On 11/20/2018 10:39 PM, Leif Lindholm wrote:
> On Tue, Nov 20, 2018 at 10:29:57PM +0800, Ming Huang wrote:
>>>>> And all Hisilicon platforms still use
>>>>> AuthVariableLib|MdeModulePkg/Library/AuthVariableLibNull/AuthVariableLibNull.inf
>>>>> regardless of Secure Boot setting.
>>>>>
>>>>> So what problem does this patch solve? A runtime one?
>>>>
>>>> This patch solve bug in FlashFvbDxe.
>>>
>>> Yes, but what bug? What is the symptom? What _specific_ problem goes
>>> away by adding this patch? That information should have been in the
>>> original commit message. I have no information available to me as I
>>> now build -rc1 to suggest that this patch should be included.
>>
>> The bug is that gEfiAuthenticatedVariableGuid should be used in FlashFvbDxe,
>> not gEfiVariableGuid when enable secure boot.
>
> OK, I will ask a third time: what _problem_ does this solve?
> What is the symptom?
> When someone uses the buggy firmware, what does not work for them?
> This information _always_ needs to be in the commit message.
>
>>>> Should I add a patch before this patch
>>>> to solve build error with -D SECURE_BOOT_ENABLE=TRUE in v4?
>>>
>>> That would require a sane implementation of PlatformSecureLib,
>>> implementing a real UserPhysicalPresent().
>>> Can you turn that around within the next few hours?
>>
>> My original idea is using
>> OvmfPkg/Library/PlatformSecureLib/PlatformSecureLib.
>> There is not enough time to implement a real UserPhysicalPresent.
>
> If there is not enough time to implement a real PlatformSecureLib,
> there is no need to have Secure Boot at all. Same thing goes for
> secure variable store (to hardware devices that are not accessible
> from Non-secure world).
>
>> This patch will add when we implement real secure boot in future.
>
> That sounds like the best thing to do.
>
> Meanwhile, could you create a patch to get rid of the SECURE_BOOT
> options completely from the .dsc/.fdf please? I don't like having it
> in there when we know it doesn't build.
OK, I will send the patch in next series.
Thanks.
>
> /
> Leif
>
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