From: Jeff Garzik <jeff@garzik.org>
To: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>,
Andrew Morton <akpm@osdl.org>,
linux-kernel@vger.kernel.org, linux-acpi@vger.kernel.org,
linux-pci@atrey.karlin.mff.cuni.cz, discuss@x86-64.org,
Ingo Molnar <mingo@elte.hu>, Thomas Gleixner <tglx@linutronix.de>,
Andi Kleen <ak@suse.de>,
Natalie Protasevich <Natalie.Protasevich@UNISYS.com>,
Len Brown <len.brown@intel.com>,
Kimball Murray <kimball.murray@gmail.com>,
Brice Goglin <brice@myri.com>,
Greg Lindahl <greg.lindahl@qlogic.com>,
Dave Olson <olson@unixfolk.com>, Greg KH <gregkh@suse.de>,
Grant Grundler <iod00d@hp.com>, "bibo,mao" <bibo.mao@intel.com>,
Rajesh Shah <rajesh.shah@intel.com>, Mark Maule <maule@sgi.com>,
Jesper Juhl <jesper.juhl@gmail.com>,
Shaohua Li <shaohua.li@intel.com>,
Matthew Wilcox <matthew@wil.cx>,
"Michael S. Tsirkin" <mst@mellanox.co.il>,
Ashok Raj <ashok.raj@intel.com>, Randy Dunlap <rdunlap@x>
Subject: Re: [PATCH 9/25] irq: Add a dynamic irq creation API
Date: Tue, 20 Jun 2006 21:41:43 -0400 [thread overview]
Message-ID: <4498A3D7.6030406@garzik.org> (raw)
In-Reply-To: <1150853583.12507.53.camel@localhost.localdomain>
Benjamin Herrenschmidt wrote:
> I have neither b) nor c) nowadays on powerpc.... "linux" irq numbers are
> purely a virtual thing, that is an index in irq_desc array and something
> we give to drivers to do request_irq() from. They can map onto hw
> interrupts, MSI-like messages, environment interrupts, could be
> hypervisor messgaes, in fact, it could be anything that remotely looks
> like an interrupt and the concept of "hw vector" is very blurry here...
> every interrupt controller defines it's own hardware vector space. On
> pSeries, hardware vectors are fairly big numbers that can encode the
> geographical location of the slot where the device is connected to, on
> some other hypervisor, they are 64 bits "tokens" representing an
> hypervisor object that can send events, etc etc....
Indeed... The return value from return_irq() is purely a cookie, and
has been for quite some time.
Jeff
WARNING: multiple messages have this Message-ID (diff)
From: Jeff Garzik <jeff@garzik.org>
To: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: "Eric W. Biederman" <ebiederm@xmission.com>,
Andrew Morton <akpm@osdl.org>,
linux-kernel@vger.kernel.org, linux-acpi@vger.kernel.org,
linux-pci@atrey.karlin.mff.cuni.cz, discuss@x86-64.org,
Ingo Molnar <mingo@elte.hu>, Thomas Gleixner <tglx@linutronix.de>,
Andi Kleen <ak@suse.de>,
Natalie Protasevich <Natalie.Protasevich@UNISYS.com>,
Len Brown <len.brown@intel.com>,
Kimball Murray <kimball.murray@gmail.com>,
Brice Goglin <brice@myri.com>,
Greg Lindahl <greg.lindahl@qlogic.com>,
Dave Olson <olson@unixfolk.com>, Greg KH <gregkh@suse.de>,
Grant Grundler <iod00d@hp.com>, "bibo,mao" <bibo.mao@intel.com>,
Rajesh Shah <rajesh.shah@intel.com>, Mark Maule <maule@sgi.com>,
Jesper Juhl <jesper.juhl@gmail.com>,
Shaohua Li <shaohua.li@intel.com>,
Matthew Wilcox <matthew@wil.cx>,
"Michael S. Tsirkin" <mst@mellanox.co.il>,
Ashok Raj <ashok.raj@intel.com>,
Randy Dunlap <rdunlap@xenotime.net>,
Roland Dreier <rdreier@cisco.com>,
Tony Luck <tony.luck@intel.com>
Subject: Re: [PATCH 9/25] irq: Add a dynamic irq creation API
Date: Tue, 20 Jun 2006 21:41:43 -0400 [thread overview]
Message-ID: <4498A3D7.6030406@garzik.org> (raw)
In-Reply-To: <1150853583.12507.53.camel@localhost.localdomain>
Benjamin Herrenschmidt wrote:
> I have neither b) nor c) nowadays on powerpc.... "linux" irq numbers are
> purely a virtual thing, that is an index in irq_desc array and something
> we give to drivers to do request_irq() from. They can map onto hw
> interrupts, MSI-like messages, environment interrupts, could be
> hypervisor messgaes, in fact, it could be anything that remotely looks
> like an interrupt and the concept of "hw vector" is very blurry here...
