From: "H. Peter Anvin" <hpa@zytor.com>
To: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Yinghai Lu <yinghai@kernel.org>,
Andrew Morton <akpm@linux-foundation.org>,
mingo@elte.hu, tglx@linutronix.de, linux-kernel@vger.kernel.org,
travis@sgi.com
Subject: Re: [PATCH] sparse_irq aka dyn_irq v13
Date: Sun, 16 Nov 2008 20:42:49 -0800 [thread overview]
Message-ID: <4920F649.60901@zytor.com> (raw)
In-Reply-To: <1226895741.7178.183.camel@pasglop>
Benjamin Herrenschmidt wrote:
>
> IRQ numbers are arbitrary, some platforms make up numbers out of the
> blue, or they can be hypervisor internal tokens etc...
>
> The only sane way to handle this generically IMHO is to do what we do
> on powerpc (and I think sparc64) which is to totally disconnect the HW
> number from the "linux" number.
>
Yes, that's what I want to see, too. On x86, it's important to preserve
the first 16 (BIOS-compatible, XT-PIC) numbers, as they are widely used
as a user interface, but for the rest, there is no point.
It is probably desirable to do that by overlaying the first (primary,
south bridge) IO-APIC, which also takes care of the "semi-legacy" IRQ
16-23 numbers.
-hpa
next prev parent reply other threads:[~2008-11-17 4:46 UTC|newest]
Thread overview: 66+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20081023143721.GA25783@elte.hu>
[not found] ` <49012399.4010100@kernel.org>
[not found] ` <20081027164135.GD19476@elte.hu>
[not found] ` <4912B2FE.7030804@kernel.org>
[not found] ` <20081106101715.GA4022@elte.hu>
[not found] ` <4913B45C.1000009@kernel.org>
[not found] ` <20081107081249.GB4435@elte.hu>
[not found] ` <4913F9AA.80500@kernel.org>
[not found] ` <20081107084240.GG4435@elte.hu>
[not found] ` <491434FB.2050904@kernel.org>
[not found] ` <20081107124957.GA21709@elte.hu>
2008-11-09 7:05 ` [RFC PATCH] sparse_irq aka dyn_irq Yinghai Lu
2008-11-09 7:38 ` Ingo Molnar
2008-11-09 8:03 ` Yinghai Lu
2008-11-10 9:40 ` Ingo Molnar
2008-11-10 9:51 ` [PATCH] sparse_irq aka dyn_irq v10 Yinghai Lu
2008-11-10 9:53 ` Ingo Molnar
2008-11-10 9:55 ` Yinghai Lu
2008-11-10 9:57 ` Ingo Molnar
2008-11-10 9:55 ` [RFC PATCH] sparse_irq aka dyn_irq Andrew Morton
2008-11-10 10:00 ` Yinghai Lu
2008-11-10 10:03 ` Ingo Molnar
2008-11-10 10:05 ` Yinghai Lu
2008-11-10 10:09 ` Ingo Molnar
2008-11-10 19:47 ` Yinghai Lu
2008-11-11 6:28 ` [PATCH] sparse_irq aka dyn_irq v11 Yinghai Lu
[not found] ` <491A9F87.8040403@kernel.org>
[not found] ` <20081112120814.GG11352@elte.hu>
2008-11-13 7:01 ` [PATCH] sparse_irq aka dyn_irq v13 Yinghai Lu
2008-11-13 9:53 ` Ingo Molnar
2008-11-13 20:06 ` Yinghai Lu
2008-11-13 20:16 ` Yinghai Lu
2008-11-13 21:18 ` Andrew Morton
2008-11-13 21:21 ` Ingo Molnar
2008-11-13 22:01 ` Yinghai Lu
2008-11-13 22:05 ` Ingo Molnar
2008-11-13 22:13 ` Andrew Morton
2008-11-13 22:41 ` Yinghai Lu
2008-11-13 22:58 ` Andrew Morton
2008-11-13 23:15 ` Mike Travis
2008-11-13 23:24 ` Yinghai Lu
2008-11-14 0:20 ` Mike Travis
2008-11-14 0:29 ` Yinghai Lu
2008-11-14 6:29 ` [PATCH] sparse_irq aka dyn_irq v14 Yinghai Lu
2008-11-14 6:46 ` Andrew Morton
2008-11-15 9:05 ` Yinghai Lu
2008-11-13 22:19 ` [PATCH] sparse_irq aka dyn_irq v13 Paul Mackerras
2008-11-13 22:23 ` David Miller
2008-11-13 23:11 ` Mike Travis
2008-11-13 23:14 ` David Miller
2008-11-14 0:15 ` Mike Travis
2008-11-14 0:21 ` David Miller
2008-11-14 0:39 ` Mike Travis
2008-11-14 2:37 ` David Miller
2008-11-14 3:06 ` Mike Travis
2008-11-16 20:58 ` Benjamin Herrenschmidt
2008-11-16 23:44 ` Yinghai Lu
2008-11-16 23:48 ` H. Peter Anvin
2008-11-16 23:54 ` Yinghai Lu
2008-11-16 23:59 ` H. Peter Anvin
2008-11-17 0:21 ` Yinghai Lu
2008-11-17 0:26 ` H. Peter Anvin
2008-11-17 0:36 ` Yinghai Lu
2008-11-17 0:48 ` H. Peter Anvin
2008-11-17 0:58 ` Yinghai Lu
2008-11-17 1:00 ` H. Peter Anvin
2008-11-17 2:03 ` Mike Travis
2008-11-17 4:27 ` Benjamin Herrenschmidt
2008-11-17 4:26 ` Benjamin Herrenschmidt
2008-11-17 20:25 ` Jeremy Fitzhardinge
2008-11-17 4:25 ` Benjamin Herrenschmidt
2008-11-17 4:22 ` Benjamin Herrenschmidt
2008-11-17 1:51 ` Mike Travis
2008-11-17 4:39 ` H. Peter Anvin
2008-11-17 4:22 ` Benjamin Herrenschmidt
2008-11-17 4:42 ` H. Peter Anvin [this message]
2008-11-17 6:52 ` Benjamin Herrenschmidt
2008-11-09 8:36 ` [RFC PATCH] sparse_irq aka dyn_irq H. Peter Anvin
2008-11-09 7:50 ` Cyrill Gorcunov
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