On 28/02/17 17:42, Bryan O'Donoghue wrote:
> On 28/02/17 17:18, Andy Shevchenko wrote:
>> On Tue, Feb 28, 2017 at 6:52 PM, Bryan O'Donoghue
>>> A kernel compiled like this
>>>
>>> make menuconfig ARCH=i386
>>
>> I hope you care that it is equivalent to
>>
>> make menuconfig ARCH=i686
>>
>>> make bzImage -j 8
>>>
>>> will run just fine on Quark x1000 I do it regularly. CPUID ought to (and
>>> does) inform the runtime kernel of what to do re: MSRs etc.
>>>
>>> We won't execute xmm/mmx, we won't touch 686 specific MSRs etc, etc.
>>
>> It is i*6*86 code still.
>>
>> So, summarize, you state that
>> 1. CONFIG_SMP=y and
>> 2. CONFIG_M686=y and
>> 3. Kernel works on Quark
>>
>> Is it correct?
>
> Logically yes. It's a very long time since I looked in detail. No harm
> in checking it out though.
>
> I'll compile up the above kernel this evening (GMT) and verify.
>
>
CONFIG_SMP=y - no difference - like I say it's PF# on lock prefix
instructions, not SMP=y that's the problem here
CONFIG_M686=y (doesnt' boot)
CONFIG_M586TSC=y does boot
So yes M686 is not bootable on this part. My point to you about having a
custom kernel though still stands, you shouldn't have to compile a quark
specific kernel - just a 586TSC kernel with Quark support.
For example CentOS is bootable on Quark.
---
bod
On Wed, Mar 1, 2017 at 4:02 PM, Bryan O'Donoghue
<[email protected]> wrote:
>>> So, summarize, you state that
>>> 1. CONFIG_SMP=y and
>>> 2. CONFIG_M686=y and
>>> 3. Kernel works on Quark
>>>
>>> Is it correct?
>> Logically yes. It's a very long time since I looked in detail. No harm
>> in checking it out though.
>>
>> I'll compile up the above kernel this evening (GMT) and verify.
> CONFIG_SMP=y - no difference - like I say it's PF# on lock prefix
> instructions, not SMP=y that's the problem here
> CONFIG_M686=y (doesnt' boot)
> CONFIG_M586TSC=y does boot
> So yes M686 is not bootable on this part. My point to you about having a
> custom kernel though still stands, you shouldn't have to compile a quark
> specific kernel - just a 586TSC kernel with Quark support.
... which is not default. That's my point.
> For example CentOS is bootable on Quark.
Because someone there took care of it. (I think being i586 compatible
binaries as well)
--
With Best Regards,
Andy Shevchenko