> every interrupt controller defines it's own hardware vector space. On
> pSeries, hardware vectors are fairly big numbers that can encode the
> geographical location of the slot where the device is connected to, on
> some other hypervisor, they are 64 bits "tokens" representing an
> hypervisor object that can send events, etc etc....
Indeed... The return value from return_irq() is purely a cookie, and
has been for quite some time.
Jeff
next prev parent reply other threads:[~2006-06-21 1:41 UTC|newest]
Thread overview: 99+ messages / expand[flat|nested] mbox.gz Atom feed top
2006-06-20 22:24 [PATCH 0/25] Decouple IRQ issues (MSI, i386, x86_64, ia64) Eric W. Biederman
2006-06-20 22:24 ` Eric W. Biederman
2006-06-20 22:28 ` [PATCH 1/25] irq: Convert the move_irq flag from a 32bit word to a single bit Eric W. Biederman
2006-06-20 22:28 ` Eric W. Biederman
2006-06-20 22:28 ` [PATCH 2/25] irq: Add moved_masked_irq Eric W. Biederman
2006-06-20 22:28 ` Eric W. Biederman
2006-06-20 22:28 ` [PATCH 3/25] x86_64 irq: Reenable migrating irqs to other cpus Eric W. Biederman
2006-06-20 22:28 ` Eric W. Biederman
2006-06-20 22:28 ` [PATCH 4/25] msi: Simplify msi enable and disable Eric W. Biederman
2006-06-20 22:28 ` Eric W. Biederman
2006-06-20 22:28 ` [PATCH 5/25] msi: Make the msi boolean tests return either 0 or 1 Eric W. Biederman
2006-06-20 22:28 ` Eric W. Biederman
2006-06-20 22:28 ` [PATCH 6/25] msi: Implement helper functions read_msi_msg and write_msi_msg Eric W. Biederman
2006-06-20 22:28 ` Eric W. Biederman
2006-06-20 22:28 ` [PATCH 7/25] msi: Refactor the msi_ops Eric W. Biederman
2006-06-20 22:28 ` Eric W. Biederman
2006-06-20 22:28 ` [PATCH 8/25] msi: Simplify the msi irq limit policy Eric W. Biederman
2006-06-20 22:28 ` Eric W. Biederman
2006-06-20 22:28 ` [PATCH 9/25] irq: Add a dynamic irq creation API Eric W. Biederman
2006-06-20 22:28 ` Eric W. Biederman
2006-06-20 22:28 ` [PATCH 10/25] ia64 irq: Dynamic irq support Eric W. Biederman
2006-06-20 22:28 ` Eric W. Biederman
2006-06-20 22:28 ` [PATCH 11/25] i386 " Eric W. Biederman
2006-06-20 22:28 ` Eric W. Biederman
2006-06-20 22:28 ` [PATCH 12/25] x86_64 " Eric W. Biederman
2006-06-20 22:28 ` Eric W. Biederman
2006-06-20 22:28 ` [PATCH 13/25] msi: Make the msi code irq based and not vector based Eric W. Biederman
2006-06-20 22:28 ` Eric W. Biederman
2006-06-20 22:28 ` [PATCH 14/25] x86_64 irq: Move msi message composition into io_apic.c Eric W. Biederman
2006-06-20 22:28 ` Eric W. Biederman
2006-06-20 22:28 ` [PATCH 15/25] i386 " Eric W. Biederman
2006-06-20 22:28 ` Eric W. Biederman
2006-06-20 22:28 ` [PATCH 16/25] msi: Only build msi-apic.c on ia64 Eric W. Biederman
2006-06-20 22:28 ` Eric W. Biederman
2006-06-20 22:28 ` [PATCH 17/25] x86_64 irq: Remove the msi assumption that irq == vector Eric W. Biederman
2006-06-20 22:28 ` Eric W. Biederman
2006-06-20 22:28 ` [PATCH 18/25] i386 " Eric W. Biederman
2006-06-20 22:28 ` Eric W. Biederman
2006-06-20 22:28 ` [PATCH 19/25] irq: Remove msi hacks Eric W. Biederman
