From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: "H. Peter Anvin" <hpa@zytor.com>
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: Mon, 17 Nov 2008 15:22:21 +1100 [thread overview]
Message-ID: <1226895741.7178.183.camel@pasglop> (raw)
In-Reply-To: <4920B15E.6090200@zytor.com>
On Sun, 2008-11-16 at 15:48 -0800, H. Peter Anvin wrote:
> Yinghai Lu wrote:
> > 2. make irq number is bus/devfn/idx, and every dev func will use 12bit range, irq number is relatively fixed not like current MSI irq creating is some kind of floating from NR_IRQS too.
>
> 2 is *STILL WRONG*, dammit!
>
> You keep bringing this one up, but our PCI addressing is
> *DOMAIN*/bus/devfn -- it falls flat on its face when you have more than
> 16 PCI domains. CAN WE PLEASE STOP WITH THIS FOOLISHNESS NOW!
Besides, the relationship between PCI location and IRQ numbers seems to
be an x86 thingy ... don't bring that into the generic code please !
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.
Ben.
next prev parent reply other threads:[~2008-11-17 4:23 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 [this message]
2008-11-17 4:42 ` H. Peter Anvin
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
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1226895741.7178.183.camel@pasglop \
--to=benh@kernel.crashing.org \
--cc=akpm@linux-foundation.org \
--cc=hpa@zytor.com \
--cc=linux-kernel@vger.kernel.org \
--cc=mingo@elte.hu \
--cc=tglx@linutronix.de \
--cc=travis@sgi.com \
--cc=yinghai@kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox