Re: [Xen-devel] [PATCHv6] 02/28] build: build Kconfig and config rules

[Doug Goldstein <cardoe@xxxxxxxxxx>]

On 12/8/15 1:32 AM, Jan Beulich wrote:
>>>> On 07.12.15 at 22:27, <cardoe@xxxxxxxxxx> wrote:
>> On 12/3/15 2:57 AM, Jan Beulich wrote:
>>>>>> On 03.12.15 at 01:34, <cardoe@xxxxxxxxxx> wrote:
>>>> On 12/1/15 5:22 AM, Jan Beulich wrote:
>>>>>>>> On 30.11.15 at 18:53, <cardoe@xxxxxxxxxx> wrote:
>>>>>> On 11/30/15 8:36 AM, Jan Beulich wrote:
>>>>>>>>>> On 24.11.15 at 18:51, <cardoe@xxxxxxxxxx> wrote:
>>>>>>>> +config ARCH_DEFCONFIG
>>>>>>>> +      string
>>>>>>>> +      default "arch/x86/configs/x86_64_defconfig"
>>>>>>>
>>>>>>> x86_defconfig perhaps?
>>>>>>
>>>>>> No. I was told to drop support for x86 entirely in an earlier review.
>>>>>> Its not possible to configure for 32-bit x86 in v6.
>>>>>
>>>>> x86 != 32-bit. I think you're mixing this up with ix86 or x86-32.
>>>>> Here I consider x86 as to basic architecture without any
>>>>> particular bit width in mind.
>>>>
>>>> ok. Well the syntax is still "arch/SUBARCH/configs/ARCH_defconfig" so
>>>> the original is correct. There is no defconfig for the ambiguous x86
>>>> family. You're either building for x86_64 or x86_32 (which I referred to
>>>> as x86 in my original response).
>>>>
>>>> This defconfig is for the 64-bit architecture of x86 (x86_64) and there
>>>> for its named correctly.
>>>
>>> But there is no x86_32 architecture form the hypervisor build's
>>> point of view, and hence x86 isn't ambiguous. In fact the mid-term
>>> plan is to remove leftovers of references to x86_64 (like the
>>> arch/x86/x86_64/ or include/asm-x86/x86_64/ directories) where
>>> possible. The only place they need to be kept are in the public
>>> interface.
>>
>> That's fine but you don't build things for "x86". You build them for
>> "x86_64". XEN_TARGET_ARCH takes in "x86_64".
> 
> The XEN_TARGET_ARCH value is of no interest here. The only fact
> that I care about is that there's only one x86 configuration, and
> hence I can't see why it shouldn't be named x86_defconfig.
> 
> Jan
> 

This is just how the upstream stuff works. Are we forking upstream's
kconfig just so we can call it "x86" instead of "x86_64"?

-- 
Doug Goldstein

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