2006-06-20 22:28 ` Eric W. Biederman
2006-06-20 22:28 ` [PATCH 20/25] irq: Generalize the check for HARDIRQ_BITS Eric W. Biederman
2006-06-20 22:28 ` Eric W. Biederman
2006-06-20 22:28 ` [PATCH 21/25] x86_64 irq: Make the external irq handlers report their vector, not the irq number Eric W. Biederman
2006-06-20 22:28 ` Eric W. Biederman
2006-06-20 22:28 ` [PATCH 22/25] x86_64 irq: make vector_irq per cpu Eric W. Biederman
2006-06-20 22:28 ` Eric W. Biederman
2006-06-20 22:28 ` [PATCH 23/25] x86_64 irq: Kill gsi_irq_sharing Eric W. Biederman
2006-06-20 22:28 ` Eric W. Biederman
2006-06-20 22:28 ` [PATCH 24/25] x86_64 irq: Kill irq compression Eric W. Biederman
2006-06-20 22:28 ` Eric W. Biederman
2006-06-20 22:28 ` [PATCH 25/25] irq: Document what an IRQ is Eric W. Biederman
2006-06-20 22:28 ` Eric W. Biederman
2006-06-21 1:50 ` [PATCH 11/25] i386 irq: Dynamic irq support Rajesh Shah
2006-06-21 1:50 ` Rajesh Shah
2006-06-21 2:21 ` Eric W. Biederman
2006-06-21 2:27 ` Rajesh Shah
2006-06-21 2:27 ` Rajesh Shah
2006-06-21 14:07 ` Eric W. Biederman
2006-06-20 23:56 ` [PATCH 9/25] irq: Add a dynamic irq creation API Benjamin Herrenschmidt
2006-06-20 23:56 ` Benjamin Herrenschmidt
2006-06-21 1:01 ` Eric W. Biederman
2006-06-21 1:01 ` Eric W. Biederman
2006-06-21 1:33 ` Benjamin Herrenschmidt
2006-06-21 1:33 ` Benjamin Herrenschmidt
2006-06-21 1:41 ` Jeff Garzik [this message]
2006-06-21 1:41 ` Jeff Garzik
2006-06-21 1:36 ` Matthew Wilcox
2006-06-21 1:36 ` Matthew Wilcox
2006-06-21 12:52 ` powerpc new irq remapper patches Benjamin Herrenschmidt
2006-06-21 1:28 ` [PATCH 8/25] msi: Simplify the msi irq limit policy Rajesh Shah
2006-06-21 1:28 ` Rajesh Shah
2006-06-21 2:46 ` Roland Dreier
2006-06-21 2:46 ` Roland Dreier
2006-06-21 3:48 ` Eric W. Biederman
2006-06-21 3:48 ` Eric W. Biederman
2006-06-21 1:18 ` [PATCH 7/25] msi: Refactor the msi_ops Rajesh Shah
2006-06-21 1:18 ` Rajesh Shah
2006-06-21 1:04 ` [PATCH 6/25] msi: Implement helper functions read_msi_msg and write_msi_msg Rajesh Shah
2006-06-21 1:04 ` Rajesh Shah
2006-06-21 1:43 ` Eric W. Biederman
2006-06-21 1:43 ` Eric W. Biederman
2006-06-20 22:45 ` [PATCH 5/25] msi: Make the msi boolean tests return either 0 or 1 Jeff Garzik
2006-06-20 22:45 ` Jeff Garzik
2006-06-21 0:44 ` [PATCH 4/25] msi: Simplify msi enable and disable Rajesh Shah
2006-06-21 0:44 ` Rajesh Shah
2006-06-21 1:19 ` Eric W. Biederman
2006-06-21 1:19 ` Eric W. Biederman
2006-06-21 0:30 ` [PATCH 0/25] Decouple IRQ issues (MSI, i386, x86_64, ia64) Rajesh Shah
2006-06-21 0:30 ` Rajesh Shah
2006-06-21 1:07 ` Eric W. Biederman
2006-06-21 1:07 ` Eric W. Biederman
2006-06-21 14:10 ` [PATCH] Decouple IRQ issues (fix i386 compile issues) Eric W. Biederman
2006-06-21 14:10 ` Eric W. Biederman
2006-06-21 10:24 ` [PATCH 0/25] Decouple IRQ issues (MSI, i386, x86_64, ia64) Ingo Molnar
2006-06-21 10:24 ` Ingo Molnar
2006-06-21 16:25 ` Greg KH
2006-06-21 16:25 ` Greg KH
2006-06-22 3:55 ` Eric W. Biederman
2006-06-22 3:55 ` Eric W. Biederman
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