Re: [PATCH 3/9] x86/moorestown: add moorestown platform flags

[Ingo Molnar]

* Alan Cox <alan@xxxxxxxxxxxxxxxxxxx> wrote:

> > We will gladly take clean x86 patches that abstract away 
> > lowlevel details of x86 platforms, and have been taking them and 
> > have been writing them for a long time. If this patch-set can 
> > shape itself in such a way (as i requested), without hindering 
> > the common case, it is certainly welcome.
> 
> Lets try again shall we. I'l repeat the relevant bits of the mail 
> you quoted bits from and ignored almost all of

Below is my reply to your above points (already sent in another 
mail) - which is really just mostly re-hashing the (rather obvious 
looking) things that have been said before.

	Ingo

---------------------->

* Alan Cox <alan@xxxxxxxxxxxxxxxxxxx> wrote:

> > The thing is, you are trying to defend a v1 patch-set here that 
> > is really indefensible: it's ugly and deficient in numerous 
> > smaller and larger details. I outlined numerous deficiencies 
> > already - and i'll review v2 too to see what else is there to 
> > fix.
> 
> No I'm trying to understand what you actually want the thing to 
> look like.

It's a case by case thing and i pointed out a few specific 
directions in the review. The IO-APIC changes should probably go on 
top of Jeremy's IO-APIC driver-ization patches. They dont 
necessarily need their own IO-APIC driver (if the resulting line 
count increase is too much), but they should not wreck Jeremy's 
IO-APIC patches.

Bootup quirks that are small modificatons to existing PC 
initialization sequences should go into x86_quirks.

Timer related changes (the APB system timer) are mostly modular 
already by virtue of half of it being a clocksource and clockevents 
driver. The remaining bit of system timer handling should be 
abstracted out as a 'struct x86_system_timer' kind of structure, 
with ->init, ->timer_irq and ->shutdown functions.

[ Although it is beyond me why ABP was done - why wasnt HPET good
  enough? HPET can do per CPU clockevents too and it's just as 
  off-chip (and hence fundamentally slow) as ABP. ]

	Ingo
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