linux-kernel - Re: HPET : Legacy Routing Replacement Enable

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Date:	Fri, 27 Oct 2006 15:31:32 -0700
From:	"Om Narasimhan" <om.turyx@...il.com>
To:	"Mika Penttilä" <mika.penttila@...umbus.fi>
Cc:	"Vojtech Pavlik" <vojtech@...e.cz>, "Andi Kleen" <ak@....de>,
	"Pallipadi, Venkatesh" <venkatesh.pallipadi@...el.com>,
	linux-kernel@...r.kernel.org, randy.dunlap@...cle.com,
	clemens@...isch.de, bob.picco@...com
Subject: Re: HPET : Legacy Routing Replacement Enable - 3rd try.

> >
> >
> There seems to be lot of confusion here. Current code isn't using hpet
> as tick source if legacy is not supported. This patch adds
> hpet_lrr_force but it's not clear how it interacts with hpet_use_timer -
> in some places it is hpet_use_timer and some (hpet_use_timer &&
> hpet_lrr_force).
>
> The timer is routed to ioapic pin 2 which is irq0 with source override.
> With this patch with hpet_lrr_force=1 timer irq is set to 2 for x86_64
> and 0 for i386, that can't be right?
Hmm... if hpet_lrr_force=1, timer irq should be set to 2 both in
x86_64 as well as i386.
This is my mistake. I should test more thoroughly :-(

Thanks for comments.
Om.

>
> --Mika
>
>
>
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