>>To: Haojian Zhuang
>>Cc: Leif Lindholm; edk2-devel@lists.01.org; heyi....@linaro.org; 
>>ard.sheu...@linaro.org; linaro-u...@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.zhu...@linaro.org> 
>>>>From: Leif Lindholm <leif.lindh...@linaro.org>
>>>>Sent: Monday, February 12, 2018 11:45 AM
>>>>To: Haojian Zhuang
>>>>Cc: edk2-devel@lists.01.org; linaro-u...@lists.linaro.org; 
>>>>ard.sheu...@linaro.org; heyi....@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
> 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.

But do those DEBUG() calls only occur at boot time? Or could they be
called at runtime as well?
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